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/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkInEdgeIterator.h

  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.

     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.

=========================================================================*/
/*-------------------------------------------------------------------------
  Copyright 2008 Sandia Corporation.
  Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
  the U.S. Government retains certain rights in this software.
-------------------------------------------------------------------------*/
#ifndef vtkInEdgeIterator_h
#define vtkInEdgeIterator_h

#include "vtkCommonDataModelModule.h" // For export macro
#include "vtkObject.h"

#include "vtkGraph.h" // For edge type definitions

class vtkGraphEdge;

class VTKCOMMONDATAMODEL_EXPORT vtkInEdgeIterator : public vtkObject
{
public:
  static vtkInEdgeIterator *New();
  vtkTypeMacro(vtkInEdgeIterator, vtkObject);
  void PrintSelf(ostream& os, vtkIndent indent);

  void Initialize(vtkGraph *g, vtkIdType v);


  vtkGetObjectMacro(Graph, vtkGraph);
  vtkGetMacro(Vertex, vtkIdType);

  //BTX

  inline vtkInEdgeType Next()
  {
    vtkInEdgeType e = *this->Current;
    ++this->Current;
    return e;
  }
  //ETX

  vtkGraphEdge *NextGraphEdge();


  bool HasNext()
  {
    return this->Current != this->End;
  }

protected:
  vtkInEdgeIterator();
  ~vtkInEdgeIterator();

  virtual void SetGraph(vtkGraph *graph);

  vtkGraph           *Graph;
  const vtkInEdgeType *Current;
  const vtkInEdgeType *End;
  vtkIdType            Vertex;
  vtkGraphEdge       *GraphEdge;

private:
  vtkInEdgeIterator(const vtkInEdgeIterator&);  // Not implemented.
  void operator=(const vtkInEdgeIterator&);  // Not implemented.
};

#endif