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

  Program:   Visualization Toolkit
  Module:    vtkChacoGraphReader.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.
-------------------------------------------------------------------------*/
/**
 * @class   vtkChacoGraphReader
 * @brief   Reads chaco graph files.
 *
 *
 * vtkChacoGraphReader reads in files in the Chaco format into a vtkGraph.
 * An example is the following
 * <code>
 * 10 13
 * 2 6 10
 * 1 3
 * 2 4 8
 * 3 5
 * 4 6 10
 * 1 5 7
 * 6 8
 * 3 7 9
 * 8 10
 * 1 5 9
 * </code>
 * The first line specifies the number of vertices and edges
 * in the graph. Each additional line contains the vertices adjacent
 * to a particular vertex.  In this example, vertex 1 is adjacent to
 * 2, 6 and 10, vertex 2 is adjacent to 1 and 3, etc.  Since Chaco ids
 * start at 1 and VTK ids start at 0, the vertex ids in the vtkGraph
 * will be 1 less than the Chaco ids.
*/

#ifndef vtkChacoGraphReader_h
#define vtkChacoGraphReader_h

#include "vtkIOInfovisModule.h" // For export macro
#include "vtkUndirectedGraphAlgorithm.h"

class VTKIOINFOVIS_EXPORT vtkChacoGraphReader : public vtkUndirectedGraphAlgorithm
{
public:
  static vtkChacoGraphReader *New();
  vtkTypeMacro(vtkChacoGraphReader, vtkUndirectedGraphAlgorithm);
  void PrintSelf(ostream& os, vtkIndent indent);

  //@{
  /**
   * The Chaco file name.
   */
  vtkGetStringMacro(FileName);
  vtkSetStringMacro(FileName);
  //@}

protected:
  vtkChacoGraphReader();
  ~vtkChacoGraphReader();

  virtual int RequestData(
    vtkInformation *,
    vtkInformationVector **,
    vtkInformationVector *);

private:
  char* FileName;

  vtkChacoGraphReader(const vtkChacoGraphReader&) VTK_DELETE_FUNCTION;
  void operator=(const vtkChacoGraphReader&) VTK_DELETE_FUNCTION;
};

#endif // vtkChacoGraphReader_h