Method ParseRoot

IO/GeoJSON/vtkGeoJSONReader.cxx:67–191

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//------------------------------------------------------------------------------
void vtkGeoJSONReader::GeoJSONReaderInternal::ParseRoot(const Json::Value& root,
  vtkPolyData* output, bool outlinePolygons, const char* serializedPropertiesArrayName)
{
  // Initialize geometry containers
  vtkNew<vtkPoints> points;
  points->SetDataTypeToDouble();
  output->SetPoints(points);
  vtkNew<vtkCellArray> verts;
  output->SetVerts(verts);
  vtkNew<vtkCellArray> lines;
  output->SetLines(lines);
  vtkNew<vtkCellArray> polys;
  output->SetPolys(polys);

  // Initialize feature-id array
  vtkStringArray* featureIdArray = vtkStringArray::New();
  featureIdArray->SetName("feature-id");
  output->GetCellData()->AddArray(featureIdArray);
  featureIdArray->Delete();

  // Initialize properties arrays
  if (serializedPropertiesArrayName)
  {
    vtkStringArray* propertiesArray = vtkStringArray::New();
    propertiesArray->SetName(serializedPropertiesArrayName);
    output->GetCellData()->AddArray(propertiesArray);
    propertiesArray->Delete();
  }

  vtkAbstractArray* array;
  std::vector<GeoJSONProperty>::iterator iter = this->PropertySpecs.begin();
  for (; iter != this->PropertySpecs.end(); ++iter)
  {
    array = nullptr;
    switch (iter->Value.GetType())
    {
      case VTK_BIT:
        array = vtkBitArray::New();
        break;

      case VTK_INT:
        array = vtkIntArray::New();
        break;

      case VTK_DOUBLE:
        array = vtkDoubleArray::New();
        break;

      case VTK_STRING:
        array = vtkStringArray::New();
        break;

      default:
        vtkGenericWarningMacro("unexpected data type " << iter->Value.GetType());
        break;
    }

    // Skip if array not created for some reason