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

  Program:   Visualization Toolkit
  Module:    vtkXMLHyperOctreeWriter.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 vtkXMLHyperOctreeWriter - Write VTK XML HyperOctree files.
// .SECTION Description
// vtkXMLHyperOctreeWriter writes the VTK XML HyperOctree file
// format.  One HyperOctree input can be written into one file in
// any number of streamed pieces.  The standard extension for this
// writer's file format is "vto".  This writer is also used to write a
// single piece of the parallel file format.

// .SECTION See Also
// vtkXMLPHyperOctreeWriter

#ifndef __vtkXMLHyperOctreeWriter_h
#define __vtkXMLHyperOctreeWriter_h

#include "vtkXMLWriter.h"

class vtkHyperOctree;
class vtkHyperOctreeCursor;
class vtkIntArray;

class VTK_IO_EXPORT vtkXMLHyperOctreeWriter : public vtkXMLWriter
{
public:
  vtkTypeMacro(vtkXMLHyperOctreeWriter,vtkXMLWriter);
  void PrintSelf(ostream& os, vtkIndent indent);
  static vtkXMLHyperOctreeWriter* New();
  
  //BTX
  // Description:
  // Get/Set the writer's input.
  vtkHyperOctree* GetInput();
  //ETX

  // Description:
  // Get the default file extension for files written by this writer.
  const char* GetDefaultFileExtension();
  
protected:
  vtkXMLHyperOctreeWriter();
  ~vtkXMLHyperOctreeWriter();  

  const char* GetDataSetName();

  // specify that we require HyperOctree input
  virtual int FillInputPortInformation(int port, vtkInformation* info);

  //The most important method, make the XML file for my input.
  int WriteData();  

  //<HyperOctree ...
  int StartPrimElement(vtkIndent);

  //... dim, size, orgin>
  void WritePrimaryElementAttributes(ostream &, vtkIndent);

  //Tree Structure
  int WriteTopology(vtkIndent);

  //Used by WriteTopology to make and array from the Tree structure recursively
  void SerializeTopology(vtkHyperOctreeCursor *, int);

  //Writes PointData and CellData attribute data.
  int WriteAttributeData(vtkIndent);

  //</HyperOctree>
  int FinishPrimElement(vtkIndent);

  //For appended mode placekeeping
  vtkIntArray *TopologyArray;
  unsigned long TopoOffset;
  OffsetsManagerGroup * TopologyOM;
  OffsetsManagerGroup * PointDataOM;
  OffsetsManagerGroup * CellDataOM;
  
private:
  vtkXMLHyperOctreeWriter(const vtkXMLHyperOctreeWriter&);  // Not implemented.
  void operator=(const vtkXMLHyperOctreeWriter&);  // Not implemented.
};

#endif
