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

  Program:   Visualization Toolkit
  Module:    vtkMultiPieceDataSet.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.

=========================================================================*/
// .NAME vtkMultiPieceDataSet - composite dataset to encapsulates pieces of
// dataset.
// .SECTION Description
// A vtkMultiPieceDataSet dataset groups multiple data pieces together. 
// For example, say that a simulation broke a volume into 16 piece so that 
// each piece can be processed with 1 process in parallel. We want to load 
// this volume in a visualization cluster of 4 nodes. Each node will get 4 
// pieces, not necessarily forming a whole rectangular piece. In this case, 
// it is not possible to append the 4 pieces together into a vtkImageData. 
// In this case, these 4 pieces can be collected together using a 
// vtkMultiPieceDataSet. 
// Note that vtkMultiPieceDataSet is intended to be included in other composite
// datasets eg. vtkMultiBlockDataSet, vtkHierarchicalBoxDataSet. Hence the lack
// of algorithms producting vtkMultiPieceDataSet.

#ifndef __vtkMultiPieceDataSet_h
#define __vtkMultiPieceDataSet_h

#include "vtkCompositeDataSet.h"

class vtkDataSet;
class VTK_FILTERING_EXPORT vtkMultiPieceDataSet : public vtkCompositeDataSet
{
public:
  static vtkMultiPieceDataSet* New();
  vtkTypeMacro(vtkMultiPieceDataSet, vtkCompositeDataSet);
  void PrintSelf(ostream& os, vtkIndent indent);

  // Description:
  // Return class name of data type (see vtkType.h for
  // definitions).
  virtual int GetDataObjectType() {return VTK_MULTIPIECE_DATA_SET;}

  // Description:
  // Set the number of pieces. This will cause allocation if the new number of
  // pieces is greater than the current size. All new pieces are initialized to
  // null.
  void SetNumberOfPieces(unsigned int numpieces);

  // Description:
  // Returns the number of pieces.
  unsigned int GetNumberOfPieces();

  // Description:
  // Returns the piece at the given index. 
  vtkDataSet* GetPiece(unsigned int pieceno);
  vtkDataObject* GetPieceAsDataObject(unsigned int pieceno);

  // Description:
  // Sets the data object as the given piece. The total number of pieces will 
  // be resized to fit the requested piece no.
  void SetPiece(unsigned int pieceno, vtkDataObject* piece);

  // Description:
  // Returns true if meta-data is available for a given piece.
  int HasMetaData(unsigned int piece)
    { return this->Superclass::HasChildMetaData(piece); }

  // Description:
  // Returns the meta-data for the piece. If none is already present, a new
  // vtkInformation object will be allocated. Use HasMetaData to avoid
  // allocating vtkInformation objects.
  vtkInformation* GetMetaData(unsigned int pieceno)
    { return this->Superclass::GetChildMetaData(pieceno); }

  //BTX
  // Description:
  // Retrieve an instance of this class from an information object.
  static vtkMultiPieceDataSet* GetData(vtkInformation* info);
  static vtkMultiPieceDataSet* GetData(vtkInformationVector* v, int i=0);
  //ETX

  // Description:
  // Unhiding superclass method.
  virtual vtkInformation* GetMetaData(vtkCompositeDataIterator* iter)
    { return this->Superclass::GetMetaData(iter); }

  // Description:
  // Unhiding superclass method.
  virtual int HasMetaData(vtkCompositeDataIterator* iter)
    { return this->Superclass::HasMetaData(iter); }

//BTX
protected:
  vtkMultiPieceDataSet();
  ~vtkMultiPieceDataSet();

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

#endif