[EDF26238] : fix performance on MEDFileMesh::getGroupsOnSpecifiedLev method

[tools/medcoupling.git] / src / MEDLoader / MEDFileMesh.cxx

// Copyright (C) 2007-2022  CEA/DEN, EDF R&D
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
//
// See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
//
// Author : Anthony Geay (CEA/DEN)

#include "MEDFileMesh.hxx"
#include "MEDFileFieldOverView.hxx"
#include "MEDFileField.hxx"
#include "MEDLoader.hxx"
#include "MEDLoaderNS.hxx"
#include "MEDFileSafeCaller.txx"
#include "MEDLoaderBase.hxx"

#include "MEDCouplingUMesh.hxx"
#include "MEDCouplingMappedExtrudedMesh.hxx"
#include "MEDCouplingMemArray.txx"

#include "InterpKernelAutoPtr.hxx"

#include <limits>
#include <cmath>

// From MEDLOader.cxx TU
extern med_geometry_type                 typmai[MED_N_CELL_FIXED_GEO];
extern INTERP_KERNEL::NormalizedCellType typmai2[MED_N_CELL_FIXED_GEO];
extern med_geometry_type typmai3[INTERP_KERNEL::NORM_MAXTYPE];

using namespace MEDCoupling;

const char MEDFileMesh::DFT_FAM_NAME[]="FAMILLE_ZERO";

const char MEDFileUMesh::SPE_FAM_STR_EXTRUDED_MESH[]="HIDDEN_FAM_EXT_MESH@";

MEDFileMesh::MEDFileMesh():_order(-1),_iteration(-1),_time(0.),_univ_wr_status(true),_axis_type(AX_CART)
{
}

std::size_t MEDFileMesh::getHeapMemorySizeWithoutChildren() const
{
  std::size_t ret(_dt_unit.capacity()+_name.capacity()+_univ_name.capacity()+_desc_name.capacity());
  for(std::map<std::string, std::vector<std::string> >::const_iterator it=_groups.begin();it!=_groups.end();it++)
    {
      ret+=(*it).first.capacity()+(*it).second.capacity()*sizeof(std::string);
      for(std::vector<std::string>::const_iterator it2=(*it).second.begin();it2!=(*it).second.end();it2++)
        ret+=(*it2).capacity();
    }
  for(std::map<std::string,mcIdType>::const_iterator it=_families.begin();it!=_families.end();it++)
    ret+=(*it).first.capacity()+sizeof(mcIdType);
  return ret;
}

std::vector<const BigMemoryObject *> MEDFileMesh::getDirectChildrenWithNull() const
{
  std::vector<const BigMemoryObject *> ret(1);
  ret[0]=(const MEDFileEquivalences *)_equiv;
  return ret;
}

/*!
 * Returns a new MEDFileMesh holding the mesh data that has been read from a given MED
 * file. The first mesh in the file is loaded.
 *  \param [in] fileName - the name of MED file to read.
 *  \return MEDFileMesh * - a new instance of MEDFileMesh. The caller is to delete this
 *          mesh using decrRef() as it is no more needed. 
 *  \throw If the file is not readable.
 *  \throw If there is no meshes in the file.
 *  \throw If the mesh in the file is of a not supported type.
 */
MEDFileMesh *MEDFileMesh::New(const std::string& fileName, MEDFileMeshReadSelector *mrs)
{
  MEDFileUtilities::AutoFid fid(OpenMEDFileForRead(fileName));
  return New(fid,mrs);
}

MEDFileMesh *MEDFileMesh::New(med_idt fid, MEDFileMeshReadSelector *mrs)
{
  std::vector<std::string> ms(MEDLoaderNS::getMeshNamesFid(fid));
  if(ms.empty())
    {
      std::ostringstream oss; oss << "MEDFileMesh::New : no meshes in file \"" << FileNameFromFID(fid) << "\" !";
      throw INTERP_KERNEL::Exception(oss.str().c_str());
    }
  MEDCoupling::MEDCouplingMeshType meshType;
  int dt,it;
  std::string dummy2;
  MEDCoupling::MEDCouplingAxisType dummy3;
  MEDFileMeshL2::GetMeshIdFromName(fid,ms.front(),meshType,dummy3,dt,it,dummy2);
  MCAuto<MEDFileMesh> ret;
  switch(meshType)
  {
    case UNSTRUCTURED:
      {
        ret=MEDFileUMesh::New();
        break;
      }
    case CARTESIAN:
      {
        ret=MEDFileCMesh::New();
        break;
      }
    case CURVE_LINEAR:
      {
        ret=MEDFileCurveLinearMesh::New();
        break;
      }
    default:
      {
        std::ostringstream oss; oss << "MEDFileMesh::New : MED file exists and has mesh '" << ms.front() << "' exists but unsupported type yet !";
        throw INTERP_KERNEL::Exception(oss.str().c_str());
      }
  }
  ret->loadLLWithAdditionalItems(fid,ms.front(),dt,it,mrs);
  return ret.retn();
}

/*!
 * Returns a new MEDFileMesh holding the mesh data that has been read from a given MED
 * file. The mesh to load is specified by its name and numbers of a time step and an
 * iteration.
 *  \param [in] fileName - the name of MED file to read.
 *  \param [in] mName - the name of the mesh to read.
 *  \param [in] dt - the number of a time step.
 *  \param [in] it - the number of an iteration.
 *  \param [in] joints - the sub-domain joints to use instead of those that can be read
 *          from the MED file. Usually this joints are those just read by another iteration
 *          of mName mesh, when this method is called by MEDFileMeshMultiTS::New()
 *  \return MEDFileMesh * - a new instance of MEDFileMesh. The caller is to delete this
 *          mesh using decrRef() as it is no more needed. 
 *  \throw If the file is not readable.
 *  \throw If there is no mesh with given attributes in the file.
 *  \throw If the mesh in the file is of a not supported type.
 */
MEDFileMesh *MEDFileMesh::New(const std::string& fileName, const std::string& mName, int dt, int it, MEDFileMeshReadSelector *mrs, MEDFileJoints* joints)
{
  MEDFileUtilities::AutoFid fid(OpenMEDFileForRead(fileName));
  return New(fid,mName,dt,it,mrs,joints);
}

MEDFileMesh *MEDFileMesh::New(med_idt fid, const std::string& mName, int dt, int it, MEDFileMeshReadSelector *mrs, MEDFileJoints* joints)
{
  MEDCoupling::MEDCouplingMeshType meshType;
  int dummy0,dummy1;
  std::string dummy2;
  MEDCoupling::MEDCouplingAxisType dummy3;
  MEDFileMeshL2::GetMeshIdFromName(fid,mName,meshType,dummy3,dummy0,dummy1,dummy2);
  MCAuto<MEDFileMesh> ret;
  switch(meshType)
  {
    case UNSTRUCTURED:
      {
        ret=MEDFileUMesh::New();
        break;
      }
    case CARTESIAN:
      {
        ret=MEDFileCMesh::New();
        break;
      }
    case CURVE_LINEAR:
      {
        ret=MEDFileCurveLinearMesh::New();
        break;
      }
    default:
      {
        std::ostringstream oss; oss << "MEDFileMesh::New : MED file exists and has mesh '" << mName << "' exists but unsupported type yet !";
        throw INTERP_KERNEL::Exception(oss.str().c_str());
      }
  }
  ret->loadLLWithAdditionalItems(fid,mName,dt,it,mrs);
  return ret.retn();
}

/*!
 * Writes \a this mesh into an open MED file specified by its descriptor.
 *  \param [in] fid - the MED file descriptor.
 *  \throw If the mesh name is not set.
 *  \throw If the file is open for reading only.
 *  \throw If the writing mode == 1 and the same data is present in an existing file.
 */
void MEDFileMesh::writeLL(med_idt fid) const
{
  if(!existsFamily(0))
    const_cast<MEDFileMesh *>(this)->addFamily(DFT_FAM_NAME,0);
  if(_name.empty())
    throw INTERP_KERNEL::Exception("MEDFileMesh : name is empty. MED file ask for a NON EMPTY name !");
  writeMeshLL(fid);
  writeJoints(fid);
  const MEDFileEquivalences *eqs(_equiv);
  if(eqs)
    eqs->writeLL(fid);
}

/*!
 * Checks if \a this and another mesh are equal.
 *  \param [in] other - the mesh to compare with.
 *  \param [in] eps - a precision used to compare real values.
 *  \param [in,out] what - the string returning description of unequal data.
 *  \return bool - \c true if the meshes are equal, \c false, else.
 */
bool MEDFileMesh::isEqual(const MEDFileMesh *other, double eps, std::string& what) const
{
  if(_order!=other->_order)
    {
      what="Orders differ !";
      return false;
    }
  if(_iteration!=other->_iteration)
    {
      what="Iterations differ !";
      return false;
    }
  if(fabs(_time-other->_time)>eps)
    {
      what="Time values differ !";
      return false;
    }
  if(_dt_unit!=other->_dt_unit)
    {
      what="Time units differ !";
      return false;
    }
  if(_name!=other->_name)
    {
      what="Names differ !";
      return false;
    }
  //univ_name has been ignored -> not a bug because it is a mutable attribute
  if(_desc_name!=other->_desc_name)
    {
      what="Description names differ !";
      return false;
    }
  if(!areGrpsEqual(other,what))
    return false;
  if(!areFamsEqual(other,what))
    return false;
  if(!areEquivalencesEqual(other,what))
    return false;
  return true;
}

void MEDFileMesh::setName(const std::string& name)
{
  _name=name;
}

/*!
 * Clears redundant attributes of incorporated data arrays.
 */
void MEDFileMesh::clearNonDiscrAttributes() const
{

}

bool MEDFileMesh::changeNames(const std::vector< std::pair<std::string,std::string> >& modifTab)
{
  for(std::vector< std::pair<std::string,std::string> >::const_iterator it=modifTab.begin();it!=modifTab.end();it++)
    {
      if((*it).first==_name)
        {
          _name=(*it).second;
          return true;
        }
    }
  return false;
}

/*!
 * Copies data on groups and families from another mesh.
 *  \param [in] other - the mesh to copy the data from.
 */
void MEDFileMesh::copyFamGrpMapsFrom(const MEDFileMesh& other)
{
  _groups=other._groups;
  _families=other._families;
}


/*!
 * This method clear all the groups in the map.
 * So this method does not operate at all on arrays.
 * So this method can lead to orphan families.
 * 
 * \sa MEDFileMesh::clearFamMap, MEDFileMesh::clearFamGrpMaps
 */
void MEDFileMesh::clearGrpMap()
{
  _groups.clear();
}

/*!
 * This method clear all the families in the map.
 * So this method does not operate at all on arrays.
 * WARNING ! if there are some groups lying on cleared families, those groups will be impacted !
 *
 * \sa MEDFileMesh::clearFamMap, MEDFileMesh::clearFamGrpMaps
 */
void MEDFileMesh::clearFamMap()
{
  _families.clear();
}

/*!
 * This method clear all the families and groups in the map.
 * So this method does not operate at all on arrays.
 * As all groups and families entry will be removed after 
 * the call of MEDFileMesh::setFamilyFieldArr method with 0 or None (python) in the 2nd parameter can be useful to reduce the size of the object.
 *
 * \sa MEDFileMesh::clearFamMap, MEDFileMesh::clearFamMap
 */
void MEDFileMesh::clearFamGrpMaps()
{
  clearGrpMap();
  clearFamMap();
}

/*!
 * Returns names of families constituting a group.
 *  \param [in] name - the name of the group of interest.
 *  \return std::vector<std::string> - a sequence of names of the families.
 *  \throw If the name of a nonexistent group is specified.
 */
std::vector<std::string> MEDFileMesh::getFamiliesOnGroup(const std::string& name) const
{
  std::string oname(name);
  std::map<std::string, std::vector<std::string> >::const_iterator it=_groups.find(oname);
  if(it==_groups.end())
    {
      std::vector<std::string> grps=getGroupsNames();
      std::ostringstream oss; oss << "No such groupname \"" << name << "\" !\nAvailable groups are :";
      std::copy(grps.begin(),grps.end(),std::ostream_iterator<std::string>(oss," "));
      throw INTERP_KERNEL::Exception(oss.str().c_str());
    }
  return (*it).second;
}

/*!
 * Returns names of families constituting some groups.
 *  \param [in] grps - a sequence of names of groups of interest.
 *  \return std::vector<std::string> - a sequence of names of the families.
 *  \throw If a name of a nonexistent group is present in \a grps.
 */
std::vector<std::string> MEDFileMesh::getFamiliesOnGroups(const std::vector<std::string>& grps) const
{
  std::set<std::string> fams;
  for(std::vector<std::string>::const_iterator it=grps.begin();it!=grps.end();it++)
    {
      std::map<std::string, std::vector<std::string> >::const_iterator it2=_groups.find(*it);
      if(it2==_groups.end())
        {
          std::ostringstream oss; oss << "No such group in mesh \"" << _name << "\" : " << *it; 
          std::vector<std::string> grps2=getGroupsNames(); oss << "\" !\nAvailable groups are :";
          std::copy(grps2.begin(),grps2.end(),std::ostream_iterator<std::string>(oss," "));
          throw INTERP_KERNEL::Exception(oss.str().c_str());
        }
      fams.insert((*it2).second.begin(),(*it2).second.end());
    }
  std::vector<std::string> fams2(fams.begin(),fams.end());
  return fams2;
}

/*!
 * Returns ids of families constituting a group.
 *  \param [in] name - the name of the group of interest.
 *  \return std::vector<int> - sequence of ids of the families.
 *  \throw If the name of a nonexistent group is specified.
 */
std::vector<mcIdType> MEDFileMesh::getFamiliesIdsOnGroup(const std::string& name) const
{
  std::string oname(name);
  std::map<std::string, std::vector<std::string> >::const_iterator it=_groups.find(oname);
  std::vector<std::string> grps=getGroupsNames();
  if(it==_groups.end())
    {
      std::ostringstream oss; oss << "No such groupname \"" << name << "\" !\nAvailable groups are :";
      std::copy(grps.begin(),grps.end(),std::ostream_iterator<std::string>(oss," "));
      throw INTERP_KERNEL::Exception(oss.str().c_str());
    }
  return getFamiliesIds((*it).second);
}

/*!
 * Sets names of families constituting a group. If data on families of this group is
 * already present, it is overwritten. Every family in \a fams is checked, and if a
 family is not yet in \a this mesh, the default group id \c 0 is assigned to it.
 *  \param [in] name - the name of the group of interest.
 *  \param [in] fams - a sequence of names of families constituting the group.
 */
void MEDFileMesh::setFamiliesOnGroup(const std::string& name, const std::vector<std::string>& fams)
{
  std::string oname(name);
  _groups[oname]=fams;
  for(std::vector<std::string>::const_iterator it1=fams.begin();it1!=fams.end();it1++)
    {
      std::map<std::string,mcIdType>::iterator it2=_families.find(*it1);
      if(it2==_families.end())
        _families[*it1]=0;
    }
}

/*!
 * Sets families constituting a group. The families are specified by their ids.
 * If a family name is not found by its id, an exception is thrown.
 * If several families have same id, the first one in lexical order is taken.
 *  \param [in] name - the name of the group of interest.
 *  \param [in] famIds - a sequence of ids of families constituting the group.
 *  \throw If a family name is not found by its id.
 */
void MEDFileMesh::setFamiliesIdsOnGroup(const std::string& name, const std::vector<mcIdType>& famIds)
{
  std::string oname(name);
  std::vector<std::string> fams(famIds.size());
  int i=0;
  for(std::vector<mcIdType>::const_iterator it1=famIds.begin();it1!=famIds.end();it1++,i++)
    {
      std::string name2=getFamilyNameGivenId(*it1);
      fams[i]=name2;
    }
  _groups[oname]=fams;
}

/*!
 * Returns names of groups including a given family.
 *  \param [in] name - the name of the family of interest.
 *  \return std::vector<std::string> - a sequence of names of groups including the family.
 */
std::vector<std::string> MEDFileMesh::getGroupsOnFamily(const std::string& name) const
{
  std::vector<std::string> ret;
  for(std::map<std::string, std::vector<std::string> >::const_iterator it1=_groups.begin();it1!=_groups.end();it1++)
    {
      for(std::vector<std::string>::const_iterator it2=(*it1).second.begin();it2!=(*it1).second.end();it2++)
        if((*it2)==name)
          {
            ret.push_back((*it1).first);
            break;
          }
    }
  return ret;
}

/*!
 * Adds an existing family to groups.
 *  \param [in] famName - a name of family to add to \a grps.
 *  \param [in] grps - a sequence of group names to add the family in.
 *  \throw If a family named \a famName not yet exists.
 */
void MEDFileMesh::setGroupsOnFamily(const std::string& famName, const std::vector<std::string>& grps)
{
  std::string fName(famName);
  const std::map<std::string,mcIdType>::const_iterator it=_families.find(fName);
  if(it==_families.end())
    {
      std::vector<std::string> fams=getFamiliesNames();
      std::ostringstream oss; oss << "No such familyname \"" << fName << "\" !\nAvailable families are :";
      std::copy(fams.begin(),fams.end(),std::ostream_iterator<std::string>(oss," "));
      throw INTERP_KERNEL::Exception(oss.str().c_str());
    }
  for(std::vector<std::string>::const_iterator it3=grps.begin();it3!=grps.end();it3++)
    {
      std::map< std::string, std::vector<std::string> >::iterator it2=_groups.find(*it3);
      if(it2!=_groups.end())
        (*it2).second.push_back(fName);
      else
        {
          std::vector<std::string> grps2(1,fName);
          _groups[*it3]=grps2;
        }
    }
}

/*!
 * Returns names of all groups of \a this mesh.
 *  \return std::vector<std::string> - a sequence of group names.
 */
std::vector<std::string> MEDFileMesh::getGroupsNames() const
{
  std::vector<std::string> ret(_groups.size());
  int i=0;
  for(std::map<std::string, std::vector<std::string> >::const_iterator it=_groups.begin();it!=_groups.end();it++,i++)
    ret[i]=(*it).first;
  return ret;
}

/*!
 * Returns names of all families of \a this mesh.
 *  \return std::vector<std::string> - a sequence of family names.
 */
std::vector<std::string> MEDFileMesh::getFamiliesNames() const
{
  std::vector<std::string> ret(_families.size());
  int i=0;
  for(std::map<std::string, mcIdType >::const_iterator it=_families.begin();it!=_families.end();it++,i++)
    ret[i]=(*it).first;
  return ret;
}

/*!
 * Returns names of all families of \a this mesh but like they would be in file.
 * This method is here only for MED file families gurus. If you are a kind user forget this method :-)
 * This method is only useful for aggressive users that want to have in their file a same family lying both on cells and on nodes. This is not a good idea for lisibility !
 * For your information internally in memory such families are renamed to have a nicer API.
 */
std::vector<std::string> MEDFileMesh::getFamiliesNamesWithFilePointOfView() const
{
  std::vector<std::string> ret(getFamiliesNames());
  MEDFileMeshL2::RenameFamiliesFromMemToFile(ret);
  return ret;
}

/*!
 * Returns names of groups that partly or fully appear on the level \a meshDimRelToMaxExt.
 *  \param [in] meshDimRelToMaxExt - a relative dimension of interest.
 *  \return std::vector<std::string> - a sequence of group names at \a meshDimRelToMaxExt
 *          level. 
 */
std::vector<std::string> MEDFileMesh::getGroupsOnSpecifiedLev(int meshDimRelToMaxExt) const
{
  std::vector<std::string> ret;
  std::vector<std::string> allGrps(getGroupsNames());
  const DataArrayIdType *arr=getFamilyFieldAtLevel(meshDimRelToMaxExt);
  if(!arr)
    return ret;
  std::set<mcIdType> famIdsInUse(arr->begin(),arr->end());
  //
  for(auto it : _groups)
  {
    for(auto it2 : it.second)
    {
      auto it3 = _families.find( it2 );
      mcIdType famIdToTest = (*it3).second;
      if( famIdsInUse.find(famIdToTest) != famIdsInUse.end() )
      {
        ret.push_back( it.first );
        break ;
      }
    }
  }
  return ret;
}

/*!
 * Returns all relative mesh levels (including nodes) where a given group is defined.
 *  \param [in] grp - the name of the group of interest.
 *  \return std::vector<mcIdType> - a sequence of the relative dimensions.
 */
std::vector<mcIdType> MEDFileMesh::getGrpNonEmptyLevelsExt(const std::string& grp) const
{
  std::vector<std::string> fams(getFamiliesOnGroup(grp));
  return getFamsNonEmptyLevelsExt(fams);
}

/*!
 * Returns all relative mesh levels (**excluding nodes**) where given groups are defined.
 * To include nodes, call getGrpsNonEmptyLevelsExt() method.
 *  \param [in] grps - a sequence of names of the groups of interest.
 *  \return std::vector<mcIdType> - a sequence of the relative dimensions.
 */
std::vector<mcIdType> MEDFileMesh::getGrpsNonEmptyLevels(const std::vector<std::string>& grps) const
{
  std::vector<std::string> fams(getFamiliesOnGroups(grps));
  return getFamsNonEmptyLevels(fams);
}

/*!
 * Returns all relative mesh levels (including nodes) where given groups are defined.
 *  \param [in] grps - a sequence of names of the groups of interest.
 *  \return std::vector<mcIdType> - a sequence of the relative dimensions.
 */
std::vector<mcIdType> MEDFileMesh::getGrpsNonEmptyLevelsExt(const std::vector<std::string>& grps) const
{
  std::vector<std::string> fams(getFamiliesOnGroups(grps));
  return getFamsNonEmptyLevelsExt(fams);
}

/*!
 * Returns all relative mesh levels (**excluding nodes**) where a given group is defined.
 * To include nodes, call getGrpNonEmptyLevelsExt() method.
 *  \param [in] grp - the name of the group of interest.
 *  \return std::vector<mcIdType> - a sequence of the relative dimensions.
 */
std::vector<mcIdType> MEDFileMesh::getGrpNonEmptyLevels(const std::string& grp) const
{
  std::vector<std::string> fams(getFamiliesOnGroup(grp));
  return getFamsNonEmptyLevels(fams);
}

/*!
 * Returns all relative mesh levels (**excluding nodes**) where a given family is defined.
 * To include nodes, call getFamNonEmptyLevelsExt() method.
 *  \param [in] fam - the name of the family of interest.
 *  \return std::vector<mcIdType> - a sequence of the relative dimensions.
 */
std::vector<mcIdType> MEDFileMesh::getFamNonEmptyLevels(const std::string& fam) const
{
  std::vector<std::string> fams(1,std::string(fam));
  return getFamsNonEmptyLevels(fams);
}

/*!
 * Returns all relative mesh levels (including nodes) where a given family is defined.
 *  \param [in] fam - the name of the family of interest.
 *  \return std::vector<mcIdType> - a sequence of the relative dimensions.
 */
std::vector<mcIdType> MEDFileMesh::getFamNonEmptyLevelsExt(const std::string& fam) const
{
  std::vector<std::string> fams(1,std::string(fam));
  return getFamsNonEmptyLevelsExt(fams);
}

std::string MEDFileMesh::GetMagicFamilyStr()
{
  return std::string(MEDFileMeshL2::ZE_SEP_FOR_FAMILY_KILLERS);
}

/*!
 * Changes a name of every family, included in one group only, to be same as the group name.
 *  \throw If there are families with equal names in \a this mesh.
 */
void MEDFileMesh::assignFamilyNameWithGroupName()
{
  std::map<std::string, std::vector<std::string> > groups(_groups);
  std::map<std::string,mcIdType> newFams;
  for(std::map<std::string,mcIdType>::const_iterator it=_families.begin();it!=_families.end();it++)
    {
      std::vector<std::string> grps=getGroupsOnFamily((*it).first);
      if(grps.size()==1 && groups[grps[0]].size()==1)
        {
          if(newFams.find(grps[0])!=newFams.end())
            {
              std::ostringstream oss; oss << "MEDFileMesh::assignFamilyNameWithGroupName : Family \"" << grps[0] << "\" already exists !";
              throw INTERP_KERNEL::Exception(oss.str().c_str());
            }
          newFams[grps[0]]=(*it).second;
          std::vector<std::string>& grps2=groups[grps[0]];
          std::size_t pos=std::distance(grps2.begin(),std::find(grps2.begin(),grps2.end(),(*it).first));
          grps2[pos]=grps[0];
        }
      else
        {
          if(newFams.find((*it).first)!=newFams.end())
            {
              std::ostringstream oss; oss << "MEDFileMesh::assignFamilyNameWithGroupName : Family \"" << (*it).first << "\" already exists !";
              throw INTERP_KERNEL::Exception(oss.str().c_str());
            }
          newFams[(*it).first]=(*it).second;
        }
    }
  _families=newFams;
  _groups=groups;
}

/*!
 * Removes all groups lying on no family. If there is no empty groups, \a this is let untouched.
 * 
 * \return the removed groups.
 */
std::vector<std::string> MEDFileMesh::removeEmptyGroups()
{
  std::vector<std::string> ret;
  std::map<std::string, std::vector<std::string> > newGrps;
  for(std::map<std::string, std::vector<std::string> >::const_iterator it=_groups.begin();it!=_groups.end();it++)
    {
      if((*it).second.empty())
        ret.push_back((*it).first);
      else
        newGrps[(*it).first]=(*it).second;
    }
  if(!ret.empty())
    _groups=newGrps;
  return ret;
}

void MEDFileMesh::removeGroupAtLevel(int meshDimRelToMaxExt, const std::string& name)
{
  std::map<std::string, std::vector<std::string> >::iterator it(_groups.find(name));
  std::vector<std::string> grps(getGroupsNames());
  if(it==_groups.end())
    {
      std::ostringstream oss; oss << "No such groupname \"" << name << "\" !\nAvailable groups are :";
      std::copy(grps.begin(),grps.end(),std::ostream_iterator<std::string>(oss," "));
      throw INTERP_KERNEL::Exception(oss.str().c_str());
    }
  const std::vector<std::string> &famsOnGrp((*it).second);
  std::vector<mcIdType> famIds(getFamiliesIdsOnGroup(name));
  const DataArrayIdType *famArr(getFamilyFieldAtLevel(meshDimRelToMaxExt));
  if(!famArr)
    return ;
  MCAuto<DataArrayIdType> vals(famArr->getDifferentValues());
  MCAuto<DataArrayIdType> famIds2(DataArrayIdType::NewFromStdVector(famIds));
  MCAuto<DataArrayIdType> idsToKill(famIds2->buildIntersection(vals));
  if(idsToKill->empty())
    return ;
  std::vector<std::string> newFamsOnGrp;
  for(std::vector<std::string>::const_iterator itt=famsOnGrp.begin();itt!=famsOnGrp.end();itt++)
    {
      if(!idsToKill->presenceOfValue(getFamilyId(*itt)))
         newFamsOnGrp.push_back(*itt);
    }
  (*it).second=newFamsOnGrp;
}

/*!
 * Removes a group from \a this mesh.
 *  \param [in] name - the name of the group to remove.
 *  \throw If no group with such a \a name exists.
 */
void MEDFileMesh::removeGroup(const std::string& name)
{
  std::map<std::string, std::vector<std::string> >::iterator it=_groups.find(name);
  std::vector<std::string> grps(getGroupsNames());
  if(it==_groups.end())
    {
      std::ostringstream oss; oss << "No such groupname \"" << name << "\" !\nAvailable groups are :";
      std::copy(grps.begin(),grps.end(),std::ostream_iterator<std::string>(oss," "));
      throw INTERP_KERNEL::Exception(oss.str().c_str());
    }
  _groups.erase(it);
}

/*!
 * Removes a family from \a this mesh.
 *  \param [in] name - the name of the family to remove.
 *  \throw If no family with such a \a name exists.
 */
void MEDFileMesh::removeFamily(const std::string& name)
{
  std::string oname(name);
  std::map<std::string, mcIdType >::iterator it=_families.find(oname);
  std::vector<std::string> fams=getFamiliesNames();
  if(it==_families.end())
    {
      std::ostringstream oss; oss << "No such familyname \"" << name << "\" !\nAvailable families are :";
      std::copy(fams.begin(),fams.end(),std::ostream_iterator<std::string>(oss," "));
      throw INTERP_KERNEL::Exception(oss.str().c_str());
    }
  _families.erase(it);
  for(std::map<std::string, std::vector<std::string> >::iterator it3=_groups.begin();it3!=_groups.end();it3++)
    {
      std::vector<std::string>& v=(*it3).second;
      std::vector<std::string>::iterator it4=std::find(v.begin(),v.end(),oname);
      if(it4!=v.end())
        v.erase(it4);
    }
}

/*!
 * Removes all groups in \a this that are orphan. A group is orphan if this group lies on
 * a set of families, themselves orphan. A family is said orphan if its id appears nowhere in
 * family field whatever its level. This method also suppresses the orphan families.
 * 
 * \return - The list of removed groups names. 
 *
 * \sa MEDFileMesh::removeOrphanFamilies.
 */
std::vector<std::string> MEDFileMesh::removeOrphanGroups()
{
  removeOrphanFamilies();
  return removeEmptyGroups();
}

/*!
 * Removes all families in \a this that are orphan. A family is said orphan if its id appears nowhere in
 * family field whatever its level. Groups are updated in consequence, that is to say all groups lying on orphan family, will see their families list modified.
 * 
 * \return - The list of removed families names.
 * \sa MEDFileMesh::removeOrphanGroups , MEDFileMesh::removeFamiliesReferedByNoGroups
 */
std::vector<std::string> MEDFileMesh::removeOrphanFamilies()
{
  MCAuto<DataArrayIdType> allFamIdsInUse=computeAllFamilyIdsInUse();
  std::vector<std::string> ret;
  if(!((DataArrayIdType*)allFamIdsInUse))
    {
      ret=getFamiliesNames();
      _families.clear(); _groups.clear();
      return ret;
    }
  std::map<std::string,mcIdType> famMap;
  std::map<std::string, std::vector<std::string> > grps(_groups);
  for(std::map<std::string,mcIdType>::const_iterator it=_families.begin();it!=_families.end();it++)
    {
      if(allFamIdsInUse->presenceOfValue((*it).second))
        famMap[(*it).first]=(*it).second;
      else
        {
          ret.push_back((*it).first);
          std::vector<std::string> grpsOnEraseFam=getGroupsOnFamily((*it).first);
          for(std::vector<std::string>::const_iterator it2=grpsOnEraseFam.begin();it2!=grpsOnEraseFam.end();it2++)
            {
              std::map<std::string, std::vector<std::string> >::iterator it3=grps.find(*it2);//it3!=grps.empty() thanks to copy
              std::vector<std::string>& famv=(*it3).second;
              std::vector<std::string>::iterator it4=std::find(famv.begin(),famv.end(),(*it).first);//it4!=famv.end() thanks to copy
              famv.erase(it4);
            }
        }
    }
  if(!ret.empty())
    { _families=famMap; _groups=grps; }
  return ret;
}

/*!
 * This method operates only on maps in \a this. The arrays are not considered here. So this method will remove a family (except "FAMILLE_ZERO" family) if no group lies on it whatever
 * this family is orphan or not.
 *
 * \warning this method is different from removeOrphanFamilies that scans family field array to find orphan families.
 * \sa MEDFileMesh::removeOrphanFamilies
 */
void MEDFileMesh::removeFamiliesReferedByNoGroups()
{
  std::map<std::string,mcIdType> fams;
  std::set<std::string> sfams;
  for(std::map<std::string,mcIdType>::const_iterator it=_families.begin();it!=_families.end();it++)
    sfams.insert((*it).first);
  for(std::map<std::string, std::vector<std::string> >::const_iterator it0=_groups.begin();it0!=_groups.end();it0++)
    for(std::vector<std::string>::const_iterator it1=(*it0).second.begin();it1!=(*it0).second.end();it1++)
      sfams.erase(*it1);
  for(std::set<std::string>::const_iterator it=sfams.begin();it!=sfams.end();it++)
    if(*it!=DFT_FAM_NAME)
      _families.erase(*it);
}

/*!
 * This method has no impact on groups. This method only works on families. This method firstly removes families not referred by any groups in \a this, then all unused entities
 * are put as belonging to family 0 ("FAMILLE_ZERO"). Finally, all orphanFamilies are killed.
 * This method raises an exception if "FAMILLE_ZERO" is already belonging to a group.
 * 
 * This method also raises an exception if a family belonging to a group has also id 0 (which is not right in MED file format). You should never encounter this case using addGroup method.
 *
 * \sa MEDFileMesh::removeOrphanFamilies, MEDFileMesh::zipFamilies
 */
void MEDFileMesh::rearrangeFamilies()
{
  checkOrphanFamilyZero();
  removeFamiliesReferedByNoGroups();
  //
  std::vector<int> levels(getNonEmptyLevelsExt());
  std::set<mcIdType> idsRefed;
  for(std::map<std::string,mcIdType>::const_iterator it=_families.begin();it!=_families.end();it++)
    {
      idsRefed.insert((*it).second);
      if((*it).second==0)
        {
          if(!getGroupsOnFamily((*it).first).empty())
            {
              std::ostringstream oss; oss << "MEDFileMesh::rearrangeFamilies : Not orphan family \"" << (*it).first << "\" has id 0 ! This method may alterate groups in this for such a case !";
              throw INTERP_KERNEL::Exception(oss.str());
            }
        }
    }
  for(std::vector<int>::const_iterator it=levels.begin();it!=levels.end();it++)
    {
      const DataArrayIdType *fams(0);
      try
      {
          fams=getFamilyFieldAtLevel(*it);
      }
      catch(INTERP_KERNEL::Exception& ) { }
      if(!fams)
        continue;
      std::vector<bool> v(fams->getNumberOfTuples(),false);
      for(std::set<mcIdType>::const_iterator pt=idsRefed.begin();pt!=idsRefed.end();pt++)
        fams->switchOnTupleEqualTo(*pt,v);
      MCAuto<DataArrayIdType> unfetchedIds(DataArrayIdType::BuildListOfSwitchedOff(v));
      if(!unfetchedIds->empty())
        {
          MCAuto<DataArrayIdType> newFams(fams->deepCopy());
          newFams->setPartOfValuesSimple3(0,unfetchedIds->begin(),unfetchedIds->end(),0,1,1);
          setFamilyFieldArr(*it,newFams);
        }
    }
  removeOrphanFamilies();
}

/*!
 * This method has no impact on existing groups. This method has only impact on families behind the groups.
 * This method is especially useful for MED file structures having used too much families to define their groups and that need to be merged without modification of their groups.
 * To zip families, firstly this method first removes families refered by no groups (see MEDFileMesh::removeFamiliesReferedByNoGroups), then this method puts together families lying on a same set of groups. If the set of families having same groups has a length higher than 1, the families are merged into a single family
 * having the name of the first family appearing in family definition and with the corresponding family ID.
 */
void MEDFileMesh::zipFamilies()
{
  checkOrphanFamilyZero();
  removeFamiliesReferedByNoGroups();
  std::map< std::set<std::string> , std::vector<std::string> > setOfFamilies;
  // firstly, store in setOfFamilies as key the common set of groups, and as value the families having such same set of groups
  for(auto fam : _families)
    {
      std::vector<std::string> grps( this->getGroupsOnFamily( fam.first ) );
      std::set<std::string> sgrps(grps.begin(),grps.end());
      setOfFamilies[sgrps].push_back(fam.first);
    }
  //
  std::map<std::string, std::vector<std::string> > newGroups(_groups);
  std::map<std::string,mcIdType> newFams(_families);
  std::vector<int> levels(getNonEmptyLevelsExt());
  std::map<mcIdType, std::vector<mcIdType> > famIdsToSubstitute;
  // iterate on all different set of groups
  std::set<std::string> familiesToKill;
  for(auto setOfCommonGrp : setOfFamilies)
    {
      if( setOfCommonGrp.second.size()<=1 )
        continue;
      for(auto fam=setOfCommonGrp.second.begin()+1 ; fam != setOfCommonGrp.second.end() ; fam++)
        familiesToKill.insert(*fam);
    }
  // iterate on all different set of groups
  for(auto setOfCommonGrp : setOfFamilies)
    {
      if( setOfCommonGrp.second.size()<=1 )
        continue;
      std::string newFamName(setOfCommonGrp.second[0]);
      auto newFamID(_families[newFamName]);
      for(auto grpToBeModified : setOfCommonGrp.first)
        {
          std::vector<std::string> newFamiliesForCurGrp(1,newFamName);
          const std::vector<std::string>& familiesOnCurGrp(_groups[grpToBeModified]);
          const std::vector<std::string>& familiesToZip(setOfCommonGrp.second);
          std::for_each(familiesToZip.begin(),familiesToZip.end(),[&famIdsToSubstitute,this,newFamID](const std::string& elt) { famIdsToSubstitute[newFamID].push_back(this->getFamilyId(elt)); });
          // for each family shared by the current group only keep those not sharing setOfCommonGrp.second
          std::for_each(familiesOnCurGrp.begin(),familiesOnCurGrp.end(),[&familiesToKill,&newFamiliesForCurGrp](const std::string& elt)
                        { if( familiesToKill.find(elt) == familiesToKill.end() ) { newFamiliesForCurGrp.push_back(elt); } });
          newGroups[grpToBeModified] = newFamiliesForCurGrp;
        }
      for(auto familyToKill = setOfCommonGrp.second.begin()+1 ; familyToKill != setOfCommonGrp.second.end(); ++familyToKill)
        {
          newFams.erase( newFams.find(*familyToKill) );
        }
      
    }
  // apply modifications in datastructure
  for(auto famIdsSubstSession : famIdsToSubstitute)
    {
      for(std::vector<int>::const_iterator it=levels.begin();it!=levels.end();it++)
        {
          DataArrayIdType *fams(nullptr);
          try
            {
              fams=getFamilyFieldAtLevel(*it);
            }
          catch(INTERP_KERNEL::Exception& ) { }
          if(!fams)
            continue;
          MCAuto<DataArrayIdType> idsToModif(fams->findIdsEqualList(famIdsSubstSession.second.data(),famIdsSubstSession.second.data()+famIdsSubstSession.second.size()));
          fams->setPartOfValuesSimple3(famIdsSubstSession.first,idsToModif->begin(),idsToModif->end(),0,1,1);
        }
    }
  _groups = newGroups;
  _families = newFams;
}

/*!
 * This method only checks that "FAMILLE_ZERO" is orphan (not belonging to a group).
 */
void MEDFileMesh::checkOrphanFamilyZero() const
{
  for(std::map<std::string, std::vector<std::string> >::const_iterator it=_groups.begin();it!=_groups.end();it++)
    {
      if(std::find((*it).second.begin(),(*it).second.end(),DFT_FAM_NAME)!=(*it).second.end())
        {
          std::ostringstream oss; oss << "MEDFileMesh::rearrangeFamilies : Groups \"" << (*it).first << "\" is lying on family \"" << DFT_FAM_NAME << "\" !";
          throw INTERP_KERNEL::Exception(oss.str().c_str());
        }
    }
}

/*!
 * Renames a group in \a this mesh.
 *  \param [in] oldName - a current name of the group to rename.
 *  \param [in] newName - a new group name.
 *  \throw If no group named \a oldName exists in \a this mesh.
 *  \throw If a group named \a newName already exists.
 */
void MEDFileMesh::changeGroupName(const std::string& oldName, const std::string& newName)
{
  std::string oname(oldName);
  std::map<std::string, std::vector<std::string> >::iterator it=_groups.find(oname);
  std::vector<std::string> grps=getGroupsNames();
  if(it==_groups.end())
    {
      std::ostringstream oss; oss << "No such groupname \"" << oldName << "\" !\nAvailable groups are :";
      std::copy(grps.begin(),grps.end(),std::ostream_iterator<std::string>(oss," "));
      throw INTERP_KERNEL::Exception(oss.str().c_str());
    }
  std::string nname(newName);
  std::map<std::string, std::vector<std::string> >::iterator it2=_groups.find(nname);
  if(it2!=_groups.end())
    {
      std::ostringstream oss; oss << "Such groupname \"" << newName << "\" already exists ! Kill it before !";
      throw INTERP_KERNEL::Exception(oss.str().c_str());
    }
  std::vector<std::string> cpy=(*it).second;
  _groups.erase(it);
  _groups[newName]=cpy;
}

/*!
 * Changes an id of a family in \a this mesh. 
 * This method calls changeFamilyIdArr().
 *  \param [in] oldId - a current id of the family.
 *  \param [in] newId - a new family id.
 */
void MEDFileMesh::changeFamilyId(mcIdType oldId, mcIdType newId)
{
  changeFamilyIdArr(oldId,newId);
  std::map<std::string,mcIdType> fam2;
  for(std::map<std::string,mcIdType>::const_iterator it=_families.begin();it!=_families.end();it++)
    {
      if((*it).second==oldId)
        fam2[(*it).first]=newId;
      else
        fam2[(*it).first]=(*it).second;
    }
  _families=fam2;
}

/*!
 * Renames a family in \a this mesh.
 *  \param [in] oldName - a current name of the family to rename.
 *  \param [in] newName - a new family name.
 *  \throw If no family named \a oldName exists in \a this mesh.
 *  \throw If a family named \a newName already exists.
 */
void MEDFileMesh::changeFamilyName(const std::string& oldName, const std::string& newName)
{
  std::string oname(oldName);
  std::map<std::string, mcIdType >::iterator it=_families.find(oname);
  std::vector<std::string> fams=getFamiliesNames();
  if(it==_families.end())
    {
      std::ostringstream oss; oss << "No such familyname \"" << oldName << "\" !\nAvailable families are :";
      std::copy(fams.begin(),fams.end(),std::ostream_iterator<std::string>(oss," "));
      throw INTERP_KERNEL::Exception(oss.str().c_str());
    }
  std::string nname(newName);
  std::map<std::string, mcIdType >::iterator it2=_families.find(nname);
  if(it2!=_families.end())
    {
      std::ostringstream oss; oss << "Such familyname \"" << newName << " already exists ! Kill it before !";
      throw INTERP_KERNEL::Exception(oss.str().c_str());
    }
  mcIdType cpy=(*it).second;
  _families.erase(it);
  _families[newName]=cpy;
  for(std::map<std::string, std::vector<std::string> >::iterator it3=_groups.begin();it3!=_groups.end();it3++)
    {
      std::vector<std::string>& v=(*it3).second;
      std::vector<std::string>::iterator it4=std::find(v.begin(),v.end(),oname);
      if(it4!=v.end())
        (*it4)=nname;
    }
}

/*!
 * Checks if \a this and another mesh contains the same families.
 *  \param [in] other - the mesh to compare with \a this one.
 *  \param [in,out] what - an unused parameter.
 *  \return bool - \c true if number of families and their ids are the same in the two
 *          meshes. Families with the id == \c 0 are not considered.
 */
bool MEDFileMesh::areFamsEqual(const MEDFileMesh *other, std::string& what) const
{
  if(_families==other->_families)
    return true;
  std::map<std::string,mcIdType> fam0;
  std::map<std::string,mcIdType> fam1;
  for(std::map<std::string,mcIdType>::const_iterator it=_families.begin();it!=_families.end();it++)
    if((*it).second!=0)
      fam0[(*it).first]=(*it).second;
  for(std::map<std::string,mcIdType>::const_iterator it=other->_families.begin();it!=other->_families.end();it++)
    if((*it).second!=0)
      fam1[(*it).first]=(*it).second;
  return fam0==fam1;
}

/*!
 * Checks if \a this and another mesh contains the same groups.
 *  \param [in] other - the mesh to compare with \a this one.
 *  \param [in,out] what - a string describing a difference of groups of the two meshes
 *          in case if this method returns \c false.
 *  \return bool - \c true if number of groups and families constituting them are the
 *          same in the two meshes.
 */
bool MEDFileMesh::areGrpsEqual(const MEDFileMesh *other, std::string& what) const
{
  if(_groups==other->_groups)
    return true;
  bool ret=true;
  std::size_t sz=_groups.size();
  if(sz!=other->_groups.size())
    {
      what="Groups differ because not same number !\n";
      ret=false;
    }
  if(ret)
    {
      std::map<std::string, std::vector<std::string> >::const_iterator it1=_groups.begin();
      for(std::size_t i=0;i<sz && ret;i++,it1++)
        {
          std::map<std::string, std::vector<std::string> >::const_iterator it2=other->_groups.find((*it1).first);
          if(it2!=other->_groups.end())
            {
              std::set<std::string> s1((*it1).second.begin(),(*it1).second.end());
              std::set<std::string> s2((*it2).second.begin(),(*it2).second.end());
              ret=(s1==s2);
            }
          else
            {
              ret=false;
              what="A group in first mesh exists not in other !\n";
            }
        }
    }
  if(!ret)
    {
      std::ostringstream oss; oss << "Groups description differs :\n";
      oss << "First group description :\n";
      for(std::map<std::string, std::vector<std::string> >::const_iterator it=_groups.begin();it!=_groups.end();it++)
        {
          oss << " Group \"" << (*it).first << "\" on following families :\n";
          for(std::vector<std::string>::const_iterator it2=(*it).second.begin();it2!=(*it).second.end();it2++)
            oss << "    \"" << *it2 << "\n";
        }
      oss << "Second group description :\n";
      for(std::map<std::string, std::vector<std::string> >::const_iterator it=other->_groups.begin();it!=other->_groups.end();it++)
        {
          oss << " Group \"" << (*it).first << "\" on following families :\n";
          for(std::vector<std::string>::const_iterator it2=(*it).second.begin();it2!=(*it).second.end();it2++)
            oss << "    \"" << *it2 << "\n";
        }
      what+=oss.str();
    }
  return ret;
}

/*!
 * Checks if a group with a given name exists in \a this mesh.
 *  \param [in] groupName - the group name.
 *  \return bool - \c true the group \a groupName exists in \a this mesh.
 */
bool MEDFileMesh::existsGroup(const std::string& groupName) const
{
  std::string grpName(groupName);
  return _groups.find(grpName)!=_groups.end();
}

/*!
 * Checks if a family with a given id exists in \a this mesh.
 *  \param [in] famId - the family id.
 *  \return bool - \c true the family with the id \a famId exists in \a this mesh.
 */
bool MEDFileMesh::existsFamily(mcIdType famId) const
{
  for(std::map<std::string,mcIdType>::const_iterator it2=_families.begin();it2!=_families.end();it2++)
    if((*it2).second==famId)
      return true;
  return false;
}

/*!
 * Checks if a family with a given name exists in \a this mesh.
 *  \param [in] familyName - the family name.
 *  \return bool - \c true the family \a familyName exists in \a this mesh.
 */
bool MEDFileMesh::existsFamily(const std::string& familyName) const
{
  std::string fname(familyName);
  return _families.find(fname)!=_families.end();
}

/*!
 * Sets an id of a family.
 *  \param [in] familyName - the family name.
 *  \param [in] id - a new id of the family.
 */
void MEDFileMesh::setFamilyId(const std::string& familyName, mcIdType id)
{
  std::string fname(familyName);
  _families[fname]=id;
}

void MEDFileMesh::setFamilyIdUnique(const std::string& familyName, mcIdType id)
{
  std::string fname(familyName);
  for(std::map<std::string,mcIdType>::const_iterator it=_families.begin();it!=_families.end();it++)
    if((*it).second==id)
      {
        if((*it).first!=familyName)
          {
            std::ostringstream oss; oss << "MEDFileMesh::setFamilyIdUnique : Family id #" << id << " is already belonging to family with name \"" << (*it).first << "\" !";
            throw INTERP_KERNEL::Exception(oss.str().c_str());
          }
      }
  _families[fname]=id;
}

/*!
 * Adds a family to \a this mesh.
 *  \param [in] familyName - a name of the family.
 *  \param [in] famId - an id of the family.
 *  \throw If a family with the same name or id already exists in \a this mesh.
 */
void MEDFileMesh::addFamily(const std::string& familyName, mcIdType famId)
{
  std::string fname(familyName);
  std::map<std::string,mcIdType>::const_iterator it=_families.find(fname);
  if(it==_families.end())
    {
      for(std::map<std::string,mcIdType>::const_iterator it2=_families.begin();it2!=_families.end();it2++)
        if((*it2).second==famId)
          {
            std::ostringstream oss;
            oss << "MEDFileMesh::addFamily : Family \"" << (*it2).first << "\" already exists with specified id : " << famId << " !";
            throw INTERP_KERNEL::Exception(oss.str().c_str());
          }
      _families[fname]=famId;
    }
  else
    {
      if((*it).second!=famId)
        {
          std::ostringstream oss;
          oss << "MEDFileMesh::addFamily : Family \"" << fname << "\" already exists but has id set to " << (*it).second << " different from asked famId " << famId << " !";
          throw INTERP_KERNEL::Exception(oss.str().c_str());
        }
    }
}

/*!
 * Creates a group including all mesh entities of given dimension.
 * \warning This method does \b not guarantee that the created group includes mesh
 * entities of only \a meshDimRelToMaxExt dimension in the case if some family id is
 * present in family fields of different dimensions. To assure this, call
 * ensureDifferentFamIdsPerLevel() \b before calling this method.
 *  \param [in] meshDimRelToMaxExt - a relative dimension of mesh entities to include to
 *          the group.
 *  \param [in] groupName - a name of the new group.
 *  \throw If a group named \a groupName already exists.
 *  \throw If no mesh entities of dimension \a meshDimRelToMaxExt exist in \a this mesh.
 *  \throw If no family field of dimension \a meshDimRelToMaxExt is present in \a this mesh.
 */
void MEDFileMesh::createGroupOnAll(int meshDimRelToMaxExt, const std::string& groupName)
{
  std::string grpName(groupName);
  std::vector<int> levs=getNonEmptyLevelsExt();
  if(std::find(levs.begin(),levs.end(),meshDimRelToMaxExt)==levs.end())
    {
      std::ostringstream oss; oss << "MEDFileMesh::createGroupOnAll : The relative ext dimension " << meshDimRelToMaxExt << " is not available !" << std::endl;
      oss << "Available relative ext levels are : ";
      std::copy(levs.begin(),levs.end(),std::ostream_iterator<int>(oss," "));
      throw INTERP_KERNEL::Exception(oss.str().c_str());
    }
  if(existsGroup(groupName))
    {
      std::ostringstream oss; oss << "MEDFileMesh::createGroupOnAll : The groups \"" << grpName << "\" already exists in this !" << std::endl;
      oss << "Already existing groups are : ";
      std::copy(levs.begin(),levs.end(),std::ostream_iterator<int>(oss," "));
      oss << std::endl << "Please choose an another group name or call removeGroup(\"" << grpName << "\") method !";
      throw INTERP_KERNEL::Exception(oss.str().c_str());
    }
  const DataArrayIdType *fieldFamIds=getFamilyFieldAtLevel(meshDimRelToMaxExt);
  if(fieldFamIds==0)
    throw INTERP_KERNEL::Exception("MEDFileMesh::createGroupOnAll : Family field arr ids is not defined for this level !");
  MCAuto<DataArrayIdType> famIds=fieldFamIds->getDifferentValues();
  std::vector<std::string> familiesOnWholeGroup;
  for(const mcIdType *it=famIds->begin();it!=famIds->end();it++)
    {
      bool tmp;
      familiesOnWholeGroup.push_back(findOrCreateAndGiveFamilyWithId(*it,tmp));
    }
  _groups[grpName]=familiesOnWholeGroup;
}

/*!
 * Ensures that given family ids do not present in family fields of dimensions different
 * than given ones. If a family id is present in the family fields of dimensions different
 * than the given ones, a new family is created and the whole data is updated accordingly.
 *  \param [in] famIds - a sequence of family ids to check.
 *  \param [in] vMeshDimRelToMaxExt - a sequence of relative dimensions to which the \a
 *          famIds should exclusively belong.
 *  \return bool - \c true if no modification is done in \a this mesh by this method.
 */
bool MEDFileMesh::keepFamIdsOnlyOnLevs(const std::vector<mcIdType>& famIds, const std::vector<int>& vMeshDimRelToMaxExt)
{
  std::set<int> levsInput(vMeshDimRelToMaxExt.begin(),vMeshDimRelToMaxExt.end());
  std::vector<int> levs=getNonEmptyLevelsExt();
  std::set<int> levs2(levs.begin(),levs.end());
  std::vector<int> levsToTest;
  std::set_difference(levs2.begin(),levs2.end(),levsInput.begin(),levsInput.end(),std::back_insert_iterator< std::vector<int> >(levsToTest));
  std::set<mcIdType> famIds2(famIds.begin(),famIds.end());
  bool ret=true;
  mcIdType maxFamId=1;
  if(!_families.empty())
    maxFamId=getMaxFamilyId()+1;
  std::vector<std::string> allFams=getFamiliesNames();
  for(std::vector<int>::const_iterator it=levsToTest.begin();it!=levsToTest.end();it++)
    {
      const DataArrayIdType *fieldFamIds=getFamilyFieldAtLevel(*it);
      if(fieldFamIds)
        {
          MCAuto<DataArrayIdType> famIds3=fieldFamIds->getDifferentValues();
          std::vector<mcIdType> tmp;
          std::set_intersection(famIds3->begin(),famIds3->end(),famIds2.begin(),famIds2.end(),std::back_insert_iterator< std::vector<mcIdType> >(tmp));
          for(std::vector<mcIdType>::const_iterator it2=tmp.begin();it2!=tmp.end();it2++)
            {
              ret=false;
              std::string famName=getFamilyNameGivenId(*it2);
              std::ostringstream oss; oss << "Family_" << maxFamId;
              std::string zeName=CreateNameNotIn(oss.str(),allFams);
              addFamilyOnAllGroupsHaving(famName,zeName);
              _families[zeName]=maxFamId;
              (const_cast<DataArrayIdType *>(fieldFamIds))->changeValue(*it2,maxFamId);
              maxFamId++;
            }
        }
    }
  return ret;
}

/*!
 * Adds a family to a given group in \a this mesh. If the group with a given name does
 * not exist, it is created.
 *  \param [in] grpName - the name of the group to add the family in.
 *  \param [in] famName - the name of the family to add to the group named \a grpName.
 *  \throw If \a grpName or \a famName is an empty string.
 *  \throw If no family named \a famName is present in \a this mesh.
 */
void MEDFileMesh::addFamilyOnGrp(const std::string& grpName, const std::string& famName)
{
  std::string grpn(grpName);
  std::string famn(famName);
  if(grpn.empty() || famn.empty())
    throw INTERP_KERNEL::Exception("MEDFileMesh::addFamilyOnGrp : input strings must be non null !");
  std::vector<std::string> fams=getFamiliesNames();
  if(std::find(fams.begin(),fams.end(),famn)==fams.end())
    {
      std::ostringstream oss; oss << "MEDFileMesh::addFamilyOnGrp : Family \"" << famn << "\" does not exist !" << std::endl;
      oss << "Create this family or choose an existing one ! Existing fams are : ";
      std::copy(fams.begin(),fams.end(),std::ostream_iterator<std::string>(oss," ")); oss << ".";
      throw INTERP_KERNEL::Exception(oss.str().c_str());
    }
  std::map<std::string, std::vector<std::string> >::iterator it=_groups.find(grpn);
  if(it==_groups.end())
    {
      _groups[grpn].push_back(famn);
    }
  else
    {
      std::vector<std::string>::iterator it2=std::find((*it).second.begin(),(*it).second.end(),famn);
      if(it2==(*it).second.end())
        (*it).second.push_back(famn);
    }
}

/*!
 * This method adds to all groups lying on family with name 'famName' the other family name 'otherFamName'.
 * This method is quite underground because it can lead to unconsistency because family 'otherFamName' is \b not added into _families.
 * This method is used by MEDFileMesh::keepFamIdsOnlyOnLevs method.
 */
void MEDFileMesh::addFamilyOnAllGroupsHaving(const std::string& famName, const std::string& otherFamName)
{
  std::string famNameCpp(famName);
  std::string otherCpp(otherFamName);
  for(std::map<std::string, std::vector<std::string> >::iterator it=_groups.begin();it!=_groups.end();it++)
    {
      std::vector<std::string>& v=(*it).second;
      if(std::find(v.begin(),v.end(),famNameCpp)!=v.end())
        {
          v.push_back(otherCpp);
        }
    }
}

void MEDFileMesh::checkNoGroupClash(const DataArrayIdType *famArr, const std::string& grpName) const
{
  std::vector<std::string> grpsNames(getGroupsNames());
  if(std::find(grpsNames.begin(),grpsNames.end(),grpName)==grpsNames.end())
    return ;
  std::vector<mcIdType> famIds(getFamiliesIdsOnGroup(grpName));
  if(famArr->presenceOfValue(famIds))
    {
      std::ostringstream oss; oss << "MEDFileUMesh::addGroup : Group with name \"" << grpName << "\" already exists at specified level ! Destroy it before calling this method !";
      throw INTERP_KERNEL::Exception(oss.str().c_str());
    }
}

/*!
 * \param [in] ids ids and group name of the new group to add. The ids should be sorted and different each other (MED file norm).
 * \param [in,out] famArr family array on level of interest to be renumbered. The input pointer should be not \c NULL (no check of that will be performed)
 */
void MEDFileMesh::addGroupUnderground(bool isNodeGroup, const DataArrayIdType *ids, DataArrayIdType *famArr)
{
  if(!ids)
    throw INTERP_KERNEL::Exception("MEDFileUMesh::addGroup : NULL pointer in input !");
  std::string grpName(ids->getName());
  if(grpName.empty())
    throw INTERP_KERNEL::Exception("MEDFileUMesh::addGroup : empty group name ! MED file format do not accept empty group name !");
  ids->checkStrictlyMonotonic(true);
  checkNoGroupClash(famArr,grpName);
  MCAuto<DataArrayIdType> famArrTmp; famArrTmp.takeRef(famArr);
  std::list< MCAuto<DataArrayIdType> > allFamIds(getAllNonNullFamilyIds());
  allFamIds.erase(std::find(allFamIds.begin(),allFamIds.end(),famArrTmp));
  MCAuto<DataArrayIdType> famIds=famArr->selectByTupleIdSafe(ids->begin(),ids->end());
  MCAuto<DataArrayIdType> diffFamIds=famIds->getDifferentValues();
  std::vector<mcIdType> familyIds;
  std::vector< MCAuto<DataArrayIdType> > idsPerfamiliyIds;
  mcIdType maxVal=getTheMaxAbsFamilyId()+1;
  std::map<std::string,mcIdType> families(_families);
  std::map<std::string, std::vector<std::string> > groups(_groups);
  std::vector<std::string> fams;
  bool created(false);
  for(const mcIdType *famId=diffFamIds->begin();famId!=diffFamIds->end();famId++)
    {
      MCAuto<DataArrayIdType> ids2Tmp=famIds->findIdsEqual(*famId);
      MCAuto<DataArrayIdType> ids2=ids->selectByTupleId(ids2Tmp->begin(),ids2Tmp->end());
      MCAuto<DataArrayIdType> ids1=famArr->findIdsEqual(*famId);
      MCAuto<DataArrayIdType> ret0(ids1->buildSubstractionOptimized(ids2));
      if(ret0->empty())
        {
          bool isFamPresent=false;
          for(std::list< MCAuto<DataArrayIdType> >::const_iterator itl=allFamIds.begin();itl!=allFamIds.end() && !isFamPresent;itl++)
            isFamPresent=(*itl)->presenceOfValue(*famId);
          if(!isFamPresent && *famId!=0)
            { familyIds.push_back(*famId); idsPerfamiliyIds.push_back(ret0); fams.push_back(FindOrCreateAndGiveFamilyWithId(families,*famId,created)); } // adding *famId in grp
          else
            {
              familyIds.push_back(isNodeGroup?maxVal:-maxVal); idsPerfamiliyIds.push_back(ids2);
              std::string locFamName=FindOrCreateAndGiveFamilyWithId(families,isNodeGroup?maxVal:-maxVal,created);
              fams.push_back(locFamName);
              if(existsFamily(*famId))
                {
                  std::string locFamName2=getFamilyNameGivenId(*famId); std::vector<std::string> v(2); v[0]=locFamName2; v[1]=locFamName;
                  ChangeAllGroupsContainingFamily(groups,getFamilyNameGivenId(*famId),v);
                }
              maxVal++;
            } // modifying all other groups on *famId to lie on maxVal and lie the grp on maxVal
        }
      else
        {
          familyIds.push_back(isNodeGroup?maxVal:-maxVal); idsPerfamiliyIds.push_back(ret0); // modifying all other groups on *famId to lie on maxVal and on maxVal+1
          familyIds.push_back(isNodeGroup?maxVal+1:-maxVal-1); idsPerfamiliyIds.push_back(ids2);//grp lie only on maxVal+1
          std::string n2(FindOrCreateAndGiveFamilyWithId(families,isNodeGroup?maxVal+1:-maxVal-1,created)); fams.push_back(n2);
          if(existsFamily(*famId))
            {
              std::string n1(FindOrCreateAndGiveFamilyWithId(families,isNodeGroup?maxVal:-maxVal,created)); std::vector<std::string> v(2); v[0]=n1; v[1]=n2;
              ChangeAllGroupsContainingFamily(groups,getFamilyNameGivenId(*famId),v);
            }
          maxVal+=2;
        }
    }
  for(std::size_t i=0;i<familyIds.size();i++)
    {
      DataArrayIdType *da=idsPerfamiliyIds[i];
      famArr->setPartOfValuesSimple3(familyIds[i],da->begin(),da->end(),0,1,1);
    }
  _families=families;
  std::map<std::string, std::vector<std::string> >::iterator itt(groups.find(grpName));
  if(itt!=groups.end())
    {
      std::vector<std::string>& famsOnGrp((*itt).second);
      famsOnGrp.insert(famsOnGrp.end(),fams.begin(),fams.end());
    }
  else
    groups[grpName]=fams;
  _groups=groups;
}

void MEDFileMesh::changeAllGroupsContainingFamily(const std::string& familyNameToChange, const std::vector<std::string>& newFamiliesNames)
{
  ChangeAllGroupsContainingFamily(_groups,familyNameToChange,newFamiliesNames);
}

void MEDFileMesh::ChangeAllGroupsContainingFamily(std::map<std::string, std::vector<std::string> >& groups, const std::string& familyNameToChange, const std::vector<std::string>& newFamiliesNames)
{
  std::string fam(familyNameToChange);
  for(std::map<std::string, std::vector<std::string> >::iterator it=groups.begin();it!=groups.end();it++)
    {
      std::vector<std::string>& fams((*it).second);
      std::vector<std::string>::iterator it2=std::find(fams.begin(),fams.end(),fam);
      if(it2!=fams.end())
        {
          fams.erase(it2);
          fams.insert(fams.end(),newFamiliesNames.begin(),newFamiliesNames.end());
        }
    }
}

/*!
 * Returns a name of the family having a given id or, if no such a family exists, creates
 * a new uniquely named family and returns its name.
 *  \param [in] id - the id of the family whose name is required.
 *  \param [out] created - returns \c true if the new family has been created, \c false, else.
 *  \return std::string - the name of the existing or the created family.
 *  \throw If it is not possible to create a unique family name.
 */
std::string MEDFileMesh::findOrCreateAndGiveFamilyWithId(mcIdType id, bool& created)
{
  return FindOrCreateAndGiveFamilyWithId(_families,id,created);
}

/*!
 * If it exists a family whose family id is equal to 'id' this method behaves as MEDFileMesh::getFamilyNameGivenId.
 * In this case, 'this' internal states remains unchanged and 'created' out parameter will be set to false.
 * If there is no family whose family id is equal to 'id' a family is created with a name different from those
 * already existing. In this case 'created' will be returned with a value set to true, and internal state
 * will be modified.
 * This method will throws an exception if it is not possible to create a unique family name.
 */
std::string MEDFileMesh::FindOrCreateAndGiveFamilyWithId(std::map<std::string,mcIdType>& families, mcIdType id, bool& created)
{
  std::vector<std::string> famAlreadyExisting(families.size());
  int ii=0;
  for(std::map<std::string,mcIdType>::const_iterator it=families.begin();it!=families.end();it++,ii++)
    {
      if((*it).second!=id)
        {
          famAlreadyExisting[ii]=(*it).first;
        }
      else
        {
          created=false;
          return (*it).first;
        }
    }
  created=true;
  std::ostringstream oss; oss << "Family_" << id;
  std::string ret=CreateNameNotIn(oss.str(),famAlreadyExisting);
  families[ret]=id;
  return ret;
}

/*!
 * Sets names and ids of all families in \a this mesh.
 *  \param [in] info - a map of a family name to a family id.
 */
void MEDFileMesh::setFamilyInfo(const std::map<std::string,mcIdType>& info)
{
  _families=info;
}

/*!
 * Sets names of all groups and families constituting them in \a this mesh.
 *  \param [in] info - a map of a group name to a vector of names of families
 *          constituting the group.
 */
void MEDFileMesh::setGroupInfo(const std::map<std::string, std::vector<std::string> >&info)
{
  _groups=info;
}

/*!
 * Returns an id of the family having a given name.
 *  \param [in] name - the name of the family of interest.
 *  \return mcIdType - the id of the family of interest.
 *  \throw If no family with such a \a name exists.
 */
mcIdType MEDFileMesh::getFamilyId(const std::string& name) const
{
  std::map<std::string, mcIdType>::const_iterator it=_families.find(name);
  if(it==_families.end())
    {
      std::vector<std::string> fams(getFamiliesNames());
      std::ostringstream oss; oss << "No such familyname \"" << name << "\" !\nAvailable families are :";
      std::copy(fams.begin(),fams.end(),std::ostream_iterator<std::string>(oss," "));
      throw INTERP_KERNEL::Exception(oss.str().c_str());
    }
  return (*it).second;
}

/*!
 * Returns ids of the families having given names.
 *  \param [in] fams - a sequence of the names of families of interest.
 *  \return std::vector<mcIdType> - a sequence of the ids of families of interest.
 *  \throw If \a fams contains a name of an inexistent family.
 */
std::vector<mcIdType> MEDFileMesh::getFamiliesIds(const std::vector<std::string>& fams) const
{
  std::vector<mcIdType> ret(fams.size());
  int i=0;
  for(std::vector<std::string>::const_iterator it=fams.begin();it!=fams.end();it++,i++)
    {
      std::map<std::string, mcIdType>::const_iterator it2=_families.find(*it);
      if(it2==_families.end())
        {
          std::vector<std::string> fams2=getFamiliesNames();
          std::ostringstream oss; oss << "No such familyname \"" << *it << "\" in input list !\nAvailable families are :";
          std::copy(fams2.begin(),fams2.end(),std::ostream_iterator<std::string>(oss," "));
          throw INTERP_KERNEL::Exception(oss.str().c_str());
        }
      ret[i]=(*it2).second;
    }
  return ret;
}

/*!
 * Returns a maximal abs(id) of families in \a this mesh.
 *  \return mcIdType - the maximal norm of family id.
 *  \throw If there are no families in \a this mesh.
 */
mcIdType MEDFileMesh::getMaxAbsFamilyId() const
{
  if(_families.empty())
    throw INTERP_KERNEL::Exception("MEDFileMesh::getMaxFamilyId : no families set !");
  mcIdType ret=-std::numeric_limits<mcIdType>::max();
  for(std::map<std::string,mcIdType>::const_iterator it=_families.begin();it!=_families.end();it++)
    {
      ret=std::max(std::abs((*it).second),ret);
    }
  return ret;
}

/*!
 * Returns a maximal id of families in \a this mesh.
 *  \return mcIdType - the maximal family id.
 *  \throw If there are no families in \a this mesh.
 */
mcIdType MEDFileMesh::getMaxFamilyId() const
{
  if(_families.empty())
    throw INTERP_KERNEL::Exception("MEDFileMesh::getMaxFamilyId : no families set !");
  mcIdType ret=-std::numeric_limits<mcIdType>::max();
  for(std::map<std::string,mcIdType>::const_iterator it=_families.begin();it!=_families.end();it++)
    {
      ret=std::max((*it).second,ret);
    }
  return ret;
}

/*!
 * Returns a minimal id of families in \a this mesh.
 *  \return mcIdType - the minimal family id.
 *  \throw If there are no families in \a this mesh.
 */
mcIdType MEDFileMesh::getMinFamilyId() const
{
  if(_families.empty())
    throw INTERP_KERNEL::Exception("MEDFileMesh::getMinFamilyId : no families set !");
  mcIdType ret=std::numeric_limits<mcIdType>::max();
  for(std::map<std::string,mcIdType>::const_iterator it=_families.begin();it!=_families.end();it++)
    {
      ret=std::min((*it).second,ret);
    }
  return ret;
}

/*!
 * Returns a maximal id of families in \a this mesh. Not only named families are
 * considered but all family fields as well.
 *  \return mcIdType - the maximal family id.
 */
mcIdType MEDFileMesh::getTheMaxAbsFamilyId() const
{
  mcIdType m1=-std::numeric_limits<mcIdType>::max();
  for(std::map<std::string,mcIdType>::const_iterator it=_families.begin();it!=_families.end();it++)
    m1=std::max(std::abs((*it).second),m1);
  mcIdType m2=getMaxAbsFamilyIdInArrays();
  return std::max(m1,m2);
}

/*!
 * Returns a maximal id of families in \a this mesh. Not only named families are
 * considered but all family fields as well.
 *  \return mcIdType - the maximal family id.
 */
mcIdType MEDFileMesh::getTheMaxFamilyId() const
{
  mcIdType m1=-std::numeric_limits<mcIdType>::max();
  for(std::map<std::string,mcIdType>::const_iterator it=_families.begin();it!=_families.end();it++)
    m1=std::max((*it).second,m1);
  mcIdType m2=getMaxFamilyIdInArrays();
  return std::max(m1,m2);
}

/*!
 * Returns a minimal id of families in \a this mesh. Not only named families are
 * considered but all family fields as well.
 *  \return mcIdType - the minimal family id.
 */
mcIdType MEDFileMesh::getTheMinFamilyId() const
{
  mcIdType m1=std::numeric_limits<mcIdType>::max();
  for(std::map<std::string,mcIdType>::const_iterator it=_families.begin();it!=_families.end();it++)
    m1=std::min((*it).second,m1);
  mcIdType m2=getMinFamilyIdInArrays();
  return std::min(m1,m2);
}

/*!
 * This method only considers the maps. The contain of family array is ignored here.
 * 
 * \sa MEDFileMesh::computeAllFamilyIdsInUse
 */
DataArrayIdType *MEDFileMesh::getAllFamiliesIdsReferenced() const
{
  MCAuto<DataArrayIdType> ret=DataArrayIdType::New();
  std::set<mcIdType> v;
  for(std::map<std::string,mcIdType>::const_iterator it=_families.begin();it!=_families.end();it++)
    v.insert((*it).second);
  ret->alloc((mcIdType)v.size(),1);
  std::copy(v.begin(),v.end(),ret->getPointer());
  return ret.retn();
}

/*!
 * This method does not consider map of family name, family id. Only family field array on different levels is considered.
 * 
 * \sa MEDFileMesh::getAllFamiliesIdsReferenced
 */
DataArrayIdType *MEDFileMesh::computeAllFamilyIdsInUse() const
{
  std::vector<int> famLevs=getFamArrNonEmptyLevelsExt();
  MCAuto<DataArrayIdType> ret;
  for(std::vector<int>::const_iterator it=famLevs.begin();it!=famLevs.end();it++)
    {
      const DataArrayIdType *arr=getFamilyFieldAtLevel(*it);//arr not null due to spec of getFamArrNonEmptyLevelsExt
      MCAuto<DataArrayIdType> dv=arr->getDifferentValues();
      if((DataArrayIdType *) ret)
        ret=dv->buildUnion(ret);
      else
        ret=dv;
    }
  return ret.retn();
}

/*!
 * true is returned if no modification has been needed. false if family
 * renumbering has been needed.       
 */
bool MEDFileMesh::ensureDifferentFamIdsPerLevel()
{
  std::vector<int> levs=getNonEmptyLevelsExt();
  std::set<mcIdType> allFamIds;
  mcIdType maxId=getMaxFamilyId()+1;
  std::map<int,std::vector<mcIdType> > famIdsToRenum;
  for(std::vector<int>::const_iterator it=levs.begin();it!=levs.end();it++)
    {
      const DataArrayIdType *fam=getFamilyFieldAtLevel(*it);
      if(fam)
        {
          MCAuto<DataArrayIdType> tmp=fam->getDifferentValues();
          std::set<mcIdType> r2;
          std::set_intersection(tmp->begin(),tmp->end(),allFamIds.begin(),allFamIds.end(),std::inserter(r2,r2.end()));
          if(!r2.empty())
            famIdsToRenum[*it].insert(famIdsToRenum[*it].end(),r2.begin(),r2.end());
          std::set<mcIdType> r3;
          std::set_union(tmp->begin(),tmp->end(),allFamIds.begin(),allFamIds.end(),std::inserter(r3,r3.end()));
        }
    }
  if(famIdsToRenum.empty())
    return true;
  MCAuto<DataArrayIdType> allIds=getAllFamiliesIdsReferenced();
  for(std::map<int,std::vector<mcIdType> >::const_iterator it2=famIdsToRenum.begin();it2!=famIdsToRenum.end();it2++)
    {
      DataArrayIdType *fam=const_cast<DataArrayIdType *>(getFamilyFieldAtLevel((*it2).first));
      mcIdType *famIdsToChange=fam->getPointer();
      std::map<mcIdType,mcIdType> ren;
      for(std::vector<mcIdType>::const_iterator it3=(*it2).second.begin();it3!=(*it2).second.end();it3++,maxId++)
        {
          if(allIds->presenceOfValue(*it3))
            {
              std::string famName=getFamilyNameGivenId(*it3);
              std::vector<std::string> grps=getGroupsOnFamily(famName);
              ren[*it3]=maxId;
              bool dummy;
              std::string newFam=findOrCreateAndGiveFamilyWithId(maxId,dummy);
              for(std::vector<std::string>::const_iterator it4=grps.begin();it4!=grps.end();it4++)
                addFamilyOnGrp((*it4),newFam);
            }
        }
      MCAuto<DataArrayIdType> ids=fam->findIdsEqualList(&(*it2).second[0],&(*it2).second[0]+(*it2).second.size());
      for(const mcIdType *id=ids->begin();id!=ids->end();id++)
        famIdsToChange[*id]=ren[famIdsToChange[*id]];
    }
  return false;
}

/*!
 * This method normalizes fam id with the policy explained underneath. This policy is close to those implemented in SMESH.
 * Level #0 famids > 0, Level #-1 famids < 0, Level #-2 famids=0, Level #1 famids=0
 * This policy is those used by SMESH and Trio and that is the opposite of those in MED file.
 * This method will throw an exception if a same family id is detected in different level.
 * \warning This policy is the opposite of those in MED file documentation ...
 */
void MEDFileMesh::normalizeFamIdsTrio()
{
  ensureDifferentFamIdsPerLevel();
  MCAuto<DataArrayIdType> allIds=getAllFamiliesIdsReferenced();
  std::vector<int> levs=getNonEmptyLevelsExt();
  std::set<int> levsS(levs.begin(),levs.end());
  std::set<std::string> famsFetched;
  std::map<std::string,mcIdType> families;
  if(std::find(levs.begin(),levs.end(),0)!=levs.end())
    {
      levsS.erase(0);
      const DataArrayIdType *fam=getFamilyFieldAtLevel(0);
      if(fam)
        {
          mcIdType refId=1;
          MCAuto<DataArrayIdType> tmp=fam->getDifferentValues();
          std::map<mcIdType,mcIdType> ren;
          for(const mcIdType *it=tmp->begin();it!=tmp->end();it++,refId++)
            ren[*it]=refId;
          mcIdType nbOfTuples=fam->getNumberOfTuples();
          mcIdType *start=const_cast<DataArrayIdType *>(fam)->getPointer();
          for(mcIdType *w=start;w!=start+nbOfTuples;w++)
            *w=ren[*w];
          for(const mcIdType *it=tmp->begin();it!=tmp->end();it++)
            {
              if(allIds->presenceOfValue(*it))
                {
                  std::string famName=getFamilyNameGivenId(*it);
                  families[famName]=ren[*it];
                  famsFetched.insert(famName);
                }
            }
        }
    }
  if(std::find(levs.begin(),levs.end(),-1)!=levs.end())
    {
      levsS.erase(-1);
      const DataArrayIdType *fam=getFamilyFieldAtLevel(-1);
      if(fam)
        {
          mcIdType refId=-1;
          MCAuto<DataArrayIdType> tmp=fam->getDifferentValues();
          std::map<mcIdType,mcIdType> ren;
          for(const mcIdType *it=tmp->begin();it!=tmp->end();it++,refId--)
            ren[*it]=refId;
          mcIdType nbOfTuples=fam->getNumberOfTuples();
          mcIdType *start=const_cast<DataArrayIdType *>(fam)->getPointer();
          for(mcIdType *w=start;w!=start+nbOfTuples;w++)
            *w=ren[*w];
          for(const mcIdType *it=tmp->begin();it!=tmp->end();it++)
            {
              if(allIds->presenceOfValue(*it))
                {
                  std::string famName=getFamilyNameGivenId(*it);
                  families[famName]=ren[*it];
                  famsFetched.insert(famName);
                }
            }
        }
    }
  for(std::set<int>::const_iterator it2=levsS.begin();it2!=levsS.end();it2++)
    {
      DataArrayIdType *fam=const_cast<DataArrayIdType*>(getFamilyFieldAtLevel(*it2));
      if(fam)
        {
          MCAuto<DataArrayIdType> tmp=fam->getDifferentValues();
          fam->fillWithZero();
          for(const mcIdType *it3=tmp->begin();it3!=tmp->end();it3++)
            if(allIds->presenceOfValue(*it3))
              {
                std::string famName=getFamilyNameGivenId(*it3);
                families[famName]=0;
                famsFetched.insert(famName);
              }
        }
    }
  //
  std::vector<std::string> allFams=getFamiliesNames();
  std::set<std::string> allFamsS(allFams.begin(),allFams.end());
  std::set<std::string> unFetchedIds;
  std::set_difference(allFamsS.begin(),allFamsS.end(),famsFetched.begin(),famsFetched.end(),std::inserter(unFetchedIds,unFetchedIds.end()));
  for(std::set<std::string>::const_iterator it4=unFetchedIds.begin();it4!=unFetchedIds.end();it4++)
    families[*it4]=_families[*it4];
  _families=families;
}

/*!
 * This method normalizes fam id with the following policy.
 * Level #0 famids < 0, Level #-1 famids < 0 and for Level #1 famids >= 0
 * This policy is those defined in the MED file format but is the opposite of those implemented in SMESH and Trio.
 * This method will throw an exception if a same family id is detected in different level.
 */
void MEDFileMesh::normalizeFamIdsMEDFile()
{
  ensureDifferentFamIdsPerLevel();
  MCAuto<DataArrayIdType> allIds=getAllFamiliesIdsReferenced();
  std::vector<int> levs=getNonEmptyLevelsExt();
  std::set<int> levsS(levs.begin(),levs.end());
  std::set<std::string> famsFetched;
  std::map<std::string,mcIdType> families;
  mcIdType refId=1;
  if(std::find(levs.begin(),levs.end(),1)!=levs.end())
    {
      levsS.erase(1);
      const DataArrayIdType *fam=getFamilyFieldAtLevel(1);
      if(fam)
        {
          MCAuto<DataArrayIdType> tmp=fam->getDifferentValues();
          std::map<mcIdType,mcIdType> ren;
          for(const mcIdType *it=tmp->begin();it!=tmp->end();it++,refId++)
            ren[*it]=refId;
          mcIdType nbOfTuples=fam->getNumberOfTuples();
          mcIdType *start=const_cast<DataArrayIdType *>(fam)->getPointer();
          for(mcIdType *w=start;w!=start+nbOfTuples;w++)
            *w=ren[*w];
          for(const mcIdType *it=tmp->begin();it!=tmp->end();it++)
            {
              if(allIds->presenceOfValue(*it))
                {
                  std::string famName=getFamilyNameGivenId(*it);
                  families[famName]=ren[*it];
                  famsFetched.insert(famName);
                }
            }
        }
    }
  refId=-1;
  for(std::set<int>::const_reverse_iterator it2=levsS.rbegin();it2!=levsS.rend();it2++)
    {
      const DataArrayIdType *fam=getFamilyFieldAtLevel(*it2);
      if(fam)
        {
          MCAuto<DataArrayIdType> tmp=fam->getDifferentValues();
          std::map<mcIdType,mcIdType> ren;
          for(const mcIdType *it=tmp->begin();it!=tmp->end();it++,refId--)
            ren[*it]=refId;
          mcIdType nbOfTuples=fam->getNumberOfTuples();
          mcIdType *start=const_cast<DataArrayIdType *>(fam)->getPointer();
          for(mcIdType *w=start;w!=start+nbOfTuples;w++)
            *w=ren[*w];
          for(const mcIdType *it=tmp->begin();it!=tmp->end();it++)
            {
              if(allIds->presenceOfValue(*it))
                {
                  std::string famName=getFamilyNameGivenId(*it);
                  families[famName]=ren[*it];
                  famsFetched.insert(famName);
                }
            }
        }
    }
  //
  std::vector<std::string> allFams=getFamiliesNames();
  std::set<std::string> allFamsS(allFams.begin(),allFams.end());
  std::set<std::string> unFetchedIds;
  std::set_difference(allFamsS.begin(),allFamsS.end(),famsFetched.begin(),famsFetched.end(),std::inserter(unFetchedIds,unFetchedIds.end()));
  for(std::set<std::string>::const_iterator it4=unFetchedIds.begin();it4!=unFetchedIds.end();it4++)
    families[*it4]=_families[*it4];
  _families=families;
}

/*!
 * Returns a name of the family by its id. If there are several families having the given
 * id, the name first in lexical order is returned.
 *  \param [in] id - the id of the family whose name is required.
 *  \return std::string - the name of the found family.
 *  \throw If no family with the given \a id exists.
 */
std::string MEDFileMesh::getFamilyNameGivenId(mcIdType id) const
{
  for(std::map<std::string,mcIdType>::const_iterator it=_families.begin();it!=_families.end();it++)
    if((*it).second==id)
      return (*it).first;
  std::ostringstream oss; oss << "MEDFileUMesh::getFamilyNameGivenId : no such family id : " << id;
  throw INTERP_KERNEL::Exception(oss.str().c_str());
}

/*!
 * Returns a string describing \a this mesh. This description includes the mesh name and
 * the mesh description string.
 *  \return std::string - the mesh information string.
 */
std::string MEDFileMesh::simpleRepr() const
{
  std::ostringstream oss;
  oss << "(*************************************)\n(* GENERAL INFORMATION ON THE MESH : *)\n(*************************************)\n";
  oss << "- Name of the mesh : <<" << getName() << ">>\n";
  oss << "- Description associated to the mesh : " << getDescription() << std::endl;
  return oss.str();
}

/*!
 * This method is nearly like getFamilyFieldAtLevel method. Except that if the array does not exist at the specified level \a meshDimRelToMaxExt
 * an empty one is created.
 */
DataArrayIdType *MEDFileMesh::getOrCreateAndGetFamilyFieldAtLevel(int meshDimRelToMaxExt)
{
  DataArrayIdType *ret(getFamilyFieldAtLevel(meshDimRelToMaxExt));
  if(ret)
    return ret;
  MCAuto<DataArrayIdType> arr(DataArrayIdType::New());
  arr->alloc(getSizeAtLevel(meshDimRelToMaxExt),1);
  arr->fillWithZero();
  setFamilyFieldArr(meshDimRelToMaxExt,arr);
  return getFamilyFieldAtLevel(meshDimRelToMaxExt);
}

/*!
 * Returns ids of mesh entities contained in a given group of a given dimension.
 *  \param [in] meshDimRelToMaxExt - a relative dimension of the mesh entities whose ids
 *          are required.
 *  \param [in] grp - the name of the group of interest.
 *  \param [in] renum - if \c true, the optional numbers of entities, if available, are
 *          returned instead of ids. 
 *  \return DataArrayIdType * - a new instance of DataArrayIdType holding either ids or
 *          numbers, if available and required, of mesh entities of the group. The caller
 *          is to delete this array using decrRef() as it is no more needed. 
 *  \throw If the name of a nonexistent group is specified.
 *  \throw If the family field is missing for \a meshDimRelToMaxExt.
 */
DataArrayIdType *MEDFileMesh::getGroupArr(int meshDimRelToMaxExt, const std::string& grp, bool renum) const
{
  std::vector<std::string> tmp(1);
  tmp[0]=grp;
  DataArrayIdType *ret=getGroupsArr(meshDimRelToMaxExt,tmp,renum);
  ret->setName(grp);
  return ret;
}

/*!
 * Returns ids of mesh entities contained in given groups of a given dimension.
 *  \param [in] meshDimRelToMaxExt - a relative dimension of the mesh entities whose ids
 *          are required.
 *  \param [in] grps - the names of the groups of interest.
 *  \param [in] renum - if \c true, the optional numbers of entities, if available, are
 *          returned instead of ids.
 *  \return DataArrayIdType * - a new instance of DataArrayIdType holding either ids or
 *          numbers, if available and required, of mesh entities of the groups. The caller
 *          is to delete this array using decrRef() as it is no more needed. 
 *  \throw If the name of a nonexistent group is present in \a grps.
 *  \throw If the family field is missing for \a meshDimRelToMaxExt.
 */
DataArrayIdType *MEDFileMesh::getGroupsArr(int meshDimRelToMaxExt, const std::vector<std::string>& grps, bool renum) const
{
  std::vector<std::string> fams2=getFamiliesOnGroups(grps);
  return getFamiliesArr(meshDimRelToMaxExt,fams2,renum);
}

/*!
 * Returns ids of mesh entities contained in a given family of a given dimension.
 *  \param [in] meshDimRelToMaxExt - a relative dimension of the mesh entities whose ids
 *          are required.
 *  \param [in] fam - the name of the family of interest.
 *  \param [in] renum - if \c true, the optional numbers of entities, if available, are
 *          returned instead of ids. 
 *  \return DataArrayIdType * - a new instance of DataArrayIdType holding either ids or
 *          numbers, if available and required, of mesh entities of the family. The caller
 *          is to delete this array using decrRef() as it is no more needed. 
 *  \throw If the family field is missing for \a meshDimRelToMaxExt.
 */
DataArrayIdType *MEDFileMesh::getFamilyArr(int meshDimRelToMaxExt, const std::string& fam, bool renum) const
{
  std::vector<std::string> tmp(1);
  tmp[0]=fam;
  DataArrayIdType *ret=getFamiliesArr(meshDimRelToMaxExt,tmp,renum);
  ret->setName(fam);
  return ret;
}

/*!
 * Returns ids of nodes contained in a given group.
 *  \param [in] grp - the name of the group of interest.
 *  \param [in] renum - if \c true, the optional numbers of nodes, if available, are
 *          returned instead of ids. 
 *  \return DataArrayIdType * - a new instance of DataArrayIdType holding either ids or
 *          numbers, if available and required, of nodes of the group. The caller
 *          is to delete this array using decrRef() as it is no more needed. 
 *  \throw If the name of a nonexistent group is specified.
 *  \throw If the family field is missing for nodes.
 */
DataArrayIdType *MEDFileMesh::getNodeGroupArr(const std::string& grp, bool renum) const
{
  std::vector<std::string> tmp(1);
  tmp[0]=grp;
  DataArrayIdType *ret=getNodeGroupsArr(tmp,renum);
  ret->setName(grp);
  return ret;
}

/*!
 * Returns ids of nodes contained in given groups.
 *  \param [in] grps - the names of the groups of interest.
 *  \param [in] renum - if \c true, the optional numbers of nodes, if available, are
 *          returned instead of ids. 
 *  \return DataArrayIdType * - a new instance of DataArrayIdType holding either ids or
 *          numbers, if available and required, of nodes of the groups. The caller
 *          is to delete this array using decrRef() as it is no more needed. 
 *  \throw If the name of a nonexistent group is present in \a grps.
 *  \throw If the family field is missing for nodes.
 */
DataArrayIdType *MEDFileMesh::getNodeGroupsArr(const std::vector<std::string>& grps, bool renum) const
{
  return getGroupsArr(1,grps,renum);
}

/*!
 * Returns ids of nodes contained in a given family.
 *  \param [in] fam - the name of the family of interest.
 *  \param [in] renum - if \c true, the optional numbers of nodes, if available, are
 *          returned instead of ids. 
 *  \return DataArrayIdType * - a new instance of DataArrayIdType holding either ids or
 *          numbers, if available and required, of nodes of the family. The caller
 *          is to delete this array using decrRef() as it is no more needed. 
 *  \throw If the name of a nonexistent family is specified.
 *  \throw If the family field is missing for nodes.
 */
DataArrayIdType *MEDFileMesh::getNodeFamilyArr(const std::string& fam, bool renum) const
{
  std::vector<std::string> tmp(1);
  tmp[0]=fam;
  DataArrayIdType *ret=getNodeFamiliesArr(tmp,renum);
  ret->setName(fam);
  return ret;
}

/*!
 * Returns ids of nodes contained in given families.
 *  \param [in] fams - the names of the families of interest.
 *  \param [in] renum - if \c true, the optional numbers of nodes, if available, are
 *          returned instead of ids. 
 *  \return DataArrayIdType * - a new instance of DataArrayIdType holding either ids or
 *          numbers, if available and required, of nodes of the families. The caller
 *          is to delete this array using decrRef() as it is no more needed. 
 *  \throw If the family field is missing for nodes.
 */
DataArrayIdType *MEDFileMesh::getNodeFamiliesArr(const std::vector<std::string>& fams, bool renum) const
{
  return getFamiliesArr(1,fams,renum);
}

/*!
 * Adds groups of given dimension and creates corresponding families and family fields
 * given ids of mesh entities of each group.
 *  \param [in] meshDimRelToMaxExt - the relative mesh dimension of given mesh entities.
 *  \param [in] grps - a sequence of arrays of ids each describing a group.
 *  \param [in] renum - \c true means that \a grps contains not ids but optional numbers
 *          of mesh entities.
 *  \throw If names of some groups in \a grps are equal.
 *  \throw If \a grps includes a group with an empty name.
 *  \throw If \a grps includes invalid ids (or numbers if \a renum == \c true ).
 *  \throw If there are no mesh entities of \a meshDimRelToMaxExt dimension in \a this mesh.
 */
void MEDFileMesh::setGroupsAtLevel(int meshDimRelToMaxExt, const std::vector<const DataArrayIdType *>& grps, bool renum)
{
  if(grps.empty())
    return ;
  std::set<std::string> grpsName;
  std::vector<std::string> grpsName2(grps.size());
  int i=0;

  for(std::vector<const DataArrayIdType *>::const_iterator it=grps.begin();it!=grps.end();it++,i++)
    {
      grpsName.insert((*it)->getName());
      grpsName2[i]=(*it)->getName();
    }
  if(grpsName.size()!=grps.size())
    throw INTERP_KERNEL::Exception("MEDFileUMesh::setGroupsAtLevel : groups name must be different each other !");
  if(grpsName.find(std::string(""))!=grpsName.end())
    throw INTERP_KERNEL::Exception("MEDFileUMesh::setGroupsAtLevel : groups name must be different empty string !");
  mcIdType sz=getSizeAtLevel(meshDimRelToMaxExt);
  MCAuto<DataArrayIdType> fam;
  std::vector< std::vector<mcIdType> > fidsOfGroups;
  if(!renum)
    {
      fam=DataArrayIdType::MakePartition(grps,sz,fidsOfGroups);
    }
  else
    {
      std::vector< MCAuto<DataArrayIdType> > grps2(grps.size());
      for(unsigned int ii=0;ii<grps.size();ii++)
        {
          grps2[ii]=MEDFileUMeshSplitL1::Renumber(getRevNumberFieldAtLevel(meshDimRelToMaxExt),grps[ii]);
          grps2[ii]->setName(grps[ii]->getName());
        }
      std::vector<const DataArrayIdType *> grps3(grps2.begin(),grps2.end());
      fam=DataArrayIdType::MakePartition(grps3,sz,fidsOfGroups);
    }
  mcIdType offset=1;
  if(!_families.empty())
    offset=getMaxAbsFamilyId()+1;
  TranslateFamilyIds(meshDimRelToMaxExt==1?offset:-offset,fam,fidsOfGroups);
  MCAuto<DataArrayIdType> ids=fam->getDifferentValues();
  appendFamilyEntries(ids,fidsOfGroups,grpsName2);
  setFamilyFieldArr(meshDimRelToMaxExt,fam);
}

/*!
 * This method append into '_families' attribute the families whose ids are in 'famIds'. Warning 'famIds' are expected to be ids
 * not in '_families'. Groups information are given in parameters in order to give to families representative names.
 * For the moment, the two last input parameters are not taken into account.
 */
void MEDFileMesh::appendFamilyEntries(const DataArrayIdType *famIds, const std::vector< std::vector<mcIdType> >& fidsOfGrps, const std::vector<std::string>& grpNames)
{
  std::map<mcIdType,std::string> famInv;
  for(const mcIdType *it=famIds->begin();it!=famIds->end();it++)
    {
      std::ostringstream oss;
      oss << "Family_" << (*it);
      _families[oss.str()]=(*it);
      famInv[*it]=oss.str();
    }
  int i=0;
  for(std::vector< std::vector<mcIdType> >::const_iterator it1=fidsOfGrps.begin();it1!=fidsOfGrps.end();it1++,i++)
    {
      for(std::vector<mcIdType>::const_iterator it2=(*it1).begin();it2!=(*it1).end();it2++)
        {
          _groups[grpNames[i]].push_back(famInv[*it2]);
        }
    }
}

std::vector<INTERP_KERNEL::NormalizedCellType> MEDFileMesh::getAllGeoTypes() const
{
  std::vector<int> levs(getNonEmptyLevels());
  std::vector<INTERP_KERNEL::NormalizedCellType> ret;
  for(std::vector<int>::const_iterator it=levs.begin();it!=levs.end();it++)
    {
      std::vector<INTERP_KERNEL::NormalizedCellType> elts(getGeoTypesAtLevel(*it));
      ret.insert(ret.end(),elts.begin(),elts.end());
    }
  return ret;
}

/*!
 * \sa getAllDistributionOfTypes
 */
std::vector<mcIdType> MEDFileMesh::getDistributionOfTypes(int meshDimRelToMax) const
{
  MCAuto<MEDCouplingMesh> mLev(getMeshAtLevel(meshDimRelToMax));
  return mLev->getDistributionOfTypes();
}

void MEDFileMesh::loadLLWithAdditionalItems(med_idt fid, const std::string& mName, int dt, int it, MEDFileMeshReadSelector *mrs)
{
  loadLL(fid,mName,dt,it,mrs);
  loadJointsFromFile(fid);
  loadEquivalences(fid);
}

void MEDFileMesh::TranslateFamilyIds(mcIdType offset, DataArrayIdType *famArr, std::vector< std::vector<mcIdType> >& famIdsPerGrp)
{
  famArr->applyLin(offset>0?1:-1,offset,0);
  for(std::vector< std::vector<mcIdType> >::iterator it1=famIdsPerGrp.begin();it1!=famIdsPerGrp.end();it1++)
    {
      if(offset<0)
        std::transform((*it1).begin(),(*it1).end(),(*it1).begin(),std::negate<mcIdType>());
      std::transform((*it1).begin(),(*it1).end(),(*it1).begin(),std::bind(std::plus<mcIdType>(),std::placeholders::_1,offset));
    }
}

/*!
 * Warning no check is done on 'nameTry' in parameter. It should be non empty.
 * This method returns a name close to 'nameTry' so that it is not already into 'namesToAvoid'.
 * If this method fails to find such a name it will throw an exception.
 */
std::string MEDFileMesh::CreateNameNotIn(const std::string& nameTry, const std::vector<std::string>& namesToAvoid)
{
  //attempt #0
  if(std::find(namesToAvoid.begin(),namesToAvoid.end(),nameTry)==namesToAvoid.end())
    return nameTry;
  //attempt #1
  std::size_t len=nameTry.length();
  for(std::size_t ii=1;ii<len;ii++)
    {
      std::string tmp=nameTry.substr(ii,len-ii);
      if(std::find(namesToAvoid.begin(),namesToAvoid.end(),tmp)==namesToAvoid.end())
        return tmp;
    }
  //attempt #2
  if(len>=1)
    {
      for(char i=1;i<30;i++)
        {
          std::string tmp1(nameTry.at(0),i);
          tmp1+=nameTry;
          if(std::find(namesToAvoid.begin(),namesToAvoid.end(),tmp1)==namesToAvoid.end())
            return tmp1;
        }
    }
  //attempt #3
  std::string tmp2;
  for(std::vector<std::string>::const_iterator it2=namesToAvoid.begin();it2!=namesToAvoid.end();it2++)
    tmp2+=(*it2);
  if(std::find(namesToAvoid.begin(),namesToAvoid.end(),tmp2)==namesToAvoid.end())
    return tmp2;
  throw INTERP_KERNEL::Exception("MEDFileMesh::CreateNameNotIn : impossible to find a not already used name !");
}

mcIdType MEDFileMesh::PutInThirdComponentOfCodeOffset(std::vector<mcIdType>& code, mcIdType strt)
{
  std::size_t nbOfChunks=code.size()/3;
  if(code.size()%3!=0)
    throw INTERP_KERNEL::Exception("MEDFileMesh::PutInThirdComponentOfCodeOffset : code has invalid size : should be of size 3*x !");
  mcIdType ret=strt;
  for(std::size_t i=0;i<nbOfChunks;i++)
    {
      code[3*i+2]=ret;
      ret+=code[3*i+1];
    }
  return ret;
}

/*!
 * This method should be called by any set* method of subclasses to deal automatically with _name attribute.
 * If _name attribute is empty the name of 'm' if taken as _name attribute.
 * If _name is not empty and that 'm' has the same name nothing is done.
 * If _name is not emplt and that 'm' has \b NOT the same name an exception is thrown.
 */
void MEDFileMesh::dealWithTinyInfo(const MEDCouplingMesh *m)
{
  if(!m)
    throw INTERP_KERNEL::Exception("MEDFileMesh::dealWithTinyInfo : input mesh in NULL !");
  if(_name.empty())
    _name=m->getName();
  else
    {
      std::string name(m->getName());
      if(!name.empty())
        {
          if(_name!=name)
            {
              std::ostringstream oss; oss << "MEDFileMesh::dealWithTinyInfo : name of current MEDfile mesh is '" << _name << "' whereas name of input mesh is : '";
              oss << name << "' ! Names must match !";
              throw INTERP_KERNEL::Exception(oss.str().c_str());
            }
        }
    }
  if(_desc_name.empty())
    _desc_name=m->getDescription();
  else
    {
      std::string name(m->getDescription());
      if(!name.empty())
        {
          if(_desc_name!=name)
            {
              std::ostringstream oss; oss << "MEDFileMesh::dealWithTinyInfo : description of current MEDfile mesh is '" << _desc_name << "' whereas name of input mesh is : '";
              oss << name << "' ! Names must match !";
              throw INTERP_KERNEL::Exception(oss.str().c_str());
            }
        }
    }
}

void MEDFileMesh::getFamilyRepr(std::ostream& oss) const
{
  oss << "(**************************)\n(* FAMILIES OF THE MESH : *)\n(**************************)\n";
  for(std::map<std::string,mcIdType>::const_iterator it=_families.begin();it!=_families.end();it++)
    {
      oss << "- Family with name \"" << (*it).first << "\" with number " << (*it).second << std::endl;
      oss << "  - Groups lying on this family : ";
      std::vector<std::string> grps=getGroupsOnFamily((*it).first);
      std::copy(grps.begin(),grps.end(),std::ostream_iterator<std::string>(oss," "));
      oss << std::endl << std::endl;
    }
}

/*!
 * Returns a new MEDFileUMesh holding the mesh data that has been read from a given MED
 * file. The mesh to load is specified by its name and numbers of a time step and an
 * iteration.
 *  \param [in] fileName - the name of MED file to read.
 *  \param [in] mName - the name of the mesh to read.
 *  \param [in] dt - the number of a time step.
 *  \param [in] it - the number of an iteration.
 *  \return MEDFileUMesh * - a new instance of MEDFileUMesh. The caller is to delete this
 *          mesh using decrRef() as it is no more needed. 
 *  \throw If the file is not readable.
 *  \throw If there is no mesh with given attributes in the file.
 *  \throw If the mesh in the file is not an unstructured one.
 */
MEDFileUMesh *MEDFileUMesh::New(const std::string& fileName, const std::string& mName, int dt, int it, MEDFileMeshReadSelector *mrs)
{
  MEDFileUtilities::AutoFid fid(OpenMEDFileForRead(fileName));
  return New(fid,mName,dt,it,mrs);
}

MEDFileUMesh *MEDFileUMesh::New(med_idt fid, const std::string& mName, int dt, int it, MEDFileMeshReadSelector *mrs)
{
  return new MEDFileUMesh(fid,mName,dt,it,mrs);
}

/*!
 * Returns a new MEDFileUMesh holding the mesh data that has been read from a given MED
 * file. The first mesh in the file is loaded.
 *  \param [in] fileName - the name of MED file to read.
 *  \return MEDFileUMesh * - a new instance of MEDFileUMesh. The caller is to delete this
 *          mesh using decrRef() as it is no more needed. 
 *  \throw If the file is not readable.
 *  \throw If there is no meshes in the file.
 *  \throw If the mesh in the file is not an unstructured one.
 */
MEDFileUMesh *MEDFileUMesh::New(const std::string& fileName, MEDFileMeshReadSelector *mrs)
{
  MEDFileUtilities::AutoFid fid(OpenMEDFileForRead(fileName));
  return New(fid,mrs);
}

template<class T>
T *NewForTheFirstMeshInFile(med_idt fid, MEDFileMeshReadSelector *mrs)
{
  std::vector<std::string> ms(MEDLoaderNS::getMeshNamesFid(fid));
  if(ms.empty())
    {
      std::ostringstream oss; oss << MLMeshTraits<T>::ClassName << "::New : no meshes in file \"" << MEDFileWritable::FileNameFromFID(fid) << "\" !";
      throw INTERP_KERNEL::Exception(oss.str().c_str());
    }
  int dt,it;
  MEDCoupling::MEDCouplingMeshType meshType;
  std::string dummy2;
  MEDCoupling::MEDCouplingAxisType dummy3;
  MEDFileMeshL2::GetMeshIdFromName(fid,ms.front(),meshType,dummy3,dt,it,dummy2);
  return T::New(fid,ms.front(),dt,it,mrs);
}

MEDFileUMesh *MEDFileUMesh::New(med_idt fid, MEDFileMeshReadSelector *mrs)
{
  return NewForTheFirstMeshInFile<MEDFileUMesh>(fid,mrs);
}

/*!
 * \b WARNING this implementation is dependent from MEDCouplingMappedExtrudedMesh::buildUnstructured !
 * \sa MEDCouplingMappedExtrudedMesh::buildUnstructured , MEDCouplingMappedExtrudedMesh::build3DUnstructuredMesh
 */
MEDFileUMesh *MEDFileUMesh::New(const MEDCouplingMappedExtrudedMesh *mem)
{
  if(!mem)
    throw INTERP_KERNEL::Exception("MEDFileUMesh::New : null input vector !");
  MCAuto<MEDFileUMesh> ret(MEDFileUMesh::New());
  MCAuto<MEDCouplingUMesh> m3D(mem->buildUnstructured());
  MCAuto<MEDCouplingUMesh> m2D(mem->getMesh2D()->deepCopy());
  m2D->zipCoords();
  m2D->setCoords(m3D->getCoords());
  ret->setMeshAtLevel(0,m3D);
  ret->setMeshAtLevel(-1,m2D);
  ret->setFamilyId(GetSpeStr4ExtMesh(),std::numeric_limits<med_int>::max()-mem->get2DCellIdForExtrusion());
  return ret.retn();
}

/*!
 * Returns an empty instance of MEDFileUMesh.
 *  \return MEDFileUMesh * - a new instance of MEDFileUMesh. The caller is to delete this
 *          mesh using decrRef() as it is no more needed. 
 */
MEDFileUMesh *MEDFileUMesh::New()
{
  return new MEDFileUMesh;
}

/*!
 * This method loads from file with name \a fileName the mesh called \a mName as New does. The difference is that
 * here only a part of cells contained in the file will be loaded. The selection of cell is specified using the two consecutive parameters
 * \a types and \a slicPerTyp. This method allows to load from a mesh (typically huge) in a MED file a part of cells of that mesh.
 * The part of cells is specified using triplet (start,stop,step) for each geometric type. Only nodes lying on selected cells will be loaded to reduce
 * at most the memory consumtion.
 *
 * \param [in] fileName - the name of the file.
 * \param [in] mName - the name of the mesh to be read.
 * \param [in] types - the list of the geo types of which some part will be taken. A geometric type in \a types must appear only once at most.
 * \param [in] slicPerTyp - an array of size 3 times larger than \a types that specifies for each type in \a types (in the same order) resp the start, the stop and the step.
 * \param [in] dt - the iteration, that is to say the first element of the pair that locates the asked time step.
 * \param [in] it - the order, that is to say the second element of the pair that locates the asked time step.
 * \param [in] mrs - the request for what to be loaded.
 * \return MEDFileUMesh * - a new instance of MEDFileUMesh. The caller is to delete this mesh using decrRef() as it is no more needed.
 */
MEDFileUMesh *MEDFileUMesh::LoadPartOf(const std::string& fileName, const std::string& mName, const std::vector<INTERP_KERNEL::NormalizedCellType>& types, const std::vector<mcIdType>& slicPerTyp, int dt, int it, MEDFileMeshReadSelector *mrs)
{
  MEDFileUtilities::CheckFileForRead(fileName);
  MEDFileUtilities::AutoFid fid(MEDfileOpen(fileName.c_str(),MED_ACC_RDONLY));
  return MEDFileUMesh::LoadPartOf(fid,mName,types,slicPerTyp,dt,it,mrs);
}

/*!
 * Please refer to the other MEDFileUMesh::LoadPartOf method that has the same semantic and the same parameter (excepted the first).
 * This method is \b NOT wrapped into python.
 */
MEDFileUMesh *MEDFileUMesh::LoadPartOf(med_idt fid, const std::string& mName, const std::vector<INTERP_KERNEL::NormalizedCellType>& types, const std::vector<mcIdType>& slicPerTyp, int dt, int it, MEDFileMeshReadSelector *mrs)
{
  MCAuto<MEDFileUMesh> ret(MEDFileUMesh::New());
  ret->loadPartUMeshFromFile(fid,mName,types,slicPerTyp,dt,it,mrs);
  return ret.retn();
}

/*!
 * This method is an helper to load only consecutive nodes chunk of data of MED file pointed by \a fileName.
 * Consecutive chunk is specified classicaly by start (included) stop (excluded) format with \a startNodeId and \a stopNodeId respectively.
 * This method returns 5 elements.
 * 
 * \param [in] fileName - Name of file nodes to be read of.
 * \param [in] mName - Name of the mesh inside file pointed be \a fileName nodes to be read of.
 * \param [in] dt - Time iteration inside file pointed be \a fileName nodes to be read of.
 * \param [in] it - Time order inside file pointed be \a fileName nodes to be read of.
 * \param [in] infosOnComp - Components info of nodes to be read of. The size of string vector should be equal to space dimension of mesh to be read.
 * \param [in] startNodeId - Start Node Id (included) of chunk of data to be read
 * \param [in] stopNodeId - Start Node Id (included) of chunk of data to be read
 * \param [out] coords - output coordinates of requested chunk (DataArrayDouble)
 * \param [out] partCoords - output PartDefinition object of chunk
 * \param [out] famCoords - output family id field of requested chunk (DataArrayIdType)
 * \param [out] numCoords - output num id field of requested chunk (DataArrayIdType)
 * \param [out] nameCoords - output names on nodes of requested chunk (DataArrayAsciiChar)
 * 
 * \sa MEDLoaderUMesh::LoadPartOf
 */
void MEDFileUMesh::LoadPartCoords(const std::string& fileName, const std::string& mName, int dt, int it, const std::vector<std::string>& infosOnComp, mcIdType startNodeId, mcIdType stopNodeId,
MCAuto<DataArrayDouble>& coords, MCAuto<PartDefinition>& partCoords, MCAuto<DataArrayIdType>& famCoords, MCAuto<DataArrayIdType>& numCoords, MCAuto<DataArrayAsciiChar>& nameCoords)
{
  MEDFileUtilities::AutoFid fid(OpenMEDFileForRead(fileName));
  MEDFileUMeshL2::LoadPartCoords(fid,infosOnComp,mName,dt,it,startNodeId,stopNodeId,coords,partCoords,famCoords,numCoords,nameCoords);
}

std::size_t MEDFileUMesh::getHeapMemorySizeWithoutChildren() const
{
  std::size_t ret(MEDFileMesh::getHeapMemorySizeWithoutChildren());
  ret+=_ms.capacity()*(sizeof(MCAuto<MEDFileUMeshSplitL1>))+_elt_str.capacity()*sizeof(MCAuto<MEDFileEltStruct4Mesh>);
  return ret;
}

std::vector<const BigMemoryObject *> MEDFileUMesh::getDirectChildrenWithNull() const
{
  std::vector<const BigMemoryObject *> ret(MEDFileMesh::getDirectChildrenWithNull());
  ret.push_back((const DataArrayDouble*)_coords);
  ret.push_back((const DataArrayIdType *)_fam_coords);
  ret.push_back((const DataArrayIdType *)_num_coords);
  ret.push_back((const DataArrayIdType *)_global_num_coords);
  ret.push_back((const DataArrayIdType *)_rev_num_coords);
  ret.push_back((const DataArrayAsciiChar *)_name_coords);
  ret.push_back((const PartDefinition *)_part_coords);
  for(std::vector< MCAuto<MEDFileUMeshSplitL1> >::const_iterator it=_ms.begin();it!=_ms.end();it++)
    ret.push_back((const MEDFileUMeshSplitL1*) *it);
  for(std::vector< MCAuto<MEDFileEltStruct4Mesh> >::const_iterator it=_elt_str.begin();it!=_elt_str.end();it++)
    ret.push_back((const MEDFileEltStruct4Mesh *)*it);
  return ret;
}

MEDFileUMesh *MEDFileUMesh::shallowCpy() const
{
  MCAuto<MEDFileUMesh> ret(new MEDFileUMesh(*this));
  return ret.retn();
}

MEDFileMesh *MEDFileUMesh::createNewEmpty() const
{
  return new MEDFileUMesh;
}

MEDFileUMesh *MEDFileUMesh::deepCopy() const
{
  MCAuto<MEDFileUMesh> ret(new MEDFileUMesh(*this));
  ret->deepCpyEquivalences(*this);
  if(_coords.isNotNull())
    ret->_coords=_coords->deepCopy();
  if(_fam_coords.isNotNull())
    ret->_fam_coords=_fam_coords->deepCopy();
  if(_num_coords.isNotNull())
    ret->_num_coords=_num_coords->deepCopy();
  if(_global_num_coords.isNotNull())
    ret->_global_num_coords=_global_num_coords->deepCopy();
  if(_rev_num_coords.isNotNull())
    ret->_rev_num_coords=_rev_num_coords->deepCopy();
  if(_name_coords.isNotNull())
    ret->_name_coords=_name_coords->deepCopy();
  std::size_t i=0;
  for(std::vector< MCAuto<MEDFileUMeshSplitL1> >::const_iterator it=_ms.begin();it!=_ms.end();it++,i++)
    {
      if((const MEDFileUMeshSplitL1 *)(*it))
        ret->_ms[i]=(*it)->deepCopy(ret->_coords);
    }
  if((const PartDefinition*)_part_coords)
    ret->_part_coords=_part_coords->deepCopy();
  return ret.retn();
}

/*!
 * Checks if \a this and another mesh are equal.
 *  \param [in] other - the mesh to compare with.
 *  \param [in] eps - a precision used to compare real values.
 *  \param [in,out] what - the string returning description of unequal data.
 *  \return bool - \c true if the meshes are equal, \c false, else.
 */
bool MEDFileUMesh::isEqual(const MEDFileMesh *other, double eps, std::string& what) const
{
  if(!MEDFileMesh::isEqual(other,eps,what))
    return false;
  const MEDFileUMesh *otherC=dynamic_cast<const MEDFileUMesh *>(other);
  if(!otherC)
    {
      what="Mesh types differ ! This is unstructured and other is NOT !";
      return false;
    }
  clearNonDiscrAttributes();
  otherC->clearNonDiscrAttributes();
  const DataArrayDouble *coo1=_coords;
  const DataArrayDouble *coo2=otherC->_coords;
  if((coo1==0 && coo2!=0) || (coo1!=0 && coo2==0))
    {
      what="Mismatch of coordinates ! One is defined and not other !";
      return false;
    }
  if(coo1)
    {
      bool ret=coo1->isEqual(*coo2,eps);
      if(!ret)
        {
          what="Coords differ !";
          return false;
        }
    }
  {
    const DataArrayIdType *famc1(_fam_coords),*famc2(otherC->_fam_coords);
    if((famc1==0 && famc2!=0) || (famc1!=0 && famc2==0))
      {
        what="Mismatch of families arr on nodes ! One is defined and not other !";
        return false;
      }
    if(famc1)
      {
        bool ret=famc1->isEqual(*famc2);
        if(!ret)
          {
            what="Families arr on node differ !";
            return false;
          }
      }
  }
  {
    const DataArrayIdType *numc1(_num_coords),*numc2(otherC->_num_coords);
    if((numc1==0 && numc2!=0) || (numc1!=0 && numc2==0))
      {
        what="Mismatch of numbering arr on nodes ! One is defined and not other !";
        return false;
      }
    if(numc1)
      {
        bool ret=numc1->isEqual(*numc2);
        if(!ret)
          {
            what="Numbering arr on node differ !";
            return false;
          }
      }
  }
  {
    const DataArrayIdType *gnumc1(_global_num_coords),*gnumc2(otherC->_global_num_coords);
    if((gnumc1==0 && gnumc2!=0) || (gnumc1!=0 && gnumc2==0))
      {
        what="Mismatch of numbering arr on nodes ! One is defined and not other !";
        return false;
      }
    if(gnumc1)
      {
        bool ret=gnumc1->isEqual(*gnumc2);
        if(!ret)
          {
            what="Global numbering arr on node differ !";
            return false;
          }
      }
  }
  {
    const DataArrayAsciiChar *namec1(_name_coords),*namec2(otherC->_name_coords);
    if((namec1==0 && namec2!=0) || (namec1!=0 && namec2==0))
      {
        what="Mismatch of naming arr on nodes ! One is defined and not other !";
        return false;
      }
    if(namec1)
      {
        bool ret=namec1->isEqual(*namec2);
        if(!ret)
          {
            what="Names arr on node differ !";
            return false;
          }
      }
  }
  if(_ms.size()!=otherC->_ms.size())
    {
      what="Number of levels differs !";
      return false;
    }
  std::size_t sz=_ms.size();
  for(std::size_t i=0;i<sz;i++)
    {
      const MEDFileUMeshSplitL1 *s1=_ms[i];
      const MEDFileUMeshSplitL1 *s2=otherC->_ms[i];
      if((s1==0 && s2!=0) || (s1!=0 && s2==0))
        {
          what="Mismatch of presence of sub levels !";
          return false;
        }
      if(s1)
        {
          bool ret=s1->isEqual(s2,eps,what);
          if(!ret)
            return false;
        }
    }
  const PartDefinition *pd0(_part_coords),*pd1(otherC->_part_coords);
  if(!pd0 && !pd1)
    return true;
  if((!pd0 && pd1) || (pd0 && !pd1))
    {
      what=std::string("node part def is defined only for one among this or other !");
      return false;
    }
  return pd0->isEqual(pd1,what);
}

/*!
 * Check that the current object MEDFileUMesh is consistent. This does not check the optional renumbering of
 * nodes and cells. This last item is important for SMESH, see checkSMESHConsistency().
 * \throw if any internal part (i.e. mesh sub-levels and single geometric-type meshes) are inconsistent
 * \throw if internal family array is inconsistent
 * \sa checkSMESHConsistency()
 */
void MEDFileUMesh::checkConsistency() const
{
  if(!_coords || !_coords->isAllocated())
    {
      if(!_ms.size())
        throw INTERP_KERNEL::Exception("MEDFileUMesh::checkConsistency(): coords are null but some mesh parts are present!");
      if (!_fam_coords)
        throw INTERP_KERNEL::Exception("MEDFileUMesh::checkConsistency(): coords are null but not the internal node family array!");
      if (_num_coords.isNotNull() || _rev_num_coords.isNotNull() || _global_num_coords.isNotNull())
        throw INTERP_KERNEL::Exception("MEDFileUMesh::checkConsistency(): coords are null but not the internal node numbering array!");
    }
  else
    {
      mcIdType nbCoo = _coords->getNumberOfTuples();
      if (_fam_coords.isNotNull())
        _fam_coords->checkNbOfTuplesAndComp(nbCoo,1,"MEDFileUMesh::checkConsistency(): inconsistent internal node family array!");
      if (_num_coords.isNotNull())
        {
          _num_coords->checkNbOfTuplesAndComp(nbCoo,1,"MEDFileUMesh::checkConsistency(): inconsistent internal node numbering array!");
          mcIdType pos;
          mcIdType maxValue=_num_coords->getMaxValue(pos);
          if (!_rev_num_coords || _rev_num_coords->getNumberOfTuples() != (maxValue+1))
            throw INTERP_KERNEL::Exception("MEDFileUMesh::checkConsistency(): inconsistent internal revert node numbering array!");
        }
      if (_global_num_coords.isNotNull())
        {
          _global_num_coords->checkNbOfTuplesAndComp(nbCoo,1,"MEDFileUMesh::checkConsistency(): inconsistent global node numbering array!");
        }
      if ((_num_coords && !_rev_num_coords) || (!_num_coords && _rev_num_coords))
        throw INTERP_KERNEL::Exception("MEDFileUMesh::checkConsistency(): inconsistent internal numbering arrays (one is null)!");
      if (_num_coords && !_num_coords->hasUniqueValues())
        throw INTERP_KERNEL::Exception("MEDFileUMesh::checkConsistency(): inconsistent internal node numbering array: duplicates found!");
      if (_name_coords)
        _name_coords->checkNbOfTuplesAndComp(nbCoo,MED_SNAME_SIZE,"MEDFileUMesh::checkConsistency(): inconsistent internal coord name array!");
      // Now sub part check:
      for (std::vector< MCAuto<MEDFileUMeshSplitL1> >::const_iterator it=_ms.begin();
          it != _ms.end(); it++)
        (*it)->checkConsistency();
    }
}

/**
 * Same as checkConsistency() but also checks that optional entities (edges, faces, volumes) numbers are
 * consistent, i.e. the numbering is either set to null for all sub-levels (thus letting SMESH numbers the
 * entities as it likes), or non overlapping between all sub-levels.
 * \throw if the condition above is not respected
 */
void MEDFileUMesh::checkSMESHConsistency() const
{
  checkConsistency();
  // For all sub-levels, numbering is either always null or with void intersection:
  if (_ms.size())
    {
      std::vector< MCAuto<MEDFileUMeshSplitL1> >::const_iterator it=_ms.begin();
      std::vector< const DataArrayIdType * > v;
      bool voidOrNot = ((*it)->_num == 0);
      for (it++; it != _ms.end(); it++)
        if( ((*it)->_num == 0) != voidOrNot )
          throw INTERP_KERNEL::Exception("MEDFileUMesh::checkConsistency(): inconsistent numbering between mesh sub-levels!");
        else if (!voidOrNot)
          v.push_back((*it)->_num);
      if (!voidOrNot)
        {
          // don't forget the 1st one:
          v.push_back(_ms[0]->_num);
          MCAuto<DataArrayIdType> inter = DataArrayIdType::BuildIntersection(v);
          if (inter->getNumberOfTuples())
            throw INTERP_KERNEL::Exception("MEDFileUMesh::checkConsistency(): overlapping entity numbering between mesh sub-levels!");
        }
    }
}

/**
 * Reset optional node and cell numbering for all sub levels in this. This particularly useful to make
 * sure SMESH will handle the mesh correctly, as it tries to use those numbers if given.
 */
void MEDFileUMesh::clearNodeAndCellNumbers()
{
  _num_coords.nullify();
  _rev_num_coords.nullify();
  _global_num_coords.nullify();
  for (std::vector< MCAuto<MEDFileUMeshSplitL1> >::iterator it=_ms.begin(); it != _ms.end(); it++)
    {
      (*it)->_num.nullify();
      (*it)->_rev_num.nullify();
      (*it)->_global_num.nullify();
    }
}

/*!
 * Clears redundant attributes of incorporated data arrays.
 */
void MEDFileUMesh::clearNonDiscrAttributes() const
{
  MEDFileMesh::clearNonDiscrAttributes();
  if(_coords.isNotNull())
    _coords.iAmATrollConstCast()->setName("");//This parameter is not discriminant for comparison
  if(_fam_coords.isNotNull())
    _fam_coords.iAmATrollConstCast()->setName("");//This parameter is not discriminant for comparison
  if(_num_coords.isNotNull())
    _num_coords.iAmATrollConstCast()->setName("");//This parameter is not discriminant for comparison
  if(_name_coords.isNotNull())
    _name_coords.iAmATrollConstCast()->setName("");//This parameter is not discriminant for comparison
  for(std::vector< MCAuto<MEDFileUMeshSplitL1> >::const_iterator it=_ms.begin();it!=_ms.end();it++)
    {
      if((*it).isNotNull())
        (*it)->clearNonDiscrAttributes();
    }
}

void MEDFileUMesh::setName(const std::string& name)
{
  for(std::vector< MCAuto<MEDFileUMeshSplitL1> >::iterator it=_ms.begin();it!=_ms.end();it++)
    if((*it).isNotNull())
      (*it)->setName(name);
  MEDFileMesh::setName(name);
}

MEDFileUMesh::MEDFileUMesh()
{
}

MEDFileUMesh::MEDFileUMesh(med_idt fid, const std::string& mName, int dt, int it, MEDFileMeshReadSelector *mrs)
try
{
    loadLLWithAdditionalItems(fid,mName,dt,it,mrs);
}
catch(INTERP_KERNEL::Exception& e)
{
    throw e;
}

/*!
 * This method loads only a part of specified cells (given by range of cell ID per geometric type)
 * See MEDFileUMesh::LoadPartOf for detailed description.
 *
 * \sa loadLL
 */
void MEDFileUMesh::loadPartUMeshFromFile(med_idt fid, const std::string& mName, const std::vector<INTERP_KERNEL::NormalizedCellType>& types, const std::vector<mcIdType>& slicPerTyp, int dt, int it, MEDFileMeshReadSelector *mrs)
{
  MEDFileUMeshL2 loaderl2;
  MEDCoupling::MEDCouplingMeshType meshType;
  int dummy0,dummy1;
  std::string dummy2;
  MEDCoupling::MEDCouplingAxisType dummy3;
  INTERP_KERNEL::AutoCppPtr<MeshOrStructMeshCls> mid(MEDFileUMeshL2::GetMeshIdFromName(fid,mName,meshType,dummy3,dummy0,dummy1,dummy2));
  if(meshType!=UNSTRUCTURED)
    {
      std::ostringstream oss; oss << "loadPartUMeshFromFile : Trying to load as unstructured an existing mesh with name '" << mName << "' !";
      throw INTERP_KERNEL::Exception(oss.str().c_str());
    }
  loaderl2.loadPart(fid,mid,mName,types,slicPerTyp,dt,it,mrs);
  dispatchLoadedPart(fid,loaderl2,mName,mrs);
}

/*!
 * \brief Write joints in a file
 */
void MEDFileMesh::writeJoints(med_idt fid) const
{
  if ( _joints.isNotNull() )
    _joints->writeLL(fid);
}

/*!
 * \brief Load joints in a file or use provided ones
 */
//================================================================================
/*!
 * \brief Load joints in a file or use provided ones
 *  \param [in] fid - MED file descriptor
 *  \param [in] toUseInstedOfReading - optional joints to use instead of reading,
 *          Usually this joints are those just read by another iteration
 *          of namesake mesh, when this method is called by MEDFileMeshMultiTS::New()
 */
//================================================================================

void MEDFileMesh::loadJointsFromFile(med_idt fid, MEDFileJoints* toUseInstedOfReading)
{
  if ( toUseInstedOfReading )
    setJoints( toUseInstedOfReading );
  else
    _joints = MEDFileJoints::New( fid, _name );
}

void MEDFileMesh::loadEquivalences(med_idt fid)
{
  int nbOfEq(MEDFileEquivalences::PresenceOfEquivalences(fid,_name));
  if(nbOfEq>0)
    _equiv=MEDFileEquivalences::Load(fid,nbOfEq,this);
}

void MEDFileMesh::deepCpyEquivalences(const MEDFileMesh& other)
{
  const MEDFileEquivalences *equiv(other._equiv);
  if(equiv)
    _equiv=equiv->deepCopy(this);
}

bool MEDFileMesh::areEquivalencesEqual(const MEDFileMesh *other, std::string& what) const
{
  const MEDFileEquivalences *thisEq(_equiv),*otherEq(other->_equiv);
  if(!thisEq && !otherEq)
    return true;
  if(thisEq && otherEq)
    return thisEq->isEqual(otherEq,what);
  else
    {
      what+="Equivalence differs : defined in this and not in other (or reversely) !";
      return false;
    }
}

void MEDFileMesh::getEquivalencesRepr(std::ostream& oss) const
{
  const MEDFileEquivalences *equiv(_equiv);
  if(!equiv)
    return ;
  oss << "(******************************)\n(* EQUIVALENCES OF THE MESH : *)\n(******************************)\n";
  _equiv->getRepr(oss);
}

void MEDFileMesh::checkCartesian() const
{
  if(getAxisType()!=AX_CART)
    {
      std::ostringstream oss; oss << "MEDFileMesh::checkCartesian : request for method that is dedicated to a cartesian convention ! But you are not in cartesian convention (" << DataArray::GetAxisTypeRepr(getAxisType()) << ").";
      oss << std::endl << "To perform operation you have two possibilities :" << std::endl;
      oss << " - call setAxisType(AX_CART)" << std::endl;
      oss << " - call cartesianize()";
      throw INTERP_KERNEL::Exception(oss.str().c_str());
    }
}

/*!
 * \brief Return number of joints, which is equal to number of adjacent mesh domains
 */
int MEDFileMesh::getNumberOfJoints() const
{
  return ( (const MEDFileJoints *) _joints ) ? _joints->getNumberOfJoints() : 0;
}

/*!
 * \brief Return joints with all adjacent mesh domains
 */
MEDFileJoints * MEDFileMesh::getJoints() const
{
  return const_cast<MEDFileJoints*>(& (*_joints));
}

void MEDFileMesh::setJoints( MEDFileJoints* joints )
{
  if ( joints != _joints )
    {
      _joints = joints;
      if ( joints )
        joints->incrRef();
    }
}

/*!
 * This method loads \b all \b the \b mesh \a mName in the file with \a fid descriptor.
 *
 * \sa loadPartUMeshFromFile
 */
void MEDFileUMesh::loadLL(med_idt fid, const std::string& mName, int dt, int it, MEDFileMeshReadSelector *mrs)
{
  MEDFileUMeshL2 loaderl2;
  MEDCoupling::MEDCouplingMeshType meshType;
  int dummy0,dummy1;
  std::string dummy2;
  MEDCoupling::MEDCouplingAxisType axType;
  INTERP_KERNEL::AutoCppPtr<MeshOrStructMeshCls> mid(MEDFileUMeshL2::GetMeshIdFromName(fid,mName,meshType,axType,dummy0,dummy1,dummy2));
  setAxisType(axType);
  if(meshType!=UNSTRUCTURED)
    {
      std::ostringstream oss; oss << "Trying to load as unstructured an existing mesh with name '" << mName << "' !";
      throw INTERP_KERNEL::Exception(oss.str().c_str());
    }
  loaderl2.loadAll(fid,mid,mName,dt,it,mrs);
  dispatchLoadedPart(fid,loaderl2,mName,mrs);
  // Structure element part...
  med_int nModels(-1);
  {
    med_bool chgt=MED_FALSE,trsf=MED_FALSE;
    nModels=MEDmeshnEntity(fid,mName.c_str(),dt,it,MED_STRUCT_ELEMENT,MED_GEO_ALL,MED_CONNECTIVITY,MED_NODAL,&chgt,&trsf);
  }
  if(nModels<=0)
    return ;
  _elt_str.resize(nModels);
  for(int i=0;i<nModels;i++)
    _elt_str[i]=MEDFileEltStruct4Mesh::New(fid,mName,dt,it,i,mrs);
}

void MEDFileUMesh::dispatchLoadedPart(med_idt fid, const MEDFileUMeshL2& loaderl2, const std::string& mName, MEDFileMeshReadSelector *mrs)
{
  int lev=loaderl2.getNumberOfLevels();
  _ms.resize(lev);
  for(int i=0;i<lev;i++)
    {
      if(!loaderl2.emptyLev(i))
        _ms[i]=new MEDFileUMeshSplitL1(loaderl2,mName,i);
      else
        _ms[i]=0;
    }
  MEDFileMeshL2::ReadFamiliesAndGrps(fid,mName,_families,_groups,mrs);
  //
  setName(loaderl2.getName());
  setDescription(loaderl2.getDescription());
  setUnivName(loaderl2.getUnivName());
  setIteration(loaderl2.getIteration());
  setOrder(loaderl2.getOrder());
  setTimeValue(loaderl2.getTime());
  setTimeUnit(loaderl2.getTimeUnit());
  _coords=loaderl2.getCoords();
  if(!mrs || mrs->isNodeFamilyFieldReading())
    _fam_coords=loaderl2.getCoordsFamily();
  if(!mrs || mrs->isNodeNumFieldReading())
    _num_coords=loaderl2.getCoordsNum();
  if(!mrs || mrs->isNodeNameFieldReading())
    _name_coords=loaderl2.getCoordsName();
  if(!mrs || mrs->isGlobalNodeNumFieldReading())
    _global_num_coords=loaderl2.getCoordsGlobalNum();
  _part_coords=loaderl2.getPartDefOfCoo();
}

MEDFileUMesh::~MEDFileUMesh()
{
}

void MEDFileUMesh::writeMeshLL(med_idt fid) const
{
  const DataArrayDouble *coo=_coords;
  INTERP_KERNEL::AutoPtr<char> maa=MEDLoaderBase::buildEmptyString(MED_NAME_SIZE);
  INTERP_KERNEL::AutoPtr<char> desc=MEDLoaderBase::buildEmptyString(MED_COMMENT_SIZE);
  MEDLoaderBase::safeStrCpy(_name.c_str(),MED_NAME_SIZE,maa,_too_long_str);
  MEDLoaderBase::safeStrCpy(_desc_name.c_str(),MED_COMMENT_SIZE,desc,_too_long_str);
  int spaceDim=(int)(coo?coo->getNumberOfComponents():0);
  int mdim(0);
  if(!_ms.empty())
    mdim=getMeshDimension();
  INTERP_KERNEL::AutoPtr<char> comp=MEDLoaderBase::buildEmptyString(spaceDim*MED_SNAME_SIZE);
  INTERP_KERNEL::AutoPtr<char> unit=MEDLoaderBase::buildEmptyString(spaceDim*MED_SNAME_SIZE);
  for(int i=0;i<spaceDim;i++)
    {
      std::string info=coo->getInfoOnComponent(i);
      std::string c,u;
      MEDLoaderBase::splitIntoNameAndUnit(info,c,u);
      MEDLoaderBase::safeStrCpy2(c.c_str(),MED_SNAME_SIZE,comp+i*MED_SNAME_SIZE,_too_long_str);//MED_TAILLE_PNOM-1 to avoid to write '\0' on next compo
      MEDLoaderBase::safeStrCpy2(u.c_str(),MED_SNAME_SIZE,unit+i*MED_SNAME_SIZE,_too_long_str);//MED_TAILLE_PNOM-1 to avoid to write '\0' on next compo
    }
  MEDFILESAFECALLERWR0(MEDmeshCr,(fid,maa,spaceDim,mdim,MED_UNSTRUCTURED_MESH,desc,"",MED_SORT_DTIT,MEDFileMeshL2::TraduceAxisTypeRev(getAxisType()),comp,unit));
  if(_univ_wr_status)
    MEDFILESAFECALLERWR0(MEDmeshUniversalNameWr,(fid,maa));
  std::string meshName(MEDLoaderBase::buildStringFromFortran(maa,MED_NAME_SIZE));
  MEDFileUMeshL2::WriteCoords(fid,meshName,_iteration,_order,_time,_coords,_fam_coords,_num_coords,_name_coords,_global_num_coords);
  for(std::vector< MCAuto<MEDFileUMeshSplitL1> >::const_iterator it=_ms.begin();it!=_ms.end();it++)
    if((const MEDFileUMeshSplitL1 *)(*it)!=0)
      (*it)->write(fid,meshName,mdim);
  MEDFileUMeshL2::WriteFamiliesAndGrps(fid,meshName,_families,_groups,_too_long_str);
}

/*!
 * Returns relative dimensions of mesh entities (excluding nodes) present in \a this mesh.
 *  \return std::vector<int> - a sequence of the relative dimensions.
 */
std::vector<int> MEDFileUMesh::getNonEmptyLevels() const
{
  std::vector<int> ret;
  int lev=0;
  for(std::vector< MCAuto<MEDFileUMeshSplitL1> >::const_iterator it=_ms.begin();it!=_ms.end();it++,lev--)
    if((const MEDFileUMeshSplitL1 *)(*it)!=0)
      if(!(*it)->empty())
        ret.push_back(lev);
  return ret;
}

/*!
 * Returns relative dimensions of mesh entities (including nodes) present in \a this mesh.
 *  \return std::vector<int> - a sequence of the relative dimensions.
 */
std::vector<int> MEDFileUMesh::getNonEmptyLevelsExt() const
{
  std::vector<int> ret0=getNonEmptyLevels();
  if((const DataArrayDouble *) _coords)
    {
      std::vector<int> ret(ret0.size()+1);
      ret[0]=1;
      std::copy(ret0.begin(),ret0.end(),ret.begin()+1);
      return ret;
    }
  return ret0;
}

std::vector<int> MEDFileUMesh::getFamArrNonEmptyLevelsExt() const
{
  std::vector<int> ret;
  const DataArrayIdType *famCoo(_fam_coords);
  if(famCoo)
    ret.push_back(1);
  int lev=0;
  for(std::vector< MCAuto<MEDFileUMeshSplitL1> >::const_iterator it=_ms.begin();it!=_ms.end();it++,lev--)
    {
      const MEDFileUMeshSplitL1 *cur(*it);
      if(cur)
        if(cur->getFamilyField())
          ret.push_back(lev);
    }
  return ret;
}

std::vector<int> MEDFileUMesh::getNumArrNonEmptyLevelsExt() const
{
  std::vector<int> ret;
  if(_num_coords.isNotNull())
    ret.push_back(1);
  int lev=0;
  for(std::vector< MCAuto<MEDFileUMeshSplitL1> >::const_iterator it=_ms.begin();it!=_ms.end();it++,lev--)
    {
      const MEDFileUMeshSplitL1 *cur(*it);
      if(cur)
        if(cur->getNumberField())
          ret.push_back(lev);
    }
  return ret;
}

std::vector<int> MEDFileUMesh::getNameArrNonEmptyLevelsExt() const
{
  std::vector<int> ret;
  const DataArrayAsciiChar *nameCoo(_name_coords);
  if(nameCoo)
    ret.push_back(1);
  int lev=0;
  for(std::vector< MCAuto<MEDFileUMeshSplitL1> >::const_iterator it=_ms.begin();it!=_ms.end();it++,lev--)
    {
      const MEDFileUMeshSplitL1 *cur(*it);
      if(cur)
        if(cur->getNameField())
          ret.push_back(lev);
    }
  return ret;
}

/*!
 * Returns all relative mesh levels (**excluding nodes**) where given families are defined.
 * To include nodes, call getFamsNonEmptyLevelsExt() method.
 *  \param [in] fams - the name of the family of interest.
 *  \return std::vector<int> - a sequence of the relative dimensions.
 */
std::vector<mcIdType> MEDFileUMesh::getFamsNonEmptyLevels(const std::vector<std::string>& fams) const
{
  std::vector<mcIdType> ret;
  std::vector<int> levs(getNonEmptyLevels());
  std::vector<mcIdType> famIds(getFamiliesIds(fams));
  for(std::vector<int>::const_iterator it=levs.begin();it!=levs.end();it++)
    if(_ms[-(*it)]->presenceOfOneFams(famIds))
      ret.push_back(*it);
  return ret;
}

/*!
 * Returns all relative mesh levels (including nodes) where given families are defined.
 *  \param [in] fams - the names of the families of interest.
 *  \return std::vector<int> - a sequence of the relative dimensions.
 */
std::vector<mcIdType> MEDFileUMesh::getFamsNonEmptyLevelsExt(const std::vector<std::string>& fams) const
{
  std::vector<mcIdType> ret0(getFamsNonEmptyLevels(fams));
  const DataArrayIdType *famCoords(_fam_coords);
  if(!famCoords)
    return ret0;
  std::vector<mcIdType> famIds(getFamiliesIds(fams));
  if(famCoords->presenceOfValue(famIds))
    {
      std::vector<mcIdType> ret(ret0.size()+1);
      ret[0]=1;
      std::copy(ret0.begin(),ret0.end(),ret.begin()+1);
      return ret;
    }
  else
    return ret0;
}

mcIdType MEDFileUMesh::getMaxAbsFamilyIdInArrays() const
{
  mcIdType ret=-std::numeric_limits<mcIdType>::max(),tmp=-1;
  if((const DataArrayIdType *)_fam_coords)
    {
      mcIdType val=_fam_coords->getMaxValue(tmp);
      ret=std::max(ret,std::abs(val));
    }
  for(std::vector< MCAuto<MEDFileUMeshSplitL1> >::const_iterator it=_ms.begin();it!=_ms.end();it++)
    {
      if((const MEDFileUMeshSplitL1 *)(*it))
        {
          const DataArrayIdType *da=(*it)->getFamilyField();
          if(da)
            {
              mcIdType val=da->getMaxValue(tmp);
              ret=std::max(ret,std::abs(val));
            }
        }
    }
  return ret;
}

mcIdType MEDFileUMesh::getMaxFamilyIdInArrays() const
{
  mcIdType ret=-std::numeric_limits<mcIdType>::max(),tmp=-1;
  if((const DataArrayIdType *)_fam_coords)
    {
      mcIdType val=_fam_coords->getMaxValue(tmp);
      ret=std::max(ret,val);
    }
  for(std::vector< MCAuto<MEDFileUMeshSplitL1> >::const_iterator it=_ms.begin();it!=_ms.end();it++)
    {
      if((const MEDFileUMeshSplitL1 *)(*it))
        {
          const DataArrayIdType *da=(*it)->getFamilyField();
          if(da)
            {
              mcIdType val=da->getMaxValue(tmp);
              ret=std::max(ret,val);
            }
        }
    }
  return ret;
}

mcIdType MEDFileUMesh::getMinFamilyIdInArrays() const
{
  mcIdType ret=std::numeric_limits<mcIdType>::max(),tmp=-1;
  if((const DataArrayIdType *)_fam_coords)
    {
      mcIdType val=_fam_coords->getMinValue(tmp);
      ret=std::min(ret,val);
    }
  for(std::vector< MCAuto<MEDFileUMeshSplitL1> >::const_iterator it=_ms.begin();it!=_ms.end();it++)
    {
      if((const MEDFileUMeshSplitL1 *)(*it))
        {
          const DataArrayIdType *da=(*it)->getFamilyField();
          if(da)
            {
              mcIdType val=da->getMinValue(tmp);
              ret=std::min(ret,val);
            }
        }
    }
  return ret;
}

/*!
 * Returns the dimension on cells in \a this mesh.
 *  \return int - the mesh dimension.
 *  \throw If there are no cells in this mesh.
 */
int MEDFileUMesh::getMeshDimension() const
{
  int lev=0;
  for(std::vector< MCAuto<MEDFileUMeshSplitL1> >::const_iterator it=_ms.begin();it!=_ms.end();it++,lev++)
    if((const MEDFileUMeshSplitL1 *)(*it)!=0)
      return (*it)->getMeshDimension()+lev;
  throw INTERP_KERNEL::Exception("MEDFileUMesh::getMeshDimension : impossible to find a mesh dimension !");
}

/*!
 * Returns the space dimension of \a this mesh that is equal to number of components in
 * the node coordinates array.
 *  \return int - the space dimension of \a this mesh.
 *  \throw If the node coordinates array is not available.
 */
int MEDFileUMesh::getSpaceDimension() const
{
  const DataArrayDouble *coo=_coords;
  if(!coo)
    throw INTERP_KERNEL::Exception(" MEDFileUMesh::getSpaceDimension : no coords set !");
  return (int)coo->getNumberOfComponents();
}

/*!
 * Returns a string describing \a this mesh.
 *  \return std::string - the mesh information string.
 */
std::string MEDFileUMesh::simpleRepr() const
{
  std::ostringstream oss;
  oss << MEDFileMesh::simpleRepr();
  const DataArrayDouble *coo=_coords;
  oss << "- The dimension of the space is ";
  static const char MSG1[]= "*** NO COORDS SET ***";
  static const char MSG2[]= "*** NO CONNECTIVITY SET FOR THIS LEVEL***";
  if(coo)
    oss << _coords->getNumberOfComponents() << std::endl;
  else
    oss << MSG1 << std::endl;
  oss << "- Type of the mesh : UNSTRUCTURED\n";
  oss << "- Number of nodes : ";
  if(coo)
    oss << _coords->getNumberOfTuples() << std::endl;
  else
    oss << MSG1 << std::endl;
  std::size_t nbOfLev=_ms.size();
  oss << "- Number of levels allocated : " << nbOfLev << std::endl;
  for(std::size_t i=0;i<nbOfLev;i++)
    {
      const MEDFileUMeshSplitL1 *lev=_ms[i];
      oss << "  - Level #" << -((int) i) << " has dimension : ";
      if(lev)
        {
          oss << lev->getMeshDimension() << std::endl;
          lev->simpleRepr(oss);
        }
      else
        oss << MSG2 << std::endl;
    }
  oss << "- Number of families : " << _families.size() << std::endl << std::endl;
  if(coo)
    {
      oss << "(***********************)\n(* NODES OF THE MESH : *)\n(***********************)\n";
      oss << "- Names of coordinates :" << std::endl;
      std::vector<std::string> vars=coo->getVarsOnComponent();
      std::copy(vars.begin(),vars.end(),std::ostream_iterator<std::string>(oss," "));
      oss << std::endl << "- Units of coordinates : " << std::endl;
      std::vector<std::string> units=coo->getUnitsOnComponent();
      std::copy(units.begin(),units.end(),std::ostream_iterator<std::string>(oss," "));
    }
  oss << std::endl << std::endl;
  getFamilyRepr(oss);
  getEquivalencesRepr(oss);
  return oss.str();
}

/*!
 * Returns a full textual description of \a this mesh.
 *  \return std::string - the string holding the mesh description.
 */
std::string MEDFileUMesh::advancedRepr() const
{
  return simpleRepr();
}

/*!
 * Returns number of mesh entities of a given relative dimension in \a this mesh.
 *  \param [in] meshDimRelToMaxExt - the relative dimension of interest.
 *  \return mcIdType - the number of entities.
 *  \throw If no mesh entities of dimension \a meshDimRelToMaxExt are available in \a this mesh.
 */
mcIdType MEDFileUMesh::getSizeAtLevel(int meshDimRelToMaxExt) const
{
  if(meshDimRelToMaxExt==1)
    {
      if(!((const DataArrayDouble *)_coords))
        throw INTERP_KERNEL::Exception("MEDFileUMesh::getSizeAtLevel : no coordinates specified !");
      return _coords->getNumberOfTuples();
    }
  return getMeshAtLevSafe(meshDimRelToMaxExt)->getSize();
}

/*!
 * Returns the family field for mesh entities of a given dimension.
 *  \param [in] meshDimRelToMaxExt - the relative dimension of mesh entities.
 *  \return const DataArrayIdType * - the family field. It is an array of ids of families
 *          each mesh entity belongs to. It can be \c NULL.
 */
const DataArrayIdType *MEDFileUMesh::getFamilyFieldAtLevel(int meshDimRelToMaxExt) const
{
  if(meshDimRelToMaxExt==1)
    return _fam_coords;
  const MEDFileUMeshSplitL1 *l1(getMeshAtLevSafe(meshDimRelToMaxExt));
  return l1->getFamilyField();
}

DataArrayIdType *MEDFileUMesh::getFamilyFieldAtLevel(int meshDimRelToMaxExt)
{
  if(meshDimRelToMaxExt==1)
    return _fam_coords;
  MEDFileUMeshSplitL1 *l1(getMeshAtLevSafe(meshDimRelToMaxExt));
  return l1->getFamilyField();
}

/*!
 * Returns the optional numbers of mesh entities of a given dimension.
 *  \param [in] meshDimRelToMaxExt - the relative dimension of mesh entities.
 *  \return const DataArrayIdType * - the array of the entity numbers.
 *  \throw If there are no mesh entities of \a meshDimRelToMaxExt dimension in \a this mesh.
 */
const DataArrayIdType *MEDFileUMesh::getNumberFieldAtLevel(int meshDimRelToMaxExt) const
{
  if(meshDimRelToMaxExt==1)
    return _num_coords;
  const MEDFileUMeshSplitL1 *l1=getMeshAtLevSafe(meshDimRelToMaxExt);
  return l1->getNumberField();
}

const DataArrayAsciiChar *MEDFileUMesh::getNameFieldAtLevel(int meshDimRelToMaxExt) const
{
  if(meshDimRelToMaxExt==1)
    return _name_coords;
  const MEDFileUMeshSplitL1 *l1=getMeshAtLevSafe(meshDimRelToMaxExt);
  return l1->getNameField();
}

MCAuto<DataArrayIdType> MEDFileUMesh::getGlobalNumFieldAtLevel(int meshDimRelToMaxExt) const
{
  if(meshDimRelToMaxExt!=1)
    throw INTERP_KERNEL::Exception("MEDFileUMesh::getGlobalNumFieldAtLevel : not implemented yet for structured mesh !");
  return _global_num_coords;
}

/*!
 * This method returns for a specified relative level \a meshDimRelToMaxExt the part effectively read (if the instance is the result of the read of a file).
 *
 * \param [in] meshDimRelToMaxExt - the extended relative level for which the part definition is requested.
 * \param [in] gt - The input geometric type for which the part definition is requested.
 * \return the part definition owned by \a this. So no need to deallocate the returned instance.
 */
const PartDefinition *MEDFileUMesh::getPartDefAtLevel(int meshDimRelToMaxExt, INTERP_KERNEL::NormalizedCellType gt) const
{
  if(meshDimRelToMaxExt==1)
    return _part_coords;
  const MEDFileUMeshSplitL1 *l1(getMeshAtLevSafe(meshDimRelToMaxExt));
  return l1->getPartDef(gt);
}

mcIdType MEDFileUMesh::getNumberOfNodes() const
{
  const DataArrayDouble *coo(_coords);
  if(!coo)
    throw INTERP_KERNEL::Exception(" MEDFileUMesh::getNumberOfNodes : no coords set !");
  return coo->getNumberOfTuples();
}

mcIdType MEDFileUMesh::getNumberOfCellsAtLevel(int meshDimRelToMaxExt) const
{
  const MEDFileUMeshSplitL1 *l1(getMeshAtLevSafe(meshDimRelToMaxExt));
  return l1->getNumberOfCells();
}

bool MEDFileUMesh::hasImplicitPart() const
{
  return false;
}

mcIdType MEDFileUMesh::buildImplicitPartIfAny(INTERP_KERNEL::NormalizedCellType gt) const
{
  throw INTERP_KERNEL::Exception("MEDFileUMesh::buildImplicitPartIfAny : unstructured meshes do not have implicit part !");
}

void MEDFileUMesh::releaseImplicitPartIfAny() const
{
}

void MEDFileUMesh::whichAreNodesFetched(const MEDFileField1TSStructItem& st, const MEDFileFieldGlobsReal *globs, std::vector<bool>& nodesFetched) const
{
  std::size_t sz(st.getNumberOfItems());
  for(std::size_t i=0;i<sz;i++)
    {
      INTERP_KERNEL::NormalizedCellType curGt(st[i].getGeo());
      const MEDCoupling1GTUMesh *m(getDirectUndergroundSingleGeoTypeMesh(curGt));
      if(st[i].getPflName().empty())
        m->computeNodeIdsAlg(nodesFetched);
      else
        {
          const DataArrayIdType *arr(globs->getProfile(st[i].getPflName()));
          MCAuto<MEDCoupling1GTUMesh> m2(dynamic_cast<MEDCoupling1GTUMesh *>(m->buildPartOfMySelf(arr->begin(),arr->end(),true)));
          m2->computeNodeIdsAlg(nodesFetched);
        }
    }
}

MEDFileMesh *MEDFileUMesh::cartesianize() const
{
  if(getAxisType()==AX_CART)
    {
      incrRef();
      return const_cast<MEDFileUMesh *>(this);
    }
  else
    {
      MCAuto<MEDFileUMesh> ret(new MEDFileUMesh(*this));
      const DataArrayDouble *coords(_coords);
      if(!coords)
        throw INTERP_KERNEL::Exception("MEDFileUMesh::cartesianize : coordinates are null !");
      MCAuto<DataArrayDouble> coordsCart(_coords->cartesianize(getAxisType()));
      for(std::vector< MCAuto<MEDFileUMeshSplitL1> >::iterator it=ret->_ms.begin();it!=ret->_ms.end();it++)
        if((const MEDFileUMeshSplitL1 *)(*it))
          *it=(*it)->shallowCpyUsingCoords(coordsCart);
      ret->_coords=coordsCart;
      ret->setAxisType(AX_CART);
      return ret.retn();
    }
}

bool MEDFileUMesh::presenceOfStructureElements() const
{
  for(std::vector< MCAuto<MEDFileEltStruct4Mesh> >::const_iterator it=_elt_str.begin();it!=_elt_str.end();it++)
    if((*it).isNotNull())
      return true;
  return false;
}

void MEDFileUMesh::killStructureElements()
{
  _elt_str.clear();
}

/*!
 * Returns the optional numbers of mesh entities of a given dimension transformed using
 * DataArrayIdType::invertArrayN2O2O2N().
 *  \param [in] meshDimRelToMaxExt - the relative dimension of mesh entities.
 *  \return const DataArrayIdType * - the array of the entity numbers transformed using
 *          DataArrayIdType::invertArrayN2O2O2N().
 *  \throw If there are no mesh entities of \a meshDimRelToMaxExt dimension in \a this mesh.
 */
const DataArrayIdType *MEDFileUMesh::getRevNumberFieldAtLevel(int meshDimRelToMaxExt) const
{
  if(meshDimRelToMaxExt==1)
    {
      if(_num_coords.isNull())
        throw INTERP_KERNEL::Exception("MEDFileUMesh::getRevNumberFieldAtLevel : no coordinates renum specified !");
      return _rev_num_coords;
    }
  const MEDFileUMeshSplitL1 *l1(getMeshAtLevSafe(meshDimRelToMaxExt));
  return l1->getRevNumberField();
}

/*!
 * Returns a pointer to the node coordinates array of \a this mesh \b without
 * incrementing its reference counter, thus there is no need to decrRef() it by the caller.
 */
DataArrayDouble *MEDFileUMesh::getCoords() const
{
  checkCartesian();
  MCAuto<DataArrayDouble> tmp(_coords);
  if((DataArrayDouble *)tmp)
    {
      return tmp;
    }
  return 0;
}

/*!
 * Returns a new MEDCouplingUMesh corresponding to mesh entities included in a given
 * group of \a this mesh. Only mesh entities of a given dimension are included in the
 * new mesh.
 *  \param [in] meshDimRelToMaxExt - the relative dimension of mesh entities of interest.
 *  \param [in] grp - the name of the group whose mesh entities are included in the
 *          new mesh.
 *  \param [in] renum - if \c true, cells and nodes of the result mesh are permuted
 *          according to the optional numbers of entities, if available.
 *  \return MEDCouplingUMesh * - a new instance of MEDCouplingUMesh. The caller is to
 *          delete this mesh using decrRef() as it is no more needed.
 *  \throw If the name of a nonexistent group is specified.
 *  \throw If there are no mesh entities of \a meshDimRelToMaxExt dimension in \a this mesh.
 */
MEDCouplingUMesh *MEDFileUMesh::getGroup(int meshDimRelToMaxExt, const std::string& grp, bool renum) const
{
  checkCartesian();
  synchronizeTinyInfoOnLeaves();
  std::vector<std::string> tmp(1);
  tmp[0]=grp;
  return getGroups(meshDimRelToMaxExt,tmp,renum);
}

/*!
 * Returns a new MEDCouplingUMesh corresponding to mesh entities included in given
 * groups of \a this mesh. Only mesh entities of a given dimension are included in the
 * new mesh.
 *  \param [in] meshDimRelToMaxExt - the relative dimension of mesh entities of interest.
 *  \param [in] grps - a sequence of group names whose mesh entities are included in the
 *          new mesh.
 *  \param [in] renum - if \c true, cells and nodes of the result mesh are permuted
 *          according to the optional numbers of entities, if available.
 *  \return MEDCouplingUMesh * - a new instance of MEDCouplingUMesh. The caller is to
 *          delete this mesh using decrRef() as it is no more needed.
 *  \throw If a name of a nonexistent group is present in \a grps.
 *  \throw If there are no mesh entities of \a meshDimRelToMaxExt dimension in \a this mesh.
 */
MEDCouplingUMesh *MEDFileUMesh::getGroups(int meshDimRelToMaxExt, const std::vector<std::string>& grps, bool renum) const
{
  checkCartesian();
  synchronizeTinyInfoOnLeaves();
  std::vector<std::string> fams2=getFamiliesOnGroups(grps);
  MCAuto<MEDCouplingUMesh> zeRet=getFamilies(meshDimRelToMaxExt,fams2,renum);
  if(grps.size()==1 && ((MEDCouplingUMesh *)zeRet))
    zeRet->setName(grps[0]);
  return zeRet.retn();
}

/*!
 * Returns a new MEDCouplingUMesh corresponding to mesh entities included in a given
 * family of \a this mesh. Only mesh entities of a given dimension are included in the
 * new mesh.
 *  \param [in] meshDimRelToMaxExt - the relative dimension of mesh entities of interest.
 *  \param [in] fam - the name of the family whose mesh entities are included in the
 *          new mesh.
 *  \param [in] renum - if \c true, cells and nodes of the result mesh are permuted
 *          according to the optional numbers of entities, if available.
 *  \return MEDCouplingUMesh * - a new instance of MEDCouplingUMesh. The caller is to
 *          delete this mesh using decrRef() as it is no more needed.
 *  \throw If a name of a nonexistent family is present in \a grps.
 *  \throw If there are no mesh entities of \a meshDimRelToMaxExt dimension in \a this mesh.
 */
MEDCouplingUMesh *MEDFileUMesh::getFamily(int meshDimRelToMaxExt, const std::string& fam, bool renum) const
{
  checkCartesian();
  synchronizeTinyInfoOnLeaves();
  std::vector<std::string> tmp(1);
  tmp[0]=fam;
  return getFamilies(meshDimRelToMaxExt,tmp,renum);
}

/*!
 * Returns a new MEDCouplingUMesh corresponding to mesh entities included in given
 * families of \a this mesh. Only mesh entities of a given dimension are included in the
 * new mesh.
 *  \param [in] meshDimRelToMaxExt - the relative dimension of mesh entities of interest.
 *  \param [in] fams - a sequence of family names whose mesh entities are included in the
 *          new mesh.
 *  \param [in] renum - if \c true, cells and nodes of the result mesh are permuted
 *          according to the optional numbers of entities, if available.
 *  \return MEDCouplingUMesh * - a new instance of MEDCouplingUMesh. The caller is to
 *          delete this mesh using decrRef() as it is no more needed.
 *  \throw If a name of a nonexistent family is present in \a fams.
 *  \throw If there are no mesh entities of \a meshDimRelToMaxExt dimension in \a this mesh.
 */
MEDCouplingUMesh *MEDFileUMesh::getFamilies(int meshDimRelToMaxExt, const std::vector<std::string>& fams, bool renum) const
{
  checkCartesian();
  synchronizeTinyInfoOnLeaves();
  if(meshDimRelToMaxExt==1)
    {
      MCAuto<DataArrayIdType> arr=getFamiliesArr(1,fams,renum);
      MCAuto<MEDCouplingUMesh> ret=MEDCouplingUMesh::New();
      MCAuto<DataArrayDouble> c=_coords->selectByTupleId(arr->getConstPointer(),arr->getConstPointer()+arr->getNbOfElems());
      ret->setCoords(c);
      return ret.retn();
    }
  std::vector<mcIdType> famIds=getFamiliesIds(fams);
  const MEDFileUMeshSplitL1 *l1=getMeshAtLevSafe(meshDimRelToMaxExt);
  MCAuto<MEDCouplingUMesh> zeRet;
  if(!famIds.empty())
    zeRet=l1->getFamilyPart(&famIds[0],&famIds[0]+famIds.size(),renum);
  else
    zeRet=l1->getFamilyPart(0,0,renum);
  if(fams.size()==1 && ((MEDCouplingUMesh *)zeRet))
    zeRet->setName(fams[0]);
  return zeRet.retn();
}

/*!
 * Returns ids of mesh entities contained in given families of a given dimension.
 *  \param [in] meshDimRelToMaxExt - a relative dimension of the mesh entities whose ids
 *          are required.
 *  \param [in] fams - the names of the families of interest.
 *  \param [in] renum - if \c true, the optional numbers of entities, if available, are
 *          returned instead of ids.
 *  \return DataArrayIdType * - a new instance of DataArrayIdType holding either ids or
 *          numbers, if available and required, of mesh entities of the families. The caller
 *          is to delete this array using decrRef() as it is no more needed. 
 *  \throw If the family field is missing for \a meshDimRelToMaxExt.
 */
DataArrayIdType *MEDFileUMesh::getFamiliesArr(int meshDimRelToMaxExt, const std::vector<std::string>& fams, bool renum) const
{
  std::vector<mcIdType> famIds=getFamiliesIds(fams);
  if(meshDimRelToMaxExt==1)
    {
      if((const DataArrayIdType *)_fam_coords)
        {
          MCAuto<DataArrayIdType> da;
          if(!famIds.empty())
            da=_fam_coords->findIdsEqualList(&famIds[0],&famIds[0]+famIds.size());
          else
            da=_fam_coords->findIdsEqualList(0,0);
          if(renum)
            return MEDFileUMeshSplitL1::Renumber(_num_coords,da);
          else
            return da.retn();
        }
      else
        throw INTERP_KERNEL::Exception("MEDFileUMesh::getFamiliesArr : no family array specified on nodes !");
    }
  const MEDFileUMeshSplitL1 *l1=getMeshAtLevSafe(meshDimRelToMaxExt);
  if(!famIds.empty())
    return l1->getFamilyPartArr(&famIds[0],&famIds[0]+famIds.size(),renum);
  else
    return l1->getFamilyPartArr(0,0,renum);
}

/*!
 * Returns a MEDCouplingUMesh of a given relative dimension.
 * \warning If \a meshDimRelToMaxExt == 1 (which means nodes), the returned mesh **is not
 * valid**. This is a feature, because MEDLoader does not create cells that do not exist! 
 * To build a valid MEDCouplingUMesh from the returned one in this case,
 * call MEDCouplingUMesh::Build0DMeshFromCoords().
 *  \param [in] meshDimRelToMaxExt - the relative dimension of interest.
 *  \param [in] renum - if \c true, the returned mesh is permuted according to the
 *          optional numbers of mesh entities.
 *  \return MEDCouplingUMesh * - a pointer to MEDCouplingUMesh that the caller is to
 *          delete using decrRef() as it is no more needed. 
 *  \throw If there are no mesh entities of \a meshDimRelToMaxExt dimension in \a this mesh.
 */
MEDCouplingUMesh *MEDFileUMesh::getMeshAtLevel(int meshDimRelToMaxExt, bool renum) const
{
  checkCartesian();
  synchronizeTinyInfoOnLeaves();
  if(meshDimRelToMaxExt==1)
    {
      if(!renum)
        {
          MEDCouplingUMesh *umesh=MEDCouplingUMesh::New();
          MCAuto<DataArrayDouble> cc=_coords->deepCopy();
          umesh->setCoords(cc);
          MEDFileUMeshSplitL1::ClearNonDiscrAttributes(umesh);
          umesh->setName(getName());
          return umesh;
        }
    }
  const MEDFileUMeshSplitL1 *l1=getMeshAtLevSafe(meshDimRelToMaxExt);
  return l1->getWholeMesh(renum);
}

std::vector<mcIdType> MEDFileUMesh::getDistributionOfTypes(int meshDimRelToMax) const
{
  const MEDFileUMeshSplitL1 *l1(getMeshAtLevSafe(meshDimRelToMax));
  return l1->getDistributionOfTypes();
}

/*!
 * Returns a MEDCouplingUMesh of a relative dimension == 0.
 *  \param [in] renum - if \c true, the returned mesh is permuted according to the
 *          optional numbers of mesh entities.
 *  \return MEDCouplingUMesh * - a pointer to MEDCouplingUMesh that the caller is to
 *          delete using decrRef() as it is no more needed. 
 *  \throw If there are no mesh entities of the relative dimension == 0 in \a this mesh.
 */
MEDCouplingUMesh *MEDFileUMesh::getLevel0Mesh(bool renum) const
{
  return getMeshAtLevel(0,renum);
}

/*!
 * Returns a MEDCouplingUMesh of a relative dimension == -1.
 *  \param [in] renum - if \c true, the returned mesh is permuted according to the
 *          optional numbers of mesh entities.
 *  \return MEDCouplingUMesh * - a pointer to MEDCouplingUMesh that the caller is to
 *          delete using decrRef() as it is no more needed. 
 *  \throw If there are no mesh entities of the relative dimension == -1 in \a this mesh.
 */
MEDCouplingUMesh *MEDFileUMesh::getLevelM1Mesh(bool renum) const
{
  return getMeshAtLevel(-1,renum);
}

/*!
 * Returns a MEDCouplingUMesh of a relative dimension == -2.
 *  \param [in] renum - if \c true, the returned mesh is permuted according to the
 *          optional numbers of mesh entities.
 *  \return MEDCouplingUMesh * - a pointer to MEDCouplingUMesh that the caller is to
 *          delete using decrRef() as it is no more needed. 
 *  \throw If there are no mesh entities of the relative dimension == -2 in \a this mesh.
 */
MEDCouplingUMesh *MEDFileUMesh::getLevelM2Mesh(bool renum) const
{
  return getMeshAtLevel(-2,renum);
}

/*!
 * Returns a MEDCouplingUMesh of a relative dimension == -3.
 *  \param [in] renum - if \c true, the returned mesh is permuted according to the
 *          optional numbers of mesh entities.
 *  \return MEDCouplingUMesh * - a pointer to MEDCouplingUMesh that the caller is to
 *          delete using decrRef() as it is no more needed. 
 *  \throw If there are no mesh entities of the relative dimension == -3 in \a this mesh.
 */
MEDCouplingUMesh *MEDFileUMesh::getLevelM3Mesh(bool renum) const
{
  return getMeshAtLevel(-3,renum);
}

/*!
 * This method is for advanced users. There is two storing strategy of mesh in \a this.
 * Either MEDCouplingUMesh, or vector of MEDCoupling1GTUMesh instances.
 * When assignment is done the first one is done, which is not optimal in write mode for MED file.
 * This method allows to switch from MEDCouplingUMesh mode to MEDCoupling1GTUMesh mode.
 */
void MEDFileUMesh::forceComputationOfParts() const
{
  for(std::vector< MCAuto<MEDFileUMeshSplitL1> >::const_iterator it=_ms.begin();it!=_ms.end();it++)
    {
      const MEDFileUMeshSplitL1 *elt(*it);
      if(elt)
        elt->forceComputationOfParts();
    }
}

/*!
 * This method returns a vector of mesh parts containing each exactly one geometric type.
 * This method will never launch an automatic computation of split by type (an INTERP_KERNEL::Exception will be then thrown).
 * This method is only for memory aware users.
 * The returned pointers are **NOT** new object pointer. No need to mange them.
 */
std::vector<MEDCoupling1GTUMesh *> MEDFileUMesh::getDirectUndergroundSingleGeoTypeMeshes(int meshDimRelToMax) const
{
  checkCartesian();
  const MEDFileUMeshSplitL1 *sp(getMeshAtLevSafe(meshDimRelToMax));
  return sp->getDirectUndergroundSingleGeoTypeMeshes();
}

/*!
 * This method returns the part of \a this having the geometric type \a gt.
 * If such part is not existing an exception will be thrown.
 * The returned pointer is **NOT** new object pointer. No need to mange it.
 */
MEDCoupling1GTUMesh *MEDFileUMesh::getDirectUndergroundSingleGeoTypeMesh(INTERP_KERNEL::NormalizedCellType gt) const
{
  checkCartesian();
  const INTERP_KERNEL::CellModel& cm(INTERP_KERNEL::CellModel::GetCellModel(gt));
  int lev=(int)cm.getDimension()-getMeshDimension();
  const MEDFileUMeshSplitL1 *sp(getMeshAtLevSafe(lev));
  return sp->getDirectUndergroundSingleGeoTypeMesh(gt);
}

/*!
 * This method returns for each geo types in \a this number of cells with this geo type.
 * This method returns info as a vector of pair. The first element of pair is geo type and the second the number of cells associated.
 * This method also returns the number of nodes of \a this (key associated is NORM_ERROR)
 *
 * \sa getDistributionOfTypes
 */
std::vector< std::pair<int,mcIdType> > MEDFileUMesh::getAllDistributionOfTypes() const
{
  std::vector< std::pair<int,mcIdType> > ret;
  std::vector<int> nel(getNonEmptyLevels());
  for(std::vector<int>::reverse_iterator it=nel.rbegin();it!=nel.rend();it++)
    {
      std::vector<INTERP_KERNEL::NormalizedCellType> gt(getGeoTypesAtLevel(*it));
      for(std::vector<INTERP_KERNEL::NormalizedCellType>::const_iterator it1=gt.begin();it1!=gt.end();it1++)
        {
          mcIdType nbCells(getNumberOfCellsWithType(*it1));
          ret.push_back(std::pair<int,mcIdType>(*it1,nbCells));
        }
    }
  ret.push_back(std::pair<int,mcIdType>(INTERP_KERNEL::NORM_ERROR,getNumberOfNodes()));
  return ret;
}

/*!
 * Given a relative level \a meshDimRelToMax it returns the sorted vector of geometric types present in \a this.
 * \throw if the reqsuested \a meshDimRelToMax does not exist.
 */
std::vector<INTERP_KERNEL::NormalizedCellType> MEDFileUMesh::getGeoTypesAtLevel(int meshDimRelToMax) const
{
  const MEDFileUMeshSplitL1 *sp(getMeshAtLevSafe(meshDimRelToMax));
  return sp->getGeoTypes();
}

mcIdType MEDFileUMesh::getNumberOfCellsWithType(INTERP_KERNEL::NormalizedCellType ct) const
{
  const INTERP_KERNEL::CellModel& cm=INTERP_KERNEL::CellModel::GetCellModel(ct);
  const MEDFileUMeshSplitL1 *sp(getMeshAtLevSafe( ((int)cm.getDimension())-getMeshDimension() ));
  return sp->getNumberOfCellsWithType(ct);
}

/*!
 * This method extracts from whole family field ids the part relative to the input parameter \a gt.
 * \param [in] gt - the geometric type for which the family field is asked.
 * \return DataArrayIdType * - a pointer to DataArrayIdType that the caller is to
 *          delete using decrRef() as it is no more needed.
 * \sa MEDFileUMesh::extractNumberFieldOnGeoType
 */
DataArrayIdType *MEDFileUMesh::extractFamilyFieldOnGeoType(INTERP_KERNEL::NormalizedCellType gt) const
{
  const INTERP_KERNEL::CellModel& cm=INTERP_KERNEL::CellModel::GetCellModel(gt);
  int lev=(int)cm.getDimension()-getMeshDimension();
  const MEDFileUMeshSplitL1 *sp(getMeshAtLevSafe(lev));
  return sp->extractFamilyFieldOnGeoType(gt);
}

/*!
 * This method extracts from whole number field ids the part relative to the input parameter \a gt.
 * \param [in] gt - the geometric type for which the number field is asked.
 * \return DataArrayIdType * - a pointer to DataArrayIdType that the caller is to
 *          delete using decrRef() as it is no more needed.
 * \sa MEDFileUMesh::extractFamilyFieldOnGeoType
 */
DataArrayIdType *MEDFileUMesh::extractNumberFieldOnGeoType(INTERP_KERNEL::NormalizedCellType gt) const
{
  const INTERP_KERNEL::CellModel& cm=INTERP_KERNEL::CellModel::GetCellModel(gt);
  int lev=(int)cm.getDimension()-getMeshDimension();
  const MEDFileUMeshSplitL1 *sp(getMeshAtLevSafe(lev));
  return sp->extractNumberFieldOnGeoType(gt);
}

/*!
 * This method returns for specified geometric type \a gt the relative level to \a this.
 * If the relative level is empty an exception will be thrown.
 */
int MEDFileUMesh::getRelativeLevOnGeoType(INTERP_KERNEL::NormalizedCellType gt) const
{
  const INTERP_KERNEL::CellModel& cm=INTERP_KERNEL::CellModel::GetCellModel(gt);
  int ret((int)cm.getDimension()-getMeshDimension());
  getMeshAtLevSafe(ret);//To test that returned value corresponds to a valid level.
  return ret;
}

const MEDFileUMeshSplitL1 *MEDFileUMesh::getMeshAtLevSafe(int meshDimRelToMaxExt) const
{
  if(meshDimRelToMaxExt==1)
    throw INTERP_KERNEL::Exception("Dimension request is invalid : asking for node level (1) !");
  if(meshDimRelToMaxExt>1)
    throw INTERP_KERNEL::Exception("Dimension request is invalid (>1) !");
  int tracucedRk=-meshDimRelToMaxExt;
  if(tracucedRk>=(int)_ms.size())
    throw INTERP_KERNEL::Exception("Invalid mesh dim relative to max given ! Too low !");
  if((const MEDFileUMeshSplitL1 *)_ms[tracucedRk]==0)
    throw INTERP_KERNEL::Exception("On specified lev (or entity) no cells exists !");
  return _ms[tracucedRk];
}

MEDFileUMeshSplitL1 *MEDFileUMesh::getMeshAtLevSafe(int meshDimRelToMaxExt)
{
  if(meshDimRelToMaxExt==1)
    throw INTERP_KERNEL::Exception("Dimension request is invalid : asking for node level (1) !");
  if(meshDimRelToMaxExt>1)
    throw INTERP_KERNEL::Exception("Dimension request is invalid (>1) !");
  int tracucedRk=-meshDimRelToMaxExt;
  if(tracucedRk>=(int)_ms.size())
    throw INTERP_KERNEL::Exception("Invalid mesh dim relative to max given ! Too low !");
  if((const MEDFileUMeshSplitL1 *)_ms[tracucedRk]==0)
    throw INTERP_KERNEL::Exception("On specified lev (or entity) no cells exists !");
  return _ms[tracucedRk];
}

void MEDFileUMesh::checkMeshDimCoherency(int meshDim, int meshDimRelToMax) const
{
  if(-meshDimRelToMax>=(int)_ms.size())
    throw INTERP_KERNEL::Exception("MEDFileUMesh::checkMeshDimCoherency : The meshdim of mesh is not managed by 'this' !");
  int i=0;
  for(std::vector< MCAuto<MEDFileUMeshSplitL1> >::const_iterator it=_ms.begin();it!=_ms.end();it++,i++)
    {
      if(((const MEDFileUMeshSplitL1*) (*it))!=0)
        {
          int ref=(*it)->getMeshDimension();
          if(ref+i!=meshDim-meshDimRelToMax)
            throw INTERP_KERNEL::Exception("MEDFileUMesh::checkMeshDimCoherency : no coherency between levels !");
        }
    }
}

/*!
 * Sets the node coordinates array of \a this mesh.
 *  \param [in] coords - the new node coordinates array.
 *  \throw If \a coords == \c NULL.
 */
void MEDFileUMesh::setCoords(DataArrayDouble *coords)
{
  if(!coords)
    throw INTERP_KERNEL::Exception("MEDFileUMesh::setCoords : null pointer in input !");
  if(coords==(DataArrayDouble *)_coords)
    return ;
  coords->checkAllocated();
  mcIdType nbOfTuples(coords->getNumberOfTuples());
  _coords.takeRef(coords);
  _fam_coords=DataArrayIdType::New();
  _fam_coords->alloc(nbOfTuples,1);
  _fam_coords->fillWithZero();
  _num_coords.nullify(); _rev_num_coords.nullify(); _name_coords.nullify(); _global_num_coords.nullify();
  for(std::vector< MCAuto<MEDFileUMeshSplitL1> >::iterator it=_ms.begin();it!=_ms.end();it++)
    if((MEDFileUMeshSplitL1 *)(*it))
      (*it)->setCoords(coords);
}

/*!
 * Change coords without changing anything concerning families and numbering on nodes.
 */
void MEDFileUMesh::setCoordsForced(DataArrayDouble *coords)
{
  if(!coords)
    throw INTERP_KERNEL::Exception("MEDFileUMesh::setCoordsForced : null pointer in input !");
  if(coords==(DataArrayDouble *)_coords)
    return ;
  coords->checkAllocated();
  mcIdType nbOfTuples(coords->getNumberOfTuples());
  if(_coords.isNull())
    {
      _coords=coords;
      coords->incrRef();
    }
  else
    {
      mcIdType oldNbTuples(_coords->getNumberOfTuples());
      if(oldNbTuples!=nbOfTuples)
        throw INTERP_KERNEL::Exception("MEDFileUMesh::setCoordsForced : number of tuples is not the same -> invoke setCoords instead !");
      _coords=coords;
      coords->incrRef();
    }
  for(std::vector< MCAuto<MEDFileUMeshSplitL1> >::iterator it=_ms.begin();it!=_ms.end();it++)
    if((MEDFileUMeshSplitL1 *)(*it))
      (*it)->setCoords(coords);
}

/*!
 * Removes all groups of a given dimension in \a this mesh.
 *  \param [in] meshDimRelToMaxExt - the relative dimension of interest.
 *  \throw If there are no mesh entities of \a meshDimRelToMaxExt dimension in \a this mesh.
 */
void MEDFileUMesh::eraseGroupsAtLevel(int meshDimRelToMaxExt)
{
  if(meshDimRelToMaxExt==1)
    {
      if((DataArrayIdType *)_fam_coords)
        _fam_coords->fillWithZero();
      return ;
    }
  MEDFileUMeshSplitL1 *l1=getMeshAtLevSafe(meshDimRelToMaxExt);
  l1->eraseFamilyField();
  optimizeFamilies();
}

/*!
 * Removes all families with ids not present in the family fields of \a this mesh.
 */
void MEDFileUMesh::optimizeFamilies()
{
  std::vector<int> levs=getNonEmptyLevelsExt();
  std::set<mcIdType> allFamsIds;
  for(std::vector<int>::const_iterator it=levs.begin();it!=levs.end();it++)
    {
      const DataArrayIdType *ffield=getFamilyFieldAtLevel(*it);
      MCAuto<DataArrayIdType> ids=ffield->getDifferentValues();
      std::set<mcIdType> res;
      std::set_union(ids->begin(),ids->end(),allFamsIds.begin(),allFamsIds.end(),std::inserter(res,res.begin()));
      allFamsIds=res;
    }
  std::set<std::string> famNamesToKill;
  for(std::map<std::string,mcIdType>::const_iterator it=_families.begin();it!=_families.end();it++)
    {
      if(allFamsIds.find((*it).second)!=allFamsIds.end())
        famNamesToKill.insert((*it).first);
    }
  for(std::set<std::string>::const_iterator it=famNamesToKill.begin();it!=famNamesToKill.end();it++)
    _families.erase(*it);
  std::vector<std::string> grpNamesToKill;
  for(std::map<std::string, std::vector<std::string> >::iterator it=_groups.begin();it!=_groups.end();it++)
    {
      std::vector<std::string> tmp;
      for(std::vector<std::string>::const_iterator it2=(*it).second.begin();it2!=(*it).second.end();it2++)
        {
          if(famNamesToKill.find(*it2)==famNamesToKill.end())
            tmp.push_back(*it2);
        }
      if(!tmp.empty())
        (*it).second=tmp;
      else
        tmp.push_back((*it).first);
    }
  for(std::vector<std::string>::const_iterator it=grpNamesToKill.begin();it!=grpNamesToKill.end();it++)
    _groups.erase(*it);
}

/**
 * \b this must be filled at level 0 and -1, typically the -1 level being (part of) the descending connectivity
 * of the top level. This method build a "crack", or an inner boundary, in \b this along the group of level -1 named grpNameM1.
 * The boundary is built according to the following method:
 *  - all nodes along the boundary which are not lying on an internal extremity of the (-1)-level group are duplicated (so the
 * coordinates array is extended).
 *  - new (-1)-level cells are built lying on those new nodes. So the edges/faces along the group are duplicated. A new group
 *  called "<grpNameM1>_dup" containing the effectively duplicated cells is created. Note that in 3D some cells of the group
 *  might not be duplicated at all.
 *  After this operation a top-level cell bordering the group will loose some neighbors (typically the cell which is  on the
 *  other side of the group is no more a neighbor)
 *  - the connectivity of (part of) the top level-cells bordering the group is also modified so that some cells
 *  bordering the newly created boundary use the newly computed nodes.
 *  - finally note that optional cell numbers are also affected by this method and might become invalid for SMESH.
 *  Use clearNodeAndCellNumbers() afterwards to ensure a proper SMESH loading.
 *
 *  \param[in] grpNameM1 name of the (-1)-level group defining the boundary
 *  \param[out] nodesDuplicated ids of the initial nodes which have been duplicated (and whose copy is put at the end of
 *  the coord array)
 *  \param[out] cellsModified ids of the cells whose connectivity has been modified (to use the newly created nodes)
 *  \param[out] cellsNotModified ids of the rest of cells bordering the new boundary whose connectivity remains unchanged.
 *  \sa clearNodeAndCellNumbers()
 */
void MEDFileUMesh::buildInnerBoundaryAlongM1Group(const std::string& grpNameM1, DataArrayIdType *&nodesDuplicated,
                                           DataArrayIdType *&cellsModified, DataArrayIdType *&cellsNotModified)
{
  typedef MCAuto<MEDCouplingUMesh> MUMesh;
  typedef MCAuto<DataArrayIdType> DAInt;

  std::vector<int> levs=getNonEmptyLevels();
  if(std::find(levs.begin(),levs.end(),0)==levs.end() || std::find(levs.begin(),levs.end(),-1)==levs.end())
    throw INTERP_KERNEL::Exception("MEDFileUMesh::buildInnerBoundaryAlongM1Group : This method works only for mesh defined on level 0 and -1 !");
  MUMesh m0=getMeshAtLevel(0);
  MUMesh m1=getMeshAtLevel(-1);
  mcIdType nbNodes=m0->getNumberOfNodes();
  MUMesh m11=getGroup(-1,grpNameM1);
  DataArrayIdType *tmp00=0, *tmp11=0,*tmp22=0;

  // !!! The core of the duplication logic is in these 2 methods:
  // !!!
  DAInt nodeIdsToDuplicate = m0->findNodesToDuplicate(*m11);  // identify nodes to duplicate
  m0->findCellsToRenumber(*m11, nodeIdsToDuplicate->begin(), nodeIdsToDuplicate->end(), tmp11,tmp22);  // identify cells needing renumbering
  DAInt cellsToModifyConn0(tmp11);
  DAInt cellsToModifyConn1(tmp22);
  // !!!!

  MUMesh tmp0=static_cast<MEDCouplingUMesh *>(m0->buildPartOfMySelf(cellsToModifyConn0->begin(),cellsToModifyConn0->end(),true));
  // node renumbering of cells in m1 impacted by duplication of node but not in group 'grpNameM1' on level -1
  DAInt descTmp0=DataArrayIdType::New(),descITmp0=DataArrayIdType::New(),revDescTmp0=DataArrayIdType::New(),revDescITmp0=DataArrayIdType::New();
  MUMesh tmp0Desc=tmp0->buildDescendingConnectivity(descTmp0,descITmp0,revDescTmp0,revDescITmp0);
  descTmp0=0; descITmp0=0; revDescTmp0=0; revDescITmp0=0;
  DAInt cellsInM1ToRenumW2=tmp0Desc->getCellIdsLyingOnNodes(nodeIdsToDuplicate->begin(),nodeIdsToDuplicate->end(),false);
  MUMesh cellsInM1ToRenumW3=static_cast<MEDCouplingUMesh *>(tmp0Desc->buildPartOfMySelf(cellsInM1ToRenumW2->begin(),cellsInM1ToRenumW2->end(),true));
  DataArrayIdType *cellsInM1ToRenumW4Tmp=0;
  m1->areCellsIncludedIn(cellsInM1ToRenumW3,2,cellsInM1ToRenumW4Tmp);
  DAInt cellsInM1ToRenumW4(cellsInM1ToRenumW4Tmp);
  DAInt cellsInM1ToRenumW5=cellsInM1ToRenumW4->findIdsInRange(0,m1->getNumberOfCells());
  cellsInM1ToRenumW5->transformWithIndArr(cellsInM1ToRenumW4->begin(),cellsInM1ToRenumW4->end());
  DAInt grpIds=getGroupArr(-1,grpNameM1);
  DAInt cellsInM1ToRenum=cellsInM1ToRenumW5->buildSubstraction(grpIds);
  MUMesh m1Part=static_cast<MEDCouplingUMesh *>(m1->buildPartOfMySelf(cellsInM1ToRenum->begin(),cellsInM1ToRenum->end(),true));
  m1Part->duplicateNodesInConn(nodeIdsToDuplicate->begin(),nodeIdsToDuplicate->end(),nbNodes);
  m1->setPartOfMySelf(cellsInM1ToRenum->begin(),cellsInM1ToRenum->end(),*m1Part);
  // end of node renumbering of cells in m1 impacted by duplication of node but not in group of level -1 'grpNameM1'
  tmp0->duplicateNodes(nodeIdsToDuplicate->begin(),nodeIdsToDuplicate->end());
  m0->setCoords(tmp0->getCoords());
  m0->setPartOfMySelf(cellsToModifyConn0->begin(),cellsToModifyConn0->end(),*tmp0);
  _ms[0]->forceComputationOfParts();  // necessary because we modify the connectivity of some internal part
  m1->setCoords(m0->getCoords());
  _coords=m0->getCoords(); _coords->incrRef();
  // duplication of cells in group 'grpNameM1' on level -1, but not duplicating cells for which nothing has changed
  m11->duplicateNodesInConn(nodeIdsToDuplicate->begin(),nodeIdsToDuplicate->end(),nbNodes); m11->setCoords(m0->getCoords());
  DataArrayIdType * duplCells;
  m1->areCellsIncludedIn(m11, 0, duplCells);
  DAInt zeIds = duplCells->findIdsNotInRange(-1, m1->getNumberOfCells()-1); duplCells->decrRef();
  MUMesh m11Part=static_cast<MEDCouplingUMesh *>(m11->buildPartOfMySelf(zeIds->begin(),zeIds->end(),true));
  std::vector<const MEDCouplingUMesh *> v(2); v[0]=m1; v[1]=m11Part;
  MUMesh newm1=MEDCouplingUMesh::AggregateSortedByTypeMeshesOnSameCoords(v,tmp00,tmp11);
  DAInt szOfCellGrpOfSameType(tmp00);
  DAInt idInMsOfCellGrpOfSameType(tmp11);
  //
  newm1->setName(getName());
  const DataArrayIdType *fam=getFamilyFieldAtLevel(-1);
  if(!fam)
    throw INTERP_KERNEL::Exception("MEDFileUMesh::buildInnerBoundaryAlongM1Group(): internal error no family field !");
  DAInt newFam=DataArrayIdType::New();
  newFam->alloc(newm1->getNumberOfCells(),1);
  // Get a new family ID: care must be taken if we need a positive ID or a negative one:
  // Positive ID for family of nodes, negative for all the rest.
  mcIdType idd;
  if (m1->getMeshDimension() == 0)
    idd=getMaxFamilyId()+1;
  else
    idd=getMinFamilyId()-1;
  mcIdType globStart=0,start=0,end,globEnd;
  mcIdType nbOfChunks=szOfCellGrpOfSameType->getNumberOfTuples();
  for(mcIdType i=0;i<nbOfChunks;i++)
    {
      globEnd=globStart+szOfCellGrpOfSameType->getIJ(i,0);
      if(idInMsOfCellGrpOfSameType->getIJ(i,0)==0)
        {
          end=start+szOfCellGrpOfSameType->getIJ(i,0);
          DAInt part=fam->selectByTupleIdSafeSlice(start,end,1);
          newFam->setPartOfValues1(part,globStart,globEnd,1,0,1,1,true);
          start=end;
        }
      else
        {
          newFam->setPartOfValuesSimple1(idd,globStart,globEnd,1,0,1,1);
        }
      globStart=globEnd;
    }
  newm1->setCoords(getCoords());
  setMeshAtLevel(-1,newm1);
  setFamilyFieldArr(-1,newFam);
  std::string grpName2(grpNameM1); grpName2+="_dup";
  addFamily(grpName2,idd);
  addFamilyOnGrp(grpName2,grpName2);
  //
  fam=_fam_coords;
  if(fam)
    {
      mcIdType newNbOfNodes=getCoords()->getNumberOfTuples();
      newFam=DataArrayIdType::New(); newFam->alloc(newNbOfNodes,1);
      newFam->setPartOfValues1(fam,0,nbNodes,1,0,1,1,true);
      newFam->setPartOfValuesSimple1(0,nbNodes,newNbOfNodes,1,0,1,1);
      _fam_coords=newFam;
    }

  _num_coords.nullify(); _rev_num_coords.nullify(); _global_num_coords.nullify();
  
  for (std::vector< MCAuto<MEDFileUMeshSplitL1> >::iterator it=_ms.begin();
      it != _ms.end(); it++)
    {
      (*it)->_num = 0;
      (*it)->_rev_num = 0;
    }
  nodesDuplicated=nodeIdsToDuplicate.retn();
  cellsModified=cellsToModifyConn0.retn();
  cellsNotModified=cellsToModifyConn1.retn();
}

/*! Similar to MEDCouplingUMesh::unPolyze():  converts all polygons (if \a this is a 2D mesh) or polyhedrons
 * (if \a this is a 3D mesh) to cells of classical types. The cells remain correctly sorted by geometric type
 * in this method.
 *
 * \param [out] oldCode retrieves the distribution of types before the call if true is returned
 * \param [out] newCode retrieves the distribution of types after the call if true is returned
 * \param [out] o2nRenumCell tells for **all levels** the old 2 new renumbering of cells.
 * 
 * \return false if no modification has been performed linked to the unpolyzation. Neither cell type, not cell numbers. When false is returned no need of field on cells or on gauss renumbering.
 * Inversely, if true is returned, it means that distribution of cell by geometric type has changed and field on cell and field on gauss point must be renumbered.
 */
bool MEDFileUMesh::unPolyze(std::vector<mcIdType>& oldCode, std::vector<mcIdType>& newCode, DataArrayIdType *& o2nRenumCell)
{
  o2nRenumCell=0; oldCode.clear(); newCode.clear();
  std::vector<int> levs=getNonEmptyLevels();
  bool ret=false;
  std::vector< const DataArrayIdType* > renumCellsSplited;//same than memorySaverIfThrow
  std::vector< MCAuto<DataArrayIdType> > memorySaverIfThrow;//same than renumCellsSplited only in case of throw
  mcIdType start=0;
  mcIdType end=0;
  for(std::vector<int>::reverse_iterator it=levs.rbegin();it!=levs.rend();it++)
    {
      MCAuto<MEDCouplingUMesh> m=getMeshAtLevel(*it);
      std::vector<mcIdType> code1=m->getDistributionOfTypes();
      end=PutInThirdComponentOfCodeOffset(code1,start);
      oldCode.insert(oldCode.end(),code1.begin(),code1.end());
      bool hasChanged=m->unPolyze();
      DataArrayIdType *fake=0;
      MCAuto<DataArrayIdType> o2nCellsPart=m->getLevArrPerCellTypes(MEDCouplingUMesh::MEDMEM_ORDER,
          MEDCouplingUMesh::MEDMEM_ORDER+MEDCouplingUMesh::N_MEDMEM_ORDER,fake);
      fake->decrRef();
      renumCellsSplited.push_back(o2nCellsPart); memorySaverIfThrow.push_back(o2nCellsPart);
      if(hasChanged)
        {
          MCAuto<DataArrayIdType> o2nCellsPart2=o2nCellsPart->buildPermArrPerLevel();
          m->renumberCells(o2nCellsPart2->getConstPointer(),false);
          ret=true;
          MCAuto<DataArrayIdType> famField2,numField2;
          const DataArrayIdType *famField=getFamilyFieldAtLevel(*it); if(famField) { famField->incrRef(); famField2=const_cast<DataArrayIdType *>(famField); }
          const DataArrayIdType *numField=getNumberFieldAtLevel(*it); if(numField) { numField->incrRef(); numField2=const_cast<DataArrayIdType *>(numField); }
          setMeshAtLevel(*it,m);
          std::vector<mcIdType> code2=m->getDistributionOfTypes();
          end=PutInThirdComponentOfCodeOffset(code2,start);
          newCode.insert(newCode.end(),code2.begin(),code2.end());
          //
          if(o2nCellsPart2->isIota(o2nCellsPart2->getNumberOfTuples()))
            continue;
          if(famField)
            {
              MCAuto<DataArrayIdType> newFamField=famField->renumber(o2nCellsPart2->getConstPointer());
              setFamilyFieldArr(*it,newFamField);
            }
          if(numField)
            {
              MCAuto<DataArrayIdType> newNumField=numField->renumber(o2nCellsPart2->getConstPointer());
              setRenumFieldArr(*it,newNumField);
            }
        }
      else
        {
          newCode.insert(newCode.end(),code1.begin(),code1.end());
        }
      start=end;
    }
  if(ret)
    {
      MCAuto<DataArrayIdType> renumCells=DataArrayIdType::Aggregate(renumCellsSplited);
      MCAuto<DataArrayIdType> o2nRenumCellRet=renumCells->buildPermArrPerLevel();
      o2nRenumCell=o2nRenumCellRet.retn();
    }
  return ret;
}

/*! \cond HIDDEN_ITEMS */
struct MEDLoaderAccVisit1
{
  MEDLoaderAccVisit1():_new_nb_of_nodes(0) { }
  mcIdType operator()(bool val) { return val?_new_nb_of_nodes++:-1; }
  mcIdType _new_nb_of_nodes;
};
/*! \endcond */

/*!
 * Array returned is the correspondence in \b old \b to \b new format. The returned array is newly created and should be dealt by the caller.
 * The maximum value stored in returned array is the number of nodes of \a this minus 1 after call of this method.
 * The size of returned array is the number of nodes of the old (previous to the call of this method) number of nodes.
 * -1 values in returned array means that the corresponding old node is no more used.
 *
 * \return newly allocated array containing correspondence in \b old \b to \b new format. If all nodes in \a this are fetched \c NULL pointer is returned and nothing
 *         is modified in \a this.
 * \throw If no coordinates are set in \a this or if there is in any available mesh in \a this a cell having a nodal connectivity containing a node id not in the range of
 *  set coordinates.
 */
DataArrayIdType *MEDFileUMesh::zipCoords()
{
  const DataArrayDouble *coo(getCoords());
  if(!coo)
    throw INTERP_KERNEL::Exception("MEDFileUMesh::zipCoords : no coordinates set in this !");
  mcIdType nbOfNodes(coo->getNumberOfTuples());
  std::vector<bool> nodeIdsInUse(nbOfNodes,false);
  std::vector<int> neLevs(getNonEmptyLevels());
  for(std::vector<int>::const_iterator lev=neLevs.begin();lev!=neLevs.end();lev++)
    {
      const MEDFileUMeshSplitL1 *zeLev(getMeshAtLevSafe(*lev));
      if(zeLev->isMeshStoredSplitByType())
        {
          std::vector<MEDCoupling1GTUMesh *> ms(zeLev->getDirectUndergroundSingleGeoTypeMeshes());
          for(std::vector<MEDCoupling1GTUMesh *>::const_iterator it=ms.begin();it!=ms.end();it++)
            if(*it)
              (*it)->computeNodeIdsAlg(nodeIdsInUse);
        }
      else
        {
          MCAuto<MEDCouplingUMesh> mesh(zeLev->getWholeMesh(false));
          mesh->computeNodeIdsAlg(nodeIdsInUse);
        }
    }
  mcIdType nbrOfNodesInUse((mcIdType)std::count(nodeIdsInUse.begin(),nodeIdsInUse.end(),true));
  if(nbrOfNodesInUse==nbOfNodes)
    return 0;//no need to update _part_coords
  MCAuto<DataArrayIdType> ret(DataArrayIdType::New()); ret->alloc(nbOfNodes,1);
  std::transform(nodeIdsInUse.begin(),nodeIdsInUse.end(),ret->getPointer(),MEDLoaderAccVisit1());
  MCAuto<DataArrayIdType> ret2(ret->invertArrayO2N2N2OBis(nbrOfNodesInUse));
  MCAuto<DataArrayDouble> newCoords(coo->selectByTupleIdSafe(ret2->begin(),ret2->end()));
  MCAuto<DataArrayIdType> newFamCoords;
  MCAuto<DataArrayAsciiChar> newNameCoords;
  if((const DataArrayIdType *)_fam_coords)
    newFamCoords=_fam_coords->selectByTupleIdSafe(ret2->begin(),ret2->end());
  MCAuto<DataArrayIdType> newNumCoords,newGlobalNumCoords;
  if(_num_coords.isNotNull())
    newNumCoords=_num_coords->selectByTupleIdSafe(ret2->begin(),ret2->end());
  if(_global_num_coords.isNotNull())
    newGlobalNumCoords=_global_num_coords->selectByTupleIdSafe(ret2->begin(),ret2->end());
  if(_name_coords.isNotNull())
    newNameCoords=static_cast<DataArrayAsciiChar *>(_name_coords->selectByTupleIdSafe(ret2->begin(),ret2->end()));
  _coords=newCoords; _fam_coords=newFamCoords; _num_coords=newNumCoords; _global_num_coords=newGlobalNumCoords; _name_coords=newNameCoords; _rev_num_coords.nullify();
  for(std::vector< MCAuto<MEDFileUMeshSplitL1> >::iterator it=_ms.begin();it!=_ms.end();it++)
    {
      if((MEDFileUMeshSplitL1*)*it)
        {
          (*it)->renumberNodesInConn(ret->begin());
          (*it)->setCoords(_coords);
        }
    }
  // updates _part_coords
  const PartDefinition *pc(_part_coords);
  if(pc)
    {
      MCAuto<PartDefinition> tmpPD(DataArrayPartDefinition::New(ret2));
      _part_coords=tmpPD->composeWith(pc);
    }
  return ret.retn();
}

/*!
 * This method is the extension of MEDCouplingUMesh::computeFetchedNodeIds. Except that here all levels are considered here.
 * 
 * \return newly allocated array containing all nodes in \a this that are part of nodal connectivity of at least one cell in \a this whatever its level.
 */
DataArrayIdType *MEDFileUMesh::computeFetchedNodeIds() const
{
  std::vector<int> neLevs(this->getNonEmptyLevels());
  std::vector<bool> nodesHighlighted(this->getNumberOfNodes(),false);
  for(auto lev : neLevs)
  {
    const MEDFileUMeshSplitL1 *zeLev(this->getMeshAtLevSafe(lev));
    zeLev->highlightUsedNodes(nodesHighlighted);
  }
  return DataArrayIdType::BuildListOfSwitchedOn(nodesHighlighted);
}

/*!
 * This method is a const method. It computes the minimal set of node ids covered by the cell extraction of \a this.
 * The extraction of \a this is specified by the extractDef \a input map.
 * This map tells for each level of cells, the cells kept in the extraction.
 * 
 * \return - a new reference of DataArrayIdType that represents sorted node ids, the extraction is lying on.
 * \sa MEDFileField1TS::extractPart, MEDFileUMesh::extractPart
 */
DataArrayIdType *MEDFileUMesh::deduceNodeSubPartFromCellSubPart(const std::map<int, MCAuto<DataArrayIdType> >& extractDef) const
{
  std::vector<int> levs(getNonEmptyLevels());
  std::vector<bool> fetchedNodes(getNumberOfNodes(),false);
  for(std::map<int, MCAuto<DataArrayIdType> >::const_iterator it=extractDef.begin();it!=extractDef.end();it++)
    {
      if((*it).first>1)
        throw INTERP_KERNEL::Exception("MEDFileUMesh::deduceNodeSubPartFromCellSubPart : invalid key ! Must be <=1 !");
      if((*it).second.isNull())
        throw INTERP_KERNEL::Exception("MEDFileUMesh::deduceNodeSubPartFromCellSubPart : presence of a value with null pointer !");
      if((*it).first==1)
        continue;
      if(std::find(levs.begin(),levs.end(),(*it).first)==levs.end())
        {
          std::ostringstream oss; oss << "MEDFileUMesh::deduceNodeSubPartFromCellSubPart : invalid level " << (*it).first << " ! Not present in this !";
          throw INTERP_KERNEL::Exception(oss.str());
        }
      MCAuto<MEDCouplingUMesh> m(getMeshAtLevel((*it).first));
      MCAuto<MEDCouplingUMesh> mPart(m->buildPartOfMySelf((*it).second->begin(),(*it).second->end(),true));
      mPart->computeNodeIdsAlg(fetchedNodes);
    }
  return DataArrayIdType::BuildListOfSwitchedOn(fetchedNodes);
}

/*!
 * This method returns a new MEDFileUMesh that is the result of the extraction of cells/nodes in \a this.
 * 
 * \return - a new reference of MEDFileUMesh
 * \sa MEDFileUMesh::deduceNodeSubPartFromCellSubPart, MEDFileFields::extractPart
 */
MEDFileUMesh *MEDFileUMesh::extractPart(const std::map<int, MCAuto<DataArrayIdType> >& extractDef) const
{
  MCAuto<MEDFileUMesh> ret(MEDFileUMesh::New()); ret->setName(getName()); ret->copyFamGrpMapsFrom(*this);
  std::vector<int> levs(getNonEmptyLevels());
  for(std::map<int, MCAuto<DataArrayIdType> >::const_iterator it=extractDef.begin();it!=extractDef.end();it++)
    {
      if((*it).first>1)
        throw INTERP_KERNEL::Exception("MEDFileUMesh::extractPart : invalid key ! Must be <=1 !");
      if((*it).second.isNull())
        throw INTERP_KERNEL::Exception("MEDFileUMesh::extractPart : presence of a value with null pointer !");
      if((*it).first==1)
        continue;
      if(std::find(levs.begin(),levs.end(),(*it).first)==levs.end())
        {
          std::ostringstream oss; oss << "MEDFileUMesh::extractPart : invalid level " << (*it).first << " ! Not present in this !";
          throw INTERP_KERNEL::Exception(oss.str());
        }
      MCAuto<MEDCouplingUMesh> m(getMeshAtLevel((*it).first));
      MCAuto<MEDCouplingUMesh> mPart(m->buildPartOfMySelf((*it).second->begin(),(*it).second->end(),true));
      ret->setMeshAtLevel((*it).first,mPart);
      const DataArrayIdType *fam(getFamilyFieldAtLevel((*it).first)),*num(getNumberFieldAtLevel((*it).first));
      if(fam)
        {
          MCAuto<DataArrayIdType> famPart(fam->selectByTupleIdSafe((*it).second->begin(),(*it).second->end()));
          ret->setFamilyFieldArr((*it).first,famPart);
        }
      if(num)
        {
          MCAuto<DataArrayIdType> numPart(num->selectByTupleIdSafe((*it).second->begin(),(*it).second->end()));
          ret->setFamilyFieldArr((*it).first,numPart);
        }
    }
  std::map<int, MCAuto<DataArrayIdType> >::const_iterator it2(extractDef.find(1));
  if(it2!=extractDef.end())
    {
      const DataArrayDouble *coo(ret->getCoords());
      if(!coo)
        throw INTERP_KERNEL::Exception("MEDFileUMesh::extractPart : trying to extract nodes whereas there is no nodes !");
      MCAuto<DataArrayIdType> o2nNodes(((*it2).second)->invertArrayN2O2O2N(coo->getNumberOfTuples()));
      MCAuto<DataArrayDouble> cooPart(coo->selectByTupleIdSafe((*it2).second->begin(),(*it2).second->end()));
      ret->setCoords(cooPart);
      const DataArrayIdType *fam(getFamilyFieldAtLevel(1)),*num(getNumberFieldAtLevel(1));
      if(fam)
        {
          MCAuto<DataArrayIdType> famPart(fam->selectByTupleIdSafe((*it2).second->begin(),(*it2).second->end()));
          ret->setFamilyFieldArr(1,famPart);
        }
      if(num)
        {
          MCAuto<DataArrayIdType> numPart(num->selectByTupleIdSafe((*it2).second->begin(),(*it2).second->end()));
          ret->setFamilyFieldArr(1,numPart);
        }
      for(std::map<int, MCAuto<DataArrayIdType> >::const_iterator it3=extractDef.begin();it3!=extractDef.end();it3++)
        {
          if((*it3).first==1)
            continue;
          MCAuto<MEDCouplingUMesh> m(ret->getMeshAtLevel((*it3).first));
          m->renumberNodesInConn(o2nNodes->begin());
          ret->setMeshAtLevel((*it3).first,m);
        }
    }
  return ret.retn();
}

/*!
 * This method performs an extrusion along a path defined by \a m1D.
 * \a this is expected to be a mesh with max mesh dimension equal to 2.
 * \a m1D is expected to be a mesh with space dimesion equal to 3 and mesh dimension equal to 1.
 * Mesh dimensions of returned mesh is incremented by one compared to thoose in \a this.
 * This method scans all levels in \a this
 * and put them in the returned mesh. All groups in \a this are also put in the returned mesh.
 *
 * \param [in] m1D - the mesh defining the extrusion path.
 * \param [in] policy - defines the policy of extrusion (see MEDCouplingUMesh::buildExtrudedMesh for more details)
 * \return - a new reference on mesh (you have to deal with using decrRef). The returned mesh will have the same name than \a this.
 *
 * \sa MEDCouplingUMesh::buildExtrudedMesh
 */
MEDFileUMesh *MEDFileUMesh::buildExtrudedMesh(const MEDCouplingUMesh *m1D, int policy) const
{
  checkCartesian();
  if(getMeshDimension()!=2)
    throw INTERP_KERNEL::Exception("MEDFileUMesh::buildExtrudedMesh : this is expected to be with mesh dimension equal to 2 !");
  MCAuto<MEDFileUMesh> ret(MEDFileUMesh::New());
  m1D->checkConsistencyLight();
  if(m1D->getMeshDimension()!=1)
    throw INTERP_KERNEL::Exception("MEDFileUMesh::buildExtrudedMesh : input mesh must have a mesh dimension equal to one !");
  mcIdType nbRep(m1D->getNumberOfCells());
  std::vector<int> levs(getNonEmptyLevels());
  std::vector<std::string> grps(getGroupsNames());
  std::vector< MCAuto<MEDCouplingUMesh> > zeList;
  DataArrayDouble *coords(0);
  std::size_t nbOfLevsOut(levs.size()+1);
  std::vector< MCAuto<DataArrayIdType> > o2ns(nbOfLevsOut);
  for(std::vector<int>::const_iterator lev=levs.begin();lev!=levs.end();lev++)
    {
      MCAuto<MEDCouplingUMesh> item(getMeshAtLevel(*lev));
      item=item->clone(false);
      item->changeSpaceDimension(3+(*lev),0.);//no problem non const but change DataArrayDouble for coordinates do not alter data
      MCAuto<MEDCouplingUMesh> tmp(static_cast<MEDCouplingUMesh *>(m1D->deepCopy()));
      tmp->changeSpaceDimension(3+(*lev),0.);
      MCAuto<MEDCouplingUMesh> elt(item->buildExtrudedMesh(tmp,policy));
      zeList.push_back(elt);
      if(*lev==0)
        coords=elt->getCoords();
    }
  if(!coords)
    throw INTERP_KERNEL::Exception("MEDFileUMesh::buildExtrudedMesh : internal error !");
  for(std::vector< MCAuto<MEDCouplingUMesh> >::iterator it=zeList.begin();it!=zeList.end();it++)
    {
      (*it)->setName(getName());
      (*it)->setCoords(coords);
    }
  for(std::size_t ii=0;ii!=zeList.size();ii++)
    {
      int lev(levs[ii]);
      MCAuto<MEDCouplingUMesh> elt(zeList[ii]);
      if(lev<=-1)
        {
          MCAuto<MEDCouplingUMesh> elt1(getMeshAtLevel(lev+1));
          MCAuto<MEDCouplingUMesh> elt2(elt1->clone(false));
          MCAuto<DataArrayIdType> tmp(elt2->getNodalConnectivity()->deepCopy());
          elt2->setConnectivity(tmp,elt2->getNodalConnectivityIndex());
          elt2->shiftNodeNumbersInConn(nbRep*elt1->getNumberOfNodes());
          elt1->setCoords(elt->getCoords()); elt2->setCoords(elt->getCoords());
          std::vector<const MEDCouplingUMesh *> elts(3);
          elts[0]=elt; elts[1]=elt1; elts[2]=elt2;
          elt=MEDCouplingUMesh::MergeUMeshesOnSameCoords(elts);
          elt->setName(getName());
        }
      //
      o2ns[ii]=elt->sortCellsInMEDFileFrmt();
      ret->setMeshAtLevel(lev,elt);
    }
  MCAuto<MEDCouplingUMesh> endLev(getMeshAtLevel(levs.back())),endLev2;
  endLev=endLev->clone(false); endLev->setCoords(coords);
  MCAuto<DataArrayIdType> tmp(endLev->getNodalConnectivity()->deepCopy());
  endLev2=endLev->clone(false); endLev2->setConnectivity(tmp,endLev->getNodalConnectivityIndex());
  endLev2->shiftNodeNumbersInConn(nbRep*getNumberOfNodes());
  endLev=MEDCouplingUMesh::MergeUMeshesOnSameCoords(endLev,endLev2);
  o2ns[levs.size()]=endLev->sortCellsInMEDFileFrmt();
  endLev->setName(getName());
  ret->setMeshAtLevel(levs.back()-1,endLev);
  //
  for(std::size_t ii=0;ii!=zeList.size();ii++)
    {
      int lev(levs[ii]);
      std::vector< MCAuto<DataArrayIdType> > outGrps;
      std::vector< const DataArrayIdType * > outGrps2;
      if(lev<=-1)
        {
          for(std::vector<std::string>::const_iterator grp=grps.begin();grp!=grps.end();grp++)
            {
              MCAuto<DataArrayIdType> grpArr(getGroupArr(lev+1,*grp));
              if(!grpArr->empty())
                {
                  MCAuto<DataArrayIdType> grpArr1(grpArr->deepCopy()),grpArr2(grpArr->deepCopy());
                  mcIdType offset0(zeList[ii]->getNumberOfCells());
                  mcIdType offset1(offset0+getNumberOfCellsAtLevel(lev+1));
                  grpArr1->applyLin(1,offset0); grpArr2->applyLin(1,offset1);
                  std::ostringstream oss; oss << grpArr2->getName() << "_top";
                  grpArr2->setName(oss.str());
                  grpArr1->transformWithIndArr(o2ns[ii]->begin(),o2ns[ii]->end());
                  grpArr2->transformWithIndArr(o2ns[ii]->begin(),o2ns[ii]->end());
                  outGrps.push_back(grpArr1); outGrps.push_back(grpArr2);
                  outGrps2.push_back(grpArr1); outGrps2.push_back(grpArr2);
                }
            }
        }
      //
      for(std::vector<std::string>::const_iterator grp=grps.begin();grp!=grps.end();grp++)
        {
          MCAuto<DataArrayIdType> grpArr(getGroupArr(lev,*grp));
          if(!grpArr->empty())
            {
              mcIdType nbCellsB4Extrusion(getNumberOfCellsAtLevel(lev));
              std::vector< MCAuto<DataArrayIdType> > grpArrs(nbRep);
              std::vector< const DataArrayIdType *> grpArrs2(nbRep);
              for(int iii=0;iii<nbRep;iii++)
                {
                  grpArrs[iii]=grpArr->deepCopy(); grpArrs[iii]->applyLin(1,iii*nbCellsB4Extrusion);
                  grpArrs2[iii]=grpArrs[iii];
                }
              MCAuto<DataArrayIdType> grpArrExt(DataArrayIdType::Aggregate(grpArrs2));
              grpArrExt->transformWithIndArr(o2ns[ii]->begin(),o2ns[ii]->end());
              std::ostringstream grpName; grpName << *grp << "_extruded";
              grpArrExt->setName(grpName.str());
              outGrps.push_back(grpArrExt);
              outGrps2.push_back(grpArrExt);
            }
        }
      ret->setGroupsAtLevel(lev,outGrps2);
    }
  std::vector< MCAuto<DataArrayIdType> > outGrps;
  std::vector< const DataArrayIdType * > outGrps2;
  for(std::vector<std::string>::const_iterator grp=grps.begin();grp!=grps.end();grp++)
    {
      MCAuto<DataArrayIdType> grpArr1(getGroupArr(levs.back(),*grp));
      if(grpArr1->empty())
        continue;
      MCAuto<DataArrayIdType> grpArr2(grpArr1->deepCopy());
      std::ostringstream grpName; grpName << *grp << "_top";
      grpArr2->setName(grpName.str());
      grpArr2->applyLin(1,getNumberOfCellsAtLevel(levs.back()));
      outGrps.push_back(grpArr1); outGrps.push_back(grpArr2);
      outGrps2.push_back(grpArr1); outGrps2.push_back(grpArr2);
    }
  ret->setGroupsAtLevel(levs.back()-1,outGrps2);
  return ret.retn();
}

/*!
 * This method converts all linear cells in \a this into quadratic cells (following the \a conversionType policy).
 * All the cells converted are put in the returned instance. This method applies all the groups and families in \a this to returned instance.
 * Groups on nodes and families on nodes are copied directly to the returned instance without transformation.
 *
 * \param [in] conversionType - conversionType specifies the type of conversion expected. Only 0 (default) and 1 are supported presently. 0 those that creates the 'most' simple
 *             corresponding quadratic cells. 1 is those creating the 'most' complex.
 * \param [in] eps - detection threshold for coordinates.
 * \return A new instance that is the result of the conversion. The caller has the ownership of this returned instance.
 *
 * \sa MEDCouplingUMesh::convertLinearCellsToQuadratic , quadraticToLinear
 */
MEDFileUMesh *MEDFileUMesh::linearToQuadratic(int conversionType, double eps) const
{
  checkCartesian();
  MCAuto<MEDFileUMesh> ret(MEDFileUMesh::New());
  mcIdType initialNbNodes(getNumberOfNodes());
  MCAuto<MEDCouplingUMesh> m0Tmp(getMeshAtLevel(0));
  MCAuto<MEDCouplingUMesh> m0(dynamic_cast<MEDCouplingUMesh *>(m0Tmp->deepCopy()));
  {
    MCAuto<DataArrayIdType> notUsed(m0->convertLinearCellsToQuadratic(conversionType));
  }
  DataArrayDouble *zeCoords(m0->getCoords());
  ret->setMeshAtLevel(0,m0);
  std::vector<int> levs(getNonEmptyLevels());
  const DataArrayIdType *famField(getFamilyFieldAtLevel(0));
  if(famField)
    {
      MCAuto<DataArrayIdType> famFieldCpy(famField->deepCopy());
      ret->setFamilyFieldArr(0,famFieldCpy);
    }
  famField=getFamilyFieldAtLevel(1);
  if(famField)
    {
      MCAuto<DataArrayIdType> fam(DataArrayIdType::New()); fam->alloc(zeCoords->getNumberOfTuples(),1);
      fam->fillWithZero();
      fam->setPartOfValues1(famField,0,initialNbNodes,1,0,1,1);
      ret->setFamilyFieldArr(1,fam);
    }
  ret->copyFamGrpMapsFrom(*this);
  MCAuto<DataArrayDouble> partZeCoords(zeCoords->selectByTupleIdSafeSlice(initialNbNodes,zeCoords->getNumberOfTuples(),1));
  for(std::vector<int>::const_iterator lev=levs.begin();lev!=levs.end();lev++)
    {
      if(*lev==0)
        continue;
      MCAuto<MEDCouplingUMesh> m1Tmp(getMeshAtLevel(*lev));
      MCAuto<MEDCouplingUMesh> m1(dynamic_cast<MEDCouplingUMesh *>(m1Tmp->deepCopy()));
      if(m1->getMeshDimension()!=0)
        {
          {
            MCAuto<DataArrayIdType> notUsed(m1->convertLinearCellsToQuadratic(conversionType));
          }//kill unused notUsed var
          MCAuto<DataArrayDouble> m1Coords(m1->getCoords()->selectByTupleIdSafeSlice(initialNbNodes,m1->getNumberOfNodes(),1));
          DataArrayIdType *b(0);
          bool a(partZeCoords->areIncludedInMe(m1Coords,eps,b));
          MCAuto<DataArrayIdType> bSafe(b);
          if(!a)
            {
              std::ostringstream oss; oss << "MEDFileUMesh::linearCellsToQuadratic : for level " << *lev << " problem to identify nodes generated !";
              throw INTERP_KERNEL::Exception(oss.str().c_str());
            }
          b->applyLin(1,initialNbNodes);
          MCAuto<DataArrayIdType> l0(DataArrayIdType::New()); l0->alloc(initialNbNodes,1); l0->iota();
          std::vector<const DataArrayIdType *> v(2); v[0]=l0; v[1]=b;
          MCAuto<DataArrayIdType> renum(DataArrayIdType::Aggregate(v));
          m1->renumberNodesInConn(renum->begin());
        }
      m1->setCoords(zeCoords);
      ret->setMeshAtLevel(*lev,m1);
      famField=getFamilyFieldAtLevel(*lev);
      if(famField)
        {
          MCAuto<DataArrayIdType> famFieldCpy(famField->deepCopy());
          ret->setFamilyFieldArr(*lev,famFieldCpy);
        }
    }
  return ret.retn();
}

/*!
 * This method converts all quadratic cells in \a this into linear cells.
 * All the cells converted are put in the returned instance. This method applies all the groups and families in \a this to returned instance.
 * Groups on nodes and families on nodes are copied directly to the returned instance without transformation.
 *
 * \param [in] eps - detection threshold for coordinates.
 * \return A new instance that is the result of the conversion. The caller has the ownership of this returned instance.
 *
 * \sa MEDCouplingUMesh::convertLinearCellsToQuadratic , linearToQuadratic
 */
MEDFileUMesh *MEDFileUMesh::quadraticToLinear(double eps) const
{
  checkCartesian();
  MCAuto<MEDFileUMesh> ret(MEDFileUMesh::New());
  MCAuto<MEDCouplingUMesh> m0Tmp(getMeshAtLevel(0));
  MCAuto<MEDCouplingUMesh> m0(dynamic_cast<MEDCouplingUMesh *>(m0Tmp->deepCopy()));
  m0->convertQuadraticCellsToLinear();
  m0->zipCoords();
  DataArrayDouble *zeCoords(m0->getCoords());
  ret->setMeshAtLevel(0,m0);
  std::vector<int> levs(getNonEmptyLevels());
  const DataArrayIdType *famField(getFamilyFieldAtLevel(0));
  if(famField)
    {
      MCAuto<DataArrayIdType> famFieldCpy(famField->deepCopy());
      ret->setFamilyFieldArr(0,famFieldCpy);
    }
  famField=getFamilyFieldAtLevel(1);
  if(famField)
    {
      MCAuto<DataArrayIdType> fam(famField->selectByTupleIdSafeSlice(0,zeCoords->getNumberOfTuples(),1));
      ret->setFamilyFieldArr(1,fam);
    }
  ret->copyFamGrpMapsFrom(*this);
  for(std::vector<int>::const_iterator lev=levs.begin();lev!=levs.end();lev++)
    {
      if(*lev==0)
        continue;
      MCAuto<MEDCouplingUMesh> m1Tmp(getMeshAtLevel(*lev));
      MCAuto<MEDCouplingUMesh> m1(dynamic_cast<MEDCouplingUMesh *>(m1Tmp->deepCopy()));
      m1->convertQuadraticCellsToLinear();
      m1->zipCoords();
      DataArrayIdType *b(0);
      bool a(zeCoords->areIncludedInMe(m1->getCoords(),eps,b));
      MCAuto<DataArrayIdType> bSafe(b);
      if(!a)
        {
          std::ostringstream oss; oss << "MEDFileUMesh::quadraticToLinear : for level " << *lev << " problem to identify nodes generated !";
          throw INTERP_KERNEL::Exception(oss.str().c_str());
        }
      m1->renumberNodesInConn(b->begin());
      m1->setCoords(zeCoords);
      ret->setMeshAtLevel(*lev,m1);
      famField=getFamilyFieldAtLevel(*lev);
      if(famField)
        {
          MCAuto<DataArrayIdType> famFieldCpy(famField->deepCopy());
          ret->setFamilyFieldArr(*lev,famFieldCpy);
        }
    }
  return ret.retn();
}

/*!
 * Computes the symmetry of \a this.
 * \return a new object.
 */
MCAuto<MEDFileUMesh> MEDFileUMesh::symmetry3DPlane(const double point[3], const double normalVector[3]) const
{
  MCAuto<MEDFileUMesh> ret(deepCopy());
  DataArrayDouble *myCoo(getCoords());
  if(myCoo)
    {
      MCAuto<DataArrayDouble> newCoo(myCoo->symmetry3DPlane(point,normalVector));
      ret->setCoordsForced(newCoo);
    }
  return ret;
}

/*!
 * Aggregate the given MEDFileUMesh objects into a single mesh. When groups are present, those are
 * merged in such a way that the final mesh contain all of them.
 * \return a new object.
 */
MCAuto<MEDFileUMesh> MEDFileUMesh::Aggregate(const std::vector<const MEDFileUMesh *>& meshes)
{
  if(meshes.empty())
    throw INTERP_KERNEL::Exception("MEDFileUMesh::Aggregate : empty input vector !");
  std::size_t sz(meshes.size()),i(0);
  std::vector<const DataArrayDouble *> coos(sz);
  std::vector<const DataArrayIdType *> fam_coos(sz),num_coos(sz);
  for(auto it=meshes.begin();it!=meshes.end();it++,i++)
    {
      if(!(*it))
        throw INTERP_KERNEL::Exception("MEDFileUMesh::Aggregate : presence of NULL pointer in input vector !");
      coos[i]=(*it)->getCoords();
      fam_coos[i]=(*it)->getFamilyFieldAtLevel(1);
      num_coos[i]=(*it)->getNumberFieldAtLevel(1);
    }
  const MEDFileUMesh *ref(meshes[0]);
  int spaceDim(ref->getSpaceDimension()),meshDim(ref->getMeshDimension());
  std::vector<int> levs(ref->getNonEmptyLevels());
  std::map<int, std::vector<const DataArrayIdType *> > m_fam,m_renum;
  std::map<int, std::vector< MCAuto< MEDCouplingUMesh > > > m_mesh2;
  std::map<int, std::vector<const MEDCouplingUMesh *> > m_mesh;
  std::map<std::string,mcIdType> famNumMap;
  std::map<mcIdType, std::string> famNumMap_rev;
  std::map<std::string, std::vector<std::string> > grpFamMap;
  std::set< MCAuto<DataArrayIdType> > mem_cleanup;   // Memory clean-up. At set deletion (end of method), arrays will be deallocated.

  // Identify min family number used:
  mcIdType min_fam_num(0);
  for(const auto& msh : meshes)
    {
      const std::map<std::string,mcIdType>& locMap1(msh->getFamilyInfo());
      for(const auto& it3 : locMap1)
        if(it3.second < min_fam_num)
          min_fam_num = it3.second;
    }

  for(const auto& msh : meshes)
    {
      if(msh->getSpaceDimension()!=spaceDim)
        throw INTERP_KERNEL::Exception("MEDFileUMesh::Aggregate : space dimension must be homogeneous !");
      if(msh->getMeshDimension()!=meshDim)
        throw INTERP_KERNEL::Exception("MEDFileUMesh::Aggregate : mesh dimension must be homogeneous !");
      if(msh->getNonEmptyLevels()!=levs)
        throw INTERP_KERNEL::Exception("MEDFileUMesh::Aggregate : levels must be the same for elements in input vector !");

      const std::map<std::string,mcIdType>& locMap1(msh->getFamilyInfo());
      std::map<std::string, std::string> substitute;
      std::map<mcIdType, mcIdType> substituteN;
      bool fam_conflict(false);
      for(const auto& it3 : locMap1)
        {
          const std::string& famName = it3.first;
          mcIdType famNum = it3.second;
          if (famNumMap_rev.find(famNum) != famNumMap_rev.end()) // Family number is already used!
            {
              // Is it used by a group of the current mesh or a group from a previous mesh?
              // If not, this is OK (typically -1 familly).
              bool used = false;
              //    Current mesh
              const std::map<std::string, std::vector<std::string> >& locMap2(msh->getGroupInfo());
              for(const auto& it4 : locMap2)
                {
                  const auto& famLst = it4.second;
                  if (std::find(famLst.begin(), famLst.end(), famName) != famLst.end())
                    { used = true; break; }
                }
              //    Previous meshes ...
              if (!used)
                for(const auto& it4 : grpFamMap)
                  {
                    const auto& famLst = it4.second;
                    if (std::find(famLst.begin(), famLst.end(), famName) != famLst.end())
                      { used = true; break; }
                  }

              if(used)
                { // Generate a new family name, and a new family number
                  fam_conflict = true;
                  std::ostringstream oss;
                  oss << "Family_" << --min_fam_num;  // New ID
                  std::string new_name(oss.str());
                  substitute[famName] = new_name;
                  substituteN[famNum] = min_fam_num;
                  famNumMap[new_name] = min_fam_num;
                  famNumMap_rev[min_fam_num] = new_name;
                }
            }
          famNumMap[famName] = famNum;
          famNumMap_rev[famNum] = famName;
        }

      for(const auto& level : levs)
        {
          MCAuto<MEDCouplingUMesh> locMesh(msh->getMeshAtLevel(level));
          m_mesh[level].push_back(locMesh); m_mesh2[level].push_back(locMesh);
          m_renum[level].push_back(msh->getNumberFieldAtLevel(level));

          // Family field - substitute new family number if needed:
          if(fam_conflict)
            {
              DataArrayIdType* dai(msh->getFamilyFieldAtLevel(level)->deepCopy());  // Need a copy
              mem_cleanup.insert(MCAuto<DataArrayIdType>(dai));      // Make sure array will decrRef() at end of method
              for (const auto& subN : substituteN)
                dai->changeValue(subN.first, subN.second);
              m_fam[level].push_back(dai);
            }
          else
            m_fam[level].push_back(msh->getFamilyFieldAtLevel(level));      // No copy needed
        }

      const std::map<std::string, std::vector<std::string> >& locMap2(msh->getGroupInfo());
      for(const auto& grpItem : locMap2)
        {
          const std::string& grpName = grpItem.first;
          std::vector<std::string> famLst;
          // Substitute family name in group description if needed:
          if (fam_conflict)
            {
              famLst = grpItem.second;
              for (const auto& sub : substitute)
                std::replace(famLst.begin(), famLst.end(), sub.first, sub.second);
            }
          else
            famLst = grpItem.second;

          // Potentially merge groups (if same name):
          const auto& it = grpFamMap.find(grpName);
          if (it != grpFamMap.end())
            {
              // Group already exists, merge should be done. Normally we whould never
              // have twice the same family name in famLstCur and famLst since we dealt with family number
              // conflict just above ...
              std::vector<std::string>& famLstCur = (*it).second;
              famLstCur.insert(famLstCur.end(), famLst.begin(), famLst.end());
            }
          else
            grpFamMap[grpName] = famLst;
        }
    }
  // Easy part : nodes
  MCAuto<MEDFileUMesh> ret(MEDFileUMesh::New());
  MCAuto<DataArrayDouble> coo(DataArrayDouble::Aggregate(coos));
  ret->setCoords(coo);
  if(std::find(fam_coos.begin(),fam_coos.end(),(const DataArrayIdType *)0)==fam_coos.end())
    {
      MCAuto<DataArrayIdType> fam_coo(DataArrayIdType::Aggregate(fam_coos));
      ret->setFamilyFieldArr(1,fam_coo);
    }
  if(std::find(num_coos.begin(),num_coos.end(),(const DataArrayIdType *)0)==num_coos.end())
    {
      MCAuto<DataArrayIdType> num_coo(DataArrayIdType::Aggregate(num_coos));
      ret->setRenumFieldArr(1,num_coo);
    }
  // cells
  for(const auto& level : levs)
    {
      auto it2(m_mesh.find(level));
      if(it2==m_mesh.end())
        throw INTERP_KERNEL::Exception("MEDFileUMesh::Aggregate : internal error 1 !");
      MCAuto<MEDCouplingUMesh> mesh(MEDCouplingUMesh::MergeUMeshes((*it2).second));
      mesh->setCoords(coo); mesh->setName(ref->getName());
      MCAuto<DataArrayIdType> renum(mesh->sortCellsInMEDFileFrmt());
      ret->setMeshAtLevel(level,mesh);
      auto it3(m_fam.find(level)),it4(m_renum.find(level));
      if(it3==m_fam.end()) // Should never happen (all levels exist for all meshes)
        throw INTERP_KERNEL::Exception("MEDFileUMesh::Aggregate : internal error 2!");
      if(it4==m_renum.end())
        throw INTERP_KERNEL::Exception("MEDFileUMesh::Aggregate : internal error 3!");
      // Set new family field if it was defined for all input meshes
      const std::vector<const DataArrayIdType *>& fams((*it3).second);
      if(std::find(fams.begin(),fams.end(),(const DataArrayIdType *)0)==fams.end())
        {
          MCAuto<DataArrayIdType> famm(DataArrayIdType::Aggregate(fams));
          famm->renumberInPlace(renum->begin());
          ret->setFamilyFieldArr(level,famm);
        }
      // Set optional number field if defined for all input meshes:
      const std::vector<const DataArrayIdType *>& renums((*it4).second);
      if(std::find(renums.begin(),renums.end(),(const DataArrayIdType *)0)==renums.end())
        {
          MCAuto<DataArrayIdType> renumm(DataArrayIdType::Aggregate(renums));
          renumm->renumberInPlace(renum->begin());
          ret->setRenumFieldArr(level,renumm);
        }
    }
  //
  ret->setFamilyInfo(famNumMap);
  ret->setGroupInfo(grpFamMap);
  ret->setName(ref->getName());
  return ret;
}

MEDCouplingMappedExtrudedMesh *MEDFileUMesh::convertToExtrudedMesh() const
{
  if(getMeshDimension()!=3)
    throw INTERP_KERNEL::Exception("MEDFileUMesh::convertToExtrudedMesh : works only for 3D mesh !");
  MCAuto<MEDCouplingUMesh> m3D(getMeshAtLevel(0)),m2D(getMeshAtLevel(-1));
  if(m3D.isNull() || m2D.isNull())
    throw INTERP_KERNEL::Exception("MEDFileUMesh::convertToExtrudedMesh : this must be defined both at level 0 and level -1 !");
  mcIdType zeId(std::numeric_limits<med_int>::max()-getFamilyId(GetSpeStr4ExtMesh()));
  MCAuto<MEDCouplingMappedExtrudedMesh> ret(MEDCouplingMappedExtrudedMesh::New(m3D,m2D,zeId));
  return ret.retn();
}

void MEDFileUMesh::serialize(std::vector<double>& tinyDouble, std::vector<mcIdType>& tinyInt, std::vector<std::string>& tinyStr, std::vector< MCAuto<DataArrayIdType> >& bigArraysI, MCAuto<DataArrayDouble>& bigArrayD)
{
  clearNonDiscrAttributes();
  forceComputationOfParts();
  tinyDouble.clear(); tinyInt.clear(); tinyStr.clear(); bigArraysI.clear(); bigArrayD=0;
  std::vector<mcIdType> layer0;
  layer0.push_back(getAxisType());//0 i
  layer0.push_back(_order); //1 i
  layer0.push_back(_iteration);//2 i
  layer0.push_back(getSpaceDimension());//3 i
  tinyDouble.push_back(_time);//0 d
  tinyStr.push_back(_name);//0 s
  tinyStr.push_back(_desc_name);//1 s
  for(int i=0;i<getSpaceDimension();i++)
    tinyStr.push_back(_coords->getInfoOnComponent(i));
  layer0.push_back(ToIdType(_families.size()));//4 i <- key info aa layer#0
  for(std::map<std::string,mcIdType>::const_iterator it=_families.begin();it!=_families.end();it++)
    {
      tinyStr.push_back((*it).first);
      layer0.push_back((*it).second);
    }
  layer0.push_back((mcIdType)_groups.size());//4+aa i <- key info bb layer#0
  for(std::map<std::string, std::vector<std::string> >::const_iterator it0=_groups.begin();it0!=_groups.end();it0++)
    {
      layer0.push_back(ToIdType((*it0).second.size()));
      tinyStr.push_back((*it0).first);
      for(std::vector<std::string>::const_iterator it1=((*it0).second).begin();it1!=((*it0).second).end();it1++)
        tinyStr.push_back(*it1);
    }
  // sizeof(layer0)==4+aa+1+bb layer#0
  bigArrayD=_coords;// 0 bd
  bigArraysI.push_back(_fam_coords);// 0 bi
  bigArraysI.push_back(_num_coords);// 1 bi
  const PartDefinition *pd(_part_coords);
  if(!pd)
    layer0.push_back(-1);
  else
    {
      std::vector<mcIdType> tmp0;
      pd->serialize(tmp0,bigArraysI);
      tinyInt.push_back(ToIdType(tmp0.size()));
      tinyInt.insert(tinyInt.end(),tmp0.begin(),tmp0.end());
    }
  //
  std::vector<mcIdType> layer1;
  std::vector<int> levs(getNonEmptyLevels());
  layer1.push_back((mcIdType)levs.size());// 0 i <- key
  layer1.insert(layer1.end(),levs.begin(),levs.end());
  for(std::vector<int>::const_iterator it=levs.begin();it!=levs.end();it++)
    {
      const MEDFileUMeshSplitL1 *lev(getMeshAtLevSafe(*it));
      lev->serialize(layer1,bigArraysI);
    }
  // put layers all together.
  tinyInt.push_back(ToIdType(layer0.size()));
  tinyInt.insert(tinyInt.end(),layer0.begin(),layer0.end());
  tinyInt.push_back(ToIdType(layer1.size()));
  tinyInt.insert(tinyInt.end(),layer1.begin(),layer1.end());
}

void MEDFileUMesh::unserialize(std::vector<double>& tinyDouble, std::vector<mcIdType>& tinyInt, std::vector<std::string>& tinyStr,
                               std::vector< MCAuto<DataArrayIdType> >& bigArraysI, MCAuto<DataArrayDouble>& bigArrayD)
{
  mcIdType sz0(tinyInt[0]);
  std::vector<mcIdType> layer0(tinyInt.begin()+1,tinyInt.begin()+1+sz0);
  mcIdType sz1(tinyInt[sz0+1]);
  std::vector<mcIdType> layer1(tinyInt.begin()+2+sz0,tinyInt.begin()+2+sz0+sz1);
  //
  std::reverse(layer0.begin(),layer0.end());
  std::reverse(layer1.begin(),layer1.end());
  std::reverse(tinyDouble.begin(),tinyDouble.end());
  std::reverse(tinyStr.begin(),tinyStr.end());
  std::reverse(bigArraysI.begin(),bigArraysI.end());
  //
  setAxisType((MEDCouplingAxisType)layer0.back()); layer0.pop_back();
  _order=FromIdType<int>(layer0.back()); layer0.pop_back();
  _iteration=FromIdType<int>(layer0.back()); layer0.pop_back();
  mcIdType spaceDim(layer0.back()); layer0.pop_back();
  _time=tinyDouble.back(); tinyDouble.pop_back();
  _name=tinyStr.back(); tinyStr.pop_back();
  _desc_name=tinyStr.back(); tinyStr.pop_back();
  _coords=bigArrayD; _coords->rearrange(spaceDim);
  for(int i=0;i<spaceDim;i++)
    {
      _coords->setInfoOnComponent(i,tinyStr.back());
      tinyStr.pop_back();
    }
  mcIdType nbOfFams(layer0.back()); layer0.pop_back();
  _families.clear();
  for(mcIdType i=0;i<nbOfFams;i++)
    {
      _families[tinyStr.back()]=layer0.back();
      tinyStr.pop_back(); layer0.pop_back();
    }
  mcIdType nbGroups(layer0.back()); layer0.pop_back();
  _groups.clear();
  for(mcIdType i=0;i<nbGroups;i++)
    {
      std::string grpName(tinyStr.back()); tinyStr.pop_back();
      mcIdType nbOfFamsOnGrp(layer0.back()); layer0.pop_back();
      std::vector<std::string> fams(nbOfFamsOnGrp);
      for(mcIdType j=0;j<nbOfFamsOnGrp;j++)
        {
          fams[j]=tinyStr.back(); tinyStr.pop_back();
        }
      _groups[grpName]=fams;
    }
  _fam_coords=bigArraysI.back(); bigArraysI.pop_back();
  _num_coords=bigArraysI.back(); bigArraysI.pop_back();
  _part_coords=0;
  mcIdType isPd(layer0.back()); layer0.pop_back();
  if(isPd!=-1)
    {
      std::vector<mcIdType> tmp0(layer0.begin(),layer0.begin()+isPd);
      layer0.erase(layer0.begin(),layer0.begin()+isPd);
      _part_coords=PartDefinition::Unserialize(tmp0,bigArraysI);
    }
  if(!layer0.empty())
    throw INTERP_KERNEL::Exception("MEDFileUMesh::unserialize : something wrong during unserialization #1 !");
  //
  mcIdType nbLevs(layer1.back()); layer1.pop_back();
  std::vector<mcIdType> levs(layer1.rbegin(),layer1.rbegin()+nbLevs); layer1.erase(layer1.end()-nbLevs,layer1.end());
  _ms.clear();
  mcIdType maxLev(-(*std::min_element(levs.begin(),levs.end())));
  _ms.resize(maxLev+1);
  for(mcIdType i=0;i<nbLevs;i++)
    {
      mcIdType lev(levs[i]);
      mcIdType pos(-lev);
      _ms[pos]=MEDFileUMeshSplitL1::Unserialize(_name,_coords,layer1,bigArraysI);
    }
}

/*!
 * Adds a group of nodes to \a this mesh.
 *  \param [in] ids - a DataArrayIdType providing ids and a name of the group to add.
 *          The ids should be sorted and different each other (MED file norm).
 *
 *  \warning this method can alter default "FAMILLE_ZERO" family.
 *  For users sensitive to this a call to MEDFileMesh::rearrangeFamilies will be necessary after addGroup session.
 *
 *  \throw If the node coordinates array is not set.
 *  \throw If \a ids == \c NULL.
 *  \throw If \a ids->getName() == "".
 *  \throw If \a ids does not respect the MED file norm.
 *  \throw If a group with name \a ids->getName() already exists.
 */
void MEDFileUMesh::addNodeGroup(const DataArrayIdType *ids)
{
  const DataArrayDouble *coords(_coords);
  if(!coords)
    throw INTERP_KERNEL::Exception("MEDFileUMesh::addNodeGroup : no coords set !");
  mcIdType nbOfNodes(coords->getNumberOfTuples());
  if(_fam_coords.isNull())
    { _fam_coords=DataArrayIdType::New(); _fam_coords->alloc(nbOfNodes,1); _fam_coords->fillWithZero(); }
  //
  addGroupUnderground(true,ids,_fam_coords);
}

/*!
 * Adds a group of nodes/cells/faces/edges to \a this mesh.
 *
 *  \param [in] ids - a DataArrayIdType providing ids and a name of the group to add.
 *          The ids should be sorted and different each other (MED file norm).
 *
 * \warning this method can alter default "FAMILLE_ZERO" family.
 * For users sensitive to this a call to MEDFileMesh::rearrangeFamilies will be necessary after addGroup session.
 *
 *  \throw If the node coordinates array is not set.
 *  \throw If \a ids == \c NULL.
 *  \throw If \a ids->getName() == "".
 *  \throw If \a ids does not respect the MED file norm.
 *  \throw If a group with name \a ids->getName() already exists.
 */
void MEDFileUMesh::addGroup(int meshDimRelToMaxExt, const DataArrayIdType *ids)
{
  std::vector<int> levs(getNonEmptyLevelsExt());
  if(std::find(levs.begin(),levs.end(),meshDimRelToMaxExt)==levs.end())
    { 
      std::ostringstream oss; oss << "MEDFileUMesh::addGroup : level " << meshDimRelToMaxExt << " not available ! Should be in ";
      std::copy(levs.begin(),levs.end(),std::ostream_iterator<int>(oss," ")); oss << " !"; throw INTERP_KERNEL::Exception(oss.str().c_str());
    }
  if(meshDimRelToMaxExt==1)
    { addNodeGroup(ids); return ; }
  MEDFileUMeshSplitL1 *lev(getMeshAtLevSafe(meshDimRelToMaxExt));
  DataArrayIdType *fam(lev->getOrCreateAndGetFamilyField());
  addGroupUnderground(false,ids,fam);
}

/*!
 * Changes a name of a family specified by its id.
 *  \param [in] id - the id of the family of interest.
 *  \param [in] newFamName - the new family name.
 *  \throw If no family with the given \a id exists.
 */
void MEDFileUMesh::setFamilyNameAttachedOnId(mcIdType id, const std::string& newFamName)
{
  std::string oldName=getFamilyNameGivenId(id);
  _families.erase(oldName);
  _families[newFamName]=id;
}

/*!
 * Removes a mesh of a given dimension.
 *  \param [in] meshDimRelToMax - the relative dimension of interest.
 *  \throw If there is no mesh at level \a meshDimRelToMax in \a this mesh.
 */
void MEDFileUMesh::removeMeshAtLevel(int meshDimRelToMax)
{
  std::vector<int> levSet=getNonEmptyLevels();
  std::vector<int>::const_iterator it=std::find(levSet.begin(),levSet.end(),meshDimRelToMax);
  if(it==levSet.end())
    throw INTERP_KERNEL::Exception("MEDFileUMesh::removeMeshAtLevel : the requested level is not existing !");
  int pos=(-meshDimRelToMax);
  _ms[pos]=0;
}

/*!
 * Sets a new MEDCoupling1GTUMesh at a given level in \a this mesh.
 *  \param [in] meshDimRelToMax - a relative level to set the mesh at.
 *  \param [in] m - the new mesh to set.
 *  \throw If the name or the description of \a this mesh and \a m are not empty and are
 *         different. 
 *  \throw If the node coordinates array is set \a this in mesh and \a m refers to
 *         another node coordinates array.
 *  \throw If the mesh dimension of \a m does not correspond to \a meshDimRelToMax or
 *         to the existing meshes of other levels of \a this mesh.
 */
void MEDFileUMesh::setMeshAtLevel(int meshDimRelToMax, MEDCoupling1GTUMesh *m)
{
  MCAuto<MEDFileUMeshSplitL1> elt(new MEDFileUMeshSplitL1(m));
  checkAndGiveEntryInSplitL1(meshDimRelToMax,m)=elt;
}

/*!
 * Sets a new MEDCouplingUMesh at a given level in \a this mesh.
 *  \param [in] meshDimRelToMax - a relative level to set the mesh at.
 *  \param [in] m - the new mesh to set.
 *  \param [in] newOrOld - if \c true, cells in \a m are sorted by type to be ready for 
 *         writing \a this mesh in a MED file.
 *  \throw If the name or the description of \a this mesh and \a m are not empty and are
 *         different. 
 *  \throw If the node coordinates array is set \a this in mesh and \a m refers to
 *         another node coordinates array.
 *  \throw If the mesh dimension of \a m does not correspond to \a meshDimRelToMax or
 *         to the existing meshes of other levels of \a this mesh.
 */
void MEDFileUMesh::setMeshAtLevel(int meshDimRelToMax, MEDCouplingUMesh *m, bool newOrOld)
{
  MCAuto<MEDFileUMeshSplitL1> elt(new MEDFileUMeshSplitL1(m,newOrOld));
  checkAndGiveEntryInSplitL1(meshDimRelToMax,m)=elt;
}

MCAuto<MEDFileUMeshSplitL1>& MEDFileUMesh::checkAndGiveEntryInSplitL1(int meshDimRelToMax, MEDCouplingPointSet *m)
{
  dealWithTinyInfo(m);
  std::vector<int> levSet=getNonEmptyLevels();
  if(std::find(levSet.begin(),levSet.end(),meshDimRelToMax)==levSet.end())
    {
      if((DataArrayDouble *)_coords==0)
        {
          DataArrayDouble *c=m->getCoords();
          if(c)
            c->incrRef();
          _coords=c;
        }
      if(m->getCoords()!=_coords)
        throw INTERP_KERNEL::Exception("MEDFileUMesh::setMeshAtLevel : Invalid Given Mesh ! The coordinates are not the same ! try to use tryToShareSameCoords !");
      int sz=(-meshDimRelToMax)+1;
      if(sz>=(int)_ms.size())
        _ms.resize(sz);
      checkMeshDimCoherency(m->getMeshDimension(),meshDimRelToMax);
      return _ms[sz-1];
    }
  else
    return _ms[-meshDimRelToMax];
}

/*!
 * This method allows to set at once the content of different levels in \a this.
 * This method is equivalent to a series of call to MEDFileUMesh::setMeshAtLevel.
 *
 * \param [in] ms - List of unstructured meshes lying on the same coordinates and having different mesh dimesnion.
 * \param [in] renum - the parameter (set to false by default) that tells the beheviour if there is a mesh on \a ms that is not geo type sorted.
 *                     If false, an exception is thrown. If true the mesh is reordered automatically. It is highly recommended to let this parameter to false.
 *
 * \throw If \a there is a null pointer in \a ms.
 * \sa MEDFileUMesh::setMeshAtLevel
 */
void MEDFileUMesh::setMeshes(const std::vector<const MEDCouplingUMesh *>& ms, bool renum)
{
  if(ms.empty())
    return ;
  const MEDCouplingUMesh *mRef=ms[0];
  if(!mRef)
    throw INTERP_KERNEL::Exception("MEDFileUMesh::setMeshes : null instance in the first element of input meshes !");
  std::string name(mRef->getName());
  const DataArrayDouble *coo(mRef->getCoords());
  std::set<int> s;
  int zeDim=-1;
  for(std::vector<const MEDCouplingUMesh *>::const_iterator it=ms.begin();it!=ms.end();it++)
    {
      const MEDCouplingUMesh *cur(*it);
      if(!cur)
        throw INTERP_KERNEL::Exception("MEDFileUMesh::setMeshes : null instance in input vector of meshes !");
      if(coo!=cur->getCoords())
        throw INTERP_KERNEL::Exception("MEDFileUMesh::setMeshes : The input meshes do not share the same coordinates !");
      int mdim=cur->getMeshDimension();
      zeDim=std::max(zeDim,mdim);
      if(s.find(mdim)!=s.end())
        throw INTERP_KERNEL::Exception("MEDFileUMesh::setMeshes : The input meshes must share the same coordinates pointer, and should have different mesh dimension each other !");
    }
  for(std::vector<const MEDCouplingUMesh *>::const_iterator it=ms.begin();it!=ms.end();it++)
    {
      int mdim=(*it)->getMeshDimension();
      setName((*it)->getName());
      setMeshAtLevel(mdim-zeDim,const_cast<MEDCouplingUMesh *>(*it),renum);
    }
  setName(name);
}

/*!
 * Creates one MEDCouplingUMesh at a given level in \a this mesh from a sequence of
 * meshes each representing a group, and creates corresponding groups in \a this mesh.
 * The given meshes must share the same node coordinates array.
 *  \param [in] meshDimRelToMax - the relative dimension to create the mesh and groups at.
 *  \param [in] ms - the sequence of meshes. Each mesh in \a ms represents a group to
 *          create in \a this mesh.
 *  \throw If \a ms is empty.
 *  \throw If dimension of meshes in \a ms does not correspond to \a meshDimRelToMax or
 *         to the existing meshes of other levels of \a this mesh.
 *  \throw If the meshes in \a ms do not share the same node coordinates array.
 *  \throw If the node coordinates array of \a this mesh (if any) is not the same as that
 *         of the given meshes.
 *  \throw If \a ms[ i ] is not well defined (MEDCouplingUMesh::checkConsistencyLight()).
 *  \throw If names of some meshes in \a ms are equal.
 *  \throw If \a ms includes a mesh with an empty name.
 */
void MEDFileUMesh::setGroupsFromScratch(int meshDimRelToMax, const std::vector<const MEDCouplingUMesh *>& ms, bool renum)
{
  if(ms.empty())
    throw INTERP_KERNEL::Exception("MEDFileUMesh::setGroupsFromScratch : expecting a non empty vector !");
  int sz=(-meshDimRelToMax)+1;
  if(sz>=(int)_ms.size())
    _ms.resize(sz);
  checkMeshDimCoherency(ms[0]->getMeshDimension(),meshDimRelToMax);
  DataArrayDouble *coo=checkMultiMesh(ms);
  if((DataArrayDouble *)_coords==0)
    {
      coo->incrRef();
      _coords=coo;
    }
  else
    if((DataArrayDouble *)_coords!=coo)
      throw INTERP_KERNEL::Exception("MEDFileUMesh::setGroupsFromScratch : coordinates mismatches !");
  std::vector<DataArrayIdType *> corr;
  MCAuto<MEDCouplingUMesh> m=MEDCouplingUMesh::FuseUMeshesOnSameCoords(ms,_zipconn_pol,corr);
  std::vector< MCAuto<DataArrayIdType> > corr3(corr.begin(),corr.end());
  setMeshAtLevel(meshDimRelToMax,m,renum);
  std::vector<const DataArrayIdType *> corr2(corr.begin(),corr.end());
  setGroupsAtLevel(meshDimRelToMax,corr2,true);
}

/*!
 * Creates groups at a given level in \a this mesh from a sequence of
 * meshes each representing a group.
 * The given meshes must share the same node coordinates array.
 *  \param [in] meshDimRelToMax - the relative dimension to create the groups at.
 *  \param [in] ms - the sequence of meshes. Each mesh in \a ms represents a group to
 *         create in \a this mesh.
 *  \param [in] renum - if \c true, then the optional numbers of entities are taken into
 *         account. 
 *  \throw If \a ms is empty.
 *  \throw If dimension of meshes in \a ms does not correspond to \a meshDimRelToMax or
 *         to the existing meshes of other levels of \a this mesh.
 *  \throw If the meshes in \a ms do not share the same node coordinates array.
 *  \throw If the node coordinates array of \a this mesh (if any) is not the same as that
 *         of the given meshes.
 *  \throw If \a ms[ i ] is not well defined (MEDCouplingUMesh::checkConsistencyLight()).
 *  \throw If names of some meshes in \a ms are equal.
 *  \throw If \a ms includes a mesh with an empty name.
 */
void MEDFileUMesh::setGroupsOnSetMesh(int meshDimRelToMax, const std::vector<const MEDCouplingUMesh *>& ms, bool renum)
{
  if(ms.empty())
    throw INTERP_KERNEL::Exception("MEDFileUMesh::setGroupsOnSetMesh : expecting a non empty vector !");
  int sz=(-meshDimRelToMax)+1;
  if(sz>=(int)_ms.size())
    _ms.resize(sz);
  checkMeshDimCoherency(ms[0]->getMeshDimension(),meshDimRelToMax);
  DataArrayDouble *coo=checkMultiMesh(ms);
  if((DataArrayDouble *)_coords==0)
    {
      coo->incrRef();
      _coords=coo;
    }
  else
    if((DataArrayDouble *)_coords!=coo)
      throw INTERP_KERNEL::Exception("MEDFileUMesh::setGroupsOnSetMesh : coordinates mismatches !");
  MEDCouplingUMesh *m=getMeshAtLevel(meshDimRelToMax,renum);
  std::vector< MCAuto<DataArrayIdType> > corr(ms.size());
  int i=0;
  for(std::vector<const MEDCouplingUMesh *>::const_iterator it=ms.begin();it!=ms.end();it++,i++)
    {
      DataArrayIdType *arr=0;
      bool test=m->areCellsIncludedIn(*it,_zipconn_pol,arr);
      corr[i]=arr;
      if(!test)
        {
          std::ostringstream oss; oss << "MEDFileUMesh::setGroupsOnSetMesh : mesh #" << i << " is not part of whole mesh !";
          throw INTERP_KERNEL::Exception(oss.str().c_str());
        }
    }
  std::vector<const DataArrayIdType *> corr2(corr.begin(),corr.end());
  setGroupsAtLevel(meshDimRelToMax,corr2,renum);
}

DataArrayDouble *MEDFileUMesh::checkMultiMesh(const std::vector<const MEDCouplingUMesh *>& ms) const
{
  const DataArrayDouble *ret=ms[0]->getCoords();
  int mdim=ms[0]->getMeshDimension();
  for(unsigned int i=1;i<ms.size();i++)
    {
      ms[i]->checkConsistencyLight();
      if(ms[i]->getCoords()!=ret)
        throw INTERP_KERNEL::Exception("MEDFileUMesh::checkMultiMesh : meshes must share the same coords !");
      if(ms[i]->getMeshDimension()!=mdim)
        throw INTERP_KERNEL::Exception("MEDFileUMesh::checkMultiMesh : meshes have not same mesh dimension !");
    }
  return const_cast<DataArrayDouble *>(ret);
}

/*!
 * Sets the family field of a given relative dimension.
 *  \param [in] meshDimRelToMaxExt - the relative dimension of entities for which
 *          the family field is set.
 *  \param [in] famArr - the array of the family field.
 *  \throw If there are no mesh entities of \a meshDimRelToMaxExt dimension in \a this mesh.
 *  \throw If \a famArr has an invalid size.
 */
void MEDFileUMesh::setFamilyFieldArr(int meshDimRelToMaxExt, DataArrayIdType *famArr)
{
  if(meshDimRelToMaxExt==1)
    {
      if(!famArr)
        {
          _fam_coords=0;
          return ;
        }
      DataArrayDouble *coo(_coords);
      if(!coo)
        throw INTERP_KERNEL::Exception("MEDFileUMesh::setFamilyFieldArr : the coordinates have not been set !");
      famArr->checkNbOfTuplesAndComp(coo->getNumberOfTuples(),1,"MEDFileUMesh::setFamilyFieldArr : Problem in size of node family arr ! ");
      _fam_coords.takeRef(famArr);
      return ;
    }
  if(meshDimRelToMaxExt>1)
    throw INTERP_KERNEL::Exception("MEDFileUMesh::setFamilyFieldArr : Dimension request is invalid (>1) !");
  int traducedRk=-meshDimRelToMaxExt;
  if(traducedRk>=(int)_ms.size())
    throw INTERP_KERNEL::Exception("Invalid mesh dim relative to max given ! Too low !");
  if((MEDFileUMeshSplitL1 *)_ms[traducedRk]==0)
    throw INTERP_KERNEL::Exception("On specified lev (or entity) no cells exists !");
  return _ms[traducedRk]->setFamilyArr(famArr);
}

/*!
 * Sets the optional numbers of mesh entities of a given dimension.
 *  \param [in] meshDimRelToMaxExt - the relative dimension of mesh entities.
 *  \param [in] renumArr - the array of the numbers.
 *  \throw If there are no mesh entities of \a meshDimRelToMaxExt dimension in \a this mesh.
 *  \throw If \a renumArr has an invalid size.
 */
void MEDFileUMesh::setRenumFieldArr(int meshDimRelToMaxExt, DataArrayIdType *renumArr)
{
  if(meshDimRelToMaxExt==1)
    {
      if(!renumArr)
        {
          _num_coords.nullify();
          _rev_num_coords.nullify();
          return ;
        }
      if(_coords.isNull())
        throw INTERP_KERNEL::Exception("MEDFileUMesh::setRenumFieldArr : the coordinates have not been set !");
      renumArr->checkNbOfTuplesAndComp(_coords->getNumberOfTuples(),1,"MEDFileUMesh::setRenumArr : Problem in size of node numbering arr ! ");
      _num_coords.takeRef(renumArr);
      return ;
    }
  if(meshDimRelToMaxExt>1)
    throw INTERP_KERNEL::Exception("MEDFileUMesh::setRenumArr : Dimension request is invalid (>1) !");
  int traducedRk=-meshDimRelToMaxExt;
  if(traducedRk>=(int)_ms.size())
    throw INTERP_KERNEL::Exception("Invalid mesh dim relative to max given ! Too low !");
  if((MEDFileUMeshSplitL1 *)_ms[traducedRk]==0)
    throw INTERP_KERNEL::Exception("On specified lev (or entity) no cells exists !");
  return _ms[traducedRk]->setRenumArr(renumArr);
}

/*!
 * Sets the optional names of mesh entities of a given dimension.
 *  \param [in] meshDimRelToMaxExt - the relative dimension of mesh entities.
 *  \param [in] nameArr - the array of the names.
 *  \throw If there are no mesh entities of \a meshDimRelToMaxExt dimension in \a this mesh.
 *  \throw If \a nameArr has an invalid size.
 */
void MEDFileUMesh::setNameFieldAtLevel(int meshDimRelToMaxExt, DataArrayAsciiChar *nameArr)
{
  if(meshDimRelToMaxExt==1)
    {
      if(!nameArr)
        {
          _name_coords=0;
          return ;
        }
      DataArrayDouble *coo(_coords);
      if(!coo)
        throw INTERP_KERNEL::Exception("MEDFileUMesh::setNameFieldAtLevel : the coordinates have not been set !");
      nameArr->checkNbOfTuplesAndComp(coo->getNumberOfTuples(),MED_SNAME_SIZE,"MEDFileUMesh::setNameFieldAtLevel : Problem in size of node numbering arr ! ");
      _name_coords.takeRef(nameArr);
      return ;
    }
  if(meshDimRelToMaxExt>1)
    throw INTERP_KERNEL::Exception("MEDFileUMesh::setNameFieldAtLevel : Dimension request is invalid (>1) !");
  int traducedRk=-meshDimRelToMaxExt;
  if(traducedRk>=(int)_ms.size())
    throw INTERP_KERNEL::Exception("Invalid mesh dim relative to max given ! Too low !");
  if((MEDFileUMeshSplitL1 *)_ms[traducedRk]==0)
    throw INTERP_KERNEL::Exception("On specified lev (or entity) no cells exists !");
  return _ms[traducedRk]->setNameArr(nameArr);
}

void MEDFileUMesh::setGlobalNumFieldAtLevel(int meshDimRelToMaxExt, DataArrayIdType *globalNumArr)
{
  if(meshDimRelToMaxExt!=1)
    throw INTERP_KERNEL::Exception("MEDFileUMesh::setGlobalNumFieldAtLevel : Only implemented for meshDimRelToMaxExt==1 for the moment !");
  if(globalNumArr)
    globalNumArr->checkNbOfTuplesAndComp(_coords->getNumberOfTuples(),1,"MEDFileUMesh::setGlobalNumFieldAtLevel : Problem in size of node global numbering arr ! ");
  _global_num_coords.takeRef(globalNumArr);
}

void MEDFileUMesh::synchronizeTinyInfoOnLeaves() const
{
  for(std::vector< MCAuto<MEDFileUMeshSplitL1> >::const_iterator it=_ms.begin();it!=_ms.end();it++)
    if((const MEDFileUMeshSplitL1 *)(*it))
      (*it)->synchronizeTinyInfo(*this);
}

/*!
 * This method is called by MEDFileMesh::changeFamilyId. It performs only one part of the family id modification.
 */
void MEDFileUMesh::changeFamilyIdArr(mcIdType oldId, mcIdType newId)
{
  DataArrayIdType *arr=_fam_coords;
  if(arr)
    arr->changeValue(oldId,newId);
  for(std::vector< MCAuto<MEDFileUMeshSplitL1> >::iterator it=_ms.begin();it!=_ms.end();it++)
    {
      MEDFileUMeshSplitL1 *sp=(*it);
      if(sp)
        {
          sp->changeFamilyIdArr(oldId,newId);
        }
    }
}

std::list< MCAuto<DataArrayIdType> > MEDFileUMesh::getAllNonNullFamilyIds() const
{
  std::list< MCAuto<DataArrayIdType> > ret;
  const DataArrayIdType *da(_fam_coords);
  if(da)
    { da->incrRef(); ret.push_back(MCAuto<DataArrayIdType>(const_cast<DataArrayIdType *>(da))); }
  for(std::vector< MCAuto<MEDFileUMeshSplitL1> >::const_iterator it=_ms.begin();it!=_ms.end();it++)
    {
      const MEDFileUMeshSplitL1 *elt(*it);
      if(elt)
        {
          da=elt->getFamilyField();
          if(da)
            { da->incrRef(); ret.push_back(MCAuto<DataArrayIdType>(const_cast<DataArrayIdType *>(da))); }
        }
    }
  return ret;
}

void MEDFileUMesh::computeRevNum() const
{
  if(_num_coords.isNotNull())
    {
      mcIdType pos;
      mcIdType maxValue=_num_coords->getMaxValue(pos);
      _rev_num_coords=_num_coords->invertArrayN2O2O2N(maxValue+1);
    }
}

std::size_t MEDFileStructuredMesh::getHeapMemorySizeWithoutChildren() const
{
  return MEDFileMesh::getHeapMemorySizeWithoutChildren();
}

std::vector<const BigMemoryObject *> MEDFileStructuredMesh::getDirectChildrenWithNull() const
{
  std::vector<const BigMemoryObject *> ret(MEDFileMesh::getDirectChildrenWithNull());
  ret.push_back((const DataArrayIdType *)_fam_nodes);
  ret.push_back((const DataArrayIdType *)_num_nodes);
  ret.push_back((const DataArrayAsciiChar *)_names_nodes);
  ret.push_back((const DataArrayIdType *)_fam_cells);
  ret.push_back((const DataArrayIdType *)_num_cells);
  ret.push_back((const DataArrayAsciiChar *)_names_cells);
  ret.push_back((const DataArrayIdType *)_fam_faces);
  ret.push_back((const DataArrayIdType *)_num_faces);
  ret.push_back((const DataArrayIdType *)_rev_num_nodes);
  ret.push_back((const DataArrayAsciiChar *)_names_faces);
  ret.push_back((const DataArrayIdType *)_rev_num_cells);
  ret.push_back((const MEDCoupling1SGTUMesh*)_faces_if_necessary);
  return ret;
}

mcIdType MEDFileStructuredMesh::getMaxAbsFamilyIdInArrays() const
{
  mcIdType ret=-std::numeric_limits<mcIdType>::max(),tmp=-1;
  if((const DataArrayIdType *)_fam_nodes)
    {
      mcIdType val=_fam_nodes->getMaxValue(tmp);
      ret=std::max(ret,std::abs(val));
    }
  if((const DataArrayIdType *)_fam_cells)
    {
      mcIdType val=_fam_cells->getMaxValue(tmp);
      ret=std::max(ret,std::abs(val));
    }
  if((const DataArrayIdType *)_fam_faces)
    {
      mcIdType val=_fam_faces->getMaxValue(tmp);
      ret=std::max(ret,std::abs(val));
    }
  return ret;
}

mcIdType MEDFileStructuredMesh::getMaxFamilyIdInArrays() const
{
  mcIdType ret=-std::numeric_limits<mcIdType>::max(),tmp=-1;
  if((const DataArrayIdType *)_fam_nodes)
    {
      mcIdType val=_fam_nodes->getMaxValue(tmp);
      ret=std::max(ret,val);
    }
  if((const DataArrayIdType *)_fam_cells)
    {
      mcIdType val=_fam_cells->getMaxValue(tmp);
      ret=std::max(ret,val);
    }
  if((const DataArrayIdType *)_fam_faces)
    {
      mcIdType val=_fam_faces->getMaxValue(tmp);
      ret=std::max(ret,val);
    }
  return ret;
}

mcIdType MEDFileStructuredMesh::getMinFamilyIdInArrays() const
{
  mcIdType ret=std::numeric_limits<mcIdType>::max(),tmp=-1;
  if((const DataArrayIdType *)_fam_nodes)
    {
      mcIdType val=_fam_nodes->getMinValue(tmp);
      ret=std::min(ret,val);
    }
  if((const DataArrayIdType *)_fam_cells)
    {
      mcIdType val=_fam_cells->getMinValue(tmp);
      ret=std::min(ret,val);
    }
  if((const DataArrayIdType *)_fam_faces)
    {
      mcIdType val=_fam_faces->getMinValue(tmp);
      ret=std::min(ret,val);
    }
  return ret;
}

bool MEDFileStructuredMesh::isEqual(const MEDFileMesh *other, double eps, std::string& what) const
{
  if(!MEDFileMesh::isEqual(other,eps,what))
    return false;
  const MEDFileStructuredMesh *otherC=dynamic_cast<const  MEDFileStructuredMesh *>(other);
  if(!otherC)
    {
      what="Mesh types differ ! This is structured and other is NOT !";
      return false;
    }
  const DataArrayIdType *famc1=_fam_nodes;
  const DataArrayIdType *famc2=otherC->_fam_nodes;
  if((famc1==0 && famc2!=0) || (famc1!=0 && famc2==0))
    {
      what="Mismatch of families arr on nodes ! One is defined and not other !";
      return false;
    }
  if(famc1)
    {
      bool ret=famc1->isEqual(*famc2);
      if(!ret)
        {
          what="Families arr on nodes differ !";
          return false;
        }
    }
  famc1=_fam_cells;
  famc2=otherC->_fam_cells;
  if((famc1==0 && famc2!=0) || (famc1!=0 && famc2==0))
    {
      what="Mismatch of families arr on cells ! One is defined and not other !";
      return false;
    }
  if(famc1)
    {
      bool ret=famc1->isEqual(*famc2);
      if(!ret)
        {
          what="Families arr on cells differ !";
          return false;
        }
    }
  famc1=_fam_faces;
  famc2=otherC->_fam_faces;
  if((famc1==0 && famc2!=0) || (famc1!=0 && famc2==0))
    {
      what="Mismatch of families arr on faces ! One is defined and not other !";
      return false;
    }
  if(famc1)
    {
      bool ret=famc1->isEqual(*famc2);
      if(!ret)
        {
          what="Families arr on faces differ !";
          return false;
        }
    }
  famc1=_num_nodes;
  famc2=otherC->_num_nodes;
  if((famc1==0 && famc2!=0) || (famc1!=0 && famc2==0))
    {
      what="Mismatch of numbering arr on nodes ! One is defined and not other !";
      return false;
    }
  if(famc1)
    {
      bool ret=famc1->isEqual(*famc2);
      if(!ret)
        {
          what="Numbering arr on nodes differ !";
          return false;
        }
    }
  famc1=_num_cells;
  famc2=otherC->_num_cells;
  if((famc1==0 && famc2!=0) || (famc1!=0 && famc2==0))
    {
      what="Mismatch of numbering arr on cells ! One is defined and not other !";
      return false;
    }
  if(famc1)
    {
      bool ret=famc1->isEqual(*famc2);
      if(!ret)
        {
          what="Numbering arr on cells differ !";
          return false;
        }
    }
  famc1=_num_faces;
  famc2=otherC->_num_faces;
  if((famc1==0 && famc2!=0) || (famc1!=0 && famc2==0))
    {
      what="Mismatch of numbering arr on faces ! One is defined and not other !";
      return false;
    }
  if(famc1)
    {
      bool ret=famc1->isEqual(*famc2);
      if(!ret)
        {
          what="Numbering arr on faces differ !";
          return false;
        }
    }
  const DataArrayAsciiChar *d1=_names_cells;
  const DataArrayAsciiChar *d2=otherC->_names_cells;
  if((d1==0 && d2!=0) || (d1!=0 && d2==0))
    {
      what="Mismatch of naming arr on cells ! One is defined and not other !";
      return false;
    }
  if(d1)
    {
      bool ret=d1->isEqual(*d2);
      if(!ret)
        {
          what="Naming arr on cells differ !";
          return false;
        }
    }
  d1=_names_faces;
  d2=otherC->_names_faces;
  if((d1==0 && d2!=0) || (d1!=0 && d2==0))
    {
      what="Mismatch of naming arr on faces ! One is defined and not other !";
      return false;
    }
  if(d1)
    {
      bool ret=d1->isEqual(*d2);
      if(!ret)
        {
          what="Naming arr on faces differ !";
          return false;
        }
    }
  d1=_names_nodes;
  d2=otherC->_names_nodes;
  if((d1==0 && d2!=0) || (d1!=0 && d2==0))
    {
      what="Mismatch of naming arr on nodes ! One is defined and not other !";
      return false;
    }
  if(d1)
    {
      bool ret=d1->isEqual(*d2);
      if(!ret)
        {
          what="Naming arr on nodes differ !";
          return false;
        }
    }
  return true;
}

void MEDFileStructuredMesh::clearNonDiscrAttributes() const
{
  MEDFileMesh::clearNonDiscrAttributes();
  const DataArrayIdType *tmp=_fam_nodes;
  if(tmp)
    (const_cast<DataArrayIdType *>(tmp))->setName("");
  tmp=_num_nodes;
  if(tmp)
    (const_cast<DataArrayIdType *>(tmp))->setName("");
  tmp=_fam_cells;
  if(tmp)
    (const_cast<DataArrayIdType *>(tmp))->setName("");
  tmp=_num_cells;
  if(tmp)
    (const_cast<DataArrayIdType *>(tmp))->setName("");
  tmp=_fam_faces;
  if(tmp)
    (const_cast<DataArrayIdType *>(tmp))->setName("");
  tmp=_num_faces;
  if(tmp)
    (const_cast<DataArrayIdType *>(tmp))->setName("");
}

/*!
 * Returns ids of mesh entities contained in given families of a given dimension.
 *  \param [in] meshDimRelToMaxExt - a relative dimension of the mesh entities whose ids
 *          are required.
 *  \param [in] fams - the names of the families of interest.
 *  \param [in] renum - if \c true, the optional numbers of entities, if available, are
 *          returned instead of ids.
 *  \return DataArrayIdType * - a new instance of DataArrayIdType holding either ids or
 *          numbers, if available and required, of mesh entities of the families. The caller
 *          is to delete this array using decrRef() as it is no more needed. 
 *  \throw If the family field is missing for \a meshDimRelToMaxExt.
 */
DataArrayIdType *MEDFileStructuredMesh::getFamiliesArr(int meshDimRelToMaxExt, const std::vector<std::string>& fams, bool renum) const
{
  std::vector<mcIdType> famIds(getFamiliesIds(fams));
  switch(meshDimRelToMaxExt)
  {
    case 1:
      {
        if((const DataArrayIdType *)_fam_nodes)
          {
            MCAuto<DataArrayIdType> da;
            if(!famIds.empty())
              da=_fam_nodes->findIdsEqualList(&famIds[0],&famIds[0]+famIds.size());
            else
              da=_fam_nodes->findIdsEqualList(0,0);
            if(renum)
              return MEDFileUMeshSplitL1::Renumber(_num_nodes,da);
            else
              return da.retn();
          }
        else
          throw INTERP_KERNEL::Exception("MEDFileStructuredMesh::getFamiliesArr : no family array specified on nodes !");
        break;
      }
    case 0:
      {
        if((const DataArrayIdType *)_fam_cells)
          {
            MCAuto<DataArrayIdType> da;
            if(!famIds.empty())
              da=_fam_cells->findIdsEqualList(&famIds[0],&famIds[0]+famIds.size());
            else
              da=_fam_cells->findIdsEqualList(0,0);
            if(renum)
              return MEDFileUMeshSplitL1::Renumber(_num_cells,da);
            else
              return da.retn();
          }
        else
          throw INTERP_KERNEL::Exception("MEDFileStructuredMesh::getFamiliesArr : no family array specified on cells !");
        break;
      }
    case -1:
      {
        if((const DataArrayIdType *)_fam_faces)
          {
            MCAuto<DataArrayIdType> da;
            if(!famIds.empty())
              da=_fam_faces->findIdsEqualList(&famIds[0],&famIds[0]+famIds.size());
            else
              da=_fam_faces->findIdsEqualList(0,0);
            if(renum)
              return MEDFileUMeshSplitL1::Renumber(_num_faces,da);
            else
              return da.retn();
          }
        else
          throw INTERP_KERNEL::Exception("MEDFileStructuredMesh::getFamiliesArr : no family array specified on faces !");
        break;
      }
    default:
      throw INTERP_KERNEL::Exception("MEDFileStructuredMesh::getFamiliesArr : input meshDimRelative must be in [0,1,-1] !");
  }
  throw INTERP_KERNEL::Exception("MEDFileStructuredMesh::getFamiliesArr : unmanaged case !");
}

/*!
 * Sets the family field of a given relative dimension.
 *  \param [in] meshDimRelToMaxExt - the relative dimension of entities for which
 *          the family field is set.
 *  \param [in] famArr - the array of the family field.
 *  \throw If there are no mesh entities of \a meshDimRelToMaxExt dimension in \a this mesh.
 *  \throw If \a famArr has an invalid size.
 *  \throw If \a meshDimRelToMaxExt != 0 and \a meshDimRelToMaxExt != 1 and \a meshDimRelToMaxExt != -1.
 */
void MEDFileStructuredMesh::setFamilyFieldArr(int meshDimRelToMaxExt, DataArrayIdType *famArr)
{
  const MEDCouplingStructuredMesh *mesh(getStructuredMesh());
  if(!mesh)
    throw INTERP_KERNEL::Exception("MEDFileStructuredMesh::setFamilyFieldArr : no structured mesh specified ! Impossible to set family array !");
  switch(meshDimRelToMaxExt)
  {
    case 0:
      {
        mcIdType nbCells(mesh->getNumberOfCells());
        if(famArr)
          famArr->checkNbOfTuplesAndComp(nbCells,1,"MEDFileStructuredMesh::setFamilyFieldArr : Problem in size of Family arr ! Mismatch with number of cells of mesh !");
        _fam_cells=famArr;
        break;
      }
    case 1:
      {
        mcIdType nbNodes(mesh->getNumberOfNodes());
        if(famArr)
          famArr->checkNbOfTuplesAndComp(nbNodes,1,"MEDFileStructuredMesh::setFamilyFieldArr : Problem in size of Family arr ! Mismatch with number of nodes of mesh !");
        _fam_nodes=famArr;
        break;
      }
    case -1:
      {
        mcIdType nbCells(mesh->getNumberOfCellsOfSubLevelMesh());
        if(famArr)
          famArr->checkNbOfTuplesAndComp(nbCells,1,"MEDFileStructuredMesh::setFamilyFieldArr : Problem in size of Family arr ! Mismatch with number of faces of mesh !");
        _fam_faces=famArr;
        break;
      }
    default:
      throw INTERP_KERNEL::Exception("MEDFileStructuredMesh::setFamilyFieldArr : Only available for levels 0 or 1 or -1 !");
  }
  if(famArr)
    famArr->incrRef();
}

/*!
 * Sets the optional numbers of mesh entities of a given dimension.
 *  \param [in] meshDimRelToMaxExt - the relative dimension of mesh entities.
 *  \param [in] renumArr - the array of the numbers.
 *  \throw If there are no mesh entities of \a meshDimRelToMaxExt dimension in \a this mesh.
 *  \throw If \a renumArr has an invalid size.
 *  \throw If \a meshDimRelToMaxExt != 0 and \a meshDimRelToMaxExt != 1.
 */
void MEDFileStructuredMesh::setRenumFieldArr(int meshDimRelToMaxExt, DataArrayIdType *renumArr)
{
  const MEDCouplingStructuredMesh *mesh=getStructuredMesh();
  if(!mesh)
    throw INTERP_KERNEL::Exception("MEDFileStructuredMesh::setRenumFieldArr : no structured mesh specified ! Impossible to set number array !");
  switch(meshDimRelToMaxExt)
  {
    case 0:
      {
        mcIdType nbCells=mesh->getNumberOfCells();
        renumArr->checkNbOfTuplesAndComp(nbCells,1,"MEDFileStructuredMesh::setRenumFieldArr : Problem in size of Renum arr ! Mismatch with number of cells of mesh !");
        _num_cells=renumArr;
        break;
      }
    case 1:
      {
        mcIdType nbNodes=mesh->getNumberOfNodes();
        renumArr->checkNbOfTuplesAndComp(nbNodes,1,"MEDFileStructuredMesh::setRenumFieldArr : Problem in size of Family arr ! Mismatch with number of nodes of mesh !");
        _num_nodes=renumArr;
        break;
      }
    case -1:
      {
        mcIdType nbCells=mesh->getNumberOfCellsOfSubLevelMesh();
        renumArr->checkNbOfTuplesAndComp(nbCells,1,"MEDFileStructuredMesh::setRenumFieldArr : Problem in size of Renum arr ! Mismatch with number of faces of mesh !");
        _num_faces=renumArr;
        break;
      }
    default:
      throw INTERP_KERNEL::Exception("MEDFileStructuredMesh::setRenumFieldArr : Only available for levels 0 or 1 or -1 !");
  }
  if(renumArr)
    renumArr->incrRef();
}

/*!
 * Sets the optional names of mesh entities of a given dimension.
 *  \param [in] meshDimRelToMaxExt - the relative dimension of mesh entities.
 *  \param [in] nameArr - the array of the names.
 *  \throw If there are no mesh entities of \a meshDimRelToMaxExt dimension in \a this mesh.
 *  \throw If \a nameArr has an invalid size.
 */
void MEDFileStructuredMesh::setNameFieldAtLevel(int meshDimRelToMaxExt, DataArrayAsciiChar *nameArr)
{
  const MEDCouplingStructuredMesh *mesh(getStructuredMesh());
  if(!mesh)
    throw INTERP_KERNEL::Exception("MEDFileStructuredMesh::setNameFieldAtLevel : no structured mesh specified ! Impossible to set names array !");
  switch(meshDimRelToMaxExt)
  {
    case 0:
      {
        mcIdType nbCells=mesh->getNumberOfCells();
        nameArr->checkNbOfTuplesAndComp(nbCells,MED_SNAME_SIZE,"MEDFileStructuredMesh::setNameFieldAtLevel : Problem in size of names arr ! Mismatch with number of cells of mesh !");
        _names_cells=nameArr;
        break;
      }
    case 1:
      {
        mcIdType nbNodes=mesh->getNumberOfNodes();
        nameArr->checkNbOfTuplesAndComp(nbNodes,MED_SNAME_SIZE,"MEDFileStructuredMesh::setNameFieldAtLevel : Problem in size of names arr ! Mismatch with number of nodes of mesh !");
        _names_nodes=nameArr;
        break;
      }
    case -1:
      {
        mcIdType nbCells=mesh->getNumberOfCellsOfSubLevelMesh();
        nameArr->checkNbOfTuplesAndComp(nbCells,MED_SNAME_SIZE,"MEDFileStructuredMesh::setNameFieldAtLevel : Problem in size of names arr ! Mismatch with number of faces of mesh !");
        _names_faces=nameArr;
        break;
      }
    default:
      throw INTERP_KERNEL::Exception("MEDFileStructuredMesh::setNameFieldAtLevel : Only available for levels 0 or 1 or -1 !");
  }
  if(nameArr)
    nameArr->incrRef();
}

void MEDFileStructuredMesh::setGlobalNumFieldAtLevel(int meshDimRelToMaxExt, DataArrayIdType *globalNumArr)
{
  throw INTERP_KERNEL::Exception("MEDFileStructuredMesh::setGlobalNumFieldAtLevel : not implemented yet !");
}

/*!
 * Adds a group of nodes to \a this mesh.
 *  \param [in] ids - a DataArrayIdType providing ids and a name of the group to add.
 *          The ids should be sorted and different each other (MED file norm).
 *
 *  \warning this method can alter default "FAMILLE_ZERO" family.
 *  For users sensitive to this a call to MEDFileMesh::rearrangeFamilies will be necessary after addGroup session.
 *
 *  \throw If the node coordinates array is not set.
 *  \throw If \a ids == \c NULL.
 *  \throw If \a ids->getName() == "".
 *  \throw If \a ids does not respect the MED file norm.
 *  \throw If a group with name \a ids->getName() already exists.
 */
void MEDFileStructuredMesh::addNodeGroup(const DataArrayIdType *ids)
{
  addGroup(1,ids);
}

/*!
 * Adds a group of nodes/cells/faces/edges to \a this mesh.
 *
 *  \param [in] ids - a DataArrayIdType providing ids and a name of the group to add.
 *          The ids should be sorted and different each other (MED file norm).
 *
 * \warning this method can alter default "FAMILLE_ZERO" family.
 * For users sensitive to this a call to MEDFileMesh::rearrangeFamilies will be necessary after addGroup session.
 *
 *  \throw If the node coordinates array is not set.
 *  \throw If \a ids == \c NULL.
 *  \throw If \a ids->getName() == "".
 *  \throw If \a ids does not respect the MED file norm.
 *  \throw If a group with name \a ids->getName() already exists.
 */
void MEDFileStructuredMesh::addGroup(int meshDimRelToMaxExt, const DataArrayIdType *ids)
{
  DataArrayIdType *fam(getOrCreateAndGetFamilyFieldAtLevel(meshDimRelToMaxExt));
  addGroupUnderground(false,ids,fam);
  return ;
}

/*!
 * Returns the family field for mesh entities of a given dimension.
 *  \param [in] meshDimRelToMaxExt - the relative dimension of mesh entities.
 *  \return const DataArrayIdType * - the family field. It is an array of ids of families
 *          each mesh entity belongs to. It can be \c NULL.
 *  \throw If \a meshDimRelToMaxExt != 0 and \a meshDimRelToMaxExt != 1.
 */
const DataArrayIdType *MEDFileStructuredMesh::getFamilyFieldAtLevel(int meshDimRelToMaxExt) const
{
  switch(meshDimRelToMaxExt)
  {
    case 0:
      return _fam_cells;
    case 1:
      return _fam_nodes;
    case -1:
      return _fam_faces;
    default:
      throw INTERP_KERNEL::Exception("MEDFileStructuredMesh::getFamilyFieldAtLevel : Only available for levels 0 or 1 or -1 !");
  }
}

/*!
 * Returns the family field for mesh entities of a given dimension.
 *  \param [in] meshDimRelToMaxExt - the relative dimension of mesh entities.
 *  \return const DataArrayIdType * - the family field. It is an array of ids of families
 *          each mesh entity belongs to. It can be \c NULL.
 *  \throw If \a meshDimRelToMaxExt != 0 and \a meshDimRelToMaxExt != 1.
 */
DataArrayIdType *MEDFileStructuredMesh::getFamilyFieldAtLevel(int meshDimRelToMaxExt)
{
  switch(meshDimRelToMaxExt)
  {
    case 0:
      return _fam_cells;
    case 1:
      return _fam_nodes;
    case -1:
      return _fam_faces;
    default:
      throw INTERP_KERNEL::Exception("MEDFileStructuredMesh::getFamilyFieldAtLevel : Only available for levels 0 or 1 or -1 !");
  }
}

/*!
 * Returns the optional numbers of mesh entities of a given dimension.
 *  \param [in] meshDimRelToMaxExt - the relative dimension of mesh entities.
 *  \return const DataArrayIdType * - the array of the entity numbers.
 *  \throw If there are no mesh entities of \a meshDimRelToMaxExt dimension in \a this mesh.
 *  \throw If \a meshDimRelToMaxExt != 0 and \a meshDimRelToMaxExt != 1.
 */
const DataArrayIdType *MEDFileStructuredMesh::getNumberFieldAtLevel(int meshDimRelToMaxExt) const
{
  switch(meshDimRelToMaxExt)
  {
    case 0:
      return _num_cells;
    case 1:
      return _num_nodes;
    case -1:
      return _num_faces;
    default:
      throw INTERP_KERNEL::Exception("MEDFileStructuredMesh::getNumberFieldAtLevel : Only available for levels 0 or 1 or -1 !");
  }
}

/*!
 * Returns the optional numbers of mesh entities of a given dimension transformed using
 * DataArrayIdType::invertArrayN2O2O2N().
 *  \param [in] meshDimRelToMaxExt - the relative dimension of mesh entities.
 *  \return const DataArrayIdType * - the array of the entity numbers transformed using
 *          DataArrayIdType::invertArrayN2O2O2N().
 *  \throw If \a meshDimRelToMaxExt != 0 and \a meshDimRelToMaxExt != 1.
 *  \throw If there are no mesh entities of \a meshDimRelToMaxExt dimension in \a this mesh.
 */
const DataArrayIdType *MEDFileStructuredMesh::getRevNumberFieldAtLevel(int meshDimRelToMaxExt) const
{
  if(meshDimRelToMaxExt!=0 && meshDimRelToMaxExt!=1)
    throw INTERP_KERNEL::Exception("MEDFileStructuredMesh::getRevNumberFieldAtLevel : Only available for levels 0 or 1 !");
  if(meshDimRelToMaxExt==0)
    {
      if((const DataArrayIdType *)_num_cells)
        {
          mcIdType pos;
          mcIdType maxValue=_num_cells->getMaxValue(pos);
          _rev_num_cells=_num_cells->invertArrayN2O2O2N(maxValue+1);
          return _rev_num_cells;
        }
      else
        throw INTERP_KERNEL::Exception("MEDFileCMesh::getRevNumberFieldAtLevel : no cell renumbering for a request on reverse numbering !");
    }
  else
    {
      if((const DataArrayIdType *)_num_nodes)
        {
          mcIdType pos;
          mcIdType maxValue=_num_nodes->getMaxValue(pos);
          _rev_num_nodes=_num_nodes->invertArrayN2O2O2N(maxValue+1);
          return _rev_num_nodes;
        }
      else
        throw INTERP_KERNEL::Exception("MEDFileCMesh::getRevNumberFieldAtLevel : no node renumbering for a request on reverse numbering !");
    }
}

const DataArrayAsciiChar *MEDFileStructuredMesh::getNameFieldAtLevel(int meshDimRelToMaxExt) const
{
  switch(meshDimRelToMaxExt)
  {
    case 0:
      return _names_cells;
    case 1:
      return _names_nodes;
    case -1:
      return _names_faces;
    default:
      throw INTERP_KERNEL::Exception("MEDFileStructuredMesh::getNameFieldAtLevel : Only available for levels 0 or 1 or -1 !");
  }
}

MCAuto<DataArrayIdType> MEDFileStructuredMesh::getGlobalNumFieldAtLevel(int meshDimRelToMaxExt) const
{
  throw INTERP_KERNEL::Exception("MEDFileStructuredMesh::getGlobalNumFieldAtLevel : not implemented yet for structured mesh !");
}

/*!
 * Returns relative dimensions of mesh entities (excluding nodes) present in \a this mesh.
 *  \return std::vector<int> - a sequence of the relative dimensions: [0].
 */
std::vector<int> MEDFileStructuredMesh::getNonEmptyLevels() const
{
  std::vector<int> ret(1);
  return ret;
}

/*!
 * Returns relative dimensions of mesh entities (including nodes) present in \a this mesh.
 *  \return std::vector<int> - a sequence of the relative dimensions: [1,0].
 */
std::vector<int> MEDFileStructuredMesh::getNonEmptyLevelsExt() const
{
  std::vector<int> ret(2);
  ret[0]=1;
  return ret;
}

/*!
 * Returns the set of extensive levels (nodes included) where not NULL family arr are defined.
 */
std::vector<int> MEDFileStructuredMesh::getFamArrNonEmptyLevelsExt() const
{
  std::vector<int> ret;
  const DataArrayIdType *famNodes(_fam_nodes),*famCells(_fam_cells),*famFaces(_fam_faces);
  if(famNodes)
    ret.push_back(1);
  if(famCells)
    ret.push_back(0);
  if(famFaces)
    ret.push_back(-1);
  return ret;
}

/*!
 * Returns the set of extensive levels (nodes included) where not NULL numbering arr are defined.
 */
std::vector<int> MEDFileStructuredMesh::getNumArrNonEmptyLevelsExt() const
{
  std::vector<int> ret;
  const DataArrayIdType *numNodes(_num_nodes),*numCells(_num_cells),*numFaces(_num_faces);
  if(numNodes)
    ret.push_back(1);
  if(numCells)
    ret.push_back(0);
  if(numFaces)
    ret.push_back(-1);
  return ret;
}

/*!
 * Returns the set of extensive levels (nodes included) where not NULL naming arr are defined.
 */
std::vector<int> MEDFileStructuredMesh::getNameArrNonEmptyLevelsExt() const
{
  std::vector<int> ret;
  const DataArrayAsciiChar *namesNodes(_names_nodes),*namesCells(_names_cells),*namesFaces(_names_faces);
  if(namesNodes)
    ret.push_back(1);
  if(namesCells)
    ret.push_back(0);
  if(namesFaces)
    ret.push_back(-1);
  return ret;
}

/*!
 * no implementation here, it is not a bug, but intresically no polyhedra in \a this.
 */
bool MEDFileStructuredMesh::unPolyze(std::vector<mcIdType>& oldCode, std::vector<mcIdType>& newCode, DataArrayIdType *& o2nRenumCell)
{
  oldCode.clear(); newCode.clear(); o2nRenumCell=0;
  return false;
}

void MEDFileStructuredMesh::changeFamilyIdArr(mcIdType oldId, mcIdType newId)
{
  DataArrayIdType *arr=_fam_nodes;
  if(arr)
    arr->changeValue(oldId,newId);
  arr=_fam_cells;
  if(arr)
    arr->changeValue(oldId,newId);
  arr=_fam_faces;
  if(arr)
    arr->changeValue(oldId,newId);
}

std::list< MCAuto<DataArrayIdType> > MEDFileStructuredMesh::getAllNonNullFamilyIds() const
{
  std::list< MCAuto<DataArrayIdType> > ret;
  const DataArrayIdType *da(_fam_nodes);
  if(da)
    { da->incrRef(); ret.push_back(MCAuto<DataArrayIdType>(const_cast<DataArrayIdType *>(da))); }
  da=_fam_cells;
  if(da)
    { da->incrRef(); ret.push_back(MCAuto<DataArrayIdType>(const_cast<DataArrayIdType *>(da))); }
  da=_fam_faces;
  if(da)
    { da->incrRef(); ret.push_back(MCAuto<DataArrayIdType>(const_cast<DataArrayIdType *>(da))); }
  return ret;
}

void MEDFileStructuredMesh::deepCpyAttributes()
{
  if((const DataArrayIdType*)_fam_nodes)
    _fam_nodes=_fam_nodes->deepCopy();
  if((const DataArrayIdType*)_num_nodes)
    _num_nodes=_num_nodes->deepCopy();
  if((const DataArrayAsciiChar*)_names_nodes)
    _names_nodes=_names_nodes->deepCopy();
  if((const DataArrayIdType*)_fam_cells)
    _fam_cells=_fam_cells->deepCopy();
  if((const DataArrayIdType*)_num_cells)
    _num_cells=_num_cells->deepCopy();
  if((const DataArrayAsciiChar*)_names_cells)
    _names_cells=_names_cells->deepCopy();
  if((const DataArrayIdType*)_fam_faces)
    _fam_faces=_fam_faces->deepCopy();
  if((const DataArrayIdType*)_num_faces)
    _num_faces=_num_faces->deepCopy();
  if((const DataArrayAsciiChar*)_names_faces)
    _names_faces=_names_faces->deepCopy();
  if((const DataArrayIdType*)_rev_num_nodes)
    _rev_num_nodes=_rev_num_nodes->deepCopy();
  if((const DataArrayIdType*)_rev_num_cells)
    _rev_num_cells=_rev_num_cells->deepCopy();
}

/*!
 * Returns a pointer to mesh at the specified level (here 0 is compulsory for cartesian mesh).
 * 
 * \return a pointer to cartesian mesh that need to be managed by the caller.
 * \warning the returned pointer has to be managed by the caller.
 */

/*!
 * Returns a pointer to MEDCouplingStructuredMesh held by \a this. 
 *  \param [in] meshDimRelToMax - it must be \c 0 or \c -1.
 *  \param [in] renum - it must be \c false.
 *  \return MEDCouplingMesh * - a pointer to MEDCouplingMesh that the caller is to
 *          delete using decrRef() as it is no more needed. 
 */
MEDCouplingMesh *MEDFileStructuredMesh::getMeshAtLevel(int meshDimRelToMax, bool renum) const
{
  checkCartesian();
  if(renum)
    throw INTERP_KERNEL::Exception("MEDFileCurveLinearMesh does not support renumbering ! To do it perform request of renum array directly !");
  const MEDCouplingStructuredMesh *m(getStructuredMesh());
  switch(meshDimRelToMax)
  {
    case 0:
      {
        if(m)
          m->incrRef();
        return const_cast<MEDCouplingStructuredMesh *>(m);
      }
    case -1:
      {
        if(!m)
          throw INTERP_KERNEL::Exception("MEDFileStructuredMesh::getMeshAtLevel : level -1 requested must be non empty to be able to compute unstructured sub mesh !");
        buildMinusOneImplicitPartIfNeeded();
        MEDCoupling1SGTUMesh *ret(_faces_if_necessary);
        if(ret)
          ret->incrRef();
        return ret;
      }
    default:
      throw INTERP_KERNEL::Exception("MEDFileCurveLinearMesh does not support multi level for mesh 0 expected as input !");
  }
}

/*!
 * Returns all relative mesh levels (**excluding nodes**) where given families are defined.
 * To include nodes, call getFamsNonEmptyLevelsExt() method.
 *  \param [in] fams - the name of the family of interest.
 *  \return std::vector<int> - a sequence of the relative dimensions.
 */
std::vector<mcIdType> MEDFileStructuredMesh::getFamsNonEmptyLevels(const std::vector<std::string>& fams) const
{
  std::vector<mcIdType> lvls;
  std::vector<mcIdType> famIds(getFamiliesIds(fams));
  const DataArrayIdType *famCells(_fam_cells),*famFaces(_fam_faces);
  if(famCells && famCells->presenceOfValue(famIds))
    lvls.push_back(0);
  if(famFaces && famFaces->presenceOfValue(famIds))
    lvls.push_back(-1);
  return lvls;
}

/*!
 * Returns all relative mesh levels (including nodes) where given families are defined.
 *  \param [in] fams - the names of the families of interest.
 *  \return std::vector<int> - a sequence of the relative dimensions.
 */
std::vector<mcIdType> MEDFileStructuredMesh::getFamsNonEmptyLevelsExt(const std::vector<std::string>& fams) const
{
  std::vector<mcIdType> lvls(getFamsNonEmptyLevels(fams));
  std::vector<mcIdType> famIds(getFamiliesIds(fams));
  const DataArrayIdType *famNodes(_fam_nodes);
  if(famNodes && famNodes->presenceOfValue(famIds))
    lvls.push_back(1);
  return lvls;
}

/*!
 * Returns number of mesh entities of a given relative dimension in \a this mesh.
 *  \param [in] meshDimRelToMaxExt - the relative dimension of interest.
 *  \return mcIdType - the number of entities.
 *  \throw If no mesh entities of dimension \a meshDimRelToMaxExt are available in \a this mesh.
 */
mcIdType MEDFileStructuredMesh::getSizeAtLevel(int meshDimRelToMaxExt) const
{
  const MEDCouplingStructuredMesh *cmesh(getStructuredMesh());
  if(!cmesh)
    throw INTERP_KERNEL::Exception("MEDFileStructuredMesh::getSizeAtLevel : No structured mesh set !");
  switch(meshDimRelToMaxExt)
  {
    case 0:
      return cmesh->getNumberOfCells();
    case 1:
      return cmesh->getNumberOfNodes();
    case -1:
      return cmesh->getNumberOfCellsOfSubLevelMesh();
    default:
      throw INTERP_KERNEL::Exception("MEDFileStructuredMesh::getSizeAtLevel : Only available for levels 0 or 1 or -1 !");
  }
}

mcIdType MEDFileStructuredMesh::getNumberOfNodes() const
{
  const MEDCouplingStructuredMesh *cmesh(getStructuredMesh());
  if(!cmesh)
    throw INTERP_KERNEL::Exception("MEDFileStructuredMesh::getNumberOfNodes : no cartesian mesh set !");
  return cmesh->getNumberOfNodes();
}

mcIdType MEDFileStructuredMesh::getNumberOfCellsAtLevel(int meshDimRelToMaxExt) const
{
  const MEDCouplingStructuredMesh *cmesh(getStructuredMesh());
  if(!cmesh)
    throw INTERP_KERNEL::Exception("MEDFileStructuredMesh::getNumberOfNodes : no cartesian mesh set !");
  switch(meshDimRelToMaxExt)
  {
    case 0:
      return cmesh->getNumberOfCells();
    case -1:
      return cmesh->getNumberOfCellsOfSubLevelMesh();
    default:
      throw INTERP_KERNEL::Exception("MEDFileStructuredMesh::getNumberOfNodes : only meshDimRelToMax=0 and meshDimRelToMax=-1 supported !");
    }
}

bool MEDFileStructuredMesh::hasImplicitPart() const
{
  return true;
}

/*!
 * \sa MEDFileStructuredMesh::getImplicitFaceMesh
 */
mcIdType MEDFileStructuredMesh::buildImplicitPartIfAny(INTERP_KERNEL::NormalizedCellType gt) const
{
  static const char MSG[]="MEDFileStructuredMesh::buildImplicitPartIfAny : the given geo type is not manageable by a structured mesh !";
  const MEDCoupling1SGTUMesh *zeFaceMesh(_faces_if_necessary);
  if(!zeFaceMesh)
    {
      const INTERP_KERNEL::CellModel& cm(INTERP_KERNEL::CellModel::GetCellModel(MEDCouplingStructuredMesh::GetGeoTypeGivenMeshDimension(getMeshDimension())));
      if(cm.getReverseExtrudedType()!=gt)
        throw INTERP_KERNEL::Exception(MSG);
      buildImplicitPart();
      return getStructuredMesh()->getNumberOfCellsOfSubLevelMesh();
    }
  else
    {
      if(gt!=zeFaceMesh->getCellModelEnum())
        throw INTERP_KERNEL::Exception(MSG);
      return zeFaceMesh->getNumberOfCells();
    }
}

void MEDFileStructuredMesh::buildMinusOneImplicitPartIfNeeded() const
{
  const MEDCoupling1SGTUMesh *zeFaceMesh(_faces_if_necessary);
  if(!zeFaceMesh)
    buildImplicitPart();
}

void MEDFileStructuredMesh::buildImplicitPart() const
{
  const MEDCouplingStructuredMesh *mcmesh(getStructuredMesh());
  if(!mcmesh)
    throw INTERP_KERNEL::Exception("MEDFileStructuredMesh::buildImplicitPart : Unable to build the implicit part of structured mesh because no structured mesh at level 0 defined !");
  _faces_if_necessary=mcmesh->build1SGTSubLevelMesh();
}

void MEDFileStructuredMesh::releaseImplicitPartIfAny() const
{
  _faces_if_necessary=0;
}

/*!
 * Retrieves the internal pointer (no decrRef requested) of the implicit face mesh if any.
 * To force to build it you can invoke MEDFileStructuredMesh::buildImplicitPartIfAny method.
 * 
 * \sa MEDFileStructuredMesh::buildImplicitPartIfAny
 */
MEDCoupling1SGTUMesh *MEDFileStructuredMesh::getImplicitFaceMesh() const
{
  checkCartesian();
  return _faces_if_necessary;
}

std::vector<INTERP_KERNEL::NormalizedCellType> MEDFileStructuredMesh::getGeoTypesAtLevel(int meshDimRelToMax) const
{
  const MEDCouplingStructuredMesh *cmesh(getStructuredMesh());
  if(!cmesh)
    throw INTERP_KERNEL::Exception("MEDFileStructuredMesh::getGeoTypesAtLevel : No structured mesh set !");
  switch(meshDimRelToMax)
  {
    case 0:
      {
        std::vector<INTERP_KERNEL::NormalizedCellType> ret(1,cmesh->getTypeOfCell(0));
        return ret;
      }
    case -1:
      {
        int mdim(cmesh->getMeshDimension());
        if(mdim<1)
          throw INTERP_KERNEL::Exception("MEDFileStructuredMesh::getGeoTypesAtLevel : only one level available for structured meshes ! Input 0 is mandatory or 0D mesh !");
        std::vector<INTERP_KERNEL::NormalizedCellType> ret(1,MEDCouplingStructuredMesh::GetGeoTypeGivenMeshDimension(mdim-1));
        return ret;
      }
    default:
      throw INTERP_KERNEL::Exception("MEDFileStructuredMesh::getGeoTypesAtLevel : only 2 levels available at most : 0 and -1 !");
  }
}

mcIdType MEDFileStructuredMesh::getNumberOfCellsWithType(INTERP_KERNEL::NormalizedCellType ct) const
{
  if(ct!=MEDCouplingStructuredMesh::GetGeoTypeGivenMeshDimension(getMeshDimension()))
    return 0;
  else
    return getNumberOfCellsAtLevel(0);
}

void MEDFileStructuredMesh::whichAreNodesFetched(const MEDFileField1TSStructItem& st, const MEDFileFieldGlobsReal *globs, std::vector<bool>& nodesFetched) const
{
  if(st.getNumberOfItems()!=1)
    throw INTERP_KERNEL::Exception("MEDFileStructuredMesh::whichAreNodesFetched : The sturture of field is not lying on single geo type ! it is not managed yet for structured mesh !");
  if(st[0].getGeo()!=MEDCouplingStructuredMesh::GetGeoTypeGivenMeshDimension(getMeshDimension()))
    throw INTERP_KERNEL::Exception("MEDFileStructuredMesh::whichAreNodesFetched : The sturture of field is not lying on expected geo type !");
  if(getNumberOfNodes()!=(mcIdType)nodesFetched.size())
    throw INTERP_KERNEL::Exception("MEDFileStructuredMesh::whichAreNodesFetched : invalid size of array !");
  if(st[0].getPflName().empty())
    {
      std::fill(nodesFetched.begin(),nodesFetched.end(),true);
      return ;
    }
  const DataArrayIdType *arr(globs->getProfile(st[0].getPflName()));
  const MEDCouplingStructuredMesh *cmesh=getStructuredMesh();//cmesh not null because getNumberOfNodes called before
  mcIdType sz(ToIdType(nodesFetched.size()));
  for(const mcIdType *work=arr->begin();work!=arr->end();work++)
    {
      std::vector<mcIdType> conn;
      cmesh->getNodeIdsOfCell(*work,conn);
      for(std::vector<mcIdType>::const_iterator it=conn.begin();it!=conn.end();it++)
        if(*it>=0 && *it<sz)
          nodesFetched[*it]=true;
        else
          throw INTERP_KERNEL::Exception("MEDFileStructuredMesh::whichAreNodesFetched : internal error !");
    }
}

med_geometry_type MEDFileStructuredMesh::GetGeoTypeFromMeshDim(int meshDim)
{
  INTERP_KERNEL::NormalizedCellType ct(MEDCouplingStructuredMesh::GetGeoTypeGivenMeshDimension(meshDim));
  return typmai3[ct];
}

void MEDFileStructuredMesh::LoadStrMeshDAFromFile(med_idt fid, int meshDim, int dt, int it, const std::string& mName, MEDFileMeshReadSelector *mrs,
                                                  MCAuto<DataArrayIdType>& famCells, MCAuto<DataArrayIdType>& numCells, MCAuto<DataArrayAsciiChar>& namesCells)
{
  med_bool chgt=MED_FALSE,trsf=MED_FALSE;
  med_geometry_type geoTypeReq=MEDFileStructuredMesh::GetGeoTypeFromMeshDim(meshDim);
  mcIdType nbOfElt(0);
  nbOfElt=MEDmeshnEntity(fid,mName.c_str(),dt,it,MED_CELL,geoTypeReq,MED_FAMILY_NUMBER,MED_NODAL,&chgt,&trsf);
  if(nbOfElt>0)
    {
      if(!mrs || mrs->isCellFamilyFieldReading())
        {
          MCAuto<DataArrayMedInt> miFamCells=DataArrayMedInt::New();
          miFamCells->alloc(nbOfElt,1);
          MEDFILESAFECALLERRD0(MEDmeshEntityFamilyNumberRd,(fid,mName.c_str(),dt,it,MED_CELL,geoTypeReq,miFamCells->getPointer()));
          famCells = FromMedIntArray<mcIdType>( miFamCells );
        }
    }
  nbOfElt=MEDmeshnEntity(fid,mName.c_str(),dt,it,MED_CELL,geoTypeReq,MED_NUMBER,MED_NODAL,&chgt,&trsf);
  if(nbOfElt>0)
    {
      if(!mrs || mrs->isCellNumFieldReading())
        {
          MCAuto<DataArrayMedInt> miNumCells=DataArrayMedInt::New();
          miNumCells->alloc(nbOfElt,1);
          MEDFILESAFECALLERRD0(MEDmeshEntityNumberRd,(fid,mName.c_str(),dt,it,MED_CELL,geoTypeReq,miNumCells->getPointer()));
          numCells = FromMedIntArray<mcIdType>( miNumCells );
        }
    }
  nbOfElt=MEDmeshnEntity(fid,mName.c_str(),dt,it,MED_CELL,geoTypeReq,MED_NAME,MED_NODAL,&chgt,&trsf);
  if(nbOfElt>0)
    {
      if(!mrs || mrs->isCellNameFieldReading())
        {
          namesCells=DataArrayAsciiChar::New();
          namesCells->alloc(nbOfElt+1,MED_SNAME_SIZE);//not a bug to avoid the memory corruption due to last \0 at the end
          MEDFILESAFECALLERRD0(MEDmeshEntityNameRd,(fid,mName.c_str(),dt,it,MED_CELL,geoTypeReq,namesCells->getPointer()));
          namesCells->reAlloc(nbOfElt);//not a bug to avoid the memory corruption due to last \0 at the end
        }
    }
}

void MEDFileStructuredMesh::loadStrMeshFromFile(MEDFileStrMeshL2 *strm, med_idt fid, const std::string& mName, int dt, int it, MEDFileMeshReadSelector *mrs)
{
  setName(strm->getName());
  setDescription(strm->getDescription());
  setUnivName(strm->getUnivName());
  setIteration(strm->getIteration());
  setOrder(strm->getOrder());
  setTimeValue(strm->getTime());
  setTimeUnit(strm->getTimeUnit());
  MEDFileMeshL2::ReadFamiliesAndGrps(fid,mName,_families,_groups,mrs);
  med_bool chgt=MED_FALSE,trsf=MED_FALSE;
  mcIdType nbOfElt(MEDmeshnEntity(fid,mName.c_str(),dt,it,MED_NODE,MED_NONE,MED_FAMILY_NUMBER,MED_NODAL,&chgt,&trsf));
  if(nbOfElt>0)
    {
      if(!mrs || mrs->isNodeFamilyFieldReading())
        {
          mcIdType nbNodes(getNumberOfNodes());
          if(nbOfElt>nbNodes)
            throw INTERP_KERNEL::Exception("MEDFileStructuredMesh::loadStrMeshFromFile : invalid size of family node array regarding number of nodes in this ! File seems to be corrupted !");
          MCAuto<DataArrayMedInt> miFamNodes=DataArrayMedInt::New();
          miFamNodes->alloc(nbNodes,1);//yes nbNodes and not nbOfElt see next line.
          if(nbNodes>nbOfElt)//yes it appends some times... It explains surely the mdump implementation. Bug revealed by PARAVIS EDF #2475 on structured.med file where only 12 first nodes are !=0 so nbOfElt=12 and nbOfNodes=378...
            miFamNodes->fillWithZero();
          MEDFILESAFECALLERRD0(MEDmeshEntityFamilyNumberRd,(fid,mName.c_str(),dt,it,MED_NODE,MED_NONE,miFamNodes->getPointer()));
          _fam_nodes = FromMedIntArray<mcIdType>( miFamNodes );
        }
    }
  nbOfElt=MEDmeshnEntity(fid,mName.c_str(),dt,it,MED_NODE,MED_NONE,MED_NUMBER,MED_NODAL,&chgt,&trsf);
  if(nbOfElt>0)
    {
      if(!mrs || mrs->isNodeNumFieldReading())
        {
          MCAuto<DataArrayMedInt> miNumNodes=DataArrayMedInt::New();
          miNumNodes->alloc(nbOfElt,1);
          MEDFILESAFECALLERRD0(MEDmeshEntityNumberRd,(fid,mName.c_str(),dt,it,MED_NODE,MED_NONE,miNumNodes->getPointer()));
          _num_nodes = FromMedIntArray<mcIdType>( miNumNodes );
        }
    }
  nbOfElt=MEDmeshnEntity(fid,mName.c_str(),dt,it,MED_NODE,MED_NONE,MED_NAME,MED_NODAL,&chgt,&trsf);
  if(nbOfElt>0)
    {
      if(!mrs || mrs->isNodeNameFieldReading())
        {
          _names_nodes=DataArrayAsciiChar::New();
          _names_nodes->alloc(nbOfElt+1,MED_SNAME_SIZE);//not a bug to avoid the memory corruption due to last \0 at the end
          MEDFILESAFECALLERRD0(MEDmeshEntityNameRd,(fid,mName.c_str(),dt,it,MED_NODE,MED_NONE,_names_nodes->getPointer()));
          _names_nodes->reAlloc(nbOfElt);//not a bug to avoid the memory corruption due to last \0 at the end
        }
    }
  int meshDim(getStructuredMesh()->getMeshDimension());
  LoadStrMeshDAFromFile(fid,meshDim,dt,it,mName,mrs,_fam_cells,_num_cells,_names_cells);
  if(meshDim>=1)
    LoadStrMeshDAFromFile(fid,meshDim-1,dt,it,mName,mrs,_fam_faces,_num_faces,_names_faces);
}

void MEDFileStructuredMesh::writeStructuredLL(med_idt fid, const std::string& maa) const
{
  int meshDim(getStructuredMesh()->getMeshDimension());
  med_geometry_type geoTypeReq(GetGeoTypeFromMeshDim(meshDim)),geoTypeReq2(GetGeoTypeFromMeshDim(meshDim-1));
  //
  if((const DataArrayIdType *)_fam_cells)
    MEDFILESAFECALLERWR0(MEDmeshEntityFamilyNumberWr,(fid,maa.c_str(),_iteration,_order,MED_CELL,geoTypeReq,ToMedInt(_fam_cells->getNumberOfTuples()),ToMedIntArray(_fam_cells)->getConstPointer()));
  if((const DataArrayIdType *)_fam_faces)
    MEDFILESAFECALLERWR0(MEDmeshEntityFamilyNumberWr,(fid,maa.c_str(),_iteration,_order,MED_CELL,geoTypeReq2,ToMedInt(_fam_faces->getNumberOfTuples()),ToMedIntArray(_fam_faces)->getConstPointer()));
  if((const DataArrayIdType *)_fam_nodes)
    MEDFILESAFECALLERWR0(MEDmeshEntityFamilyNumberWr,(fid,maa.c_str(),_iteration,_order,MED_NODE,MED_NONE,ToMedInt(_fam_nodes->getNumberOfTuples()),ToMedIntArray(_fam_nodes)->getConstPointer()));
  if((const DataArrayIdType *)_num_cells)
    MEDFILESAFECALLERWR0(MEDmeshEntityNumberWr,(fid,maa.c_str(),_iteration,_order,MED_CELL,geoTypeReq,ToMedInt(_num_cells->getNumberOfTuples()),ToMedIntArray(_num_cells)->getConstPointer()));
  if((const DataArrayIdType *)_num_faces)
    MEDFILESAFECALLERWR0(MEDmeshEntityNumberWr,(fid,maa.c_str(),_iteration,_order,MED_CELL,geoTypeReq2,ToMedInt(_num_faces->getNumberOfTuples()),ToMedIntArray(_num_faces)->getConstPointer()));
  if((const DataArrayIdType *)_num_nodes)
    MEDFILESAFECALLERWR0(MEDmeshEntityNumberWr,(fid,maa.c_str(),_iteration,_order,MED_NODE,MED_NONE,ToMedInt(_num_nodes->getNumberOfTuples()),ToMedIntArray(_num_nodes)->getConstPointer()));
  if((const DataArrayAsciiChar *)_names_cells)
    {
      if(_names_cells->getNumberOfComponents()!=MED_SNAME_SIZE)
        {
          std::ostringstream oss; oss << "MEDFileStructuredMesh::writeStructuredLL : expected a name field on cells with number of components set to " << MED_SNAME_SIZE;
          oss << " ! The array has " << _names_cells->getNumberOfComponents() << " components !";
          throw INTERP_KERNEL::Exception(oss.str().c_str());
        }
      MEDFILESAFECALLERWR0(MEDmeshEntityNameWr,(fid,maa.c_str(),_iteration,_order,MED_CELL,geoTypeReq,ToMedInt(_names_cells->getNumberOfTuples()),_names_cells->getConstPointer()));
    }
  if((const DataArrayAsciiChar *)_names_faces)
    {
      if(_names_faces->getNumberOfComponents()!=MED_SNAME_SIZE)
        {
          std::ostringstream oss; oss << "MEDFileStructuredMesh::writeStructuredLL : expected a name field on faces with number of components set to " << MED_SNAME_SIZE;
          oss << " ! The array has " << _names_faces->getNumberOfComponents() << " components !";
          throw INTERP_KERNEL::Exception(oss.str().c_str());
        }
      MEDFILESAFECALLERWR0(MEDmeshEntityNameWr,(fid,maa.c_str(),_iteration,_order,MED_CELL,geoTypeReq2,ToMedInt(_names_faces->getNumberOfTuples()),_names_faces->getConstPointer()));
    }
  if((const DataArrayAsciiChar *)_names_nodes)
    {
      if(_names_nodes->getNumberOfComponents()!=MED_SNAME_SIZE)
        {
          std::ostringstream oss; oss << "MEDFileStructuredMesh::writeStructuredLL : expected a name field on nodes with number of components set to " << MED_SNAME_SIZE;
          oss << " ! The array has " << _names_cells->getNumberOfComponents() << " components !";
          throw INTERP_KERNEL::Exception(oss.str().c_str());
        }
      MEDFILESAFECALLERWR0(MEDmeshEntityNameWr,(fid,maa.c_str(),_iteration,_order,MED_NODE,MED_NONE,ToMedInt(_names_nodes->getNumberOfTuples()),_names_nodes->getConstPointer()));
    }
  //
  MEDFileUMeshL2::WriteFamiliesAndGrps(fid,maa.c_str(),_families,_groups,_too_long_str);
}

/*!
 * Returns an empty instance of MEDFileCMesh.
 *  \return MEDFileCMesh * - a new instance of MEDFileCMesh. The caller is to delete this
 *          mesh using decrRef() as it is no more needed. 
 */
MEDFileCMesh *MEDFileCMesh::New()
{
  return new MEDFileCMesh;
}

/*!
 * Returns a new MEDFileCMesh holding the mesh data that has been read from a given MED
 * file. The first mesh in the file is loaded.
 *  \param [in] fileName - the name of MED file to read.
 *  \return MEDFileCMesh * - a new instance of MEDFileCMesh. The caller is to delete this
 *          mesh using decrRef() as it is no more needed. 
 *  \throw If the file is not readable.
 *  \throw If there is no meshes in the file.
 *  \throw If the mesh in the file is not a Cartesian one.
 */
MEDFileCMesh *MEDFileCMesh::New(const std::string& fileName, MEDFileMeshReadSelector *mrs)
{
  MEDFileUtilities::AutoFid fid(OpenMEDFileForRead(fileName));
  return New(fid,mrs);
}

MEDFileCMesh *MEDFileCMesh::New(med_idt fid, MEDFileMeshReadSelector *mrs)
{
  return NewForTheFirstMeshInFile<MEDFileCMesh>(fid,mrs);
}

/*!
 * Returns a new MEDFileCMesh holding the mesh data that has been read from a given MED
 * file. The mesh to load is specified by its name and numbers of a time step and an
 * iteration.
 *  \param [in] fileName - the name of MED file to read.
 *  \param [in] mName - the name of the mesh to read.
 *  \param [in] dt - the number of a time step.
 *  \param [in] it - the number of an iteration.
 *  \return MEDFileCMesh * - a new instance of MEDFileCMesh. The caller is to delete this
 *          mesh using decrRef() as it is no more needed. 
 *  \throw If the file is not readable.
 *  \throw If there is no mesh with given attributes in the file.
 *  \throw If the mesh in the file is not a Cartesian one.
 */
MEDFileCMesh *MEDFileCMesh::New(const std::string& fileName, const std::string& mName, int dt, int it, MEDFileMeshReadSelector *mrs)
{
  MEDFileUtilities::AutoFid fid(OpenMEDFileForRead(fileName));
  return New(fid,mName,dt,it,mrs);
}

MEDFileCMesh *MEDFileCMesh::New(med_idt fid, const std::string& mName, int dt, int it, MEDFileMeshReadSelector *mrs)
{
  return new MEDFileCMesh(fid,mName,dt,it,mrs);
}

std::size_t MEDFileCMesh::getHeapMemorySizeWithoutChildren() const
{
  return MEDFileStructuredMesh::getHeapMemorySizeWithoutChildren();
}

std::vector<const BigMemoryObject *> MEDFileCMesh::getDirectChildrenWithNull() const
{
  std::vector<const BigMemoryObject *> ret(MEDFileStructuredMesh::getDirectChildrenWithNull());
  ret.push_back((const MEDCouplingCMesh *)_cmesh);
  return ret;
}

/*!
 * Returns the dimension on cells in \a this mesh.
 *  \return int - the mesh dimension.
 *  \throw If there are no cells in this mesh.
 */
int MEDFileCMesh::getMeshDimension() const
{
  if(!((const MEDCouplingCMesh*)_cmesh))
    throw INTERP_KERNEL::Exception("MEDFileCMesh::getMeshDimension : unable to get meshdimension because no mesh set !");
  return _cmesh->getMeshDimension();
}

/*!
 * Returns the dimension on nodes in \a this mesh.
 *  \return int - the space dimension.
 *  \throw If there are no cells in this mesh.
 */
int MEDFileCMesh::getSpaceDimension() const
{
  if(!((const MEDCouplingCMesh*)_cmesh))
    throw INTERP_KERNEL::Exception("MEDFileCMesh::getSpaceDimension : unable to get spacedimension because no mesh set !");
  return _cmesh->getSpaceDimension();
}

/*!
 * Returns a string describing \a this mesh.
 *  \return std::string - the mesh information string.
 */
std::string MEDFileCMesh::simpleRepr() const
{
  return MEDFileStructuredMesh::simpleRepr();
}

/*!
 * Returns a full textual description of \a this mesh.
 *  \return std::string - the string holding the mesh description.
 */
std::string MEDFileCMesh::advancedRepr() const
{
  return simpleRepr();
}

MEDFileCMesh *MEDFileCMesh::shallowCpy() const
{
  MCAuto<MEDFileCMesh> ret(new MEDFileCMesh(*this));
  return ret.retn();
}

MEDFileMesh *MEDFileCMesh::createNewEmpty() const
{
  return new MEDFileCMesh;
}

MEDFileCMesh *MEDFileCMesh::deepCopy() const
{
  MCAuto<MEDFileCMesh> ret(new MEDFileCMesh(*this));
  ret->deepCpyEquivalences(*this);
  if((const MEDCouplingCMesh*)_cmesh)
    ret->_cmesh=static_cast<MEDCouplingCMesh*>(_cmesh->deepCopy());
  ret->deepCpyAttributes();
  return ret.retn();
}

/*!
 * Checks if \a this and another mesh are equal.
 *  \param [in] other - the mesh to compare with.
 *  \param [in] eps - a precision used to compare real values.
 *  \param [in,out] what - the string returning description of unequal data.
 *  \return bool - \c true if the meshes are equal, \c false, else.
 */
bool MEDFileCMesh::isEqual(const MEDFileMesh *other, double eps, std::string& what) const
{
  if(!MEDFileStructuredMesh::isEqual(other,eps,what))
    return false;
  const MEDFileCMesh *otherC=dynamic_cast<const MEDFileCMesh *>(other);
  if(!otherC)
    {
      what="Mesh types differ ! This is cartesian and other is NOT !";
      return false;
    }
  clearNonDiscrAttributes();
  otherC->clearNonDiscrAttributes();
  const MEDCouplingCMesh *coo1=_cmesh;
  const MEDCouplingCMesh *coo2=otherC->_cmesh;
  if((coo1==0 && coo2!=0) || (coo1!=0 && coo2==0))
    {
      what="Mismatch of cartesian meshes ! One is defined and not other !";
      return false;
    }
  if(coo1)
    {
      bool ret=coo1->isEqual(coo2,eps);
      if(!ret)
        {
          what="cartesian meshes differ !";
          return false;
        }
    }
  return true;
}

/*!
 * Clears redundant attributes of incorporated data arrays.
 */
void MEDFileCMesh::clearNonDiscrAttributes() const
{
  MEDFileStructuredMesh::clearNonDiscrAttributes();
  MEDFileUMeshSplitL1::ClearNonDiscrAttributes(_cmesh);//to it is not a bug umeshsplit have already the method implemented
}

MEDFileCMesh::MEDFileCMesh()
{
}

MEDFileCMesh::MEDFileCMesh(med_idt fid, const std::string& mName, int dt, int it, MEDFileMeshReadSelector *mrs)
try
{
    loadLLWithAdditionalItems(fid,mName,dt,it,mrs);
}
catch(INTERP_KERNEL::Exception& e)
{
    throw e;
}

void MEDFileCMesh::loadLL(med_idt fid, const std::string& mName, int dt, int it, MEDFileMeshReadSelector *mrs)
{
  MEDCoupling::MEDCouplingMeshType meshType;
  int dummy0,dummy1;
  std::string dtunit;
  MEDCoupling::MEDCouplingAxisType axType;
  INTERP_KERNEL::AutoCppPtr<MeshOrStructMeshCls> mid(MEDFileMeshL2::GetMeshIdFromName(fid,mName,meshType,axType,dummy0,dummy1,dtunit));
  if(meshType!=CARTESIAN)
    {
      std::ostringstream oss; oss << "Trying to load as cartesian an existing mesh with name '" << mName << "' that is NOT cartesian !";
      throw INTERP_KERNEL::Exception(oss.str().c_str());
    }
  MEDFileCMeshL2 loaderl2;
  loaderl2.loadAll(fid,mid,mName,dt,it);
  setAxisType(axType);
  MEDCouplingCMesh *mesh=loaderl2.getMesh();
  mesh->incrRef();
  _cmesh=mesh;
  loadStrMeshFromFile(&loaderl2,fid,mName,dt,it,mrs);
}

/*!
 * Returns a const pointer to MEDCouplingCMesh held by \a this mesh.
 *  \return const MEDCouplingCMesh * - a pointer to the held MEDCouplingCMesh.
 */
const MEDCouplingCMesh *MEDFileCMesh::getMesh() const
{
  synchronizeTinyInfoOnLeaves();
  return _cmesh;
}

const MEDCouplingStructuredMesh *MEDFileCMesh::getStructuredMesh() const
{
  synchronizeTinyInfoOnLeaves();
  return _cmesh;
}

/*!
 * Sets the MEDCouplingCMesh holding the data of \a this mesh.
 *  \param [in] m - the new MEDCouplingCMesh to refer to.
 *  \throw If the name or the description of \a this mesh and \a m are not empty and are
 *         different. 
 */
void MEDFileCMesh::setMesh(MEDCouplingCMesh *m)
{
  dealWithTinyInfo(m);
  if(m)
    m->incrRef();
  _cmesh=m;
}

MEDFileMesh *MEDFileCMesh::cartesianize() const
{
  if(getAxisType()==AX_CART)
    {
      incrRef();
      return const_cast<MEDFileCMesh *>(this);
    }
  else
    {
      const MEDCouplingCMesh *cmesh(getMesh());
      if(!cmesh)
        throw INTERP_KERNEL::Exception("MEDFileCMesh::cartesianize : impossible to turn into cartesian because the mesh is null !");
      MCAuto<MEDCouplingCurveLinearMesh> clmesh(cmesh->buildCurveLinear());
      MCAuto<DataArrayDouble> coords(clmesh->getCoords()->cartesianize(getAxisType()));
      clmesh->setCoords(coords);
      MCAuto<MEDFileCurveLinearMesh> ret(MEDFileCurveLinearMesh::New());
      ret->MEDFileStructuredMesh::operator=(*this);
      ret->setMesh(clmesh);
      ret->setAxisType(AX_CART);
      return ret.retn();
    }
}

void MEDFileCMesh::writeMeshLL(med_idt fid) const
{
  INTERP_KERNEL::AutoPtr<char> maa=MEDLoaderBase::buildEmptyString(MED_NAME_SIZE);
  INTERP_KERNEL::AutoPtr<char> desc=MEDLoaderBase::buildEmptyString(MED_COMMENT_SIZE);
  INTERP_KERNEL::AutoPtr<char> dtunit=MEDLoaderBase::buildEmptyString(MED_LNAME_SIZE);
  MEDLoaderBase::safeStrCpy(_name.c_str(),MED_NAME_SIZE,maa,_too_long_str);
  MEDLoaderBase::safeStrCpy(_desc_name.c_str(),MED_COMMENT_SIZE,desc,_too_long_str);
  MEDLoaderBase::safeStrCpy(_dt_unit.c_str(),MED_LNAME_SIZE,dtunit,_too_long_str);
  int spaceDim(_cmesh->getSpaceDimension());
  INTERP_KERNEL::AutoPtr<char> comp=MEDLoaderBase::buildEmptyString(spaceDim*MED_SNAME_SIZE);
  INTERP_KERNEL::AutoPtr<char> unit=MEDLoaderBase::buildEmptyString(spaceDim*MED_SNAME_SIZE);
  for(int i=0;i<spaceDim;i++)
    {
      std::string info(_cmesh->getCoordsAt(i)->getInfoOnComponent(0));
      std::string c,u;
      MEDLoaderBase::splitIntoNameAndUnit(info,c,u);
      MEDLoaderBase::safeStrCpy2(c.c_str(),MED_SNAME_SIZE-1,comp+i*MED_SNAME_SIZE,_too_long_str);//MED_TAILLE_PNOM-1 to avoid to write '\0' on next compo
      MEDLoaderBase::safeStrCpy2(u.c_str(),MED_SNAME_SIZE-1,unit+i*MED_SNAME_SIZE,_too_long_str);//MED_TAILLE_PNOM-1 to avoid to write '\0' on next compo
    }
  MEDFILESAFECALLERWR0(MEDmeshCr,(fid,maa,spaceDim,spaceDim,MED_STRUCTURED_MESH,desc,dtunit,MED_SORT_DTIT,MEDFileMeshL2::TraduceAxisTypeRev(getAxisType()),comp,unit));
  if(_univ_wr_status)
    MEDFILESAFECALLERWR0(MEDmeshUniversalNameWr,(fid,maa));
  MEDFILESAFECALLERWR0(MEDmeshGridTypeWr,(fid,maa,MEDFileMeshL2::TraduceAxisTypeRevStruct(getAxisType())));
  for(int i=0;i<spaceDim;i++)
    {
      const DataArrayDouble *da=_cmesh->getCoordsAt(i);
      MEDFILESAFECALLERWR0(MEDmeshGridIndexCoordinateWr,(fid,maa,_iteration,_order,_time,i+1,ToMedInt(da->getNumberOfTuples()),da->getConstPointer()));
    }
  //
  std::string meshName(MEDLoaderBase::buildStringFromFortran(maa,MED_NAME_SIZE));
  MEDFileStructuredMesh::writeStructuredLL(fid,meshName);
}

void MEDFileCMesh::synchronizeTinyInfoOnLeaves() const
{
  const MEDCouplingCMesh *cmesh=_cmesh;
  if(!cmesh)
    return;
  (const_cast<MEDCouplingCMesh *>(cmesh))->setName(_name);
  (const_cast<MEDCouplingCMesh *>(cmesh))->setDescription(_desc_name);
  (const_cast<MEDCouplingCMesh *>(cmesh))->setTime(_time,_iteration,_order);
  (const_cast<MEDCouplingCMesh *>(cmesh))->setTimeUnit(_dt_unit);
}

MEDFileCurveLinearMesh *MEDFileCurveLinearMesh::New()
{
  return new MEDFileCurveLinearMesh;
}

MEDFileCurveLinearMesh *MEDFileCurveLinearMesh::New(med_idt fid, MEDFileMeshReadSelector *mrs)
{
  return NewForTheFirstMeshInFile<MEDFileCurveLinearMesh>(fid,mrs);
}

MEDFileCurveLinearMesh *MEDFileCurveLinearMesh::New(const std::string& fileName, MEDFileMeshReadSelector *mrs)
{
  MEDFileUtilities::AutoFid fid(OpenMEDFileForRead(fileName));
  return New(fid,mrs);
}

MEDFileCurveLinearMesh *MEDFileCurveLinearMesh::New(const std::string& fileName, const std::string& mName, int dt, int it, MEDFileMeshReadSelector *mrs)
{
  MEDFileUtilities::AutoFid fid(OpenMEDFileForRead(fileName));
  return New(fid,mName,dt,it,mrs);
}

MEDFileCurveLinearMesh *MEDFileCurveLinearMesh::New(med_idt fid, const std::string& mName, int dt, int it, MEDFileMeshReadSelector *mrs)
{
  return new MEDFileCurveLinearMesh(fid,mName,dt,it,mrs);
}

std::size_t MEDFileCurveLinearMesh::getHeapMemorySizeWithoutChildren() const
{
  return MEDFileStructuredMesh::getHeapMemorySizeWithoutChildren();
}

std::vector<const BigMemoryObject *> MEDFileCurveLinearMesh::getDirectChildrenWithNull() const
{
  std::vector<const BigMemoryObject *> ret(MEDFileStructuredMesh::getDirectChildrenWithNull());
  ret.push_back((const MEDCouplingCurveLinearMesh *)_clmesh);
  return ret;
}

MEDFileCurveLinearMesh *MEDFileCurveLinearMesh::shallowCpy() const
{
  MCAuto<MEDFileCurveLinearMesh> ret(new MEDFileCurveLinearMesh(*this));
  return ret.retn();
}

MEDFileMesh *MEDFileCurveLinearMesh::createNewEmpty() const
{
  return new MEDFileCurveLinearMesh;
}

MEDFileCurveLinearMesh *MEDFileCurveLinearMesh::deepCopy() const
{
  MCAuto<MEDFileCurveLinearMesh> ret(new MEDFileCurveLinearMesh(*this));
  ret->deepCpyEquivalences(*this);
  if((const MEDCouplingCurveLinearMesh*)_clmesh)
    ret->_clmesh=static_cast<MEDCouplingCurveLinearMesh*>(_clmesh->deepCopy());
  ret->deepCpyAttributes();
  return ret.retn();
}

int MEDFileCurveLinearMesh::getMeshDimension() const
{
  if(!((const MEDCouplingCurveLinearMesh*)_clmesh))
    throw INTERP_KERNEL::Exception("MEDFileCurveLinearMesh::getMeshDimension : unable to get mesh dimension because no mesh set !");
  return _clmesh->getMeshDimension();
}

int MEDFileCurveLinearMesh::getSpaceDimension() const
{
  if(!((const MEDCouplingCurveLinearMesh*)_clmesh))
    throw INTERP_KERNEL::Exception("MEDFileCurveLinearMesh::getMeshDimension : unable to get space dimension because no mesh set !");
  return _clmesh->getSpaceDimension();
}

std::string MEDFileCurveLinearMesh::simpleRepr() const
{
  return MEDFileStructuredMesh::simpleRepr();
}

std::string MEDFileCurveLinearMesh::advancedRepr() const
{
  return simpleRepr();
}

bool MEDFileCurveLinearMesh::isEqual(const MEDFileMesh *other, double eps, std::string& what) const
{
  if(!MEDFileStructuredMesh::isEqual(other,eps,what))
    return false;
  const MEDFileCurveLinearMesh *otherC=dynamic_cast<const MEDFileCurveLinearMesh *>(other);
  if(!otherC)
    {
      what="Mesh types differ ! This is curve linear and other is NOT !";
      return false;
    }
  clearNonDiscrAttributes();
  otherC->clearNonDiscrAttributes();
  const MEDCouplingCurveLinearMesh *coo1=_clmesh;
  const MEDCouplingCurveLinearMesh *coo2=otherC->_clmesh;
  if((coo1==0 && coo2!=0) || (coo1!=0 && coo2==0))
    {
      what="Mismatch of curve linear meshes ! One is defined and not other !";
      return false;
    }
  if(coo1)
    {
      bool ret=coo1->isEqual(coo2,eps);
      if(!ret)
        {
          what="curve linear meshes differ !";
          return false;
        }
    }
  return true;
}

void MEDFileCurveLinearMesh::clearNonDiscrAttributes() const
{
  MEDFileStructuredMesh::clearNonDiscrAttributes();
  MEDFileUMeshSplitL1::ClearNonDiscrAttributes(_clmesh);//to it is not a bug umeshsplit have already the method implemented
}

void MEDFileCurveLinearMesh::synchronizeTinyInfoOnLeaves() const
{
  const MEDCouplingCurveLinearMesh *clmesh=_clmesh;
  if(!clmesh)
    return;
  (const_cast<MEDCouplingCurveLinearMesh *>(clmesh))->setName(_name);
  (const_cast<MEDCouplingCurveLinearMesh *>(clmesh))->setDescription(_desc_name);
  (const_cast<MEDCouplingCurveLinearMesh *>(clmesh))->setTime(_time,_iteration,_order);
  (const_cast<MEDCouplingCurveLinearMesh *>(clmesh))->setTimeUnit(_dt_unit);
}

const MEDCouplingCurveLinearMesh *MEDFileCurveLinearMesh::getMesh() const
{
  synchronizeTinyInfoOnLeaves();
  return _clmesh;
}

void MEDFileCurveLinearMesh::setMesh(MEDCouplingCurveLinearMesh *m)
{
  dealWithTinyInfo(m);
  if(m)
    m->incrRef();
  _clmesh=m;
}

MEDFileMesh *MEDFileCurveLinearMesh::cartesianize() const
{
  if(getAxisType()==AX_CART)
    {
      incrRef();
      return const_cast<MEDFileCurveLinearMesh *>(this);
    }
  else
    {
      const MEDCouplingCurveLinearMesh *mesh(getMesh());
      if(!mesh)
        throw INTERP_KERNEL::Exception("MEDFileCurveLinearMesh::cartesianize : impossible to turn into cartesian because the mesh is null !");
      const DataArrayDouble *coords(mesh->getCoords());
      if(!coords)
        throw INTERP_KERNEL::Exception("MEDFileCurveLinearMesh::cartesianize : coordinate pointer in mesh is null !");
      MCAuto<MEDFileCurveLinearMesh> ret(new MEDFileCurveLinearMesh(*this));
      MCAuto<MEDCouplingCurveLinearMesh> mesh2(mesh->clone(false));
      MCAuto<DataArrayDouble> coordsCart(coords->cartesianize(getAxisType()));
      mesh2->setCoords(coordsCart);
      ret->setMesh(mesh2);
      ret->setAxisType(AX_CART);
      return ret.retn();
    }
}

const MEDCouplingStructuredMesh *MEDFileCurveLinearMesh::getStructuredMesh() const
{
  synchronizeTinyInfoOnLeaves();
  return _clmesh;
}

MEDFileCurveLinearMesh::MEDFileCurveLinearMesh()
{
}

MEDFileCurveLinearMesh::MEDFileCurveLinearMesh(med_idt fid, const std::string& mName, int dt, int it, MEDFileMeshReadSelector *mrs)
try
{
    loadLLWithAdditionalItems(fid,mName,dt,it,mrs);
}
catch(INTERP_KERNEL::Exception& e)
{
    throw e;
}

void MEDFileCurveLinearMesh::writeMeshLL(med_idt fid) const
{
  INTERP_KERNEL::AutoPtr<char> maa=MEDLoaderBase::buildEmptyString(MED_NAME_SIZE);
  INTERP_KERNEL::AutoPtr<char> desc=MEDLoaderBase::buildEmptyString(MED_COMMENT_SIZE);
  INTERP_KERNEL::AutoPtr<char> dtunit=MEDLoaderBase::buildEmptyString(MED_LNAME_SIZE);
  MEDLoaderBase::safeStrCpy(_name.c_str(),MED_NAME_SIZE,maa,_too_long_str);
  MEDLoaderBase::safeStrCpy(_desc_name.c_str(),MED_COMMENT_SIZE,desc,_too_long_str);
  MEDLoaderBase::safeStrCpy(_dt_unit.c_str(),MED_LNAME_SIZE,dtunit,_too_long_str);
  int spaceDim=_clmesh->getSpaceDimension();
  int meshDim=_clmesh->getMeshDimension();
  INTERP_KERNEL::AutoPtr<char> comp=MEDLoaderBase::buildEmptyString(spaceDim*MED_SNAME_SIZE);
  INTERP_KERNEL::AutoPtr<char> unit=MEDLoaderBase::buildEmptyString(spaceDim*MED_SNAME_SIZE);
  const DataArrayDouble *coords=_clmesh->getCoords();
  if(!coords)
    throw INTERP_KERNEL::Exception("MEDFileCurveLinearMesh::writeMeshLL : no coordinates set !");
  for(int i=0;i<spaceDim;i++)
    {
      std::string info(_clmesh->getCoords()->getInfoOnComponent(i));
      std::string c,u;
      MEDLoaderBase::splitIntoNameAndUnit(info,c,u);
      MEDLoaderBase::safeStrCpy2(c.c_str(),MED_SNAME_SIZE-1,comp+i*MED_SNAME_SIZE,_too_long_str);//MED_TAILLE_PNOM-1 to avoid to write '\0' on next compo
      MEDLoaderBase::safeStrCpy2(u.c_str(),MED_SNAME_SIZE-1,unit+i*MED_SNAME_SIZE,_too_long_str);//MED_TAILLE_PNOM-1 to avoid to write '\0' on next compo
    }
  MEDFILESAFECALLERWR0(MEDmeshCr,(fid,maa,spaceDim,meshDim,MED_STRUCTURED_MESH,desc,dtunit,MED_SORT_DTIT,MEDFileMeshL2::TraduceAxisTypeRev(getAxisType()),comp,unit));
  if(_univ_wr_status)
    MEDFILESAFECALLERWR0(MEDmeshUniversalNameWr,(fid,maa));
  MEDFILESAFECALLERWR0(MEDmeshGridTypeWr,(fid,maa,MED_CURVILINEAR_GRID));
  std::vector<mcIdType> nodeGridSt=_clmesh->getNodeGridStructure();
  MEDFILESAFECALLERWR0(MEDmeshGridStructWr,(fid,maa,_iteration,_order,_time,ToMedIntArray(nodeGridSt)->getConstPointer()));

  MEDFILESAFECALLERWR0(MEDmeshNodeCoordinateWr,(fid,maa,_iteration,_order,_time,MED_FULL_INTERLACE,ToMedInt(coords->getNumberOfTuples()),coords->begin()));
  //
  std::string meshName(MEDLoaderBase::buildStringFromFortran(maa,MED_NAME_SIZE));
  MEDFileStructuredMesh::writeStructuredLL(fid,meshName);
}

void MEDFileCurveLinearMesh::loadLL(med_idt fid, const std::string& mName, int dt, int it, MEDFileMeshReadSelector *mrs)
{
  MEDCoupling::MEDCouplingMeshType meshType;
  int dummy0,dummy1;
  std::string dtunit;
  MEDCoupling::MEDCouplingAxisType axType;
  INTERP_KERNEL::AutoCppPtr<MeshOrStructMeshCls> mid(MEDFileMeshL2::GetMeshIdFromName(fid,mName,meshType,axType,dummy0,dummy1,dtunit));
  setAxisType(axType);
  if(meshType!=CURVE_LINEAR)
    {
      std::ostringstream oss; oss << "Trying to load as curve linear an existing mesh with name '" << mName << "' that is NOT curve linear !";
      throw INTERP_KERNEL::Exception(oss.str().c_str());
    }
  MEDFileCLMeshL2 loaderl2;
  loaderl2.loadAll(fid,mid,mName,dt,it);
  MEDCouplingCurveLinearMesh *mesh=loaderl2.getMesh();
  mesh->incrRef();
  _clmesh=mesh;
  loadStrMeshFromFile(&loaderl2,fid,mName,dt,it,mrs);
}

MEDFileMeshMultiTS *MEDFileMeshMultiTS::New()
{
  return new MEDFileMeshMultiTS;
}

MEDFileMeshMultiTS *MEDFileMeshMultiTS::New(med_idt fid)
{
  return new MEDFileMeshMultiTS(fid);
}

MEDFileMeshMultiTS *MEDFileMeshMultiTS::New(const std::string& fileName)
{
  MEDFileUtilities::AutoFid fid(OpenMEDFileForRead(fileName));
  return New(fid);
}

MEDFileMeshMultiTS *MEDFileMeshMultiTS::New(med_idt fid, const std::string& mName)
{
  return new MEDFileMeshMultiTS(fid,mName);
}

MEDFileMeshMultiTS *MEDFileMeshMultiTS::New(const std::string& fileName, const std::string& mName)
{
  MEDFileUtilities::AutoFid fid(OpenMEDFileForRead(fileName));
  return New(fid,mName);
}

MEDFileMeshMultiTS *MEDFileMeshMultiTS::deepCopy() const
{
  MCAuto<MEDFileMeshMultiTS> ret(MEDFileMeshMultiTS::New());
  std::vector< MCAuto<MEDFileMesh> > meshOneTs(_mesh_one_ts.size());
  std::size_t i(0);
  for(std::vector< MCAuto<MEDFileMesh> >::const_iterator it=_mesh_one_ts.begin();it!=_mesh_one_ts.end();it++,i++)
    if((const MEDFileMesh *)*it)
      meshOneTs[i]=(*it)->deepCopy();
  ret->_mesh_one_ts=meshOneTs;
  return ret.retn();
}

std::size_t MEDFileMeshMultiTS::getHeapMemorySizeWithoutChildren() const
{
  return _mesh_one_ts.capacity()*sizeof(MCAuto<MEDFileMesh>);
}

std::vector<const BigMemoryObject *> MEDFileMeshMultiTS::getDirectChildrenWithNull() const
{
  std::vector<const BigMemoryObject *> ret;
  for(std::vector< MCAuto<MEDFileMesh> >::const_iterator it=_mesh_one_ts.begin();it!=_mesh_one_ts.end();it++)
    ret.push_back((const MEDFileMesh *)*it);
  return ret;
}

std::string MEDFileMeshMultiTS::getName() const
{
  if(_mesh_one_ts.empty())
    throw INTERP_KERNEL::Exception("MEDFileMeshMultiTS::getName : no time steps set !");
  return _mesh_one_ts[0]->getName();
}

void MEDFileMeshMultiTS::setName(const std::string& newMeshName)
{
  std::string oldName(getName());
  std::vector< std::pair<std::string,std::string> > v(1);
  v[0].first=oldName; v[0].second=newMeshName;
  changeNames(v);
}

bool MEDFileMeshMultiTS::changeNames(const std::vector< std::pair<std::string,std::string> >& modifTab)
{
  bool ret=false;
  for(std::vector< MCAuto<MEDFileMesh> >::iterator it=_mesh_one_ts.begin();it!=_mesh_one_ts.end();it++)
    {
      MEDFileMesh *cur(*it);
      if(cur)
        ret=cur->changeNames(modifTab) || ret;
    }
  return ret;
}

void MEDFileMeshMultiTS::cartesianizeMe()
{
  for(std::vector< MCAuto<MEDFileMesh> >::iterator it=_mesh_one_ts.begin();it!=_mesh_one_ts.end();it++)
    {
      MEDFileMesh *cur(*it);
      if(cur)
        {
          MCAuto<MEDFileMesh> ccur(cur->cartesianize());// Attention ! Do not wrap these two lines because memory leak !
          *it=ccur;
        }
    }
}

MEDFileMesh *MEDFileMeshMultiTS::getOneTimeStep() const
{
  if(_mesh_one_ts.empty())
    throw INTERP_KERNEL::Exception("MEDFileMeshMultiTS::getOneTimeStep : empty time step set !");
  return const_cast<MEDFileMesh *>(static_cast<const MEDFileMesh *>(_mesh_one_ts[0]));
}

void MEDFileMeshMultiTS::setOneTimeStep(MEDFileMesh *mesh1TimeStep)
{
  if(!mesh1TimeStep)
    throw INTERP_KERNEL::Exception("MEDFileMeshMultiTS::setOneTimeStep : input pointer should be different from 0 !");
  _mesh_one_ts.resize(1);
  mesh1TimeStep->incrRef();
  //MCAuto<MEDFileMesh> toto=mesh1TimeStep;
  _mesh_one_ts[0]=mesh1TimeStep;
}

MEDFileJoints * MEDFileMeshMultiTS::getJoints() const
{
  if ( MEDFileMesh* m = getOneTimeStep() )
    return m->getJoints();
  return 0;
}

/*!
 * \brief Set Joints that are common to all time-stamps
 */
void MEDFileMeshMultiTS::setJoints( MEDFileJoints* joints )
{
  for(std::vector< MCAuto<MEDFileMesh> >::iterator it=_mesh_one_ts.begin();it!=_mesh_one_ts.end();it++)
    {
      (*it)->setJoints( joints );
    }
}

bool MEDFileMeshMultiTS::presenceOfStructureElements() const
{
  for(std::vector< MCAuto<MEDFileMesh> >::const_iterator it=_mesh_one_ts.begin();it!=_mesh_one_ts.end();it++)
    if((*it).isNotNull())
      if((*it)->presenceOfStructureElements())
        return true;
  return false;
}

void MEDFileMeshMultiTS::killStructureElements()
{
  for(std::vector< MCAuto<MEDFileMesh> >::iterator it=_mesh_one_ts.begin();it!=_mesh_one_ts.end();it++)
    if((*it).isNotNull())
      (*it)->killStructureElements();
}

void MEDFileMeshMultiTS::writeLL(med_idt fid) const
{
  MEDFileJoints *joints(getJoints());
  bool jointsWritten(false);

  for(std::vector< MCAuto<MEDFileMesh> >::const_iterator it=_mesh_one_ts.begin();it!=_mesh_one_ts.end();it++)
    {
      if ( jointsWritten )
        const_cast<MEDFileMesh&>(**it).setJoints( 0 );
      else
        jointsWritten = true;

      (*it)->copyOptionsFrom(*this);
      (*it)->writeLL(fid);
    }

  (const_cast<MEDFileMeshMultiTS*>(this))->setJoints( joints ); // restore joints
}

void MEDFileMeshMultiTS::loadFromFile(med_idt fid, const std::string& mName)
{
  MEDFileJoints *joints(0);
  if ( !_mesh_one_ts.empty() && getOneTimeStep() )
    {
      // joints of mName already read, pass them to MEDFileMesh::New() to prevent repeated reading
      joints = getOneTimeStep()->getJoints();
    }
  _mesh_one_ts.clear();  //for the moment to be improved
  _mesh_one_ts.push_back( MEDFileMesh::New(fid,mName,-1,-1,0, joints ));
}

MEDFileMeshMultiTS::MEDFileMeshMultiTS()
{
}

MEDFileMeshMultiTS::MEDFileMeshMultiTS(med_idt fid)
try
{
  std::vector<std::string> ms(MEDLoaderNS::getMeshNamesFid(fid));
    if(ms.empty())
      {
        std::ostringstream oss; oss << "MEDFileMeshMultiTS : no meshes in file \"" << FileNameFromFID(fid) << "\" !";
        throw INTERP_KERNEL::Exception(oss.str().c_str());
      }
    int dt,it;
    MEDCoupling::MEDCouplingMeshType meshType;
    std::string dummy2;
    MEDCoupling::MEDCouplingAxisType dummy3;
    MEDFileMeshL2::GetMeshIdFromName(fid,ms.front(),meshType,dummy3,dt,it,dummy2);
    loadFromFile(fid,ms.front());
}
catch(INTERP_KERNEL::Exception& e)
{
    throw e;
}

MEDFileMeshMultiTS::MEDFileMeshMultiTS(med_idt fid, const std::string& mName)
try
{
    loadFromFile(fid,mName);
}
catch(INTERP_KERNEL::Exception& e)
{
    throw e;
}

MEDFileMeshes *MEDFileMeshes::New()
{
  return new MEDFileMeshes;
}

MEDFileMeshes *MEDFileMeshes::New(med_idt fid)
{
  return new MEDFileMeshes(fid);
}

MEDFileMeshes *MEDFileMeshes::New(const std::string& fileName)
{
  MEDFileUtilities::AutoFid fid(OpenMEDFileForRead(fileName));
  return New(fid);
}

void MEDFileMeshes::writeLL(med_idt fid) const
{
  checkConsistencyLight();
  for(std::vector< MCAuto<MEDFileMeshMultiTS> >::const_iterator it=_meshes.begin();it!=_meshes.end();it++)
    {
      (*it)->copyOptionsFrom(*this);
      (*it)->writeLL(fid);
    }
}

//  MEDFileMeshes::writ checkConsistencyLight();

int MEDFileMeshes::getNumberOfMeshes() const
{
  return (int)_meshes.size();
}

MEDFileMeshesIterator *MEDFileMeshes::iterator()
{
  return new MEDFileMeshesIterator(this);
}

/** Return a borrowed reference (caller is not responsible) */
MEDFileMesh *MEDFileMeshes::getMeshAtPos(int i) const
{
  if(i<0 || i>=(int)_meshes.size())
    {
      std::ostringstream oss; oss << "MEDFileMeshes::getMeshAtPos : invalid mesh id given in parameter ! Should be in [0;" << _meshes.size() << ") !";
      throw INTERP_KERNEL::Exception(oss.str().c_str());
    }
  return _meshes[i]->getOneTimeStep();
}

/** Return a borrowed reference (caller is not responsible) */
MEDFileMesh *MEDFileMeshes::getMeshWithName(const std::string& mname) const
{
  std::vector<std::string> ms=getMeshesNames();
  std::vector<std::string>::iterator it=std::find(ms.begin(),ms.end(),mname);
  if(it==ms.end())
    {
      std::ostringstream oss; oss << "MEDFileMeshes::getMeshWithName : Mesh  \"" << mname << "\" does not exist in this ! Existing are : ";
      std::copy(ms.begin(),ms.end(),std::ostream_iterator<std::string>(oss," "));
      throw INTERP_KERNEL::Exception(oss.str().c_str());
    }
  return getMeshAtPos((int)std::distance(ms.begin(),it));
}

std::vector<std::string> MEDFileMeshes::getMeshesNames() const
{
  std::vector<std::string> ret(_meshes.size());
  int i=0;
  for(std::vector< MCAuto<MEDFileMeshMultiTS> >::const_iterator it=_meshes.begin();it!=_meshes.end();it++,i++)
    {
      const MEDFileMeshMultiTS *f=(*it);
      if(f)
        {
          ret[i]=f->getName();
        }
      else
        {
          std::ostringstream oss; oss << "MEDFileMeshes::getMeshesNames : At rank #" << i << " mesh is not defined !";
          throw INTERP_KERNEL::Exception(oss.str().c_str());
        }
    }
  return ret;
}

bool MEDFileMeshes::changeNames(const std::vector< std::pair<std::string,std::string> >& modifTab)
{
  bool ret=false;
  for(std::vector< MCAuto<MEDFileMeshMultiTS> >::iterator it=_meshes.begin();it!=_meshes.end();it++)
    {
      MEDFileMeshMultiTS *cur(*it);
      if(cur)
        ret=cur->changeNames(modifTab) || ret;
    }
  return ret;
}

void MEDFileMeshes::cartesianizeMe()
{
  for(std::vector< MCAuto<MEDFileMeshMultiTS> >::iterator it=_meshes.begin();it!=_meshes.end();it++)
    {
      MEDFileMeshMultiTS *cur(*it);
      if(cur)
        cur->cartesianizeMe();
    }
}

void MEDFileMeshes::resize(int newSize)
{
  _meshes.resize(newSize);
}

void MEDFileMeshes::pushMesh(MEDFileMesh *mesh)
{
  if(!mesh)
    throw INTERP_KERNEL::Exception("MEDFileMeshes::pushMesh : invalid input pointer ! should be different from 0 !");
  MEDFileMeshMultiTS *elt=MEDFileMeshMultiTS::New();
  elt->setOneTimeStep(mesh);
  _meshes.push_back(elt);
}

void MEDFileMeshes::setMeshAtPos(int i, MEDFileMesh *mesh)
{
  if(!mesh)
    throw INTERP_KERNEL::Exception("MEDFileMeshes::setMeshAtPos : invalid input pointer ! should be different from 0 !");
  if(i>=(int)_meshes.size())
    _meshes.resize(i+1);
  MEDFileMeshMultiTS *elt=MEDFileMeshMultiTS::New();
  elt->setOneTimeStep(mesh);
  _meshes[i]=elt;
}

void MEDFileMeshes::destroyMeshAtPos(int i)
{
  if(i<0 || i>=(int)_meshes.size())
    {
      std::ostringstream oss; oss << "MEDFileMeshes::destroyMeshAtPos : Invalid given id in input (" << i << ") should be in [0," << _meshes.size() << ") !";
      throw INTERP_KERNEL::Exception(oss.str().c_str());
    }
  _meshes.erase(_meshes.begin()+i);
}

void MEDFileMeshes::loadFromFile(med_idt fid)
{
  std::vector<std::string> ms(MEDLoaderNS::getMeshNamesFid(fid));
  int i=0;
  _meshes.resize(ms.size());
  for(std::vector<std::string>::const_iterator it=ms.begin();it!=ms.end();it++,i++)
    _meshes[i]=MEDFileMeshMultiTS::New(fid,(*it));
}

MEDFileMeshes::MEDFileMeshes()
{
}

MEDFileMeshes::MEDFileMeshes(med_idt fid)
try
{
    loadFromFile(fid);
}
catch(INTERP_KERNEL::Exception& /*e*/)
{
}

MEDFileMeshes *MEDFileMeshes::deepCopy() const
{
  std::vector< MCAuto<MEDFileMeshMultiTS> > meshes(_meshes.size());
  std::size_t i=0;
  for(std::vector< MCAuto<MEDFileMeshMultiTS> >::const_iterator it=_meshes.begin();it!=_meshes.end();it++,i++)
    if((const MEDFileMeshMultiTS *)*it)
      meshes[i]=(*it)->deepCopy();
  MCAuto<MEDFileMeshes> ret(MEDFileMeshes::New());
  ret->_meshes=meshes;
  return ret.retn();
}

std::size_t MEDFileMeshes::getHeapMemorySizeWithoutChildren() const
{
  return _meshes.capacity()*(sizeof(MCAuto<MEDFileMeshMultiTS>));
}

std::vector<const BigMemoryObject *> MEDFileMeshes::getDirectChildrenWithNull() const
{
  std::vector<const BigMemoryObject *> ret;
  for(std::vector< MCAuto<MEDFileMeshMultiTS> >::const_iterator it=_meshes.begin();it!=_meshes.end();it++)
    ret.push_back((const MEDFileMeshMultiTS *)*it);
  return ret;
}

std::string MEDFileMeshes::simpleRepr() const
{
  std::ostringstream oss;
  oss << "(*****************)\n(* MEDFileMeshes *)\n(*****************)\n\n";
  simpleReprWithoutHeader(oss);
  return oss.str();
}

void MEDFileMeshes::simpleReprWithoutHeader(std::ostream& oss) const
{
  int nbOfMeshes=getNumberOfMeshes();
  oss << "There are " << nbOfMeshes << " meshes with the following names : \n";
  std::vector<std::string> mns=getMeshesNames();
  for(int i=0;i<nbOfMeshes;i++)
    oss << "  - #" << i << " \"" << mns[i] << "\"\n";
}

void MEDFileMeshes::checkConsistencyLight() const
{
  static const char MSG[]="MEDFileMeshes::checkConsistencyLight : mesh at rank ";
  int i=0;
  std::set<std::string> s;
  for(std::vector< MCAuto<MEDFileMeshMultiTS> >::const_iterator it=_meshes.begin();it!=_meshes.end();it++,i++)
    {
      const MEDFileMeshMultiTS *elt=(*it);
      if(!elt)
        {
          std::ostringstream oss; oss << MSG << i << "/" << _meshes.size() << " is empty !";
          throw INTERP_KERNEL::Exception(oss.str().c_str());
        }
      std::size_t sz=s.size();
      s.insert(std::string((*it)->getName()));
      if(s.size()==sz)
        {
          std::ostringstream oss; oss << MSG << i << " has a name (\"" << (*it)->getName() << "\") already used by an another mesh in list !";
          throw INTERP_KERNEL::Exception(oss.str().c_str());
        }
    }
}

bool MEDFileMeshes::presenceOfStructureElements() const
{
  for(std::vector< MCAuto<MEDFileMeshMultiTS> >::const_iterator it=_meshes.begin();it!=_meshes.end();it++)
    if((*it).isNotNull())
      if((*it)->presenceOfStructureElements())
        return true;
  return false;
}

void MEDFileMeshes::killStructureElements()
{
  for(std::vector< MCAuto<MEDFileMeshMultiTS> >::iterator it=_meshes.begin();it!=_meshes.end();it++)
    if((*it).isNotNull())
      (*it)->killStructureElements();
}

MEDFileMeshesIterator::MEDFileMeshesIterator(MEDFileMeshes *ms):_ms(ms),_iter_id(0),_nb_iter(0)
{
  if(ms)
    {
      ms->incrRef();
      _nb_iter=ms->getNumberOfMeshes();
    }
}

MEDFileMeshesIterator::~MEDFileMeshesIterator()
{
}

MEDFileMesh *MEDFileMeshesIterator::nextt()
{
  if(_iter_id<_nb_iter)
    {
      MEDFileMeshes *ms(_ms);
      if(ms)
        return ms->getMeshAtPos(_iter_id++);
      else
        return 0;
    }
  else
    return 0;
}

INTERP_KERNEL::NormalizedCellType MEDFileMesh::ConvertFromMEDFileGeoType(med_geometry_type geoType)
{
  med_geometry_type *pos(std::find(typmai,typmai+MED_N_CELL_FIXED_GEO,geoType));
  if(pos==typmai+MED_N_CELL_FIXED_GEO)
    {
      if(geoType==MED_NO_GEOTYPE)
        return INTERP_KERNEL::NORM_ERROR;
      std::ostringstream oss; oss << "MEDFileMesh::ConvertFromMEDFileGeoType : no entry with " << geoType << " !"; 
      throw INTERP_KERNEL::Exception(oss.str());
    }
  return typmai2[std::distance(typmai,pos)];
}

med_geometry_type MEDFileMesh::ConvertToMEDFileGeoType(INTERP_KERNEL::NormalizedCellType geoType)
{
  INTERP_KERNEL::NormalizedCellType *pos(std::find(typmai2,typmai2+MED_N_CELL_FIXED_GEO,geoType));
  if(pos==typmai2+MED_N_CELL_FIXED_GEO)
  {
    THROW_IK_EXCEPTION("MEDFileMesh::ConvertToMEDFileGeoType : no entry for " << geoType);
  }
  return typmai[std::distance(typmai2,pos)];
}

TypeOfField MEDFileMesh::ConvertFromMEDFileEntity(med_entity_type etype)
{
  switch(etype)
    {
    case MED_NODE:
      return ON_NODES;
    case MED_CELL:
      return ON_CELLS;
    case MED_NODE_ELEMENT:
      return ON_GAUSS_NE;
    default:
      {
        std::ostringstream oss; oss << "MEDFileMesh::ConvertFromMEDFileEntity : not recognized entity " << etype << " !";
        throw INTERP_KERNEL::Exception(oss.str());
      }
    }
}