def generate_output_items(self):
# type: () -> Iterator[NameValuePair]
for (output_name, converted_value_cell
) in self._output_name_to_converted_value_cell.items():
possible_input_names = self.iter_input_names_for_output_name(
output_name)
with DataConversionError.sublocation(possible_input_names):
yield output_name, converted_value_cell.output
def __call__(self, data):
# type: (Value) -> Iterator
with self.state_bookkeeper_context() as bookkeeper:
input_name_value_pairs = self.generate_input_name_value_pairs(data)
input_name_value_pairs = self.validate_input_names(
input_name_value_pairs)
input_name_value_pairs = bookkeeper.preprocess_input_items(
input_name_value_pairs)
for input_name, input_value in input_name_value_pairs:
with DataConversionError.sublocation(input_name):
item_conv = self._input_name_to_converter.get(
input_name, self._free_item_converter)
for output_name, converted_value_cell in item_conv(
(input_name, input_value)):
bookkeeper.collect_converted_item(
input_name, output_name, converted_value_cell)
bookkeeper.verify_required_input_items_collected(
self._required_input_names)
output_name_value_pairs = bookkeeper.generate_output_items()
for assembled_data in self._assembling_converter(
output_name_value_pairs):
yield assembled_data
def generate_output_elements(self, input_elements):
# type: (Iterator[Value]) -> Iterator[Value]
for index, value in enumerate(input_elements):
with DataConversionError.sublocation(index):
for converted_value in self._element_converter(value):
yield converted_value