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

  Program:   Visualization Toolkit
  Module:    vtkPDataSetWriter.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.

=========================================================================*/
/**
 * @class   vtkPDataSetWriter
 * @brief   Manages writing pieces of a data set.
 *
 * vtkPDataSetWriter will write a piece of a file, and will also create
 * a metadata file that lists all of the files in a data set.
*/

#ifndef vtkPDataSetWriter_h
#define vtkPDataSetWriter_h

#include "vtkIOParallelModule.h" // For export macro
#include "vtkDataSetWriter.h"

#include <map> // for keeping track of extents
#include <vector> // for keeping track of extents

class vtkImageData;
class vtkRectilinearGrid;
class vtkStructuredGrid;
class vtkMultiProcessController;

class VTKIOPARALLEL_EXPORT vtkPDataSetWriter : public vtkDataSetWriter
{
public:
  void PrintSelf(ostream& os, vtkIndent indent);
  vtkTypeMacro(vtkPDataSetWriter,vtkDataSetWriter);
  static vtkPDataSetWriter *New();

  /**
   * Write the pvtk file and cooresponding vtk files.
   */
  virtual int Write();

  //@{
  /**
   * This is how many pieces the whole data set will be divided into.
   */
  void SetNumberOfPieces(int num);
  vtkGetMacro(NumberOfPieces, int);
  //@}

  //@{
  /**
   * Extra ghost cells will be written out to each piece file
   * if this value is larger than 0.
   */
  vtkSetMacro(GhostLevel, int);
  vtkGetMacro(GhostLevel, int);
  //@}

  //@{
  /**
   * This is the range of pieces that that this writer is
   * responsible for writing.  All pieces must be written
   * by some process.  The process that writes piece 0 also
   * writes the pvtk file that lists all the piece file names.
   */
  vtkSetMacro(StartPiece, int);
  vtkGetMacro(StartPiece, int);
  vtkSetMacro(EndPiece, int);
  vtkGetMacro(EndPiece, int);
  //@}

  //@{
  /**
   * This file pattern uses the file name and piece number
   * to contruct a file name for the piece file.
   */
  vtkSetStringMacro(FilePattern);
  vtkGetStringMacro(FilePattern);
  //@}

  //@{
  /**
   * This flag determines whether to use absolute paths for the piece files.
   * By default the pieces are put in the main directory, and the piece file
   * names in the meta data pvtk file are relative to this directory.
   * This should make moving the whole lot to another directory, an easier task.
   */
  vtkSetMacro(UseRelativeFileNames, int);
  vtkGetMacro(UseRelativeFileNames, int);
  vtkBooleanMacro(UseRelativeFileNames, int);
  //@}

  //@{
  /**
   * Controller used to communicate data type of blocks.
   * By default, the global controller is used. If you want another
   * controller to be used, set it with this.
   */
  virtual void SetController(vtkMultiProcessController*);
  vtkGetObjectMacro(Controller, vtkMultiProcessController);
  //@}

protected:
  vtkPDataSetWriter();
  ~vtkPDataSetWriter();

  ostream *OpenFile();
  int WriteUnstructuredMetaData(vtkDataSet *input,
                                char *root, char *str, ostream *fptr);
  int WriteImageMetaData(vtkImageData *input,
                         char *root, char *str, ostream *fptr);
  int WriteRectilinearGridMetaData(vtkRectilinearGrid *input,
                                   char *root, char *str, ostream *fptr);
  int WriteStructuredGridMetaData(vtkStructuredGrid *input,
                                  char *root, char *str, ostream *fptr);

  int StartPiece;
  int EndPiece;
  int NumberOfPieces;
  int GhostLevel;

  int UseRelativeFileNames;

  char *FilePattern;

  void DeleteFiles();

  typedef std::map<int, std::vector<int> > ExtentsType;
  ExtentsType Extents;

  vtkMultiProcessController* Controller;

private:
  vtkPDataSetWriter(const vtkPDataSetWriter&) VTK_DELETE_FUNCTION;
  void operator=(const vtkPDataSetWriter&) VTK_DELETE_FUNCTION;
};

#endif