X:/dropbox/visualizationlibrary/src/vlCore/VLXVisitor.hpp

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/*  Visualization Library                                                             */
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#ifndef VLXVisitor_INCLUDE_ONCE
#define VLXVisitor_INCLUDE_ONCE

#include <vlCore/Object.hpp>
#include <set>

namespace vl
{
  class VLXStructure;
  class VLXList;
  class VLXRawtextBlock;
  class VLXArray;
  class VLXArrayInteger;
  class VLXArrayReal;
  /*
  class VLXArrayString;
  class VLXArrayIdentifier;
  class VLXArrayID;
  */
  //-----------------------------------------------------------------------------
  class VLXVisitor: public Object
  {
    VL_INSTRUMENT_CLASS(vl::VLXVisitor, Object)

  public:
    virtual void visitStructure(VLXStructure*) {}
    virtual void visitList(VLXList*) {}
    virtual void visitRawtextBlock(VLXRawtextBlock*) {}
    virtual void visitArray(VLXArrayInteger*) {}
    virtual void visitArray(VLXArrayReal*) {}
    /*
    virtual void visitArray(VLXArrayString*) {}
    virtual void visitArray(VLXArrayIdentifier*) {}
    virtual void visitArray(VLXArrayID*) {}
    */

    bool isVisited(void* node)
    {
      std::set< void* >::iterator it = mVisited.find(node);
      if (it == mVisited.end())
      {
        mVisited.insert(node);
        return false;
      }
      else 
        return true;
    }
    
    void resetVisitedNodes() { mVisited.clear(); };

  private:
    std::set< void* > mVisited;
  };
}

#endif