src/Plugins/MEDReader/IO/vtkExtractGroup.cxx

   1 // Copyright (C) 2010-2014  CEA/DEN, EDF R&D
   2 //
   3 // This library is free software; you can redistribute it and/or
   4 // modify it under the terms of the GNU Lesser General Public
   5 // License as published by the Free Software Foundation; either
   6 // version 2.1 of the License.
   7 //
   8 // This library is distributed in the hope that it will be useful,
   9 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11 // Lesser General Public License for more details.
  12 //
  13 // You should have received a copy of the GNU Lesser General Public
  14 // License along with this library; if not, write to the Free Software
  15 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  16 //
  17 // See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
  18 //
  19 // Author : Anthony Geay
  20
  21 #include "vtkExtractGroup.h"
  22 #include "MEDFileFieldRepresentationTree.hxx"
  23
  24 #include "vtkAdjacentVertexIterator.h"
  25 #include "vtkIntArray.h"
  26 #include "vtkCellData.h"
  27 #include "vtkPointData.h"
  28
  29 #include "vtkStreamingDemandDrivenPipeline.h"
  30 #include "vtkUnstructuredGrid.h"
  31 #include  "vtkMultiBlockDataSet.h"
  32
  33 #include "vtkInformationStringKey.h"
  34 #include "vtkAlgorithmOutput.h"
  35 #include "vtkObjectFactory.h"
  36 #include "vtkMutableDirectedGraph.h"
  37 #include "vtkMultiBlockDataSet.h"
  38 #include "vtkDataSet.h"
  39 #include "vtkInformationVector.h"
  40 #include "vtkInformation.h"
  41 #include "vtkDataArraySelection.h"
  42 #include "vtkTimeStamp.h"
  43 #include "vtkInEdgeIterator.h"
  44 #include "vtkInformationDataObjectKey.h"
  45 #include "vtkExecutive.h"
  46 #include "vtkVariantArray.h"
  47 #include "vtkStringArray.h"
  48 #include "vtkDoubleArray.h"
  49 #include "vtkCharArray.h"
  50 #include "vtkUnsignedCharArray.h"
  51 #include "vtkDataSetAttributes.h"
  52 #include "vtkDemandDrivenPipeline.h"
  53 #include "vtkDataObjectTreeIterator.h"
  54 #include "vtkThreshold.h"
  55
  56 #include <map>
  57 #include <deque>
  58
  59 vtkStandardNewMacro(vtkExtractGroup);
  60
  61 vtkCxxSetObjectMacro(vtkExtractGroup, SIL, vtkMutableDirectedGraph);
  62
  63 ///////////////////
  64
  65 class ExtractGroupStatus
  66 {
  67 public:
  68   ExtractGroupStatus():_status(false) { }
  69   ExtractGroupStatus(const char *name);
  70   bool getStatus() const { return _status; }
  71   void setStatus(bool status) { _status=status; }
  72   void cpyStatusFrom(const ExtractGroupStatus& other) { _status=other._status; }
  73   std::string getName() const { return _name; }
  74   const char *getKeyOfEntry() const { return _ze_key_name.c_str(); }
  75   virtual void printMySelf(std::ostream& os) const;
  76   virtual bool isSameAs(const ExtractGroupStatus& other) const;
  77 protected:
  78 bool _status;
  79 std::string _name;
  80 std::string _ze_key_name;
  81 };
  82
  83 class ExtractGroupGrp : public ExtractGroupStatus
  84 {
  85 public:
  86   ExtractGroupGrp(const char *name):ExtractGroupStatus(name) { std::ostringstream oss; oss << START << name; _ze_key_name=oss.str(); }
  87   void setFamilies(const std::vector<std::string>& fams) { _fams=fams; }
  88   const std::vector<std::string>& getFamiliesLyingOn() const { return _fams; }
  89   bool isSameAs(const ExtractGroupGrp& other) const;
  90 public:
  91   static const char START[];
  92   std::vector<std::string> _fams;
  93 };
  94
  95 class ExtractGroupFam : public ExtractGroupStatus
  96 {
  97 public:
  98   ExtractGroupFam(const char *name);
  99   void printMySelf(std::ostream& os) const;
 100   void fillIdsToKeep(std::set<int>& s) const;
 101   int getId() const { return _id; }
 102   bool isSameAs(const ExtractGroupFam& other) const;
 103 public:
 104   static const char START[];
 105 private:
 106   int _id;
 107 };
 108
 109 class vtkExtractGroup::vtkExtractGroupInternal
 110 {
 111 public:
 112   void loadFrom(vtkMutableDirectedGraph *sil);
 113   int getNumberOfEntries() const;
 114   const char *getMeshName() const;
 115   const char *getKeyOfEntry(int i) const;
 116   bool getStatusOfEntryStr(const char *entry) const;
 117   void setStatusOfEntryStr(const char *entry, bool status);
 118   void printMySelf(std::ostream& os) const;
 119   std::set<int> getIdsToKeep() const;
 120   int getIdOfFamily(const std::string& famName) const;
 121   static bool IsInformationOK(vtkInformation *info);
 122 private:
 123   std::map<std::string,int> computeFamStrIdMap() const;
 124   const ExtractGroupStatus& getEntry(const char *entry) const;
 125   ExtractGroupStatus& getEntry(const char *entry);
 126 private:
 127   std::vector<ExtractGroupGrp> _groups;
 128   std::vector<ExtractGroupFam> _fams;
 129   std::string _mesh_name;
 130 };
 131
 132 const char ExtractGroupGrp::START[]="GRP_";
 133
 134 const char ExtractGroupFam::START[]="FAM_";
 135
 136 ExtractGroupStatus::ExtractGroupStatus(const char *name):_status(false),_name(name)
 137 {
 138 }
 139
 140 void ExtractGroupStatus::printMySelf(std::ostream& os) const
 141 {
 142   os << "      -" << _ze_key_name << "(";
 143   if(_status)
 144     os << "X";
 145   else
 146     os << " ";
 147   os << ")" << std::endl;
 148 }
 149
 150 bool ExtractGroupStatus::isSameAs(const ExtractGroupStatus& other) const
 151 {
 152   return _name==other._name && _ze_key_name==other._ze_key_name;
 153 }
 154
 155 bool ExtractGroupGrp::isSameAs(const ExtractGroupGrp& other) const
 156 {
 157   bool ret(ExtractGroupStatus::isSameAs(other));
 158   if(ret)
 159     return _fams==other._fams;
 160   else
 161     return false;
 162 }
 163
 164 bool vtkExtractGroup::vtkExtractGroupInternal::IsInformationOK(vtkInformation *info)
 165 {
 166   if(!info->Has(vtkDataObject::SIL()))
 167     return false;
 168   vtkMutableDirectedGraph *sil(vtkMutableDirectedGraph::SafeDownCast(info->Get(vtkDataObject::SIL())));
 169   if(!sil)
 170     return false;
 171   int idNames(0);
 172   vtkAbstractArray *verticesNames(sil->GetVertexData()->GetAbstractArray("Names",idNames));
 173   vtkStringArray *verticesNames2(vtkStringArray::SafeDownCast(verticesNames));
 174   if(!verticesNames2)
 175     return false;
 176   for(int i=0;i<verticesNames2->GetNumberOfValues();i++)
 177     {
 178       vtkStdString &st(verticesNames2->GetValue(i));
 179       if(st=="MeshesFamsGrps")
 180         return true;
 181     }
 182   return false;
 183 }
 184
 185 const char *vtkExtractGroup::vtkExtractGroupInternal::getMeshName() const
 186 {
 187   return this->_mesh_name.c_str();
 188 }
 189
 190 void vtkExtractGroup::vtkExtractGroupInternal::loadFrom(vtkMutableDirectedGraph *sil)
 191 {
 192   std::vector<ExtractGroupGrp> oldGrps(_groups); _groups.clear();
 193   std::vector<ExtractGroupFam> oldFams(_fams); _fams.clear();
 194   int idNames(0);
 195   vtkAbstractArray *verticesNames(sil->GetVertexData()->GetAbstractArray("Names",idNames));
 196   vtkStringArray *verticesNames2(vtkStringArray::SafeDownCast(verticesNames));
 197   vtkIdType id0;
 198   bool found(false);
 199   for(int i=0;i<verticesNames2->GetNumberOfValues();i++)
 200     {
 201       vtkStdString &st(verticesNames2->GetValue(i));
 202       if(st=="MeshesFamsGrps")
 203         {
 204           id0=i;
 205           found=true;
 206         }
 207     }
 208   if(!found)
 209     throw INTERP_KERNEL::Exception("There is an internal error ! The tree on server side has not the expected look !");
 210   vtkAdjacentVertexIterator *it0(vtkAdjacentVertexIterator::New());
 211   sil->GetAdjacentVertices(id0,it0);
 212   int kk(0),ll(0);
 213   while(it0->HasNext())
 214     {
 215       vtkIdType id1(it0->Next());
 216       std::string meshName((const char *)verticesNames2->GetValue(id1));
 217       this->_mesh_name=meshName;
 218       vtkAdjacentVertexIterator *it1(vtkAdjacentVertexIterator::New());
 219       sil->GetAdjacentVertices(id1,it1);
 220       vtkIdType idZeGrps(it1->Next());//zeGroups
 221       vtkAdjacentVertexIterator *itGrps(vtkAdjacentVertexIterator::New());
 222       sil->GetAdjacentVertices(idZeGrps,itGrps);
 223       while(itGrps->HasNext())
 224         {
 225           vtkIdType idg(itGrps->Next());
 226           ExtractGroupGrp grp((const char *)verticesNames2->GetValue(idg));
 227           vtkAdjacentVertexIterator *itGrps2(vtkAdjacentVertexIterator::New());
 228           sil->GetAdjacentVertices(idg,itGrps2);
 229           std::vector<std::string> famsOnGroup;
 230           while(itGrps2->HasNext())
 231             {
 232               vtkIdType idgf(itGrps2->Next());
 233               famsOnGroup.push_back(std::string((const char *)verticesNames2->GetValue(idgf)));
 234             }
 235           grp.setFamilies(famsOnGroup);
 236           itGrps2->Delete();
 237           _groups.push_back(grp);
 238         }
 239       itGrps->Delete();
 240       vtkIdType idZeFams(it1->Next());//zeFams
 241       it1->Delete();
 242       vtkAdjacentVertexIterator *itFams(vtkAdjacentVertexIterator::New());
 243       sil->GetAdjacentVertices(idZeFams,itFams);
 244       while(itFams->HasNext())
 245         {
 246           vtkIdType idf(itFams->Next());
 247           ExtractGroupFam fam((const char *)verticesNames2->GetValue(idf));
 248           _fams.push_back(fam);
 249         }
 250       itFams->Delete();
 251     }
 252   it0->Delete();
 253   //
 254   std::size_t szg(_groups.size()),szf(_fams.size());
 255   if(szg==oldGrps.size() && szf==oldFams.size())
 256     {
 257       bool isSame(true);
 258       for(std::size_t i=0;i<szg && isSame;i++)
 259         isSame=_groups[i].isSameAs(oldGrps[i]);
 260       for(std::size_t i=0;i<szf && isSame;i++)
 261         isSame=_fams[i].isSameAs(oldFams[i]);
 262       if(isSame)
 263         {
 264           for(std::size_t i=0;i<szg;i++)
 265             _groups[i].cpyStatusFrom(oldGrps[i]);
 266           for(std::size_t i=0;i<szf;i++)
 267             _fams[i].cpyStatusFrom(oldFams[i]);
 268         }
 269     }
 270 }
 271
 272 int vtkExtractGroup::vtkExtractGroupInternal::getNumberOfEntries() const
 273 {
 274   std::size_t sz0(_groups.size()),sz1(_fams.size());
 275   return (int)(sz0+sz1);
 276 }
 277
 278 const char *vtkExtractGroup::vtkExtractGroupInternal::getKeyOfEntry(int i) const
 279 {
 280   int sz0((int)_groups.size());
 281   if(i>=0 && i<sz0)
 282     return _groups[i].getKeyOfEntry();
 283   else
 284     return _fams[i-sz0].getKeyOfEntry();
 285 }
 286
 287 bool vtkExtractGroup::vtkExtractGroupInternal::getStatusOfEntryStr(const char *entry) const
 288 {
 289   const ExtractGroupStatus& elt(getEntry(entry));
 290   return elt.getStatus();
 291 }
 292
 293 void vtkExtractGroup::vtkExtractGroupInternal::setStatusOfEntryStr(const char *entry, bool status)
 294 {
 295   ExtractGroupStatus& elt(getEntry(entry));
 296   elt.setStatus(status);
 297 }
 298
 299 const ExtractGroupStatus& vtkExtractGroup::vtkExtractGroupInternal::getEntry(const char *entry) const
 300 {
 301   std::string entryCpp(entry);
 302   for(std::vector<ExtractGroupGrp>::const_iterator it0=_groups.begin();it0!=_groups.end();it0++)
 303     if(entryCpp==(*it0).getKeyOfEntry())
 304       return *it0;
 305   for(std::vector<ExtractGroupFam>::const_iterator it0=_fams.begin();it0!=_fams.end();it0++)
 306     if(entryCpp==(*it0).getKeyOfEntry())
 307       return *it0;
 308   std::ostringstream oss; oss << "vtkExtractGroupInternal::getEntry : no such entry \"" << entry << "\"!";
 309   throw INTERP_KERNEL::Exception(oss.str().c_str());
 310 }
 311
 312 ExtractGroupStatus& vtkExtractGroup::vtkExtractGroupInternal::getEntry(const char *entry)
 313 {
 314   std::string entryCpp(entry);
 315   for(std::vector<ExtractGroupGrp>::iterator it0=_groups.begin();it0!=_groups.end();it0++)
 316     if(entryCpp==(*it0).getKeyOfEntry())
 317       return *it0;
 318   for(std::vector<ExtractGroupFam>::iterator it0=_fams.begin();it0!=_fams.end();it0++)
 319     if(entryCpp==(*it0).getKeyOfEntry())
 320       return *it0;
 321   std::ostringstream oss; oss << "vtkExtractGroupInternal::getEntry : no such entry \"" << entry << "\"!";
 322   throw INTERP_KERNEL::Exception(oss.str().c_str());
 323 }
 324
 325 void vtkExtractGroup::vtkExtractGroupInternal::printMySelf(std::ostream& os) const
 326 {
 327   os << "Groups :" << std::endl;
 328   for(std::vector<ExtractGroupGrp>::const_iterator it0=_groups.begin();it0!=_groups.end();it0++)
 329     (*it0).printMySelf(os);
 330   os << "Families :" << std::endl;
 331   for(std::vector<ExtractGroupFam>::const_iterator it0=_fams.begin();it0!=_fams.end();it0++)
 332     (*it0).printMySelf(os);
 333 }
 334
 335 int vtkExtractGroup::vtkExtractGroupInternal::getIdOfFamily(const std::string& famName) const
 336 {
 337   for(std::vector<ExtractGroupFam>::const_iterator it=_fams.begin();it!=_fams.end();it++)
 338     {
 339       if((*it).getName()==famName)
 340         return (*it).getId();
 341     }
 342 }
 343
 344 ExtractGroupFam::ExtractGroupFam(const char *name):ExtractGroupStatus(name),_id(0)
 345 {
 346   std::size_t pos(_name.find(MEDFileFieldRepresentationLeavesArrays::ZE_SEP));
 347   std::string name0(_name.substr(0,pos)),name1(_name.substr(pos+strlen(MEDFileFieldRepresentationLeavesArrays::ZE_SEP)));
 348   std::istringstream iss(name1);
 349   iss >> _id;
 350   std::ostringstream oss; oss << START << name; _ze_key_name=oss.str(); _name=name0;
 351 }
 352
 353 bool ExtractGroupFam::isSameAs(const ExtractGroupFam& other) const
 354 {
 355   bool ret(ExtractGroupStatus::isSameAs(other));
 356   if(ret)
 357     return _id==other._id;
 358   else
 359     return false;
 360 }
 361
 362 void ExtractGroupFam::printMySelf(std::ostream& os) const
 363 {
 364   os << "      -" << _ze_key_name << " famName : \"" << _name << "\" id : " << _id << " (";
 365   if(_status)
 366     os << "X";
 367   else
 368     os << " ";
 369   os << ")" << std::endl;
 370 }
 371
 372 void ExtractGroupFam::fillIdsToKeep(std::set<int>& s) const
 373 {
 374   s.insert(_id);
 375 }
 376
 377 std::set<int> vtkExtractGroup::vtkExtractGroupInternal::getIdsToKeep() const
 378 {
 379   std::map<std::string,int> m(this->computeFamStrIdMap());
 380   std::set<int> s;
 381   for(std::vector<ExtractGroupGrp>::const_iterator it0=_groups.begin();it0!=_groups.end();it0++)
 382     {
 383       if((*it0).getStatus())
 384         {
 385           const std::vector<std::string>& fams((*it0).getFamiliesLyingOn());
 386           for(std::vector<std::string>::const_iterator it1=fams.begin();it1!=fams.end();it1++)
 387             {
 388               std::map<std::string,int>::iterator it2(m.find((*it1)));
 389               if(it2!=m.end())
 390                 s.insert((*it2).second);
 391             }
 392         }
 393      }
 394   for(std::vector<ExtractGroupFam>::const_iterator it0=_fams.begin();it0!=_fams.end();it0++)
 395     if((*it0).getStatus())
 396       (*it0).fillIdsToKeep(s);
 397   return s;
 398 }
 399
 400 std::map<std::string,int> vtkExtractGroup::vtkExtractGroupInternal::computeFamStrIdMap() const
 401 {
 402   std::map<std::string,int> ret;
 403   for(std::vector<ExtractGroupFam>::const_iterator it0=_fams.begin();it0!=_fams.end();it0++)
 404     ret[(*it0).getName()]=(*it0).getId();
 405   return ret;
 406 }
 407
 408 ////////////////////
 409
 410 vtkExtractGroup::vtkExtractGroup():SIL(NULL),Internal(new vtkExtractGroupInternal),InsideOut(0)
 411 {
 412 }
 413
 414 vtkExtractGroup::~vtkExtractGroup()
 415 {
 416   delete this->Internal;
 417 }
 418
 419 void vtkExtractGroup::SetInsideOut(int val)
 420 {
 421   if(this->InsideOut!=val)
 422     {
 423       this->InsideOut=val;
 424       this->Modified();
 425     }
 426 }
 427
 428 int vtkExtractGroup::RequestInformation(vtkInformation *request, vtkInformationVector **inputVector, vtkInformationVector *outputVector)
 429 {
 430   try
 431     {
 432       //std::cerr << "########################################## vtkExtractGroup::RequestInformation ##########################################" << std::endl;
 433       vtkInformation *outInfo(outputVector->GetInformationObject(0));
 434       vtkInformation *inputInfo(inputVector[0]->GetInformationObject(0));//unfortunately inputInfo->Has(vtkDataObject::SIL) returns false... use executive to find it !
 435       //
 436       vtkExecutive *exe(GetExecutive());
 437       vtkAlgorithm *alg(this);
 438       vtkInformation *infoOnSIL(alg->GetOutputInformation(0));
 439       while(!vtkExtractGroup::vtkExtractGroupInternal::IsInformationOK(infoOnSIL))// skipping vtkPVPostFilter
 440         {
 441           if(exe->GetNumberOfInputConnections(0)<1)
 442             {
 443               vtkErrorMacro("No SIL Data available ! The source of this filter must be MEDReader !");
 444               return 0;
 445             }
 446           vtkExecutive *exe2(exe->GetInputExecutive(0,0));
 447           //
 448           alg=exe2->GetAlgorithm(); exe=exe2; infoOnSIL=alg->GetOutputInformation(0);
 449         }
 450       //
 451       this->SetSIL(vtkMutableDirectedGraph::SafeDownCast(infoOnSIL->Get(vtkDataObject::SIL())));
 452       this->Internal->loadFrom(this->SIL);
 453       //this->Internal->printMySelf(std::cerr);
 454       outInfo->Set(vtkDataObject::SIL(),this->SIL);
 455     }
 456   catch(INTERP_KERNEL::Exception& e)
 457     {
 458       std::cerr << "Exception has been thrown in vtkExtractGroup::RequestInformation : " << e.what() << std::endl;
 459       return 0;
 460     }
 461   return 1;
 462 }
 463
 464 template<class CellPointExtractor>
 465 vtkDataSet *FilterFamilies(vtkDataSet *input, const std::set<int>& idsToKeep, bool insideOut, const char *arrNameOfFamilyField,
 466                            const char *associationForThreshold, bool& catchAll, bool& catchSmth)
 467 {
 468   static const int VTK_DATA_ARRAY_DELETE=vtkDataArrayTemplate<double>::VTK_DATA_ARRAY_DELETE;
 469   static const char ZE_SELECTION_ARR_NAME[]="@@ZeSelection@@";
 470   vtkDataSet *output(input->NewInstance());
 471   output->ShallowCopy(input);
 472   vtkSmartPointer<vtkThreshold> thres(vtkSmartPointer<vtkThreshold>::New());
 473   thres->SetInputData(output);
 474   vtkDataSetAttributes *dscIn(input->GetCellData()),*dscIn2(input->GetPointData());
 475   vtkDataSetAttributes *dscOut(output->GetCellData()),*dscOut2(output->GetPointData());
 476   //
 477   double vMin(insideOut==0?1.:0.),vMax(insideOut==0?2.:1.);
 478   thres->ThresholdBetween(vMin,vMax);
 479   // OK for the output
 480   //
 481   CellPointExtractor cpe2(input);
 482   vtkDataArray *da(cpe2.Get()->GetScalars(arrNameOfFamilyField));
 483   if(!da)
 484     return 0;
 485   std::string daName(da->GetName());
 486   vtkIntArray *dai(vtkIntArray::SafeDownCast(da));
 487   if(daName!=arrNameOfFamilyField || !dai)
 488     return 0;
 489   //
 490   int nbOfTuples(dai->GetNumberOfTuples());
 491   vtkCharArray *zeSelection(vtkCharArray::New());
 492   zeSelection->SetName(ZE_SELECTION_ARR_NAME);
 493   zeSelection->SetNumberOfComponents(1);
 494   char *pt(new char[nbOfTuples]);
 495   zeSelection->SetArray(pt,nbOfTuples,0,VTK_DATA_ARRAY_DELETE);
 496   const int *inPtr(dai->GetPointer(0));
 497   std::fill(pt,pt+nbOfTuples,0);
 498   catchAll=true; catchSmth=false;
 499   std::vector<bool> pt2(nbOfTuples,false);
 500   for(std::set<int>::const_iterator it=idsToKeep.begin();it!=idsToKeep.end();it++)
 501     {
 502       bool catchFid(false);
 503       for(int i=0;i<nbOfTuples;i++)
 504         if(inPtr[i]==*it)
 505           { pt2[i]=true; catchFid=true; }
 506       if(!catchFid)
 507         catchAll=false;
 508       else
 509         catchSmth=true;
 510     }
 511   for(int ii=0;ii<nbOfTuples;ii++)
 512     if(pt2[ii])
 513       pt[ii]=2;
 514   CellPointExtractor cpe3(output);
 515   int idx(cpe3.Get()->AddArray(zeSelection));
 516   cpe3.Get()->SetActiveAttribute(idx,vtkDataSetAttributes::SCALARS);
 517   cpe3.Get()->CopyScalarsOff();
 518   zeSelection->Delete();
 519   //
 520   thres->SetInputArrayToProcess(idx,0,0,associationForThreshold,ZE_SELECTION_ARR_NAME);
 521   thres->Update();
 522   vtkUnstructuredGrid *zeComputedOutput(thres->GetOutput());
 523   CellPointExtractor cpe(zeComputedOutput);
 524   cpe.Get()->RemoveArray(idx);
 525   output->Delete();
 526   zeComputedOutput->Register(0);
 527   return zeComputedOutput;
 528 }
 529
 530 class CellExtractor
 531 {
 532 public:
 533   CellExtractor(vtkDataSet *ds):_ds(ds) { }
 534   vtkDataSetAttributes *Get() { return _ds->GetCellData(); }
 535 private:
 536   vtkDataSet *_ds;
 537 };
 538
 539 class PointExtractor
 540 {
 541 public:
 542   PointExtractor(vtkDataSet *ds):_ds(ds) { }
 543   vtkDataSetAttributes *Get() { return _ds->GetPointData(); }
 544 private:
 545   vtkDataSet *_ds;
 546 };
 547
 548 int vtkExtractGroup::RequestData(vtkInformation *request, vtkInformationVector **inputVector, vtkInformationVector *outputVector)
 549 {
 550   try
 551     {
 552       //std::cerr << "########################################## vtkExtractGroup::RequestData        ##########################################" << std::endl;
 553       vtkInformation* inputInfo=inputVector[0]->GetInformationObject(0);
 554       vtkDataSet *input(vtkDataSet::SafeDownCast(inputInfo->Get(vtkDataObject::DATA_OBJECT())));
 555       vtkInformation *info(input->GetInformation());
 556       vtkInformation *outInfo(outputVector->GetInformationObject(0));
 557       vtkDataSet *output(vtkDataSet::SafeDownCast(outInfo->Get(vtkDataObject::DATA_OBJECT())));
 558       std::set<int> idsToKeep(this->Internal->getIdsToKeep());
 559       // first shrink the input
 560       bool catchAll,catchSmth;
 561       vtkDataSet *tryOnCell(FilterFamilies<CellExtractor>(input,idsToKeep,this->InsideOut,
 562                                                           MEDFileFieldRepresentationLeavesArrays::FAMILY_ID_CELL_NAME,"vtkDataObject::FIELD_ASSOCIATION_CELLS",catchAll,catchSmth));
 563       if(tryOnCell)
 564         {
 565           if(catchAll)
 566             {
 567               output->ShallowCopy(tryOnCell);
 568               tryOnCell->Delete();//
 569               return 1;
 570             }
 571           else
 572             {
 573               if(catchSmth)
 574                 {
 575                   vtkDataSet *tryOnNode(FilterFamilies<PointExtractor>(tryOnCell,idsToKeep,this->InsideOut,
 576                                                                        MEDFileFieldRepresentationLeavesArrays::FAMILY_ID_NODE_NAME,"vtkDataObject::FIELD_ASSOCIATION_POINTS",catchAll,catchSmth));
 577                   if(tryOnNode && catchSmth)
 578                     {
 579                       output->ShallowCopy(tryOnNode);
 580                       tryOnCell->Delete();
 581                       tryOnNode->Delete();//
 582                       return 1;
 583                     }
 584                   else
 585                     {
 586                       if(tryOnNode)
 587                         tryOnNode->Delete();
 588                       output->ShallowCopy(tryOnCell);
 589                       tryOnCell->Delete();
 590                       return 1;
 591                     }
 592                 }
 593               else
 594                 {
 595                   vtkDataSet *tryOnNode(FilterFamilies<PointExtractor>(input,idsToKeep,this->InsideOut,
 596                                                                        MEDFileFieldRepresentationLeavesArrays::FAMILY_ID_NODE_NAME,"vtkDataObject::FIELD_ASSOCIATION_POINTS",catchAll,catchSmth));
 597                   if(tryOnNode)
 598                     {
 599                       tryOnCell->Delete();
 600                       output->ShallowCopy(tryOnNode);
 601                       tryOnNode->Delete();
 602                       return 1;
 603                     }
 604                   else
 605                     {
 606                       output->ShallowCopy(tryOnCell);
 607                       tryOnCell->Delete();
 608                       return 0;
 609                     }
 610                 }
 611             }
 612         }
 613       else
 614         {
 615           vtkDataSet *tryOnNode(FilterFamilies<PointExtractor>(tryOnCell,idsToKeep,this->InsideOut,
 616                                                                MEDFileFieldRepresentationLeavesArrays::FAMILY_ID_NODE_NAME,"vtkDataObject::FIELD_ASSOCIATION_POINTS",catchAll,catchSmth));
 617           if(tryOnNode)
 618             {
 619               output->ShallowCopy(tryOnNode);
 620               tryOnNode->Delete();//
 621               return 1;
 622             }
 623           else
 624             {
 625               std::ostringstream oss; oss << "vtkExtractGroup::RequestData : The integer array with name \""<< MEDFileFieldRepresentationLeavesArrays::FAMILY_ID_CELL_NAME;
 626               oss << "\" or \"" << MEDFileFieldRepresentationLeavesArrays::FAMILY_ID_NODE_NAME << "\" does not exist ! The extraction of group and/or family is not possible !";
 627               if(this->HasObserver("ErrorEvent") )
 628                 this->InvokeEvent("ErrorEvent",const_cast<char *>(oss.str().c_str()));
 629               else
 630                 vtkOutputWindowDisplayErrorText(const_cast<char *>(oss.str().c_str()));
 631               vtkObject::BreakOnError();
 632               return 0;
 633             }
 634         }
 635     }
 636   catch(INTERP_KERNEL::Exception& e)
 637     {
 638       std::cerr << "Exception has been thrown in vtkExtractGroup::RequestData : " << e.what() << std::endl;
 639       return 0;
 640     }
 641 }
 642
 643 int vtkExtractGroup::GetSILUpdateStamp()
 644 {
 645   return this->SILTime;
 646 }
 647
 648 void vtkExtractGroup::PrintSelf(ostream& os, vtkIndent indent)
 649 {
 650   this->Superclass::PrintSelf(os, indent);
 651 }
 652
 653 int vtkExtractGroup::GetNumberOfGroupsFlagsArrays()
 654 {
 655   int ret(this->Internal->getNumberOfEntries());
 656   //std::cerr << "vtkExtractGroup::GetNumberOfFieldsTreeArrays() -> " << ret << std::endl;
 657   return ret;
 658 }
 659
 660 const char *vtkExtractGroup::GetGroupsFlagsArrayName(int index)
 661 {
 662   const char *ret(this->Internal->getKeyOfEntry(index));
 663   //std::cerr << "vtkExtractGroup::GetFieldsTreeArrayName(" << index << ") -> " << ret << std::endl;
 664   return ret;
 665 }
 666
 667 int vtkExtractGroup::GetGroupsFlagsArrayStatus(const char *name)
 668 {
 669   int ret((int)this->Internal->getStatusOfEntryStr(name));
 670   //std::cerr << "vtkExtractGroup::GetGroupsFlagsArrayStatus(" << name << ") -> " << ret << std::endl;
 671   return ret;
 672 }
 673
 674 void vtkExtractGroup::SetGroupsFlagsStatus(const char *name, int status)
 675 {
 676   //std::cerr << "vtkExtractGroup::SetFieldsStatus(" << name << "," << status << ")" << std::endl;
 677   this->Internal->setStatusOfEntryStr(name,(bool)status);
 678   if(std::string(name)==GetGroupsFlagsArrayName(GetNumberOfGroupsFlagsArrays()-1))
 679      this->Modified();
 680   //this->Internal->printMySelf(std::cerr);
 681 }
 682
 683 const char *vtkExtractGroup::GetMeshName()
 684 {
 685   return this->Internal->getMeshName();
 686 }