Method ReadComposite

IO/XML/vtkXMLMultiBlockDataReader.cxx:85–195

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//------------------------------------------------------------------------------
void vtkXMLMultiBlockDataReader::ReadComposite(vtkXMLDataElement* element,
  vtkCompositeDataSet* composite, const char* filePath, unsigned int& dataSetIndex)
{
  vtkMultiBlockDataSet* mblock = vtkMultiBlockDataSet::SafeDownCast(composite);
  vtkMultiPieceDataSet* mpiece = vtkMultiPieceDataSet::SafeDownCast(composite);
  if (!mblock && !mpiece)
  {
    vtkErrorMacro("Unsupported composite dataset.");
    return;
  }

  if (this->GetFileMajorVersion() < 1)
  {
    // Read legacy file.
    this->ReadVersion0(element, composite, filePath, dataSetIndex);
    return;
  }

  // count how may piece in total are there when reading a multi-piece.
  // This helps with distribution of the pieces.
  const unsigned int numPieces = (mpiece && this->DistributePiecesInMultiPieces)
    ? vtkXMLCompositeDataReader::CountNestedElements(element, "DataSet")
    : 0;

  const unsigned int maxElems = element->GetNumberOfNestedElements();
  for (unsigned int cc = 0; cc < maxElems; ++cc)
  {
    vtkXMLDataElement* childXML = element->GetNestedElement(cc);
    if (!childXML || !childXML->GetName())
    {
      continue;
    }

    int index = 0;
    if (!childXML->GetScalarAttribute("index", index))
    // if index not in the structure file, then
    // set up to add at the end
    {
      if (mblock)
      {
        index = mblock->GetNumberOfBlocks();
      }
      else if (mpiece)
      {
        index = mpiece->GetNumberOfPieces();
      }
    }
    // child is a leaf node, read and insert.
    const char* tagName = childXML->GetName();
    if (strcmp(tagName, "DataSet") == 0)
    {
      vtkSmartPointer<vtkDataObject> childDS;
      const char* name = childXML->GetAttribute("name");
      if (this->ShouldReadDataSet(dataSetIndex, index, numPieces))
      {
        // Read
        childDS.TakeReference(this->ReadDataObject(childXML, filePath));
      }