Method RequestInformation

IO/XML/vtkXMLMultiBlockDataReader.cxx:345–383

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//------------------------------------------------------------------------------
int vtkXMLMultiBlockDataReader::RequestInformation(
  vtkInformation* request, vtkInformationVector** inputVector, vtkInformationVector* outputVector)
{
  this->Superclass::RequestInformation(request, inputVector, outputVector);

  if (this->GetFileMajorVersion() < 1)
  {
    return 1;
  }

  // HACK: for now, if this is a multiblock of multipieces alone,
  // we can use a piece-based strategy for distributing pieces.
  bool is_multiblock_of_multipieces = true;
  auto elem = this->GetPrimaryElement();
  for (unsigned int cc = 0, max = elem->GetNumberOfNestedElements();
       is_multiblock_of_multipieces && cc < max; ++cc)
  {
    auto childXML = elem->GetNestedElement(cc);
    if (childXML == nullptr || childXML->GetName() == nullptr)
    {
      continue;
    }

    is_multiblock_of_multipieces = (strcmp(childXML->GetName(), "Piece") == 0);
  }
  this->DistributePiecesInMultiPieces = is_multiblock_of_multipieces;

  const std::string filePath = this->GetFilePath();
  vtkInformation* info = outputVector->GetInformationObject(0);
  vtkSmartPointer<vtkMultiBlockDataSet> metadata = vtkSmartPointer<vtkMultiBlockDataSet>::New();
  unsigned int dataSetIndex = 0;
  if (!this->FillMetaData(metadata, this->GetPrimaryElement(), filePath, dataSetIndex))
  {
    return 0;
  }
  info->Set(vtkCompositeDataPipeline::COMPOSITE_DATA_META_DATA(), metadata);

  return 1;
}
VTK_ABI_NAMESPACE_END