Method CanParseFile

IO/GeoJSON/vtkGeoJSONReader.cxx:194–227

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//------------------------------------------------------------------------------
int vtkGeoJSONReader::GeoJSONReaderInternal::CanParseFile(const char* filename, Json::Value& root)
{
  if (!filename)
  {
    vtkGenericWarningMacro(<< "Input filename not specified");
    return VTK_ERROR;
  }

  vtksys::ifstream file;
  file.open(filename);

  if (!file.is_open())
  {
    vtkGenericWarningMacro(<< "Unable to Open File " << filename);
    return VTK_ERROR;
  }

  Json::CharReaderBuilder builder;
  builder["collectComments"] = false;

  std::string formattedErrors;

  // parse the entire geoJSON data into the Json::Value root
  bool parsedSuccess = parseFromStream(builder, file, &root, &formattedErrors);

  if (!parsedSuccess)
  {
    // Report failures and their locations in the document
    vtkGenericWarningMacro(<< "Failed to parse JSON" << endl << formattedErrors);
    return VTK_ERROR;
  }

  return VTK_OK;
}

//------------------------------------------------------------------------------
int vtkGeoJSONReader::GeoJSONReaderInternal::CanParseString(char* input, Json::Value& root)