Method RequestData

IO/GeoJSON/vtkGeoJSONReader.cxx:412–456

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

//------------------------------------------------------------------------------
int vtkGeoJSONReader::RequestData(vtkInformation* vtkNotUsed(request),
  vtkInformationVector** vtkNotUsed(request), vtkInformationVector* outputVector)
{
  // Get the info object
  vtkInformation* outInfo = outputVector->GetInformationObject(0);

  // Get the output
  vtkPolyData* output = vtkPolyData::SafeDownCast(outInfo->Get(vtkDataObject::DATA_OBJECT()));

  // Parse either string input of file, depending on mode
  Json::Value root;
  int parseResult = 0;
  if (this->StringInputMode)
  {
    parseResult = this->Internal->CanParseString(this->StringInput, root);
  }
  else
  {
    parseResult = this->Internal->CanParseFile(this->FileName, root);
  }

  if (parseResult != VTK_OK)
  {
    return VTK_ERROR;
  }

  // If parsed successfully into Json, then convert it
  // into appropriate vtkPolyData
  if (root.isObject())
  {
    this->Internal->ParseRoot(
      root, output, this->OutlinePolygons, this->SerializedPropertiesArrayName);

    // Convert Concave Polygons to convex polygons using triangulation
    if (output->GetNumberOfPolys() && this->TriangulatePolygons)
    {
      vtkNew<vtkTriangleFilter> filter;
      filter->SetInputData(output);
      filter->Update();

      output->ShallowCopy(filter->GetOutput());
    }
  }
  return VTK_OK;
}

//------------------------------------------------------------------------------
void vtkGeoJSONReader::PrintSelf(ostream& os, vtkIndent indent)