Method ReadXMLData

IO/XML/vtkXMLCompositeDataReader.cxx:335–383

------------------------------------------------------------------------------

//------------------------------------------------------------------------------
void vtkXMLCompositeDataReader::ReadXMLData()
{
  vtkLogF(TRACE, "vtkXMLCompositeDataReader::ReadXMLData");
  vtkInformation* info = this->GetCurrentOutputInformation();

  this->Internal->UpdatePiece = info->Get(vtkStreamingDemandDrivenPipeline::UPDATE_PIECE_NUMBER());
  this->Internal->UpdateNumberOfPieces =
    info->Get(vtkStreamingDemandDrivenPipeline::UPDATE_NUMBER_OF_PIECES());
  this->Internal->NumDataSets = this->CountNestedElements(this->GetPrimaryElement(), "DataSet");

  vtkDataObject* doOutput = info->Get(vtkDataObject::DATA_OBJECT());
  vtkCompositeDataSet* composite = vtkCompositeDataSet::SafeDownCast(doOutput);
  if (!composite)
  {
    return;
  }

  this->ReadFieldData();

  // Find the path to this file in case the internal files are
  // specified as relative paths.
  std::string filePath = this->GetFilePath();

  vtkInformation* outInfo = this->GetCurrentOutputInformation();
  if (outInfo->Has(vtkCompositeDataPipeline::UPDATE_COMPOSITE_INDICES()))
  {
    this->Internal->HasUpdateRestriction = true;
    this->Internal->UpdateIndices = std::set<int>();
    int length = outInfo->Length(vtkCompositeDataPipeline::UPDATE_COMPOSITE_INDICES());
    if (length > 0)
    {
      int* idx = outInfo->Get(vtkCompositeDataPipeline::UPDATE_COMPOSITE_INDICES());
      this->Internal->UpdateIndices = std::set<int>(idx, idx + length);

      // Change the total number of datasets so that we'll properly load
      // balance across the valid datasets.
      this->Internal->NumDataSets = length;
    }
  }
  else
  {
    this->Internal->HasUpdateRestriction = false;
  }

  // All processes create the entire tree structure however, but each one only
  // reads the datasets assigned to it.
  unsigned int dataSetIndex = 0;
  this->ReadComposite(this->GetPrimaryElement(), composite, filePath.c_str(), dataSetIndex);
}

//------------------------------------------------------------------------------
int vtkXMLCompositeDataReader::ShouldReadDataSet(