src/engine/WhileLoop.cxx

   1 // Copyright (C) 2006-2014  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, or (at your option) any later version.
   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
  20 #include "WhileLoop.hxx"
  21 #include "Runtime.hxx"
  22 #include "OutputPort.hxx"
  23 #include "Visitor.hxx"
  24 #include <iostream>
  25
  26 //#define _DEVDEBUG_
  27 #include "YacsTrace.hxx"
  28
  29 using namespace YACS::ENGINE;
  30 using namespace std;
  31
  32 const char WhileLoop::NAME_OF_INPUT_CONDITION[]="condition";
  33
  34 WhileLoop::WhileLoop(const std::string& name):Loop(name),_conditionPort(NAME_OF_INPUT_CONDITION,this)
  35 {
  36 }
  37
  38 WhileLoop::WhileLoop(const WhileLoop& other, ComposedNode *father, bool editionOnly):Loop(other,father,editionOnly),
  39                                                                                      _conditionPort(other._conditionPort,this)
  40 {
  41   //Copy Data linking
  42   std::vector< std::pair<OutPort *, InPort *> > linksToReproduce=other.getSetOfInternalLinks();
  43   std::vector< std::pair<OutPort *, InPort *> >::iterator iter=linksToReproduce.begin();
  44   for(;iter!=linksToReproduce.end();++iter)
  45     {
  46       OutPort* pout = iter->first;
  47       InPort* pin = iter->second;
  48       edAddLink(getOutPort(other.getPortName(pout)),getInPort(other.getPortName(pin)));
  49     }
  50 }
  51
  52 void WhileLoop::init(bool start)
  53 {
  54   Loop::init(start);
  55   _conditionPort.exInit(start);
  56 }
  57
  58 void WhileLoop::exUpdateState()
  59 {
  60   if(_state == YACS::DISABLED)
  61     return;
  62   if(_inGate.exIsReady())
  63     {
  64       setState(YACS::ACTIVATED);
  65       _node->exUpdateState();
  66       if(_conditionPort.isLinkedOutOfScope())
  67         if(_conditionPort.isEmpty())
  68           {
  69             delete _nodeForNullTurnOfLoops;
  70             _nodeForNullTurnOfLoops=new FakeNodeForLoop(this,false,true);
  71           }
  72         else
  73           if(!_conditionPort.getValue())
  74             {
  75               bool normalFinish=getAllOutPortsLeavingCurrentScope().empty();
  76               delete _nodeForNullTurnOfLoops;
  77               _nodeForNullTurnOfLoops=new FakeNodeForLoop(this,normalFinish);
  78             }
  79           else
  80             {
  81               delete _nodeForNullTurnOfLoops;
  82               _nodeForNullTurnOfLoops=0;
  83             }
  84     }
  85 }
  86
  87 Node *WhileLoop::simpleClone(ComposedNode *father, bool editionOnly) const
  88 {
  89   return new WhileLoop(*this,father,editionOnly);
  90 }
  91
  92 InputPort *WhileLoop::getInputPort(const std::string& name) const throw(YACS::Exception)
  93 {
  94   if(name==NAME_OF_INPUT_CONDITION)
  95     return (InputPort*)&_conditionPort;
  96   return Loop::getInputPort(name);
  97 }
  98
  99 //! Method used to notify the node that a child node has ended
 100 /*!
 101  * Update the loop state and return the loop change state
 102  *
 103  *  \param node : the child node that has ended
 104  *  \return the loop state change
 105  */
 106 YACS::Event WhileLoop::updateStateOnFinishedEventFrom(Node *node)
 107 {
 108   _nbOfTurns++;
 109   if(!_conditionPort.getValue())
 110     {
 111       setState(YACS::DONE);
 112       return YACS::FINISH;
 113     }
 114   else
 115     {
 116       node->init(false);
 117       node->exUpdateState();
 118     }
 119   return YACS::NOEVENT;
 120 }
 121
 122 void WhileLoop::checkLinkPossibility(OutPort *start,
 123                                      const std::list<ComposedNode *>& pointsOfViewStart,
 124                                      InPort *end,
 125                                      const std::list<ComposedNode *>& pointsOfViewEnd) throw(YACS::Exception)
 126 {
 127   DEBTRACE("WhileLoop::checkLinkPossibility");
 128 }
 129
 130 void WhileLoop::accept(Visitor *visitor)
 131 {
 132   visitor->visitWhileLoop(this);
 133 }
 134
 135 std::list<InputPort *> WhileLoop::getLocalInputPorts() const
 136 {
 137   list<InputPort *> ret;
 138   ret.push_back((InputPort *)&_conditionPort);
 139   return ret;
 140 }