dox/IO/vtkXMLCompositeDataWriter.h

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

  Program:   ParaView
  Module:    vtkXMLCompositeDataWriter.h

  Copyright (c) Kitware, Inc.
  All rights reserved.
  See Copyright.txt or http://www.paraview.org/HTML/Copyright.html 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.

=========================================================================*/
#ifndef __vtkXMLCompositeDataWriter_h
#define __vtkXMLCompositeDataWriter_h

#include "vtkXMLWriter.h"
#include "vtkStdString.h" // needed for vtkStdString.

class vtkCallbackCommand;
class vtkCompositeDataSet;
class vtkXMLDataElement;
class vtkXMLCompositeDataWriterInternals;

class VTK_IO_EXPORT vtkXMLCompositeDataWriter : public vtkXMLWriter
{
public:
  vtkTypeMacro(vtkXMLCompositeDataWriter,vtkXMLWriter);
  void PrintSelf(ostream& os, vtkIndent indent);  
  
  virtual const char* GetDefaultFileExtension();
  
  vtkGetMacro(GhostLevel, int);
  vtkSetMacro(GhostLevel, int);
  

  vtkGetMacro(WriteMetaFile, int);
  virtual void SetWriteMetaFile(int flag);


  int ProcessRequest(vtkInformation*,
                     vtkInformationVector**,
                     vtkInformationVector*);

protected:
  vtkXMLCompositeDataWriter();
  ~vtkXMLCompositeDataWriter();


  virtual int GetDataSetMajorVersion() { return 1; }
  virtual int GetDataSetMinorVersion() { return 0; }

  vtkStdString CreatePieceFileName(int Piece);
  
  // see algorithm for more info
  virtual int FillInputPortInformation(int port, vtkInformation* info);

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

  virtual int WriteData();
  virtual const char* GetDataSetName();

  // Create a default executive.
  virtual vtkExecutive* CreateDefaultExecutive();

  vtkInformation* InputInformation;

  virtual void FillDataTypes(vtkCompositeDataSet*);

  unsigned int GetNumberOfDataTypes();

  int* GetDataTypesPointer();

  // Methods to create the set of writers matching the set of inputs.
  void CreateWriters(vtkCompositeDataSet*);
  vtkXMLWriter* GetWriter(int index);
  
  // Methods to help construct internal file names.
  void SplitFileName();
  const char* GetFilePrefix();
  const char* GetFilePath();

  int WriteMetaFileIfRequested();
  
  // Make a directory.
  void MakeDirectory(const char* name);
  
  // Remove a directory.
  void RemoveADirectory(const char* name);
  
  // Internal implementation details.
  vtkXMLCompositeDataWriterInternals* Internal;  
  
  // The number of ghost levels to write for unstructured data.
  int GhostLevel;
  
  int WriteMetaFile;
  
  // Callback registered with the ProgressObserver.
  static void ProgressCallbackFunction(vtkObject*, unsigned long, void*,
                                       void*);
  // Progress callback from internal writer.
  virtual void ProgressCallback(vtkAlgorithm* w);
  
  // The observer to report progress from the internal writer.
  vtkCallbackCommand* ProgressObserver;  
  
  // Garbage collection support.
  virtual void ReportReferences(vtkGarbageCollector*);


  virtual int WriteComposite(vtkCompositeDataSet* compositeData, 
    vtkXMLDataElement* element, int &writerIdx)=0;


  virtual int WriteNonCompositeData(
    vtkDataObject* dObj, vtkXMLDataElement* element, 
    int& writerIdx, const char* FileName);

  virtual void RemoveWrittenFiles(const char* SubDirectory);

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

#endif