#include "ClonerStateVariables.h"
#include "X3DAbstractNode.h"

#include <map>
#include <algorithm>
#include <iostream>

using namespace std;

namespace X3DTK {

ClonerStateVariables::ClonerStateVariables()
: StateVariables(), _root(0)
{
}

ClonerStateVariables::~ClonerStateVariables()
{
}

void ClonerStateVariables::initRoot()
{
  _root = 0;
}

void ClonerStateVariables::init()
{
  _nodeStack.push_front(0);
}

void ClonerStateVariables::finish()
{
  _nodeStack.clear();
  _nodeCoupleMap.clear();
}

void ClonerStateVariables::addCoupleNode(SFNode N, SFNode NN)
{
  _nodeCoupleMap[N] = NN;  
}

void ClonerStateVariables::pushNode(SFNode N)
{
  SFNode T = getTop();
  if (T != 0)
    T->setChild(N);
    
  // filling the stack.    
  _nodeStack.push_front(N);

  // init root node.
  if (_root == 0)
    _root = N;
}

void ClonerStateVariables::popNode()
{
  _nodeStack.pop_front();
}

SFNode ClonerStateVariables::getNode(SFNode N) const
{
  map<SFNode, SFNode>::const_iterator it = _nodeCoupleMap.find(N);
  if (it != _nodeCoupleMap.end())
    return (*it).second;
    
  return 0;  
}

}