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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.
-------------------------------------------------------------------------*/
// .NAME vtkChacoGraphReader - Reads chaco graph files.
//
// .SECTION Description
// 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 "vtkUndirectedGraphAlgorithm.h"

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

  // Description:
  // The Chaco file name.
  vtkGetStringMacro(FileName);
  vtkSetStringMacro(FileName);

protected:
  vtkChacoGraphReader();
  ~vtkChacoGraphReader();

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

private:
  char* FileName;

  vtkChacoGraphReader(const vtkChacoGraphReader&);  // Not implemented.
  void operator=(const vtkChacoGraphReader&);  // Not implemented.
};

#endif // _vtkChacoGraphReader_h