Method ProcessRequest

IO/XML/vtkXMLStructuredDataWriter.cxx:104–244

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

//------------------------------------------------------------------------------
vtkTypeBool vtkXMLStructuredDataWriter::ProcessRequest(
  vtkInformation* request, vtkInformationVector** inputVector, vtkInformationVector* outputVector)
{

  if (request->Has(vtkStreamingDemandDrivenPipeline::REQUEST_INFORMATION()))
  {
    if (this->WritePiece >= 0)
    {
      this->CurrentPiece = this->WritePiece;
    }
    return 1;
  }

  if (request->Has(vtkStreamingDemandDrivenPipeline::REQUEST_UPDATE_EXTENT()))
  {
    this->SetInputUpdateExtent(this->CurrentPiece);

    return 1;
  }

  // generate the data
  else if (request->Has(vtkDemandDrivenPipeline::REQUEST_DATA()))
  {
    this->SetErrorCode(vtkErrorCode::NoError);

    if (!this->Stream && !this->FileName && !this->WriteToOutputString)
    {
      this->SetErrorCode(vtkErrorCode::NoFileNameError);
      vtkErrorMacro("The FileName or Stream must be set first or "
                    "the output must be written to a string.");
      return 0;
    }

    // We are just starting to write.  Do not call
    // UpdateProgressDiscrete because we want a 0 progress callback the
    // first time.
    this->UpdateProgress(0);
    this->SetProgressText("vtkXMLStructuredDataWriter");
    // Initialize progress range to entire 0..1 range.
    float wholeProgressRange[] = { 0.0f, 1.0f };
    vtkIdType fieldDataValues = 0;
    vtkFieldData* fieldData = this->GetInput()->GetFieldData();
    for (int i = 0; i < fieldData->GetNumberOfArrays(); ++i)
    {
      vtkAbstractArray* array = fieldData->GetAbstractArray(i);
      fieldDataValues += array->GetNumberOfValues();
    }
    vtkIdType dataSetValues = fieldDataValues + GetNumberOfValues(this->GetDataSetInput());
    if (dataSetValues == 0)
    {
      dataSetValues = 1;
    }
    float fraction[] = { 0.0f, static_cast<float>(fieldDataValues) / dataSetValues, 1.0f };
    this->SetProgressRange(wholeProgressRange, 0, fraction);
    int result = 1;
    if ((this->CurrentPiece == 0 || this->WritePiece >= 0) && this->CurrentTimeIndex == 0)
    {
      if (!this->OpenStream())