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

  Program:   Visualization Toolkit
  Module:    vtkTree.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 vtkTree_h
#define vtkTree_h

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

class vtkIdTypeArray;

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

  virtual int GetDataObjectType() {return VTK_TREE;}


  vtkGetMacro(Root, vtkIdType);


  vtkIdType GetNumberOfChildren(vtkIdType v)
    { return this->GetOutDegree(v); }

  vtkIdType GetChild(vtkIdType v, vtkIdType i);


  void GetChildren(vtkIdType v, vtkAdjacentVertexIterator *it)
    { this->GetAdjacentVertices(v, it); }

  vtkIdType GetParent(vtkIdType v);

//BTX

  vtkEdgeType GetParentEdge(vtkIdType v);
//ETX

  vtkIdType GetLevel(vtkIdType v);

  bool IsLeaf(vtkIdType vertex);

  //BTX

  static vtkTree *GetData(vtkInformation *info);
  static vtkTree *GetData(vtkInformationVector *v, int i=0);
  //ETX

  virtual void ReorderChildren(vtkIdType parent, vtkIdTypeArray *children);

protected:
  vtkTree();
  ~vtkTree();

  virtual bool IsStructureValid(vtkGraph *g);

  vtkIdType Root;

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

#endif