vtkXMLMultiBlockDataReader.h 2.83 KB
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/*=========================================================================

  Program:   ParaView
  Module:    vtkXMLMultiBlockDataReader.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.

=========================================================================*/
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/**
 * @class   vtkXMLMultiBlockDataReader
 * @brief   Reader for multi-block datasets
 *
 * vtkXMLMultiBlockDataReader reads the VTK XML multi-block data file
 * format. XML multi-block data files are meta-files that point to a list
 * of serial VTK XML files. When reading in parallel, it will distribute
 * sub-blocks among processor. If the number of sub-blocks is less than
 * the number of processors, some processors will not have any sub-blocks
 * for that block. If the number of sub-blocks is larger than the
 * number of processors, each processor will possibly have more than
 * 1 sub-block.
*/
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#ifndef vtkXMLMultiBlockDataReader_h
#define vtkXMLMultiBlockDataReader_h
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#include "vtkIOXMLModule.h" // For export macro
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#include "vtkXMLCompositeDataReader.h"
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class vtkMultiBlockDataSet;

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class VTKIOXML_EXPORT vtkXMLMultiBlockDataReader : public vtkXMLCompositeDataReader
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{
public:
  static vtkXMLMultiBlockDataReader* New();
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  vtkTypeMacro(vtkXMLMultiBlockDataReader,vtkXMLCompositeDataReader);
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  void PrintSelf(ostream& os, vtkIndent indent) override;
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protected:
  vtkXMLMultiBlockDataReader();
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  ~vtkXMLMultiBlockDataReader() override;
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  // Read the XML element for the subtree of a the composite dataset.
  // dataSetIndex is used to rank the leaf nodes in an inorder traversal.
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  void ReadComposite(vtkXMLDataElement* element,
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    vtkCompositeDataSet* composite, const char* filePath,
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    unsigned int &dataSetIndex) override;
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  // Reads file version < 1.0.
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  virtual void ReadVersion0(vtkXMLDataElement* element,
    vtkCompositeDataSet* composite, const char* filePath,
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    unsigned int &dataSetIndex);

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  // Get the name of the data set being read.
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  const char* GetDataSetName() override;
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  int FillOutputPortInformation(int, vtkInformation* info) override;
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  int RequestInformation(vtkInformation*,
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                                 vtkInformationVector**,
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                                 vtkInformationVector*) override;
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  virtual int FillMetaData(vtkCompositeDataSet* metadata,
                           vtkXMLDataElement* element,
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                           const std::string &filePath,
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                           unsigned int& dataSetIndex);

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private:
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  vtkXMLMultiBlockDataReader(const vtkXMLMultiBlockDataReader&) = delete;
  void operator=(const vtkXMLMultiBlockDataReader&) = delete;
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};

#endif