Method ProcessRequest

IO/XML/vtkXMLUnstructuredDataWriter.cxx:84–254

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

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

  if (request->Has(vtkStreamingDemandDrivenPipeline::REQUEST_UPDATE_EXTENT()))
  {
    if ((this->WritePiece < 0) || (this->WritePiece >= this->NumberOfPieces))
    {
      this->SetInputUpdateExtent(this->CurrentPiece, this->NumberOfPieces, this->GhostLevel);
    }
    else
    {
      this->SetInputUpdateExtent(this->WritePiece, this->NumberOfPieces, this->GhostLevel);
    }
    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;
    }

    int numPieces = this->NumberOfPieces;

    if (this->WritePiece >= 0)
    {
      this->CurrentPiece = this->WritePiece;
    }
    else
    {
      float wholeProgressRange[2] = { 0, 1 };
      this->SetProgressRange(wholeProgressRange, this->CurrentPiece, this->NumberOfPieces);
    }

    int result = 1;
    if ((this->CurrentPiece == 0 && this->CurrentTimeIndex == 0) || this->WritePiece >= 0)
    {
      // We are just starting to write.  Do not call
      // UpdateProgressDiscrete because we want a 0 progress callback the
      // first time.
      this->UpdateProgress(0);

      // Initialize progress range to entire 0..1 range.
      if (this->WritePiece >= 0)
      {
        float wholeProgressRange[2] = { 0, 1 };
        this->SetProgressRange(wholeProgressRange, 0, 1);
      }

      if (!this->OpenStream())