class TransformVariableHandler(Handler):
# spec:
# key_value_delimiter: str
# known_key_predicate: str, State -> bool
# key_transformer: str, str, State -> str
# transform_fun: str -> object
# value: object
# rt: TransformVariableHandler
def __init__(self, key_value_delimiter, known_key_predicate, key_transformer, transform_fun, value):
self._key_value_handler = TransformKeyValueHandler(key_value_delimiter, known_key_predicate, key_transformer, transform_fun)
self._single_key_handler = SingleKeyHandler.create_with_known_key_predicate(key_value_delimiter, known_key_predicate, key_transformer, value)
# spec:
# key_value_delimiter: str
# known_key_list: [str]
# key_transformer: str, str, State -> str
# transform_fun: str -> object
# value: object
# rt: TransformVariableHandler
@classmethod
def create_with_known_key_list(cls, key_value_delimiter, known_key_list, key_transformer, transform_fun, value):
known_key_predicate = lambda key, state: key in known_key_list
return cls(key_value_delimiter, known_key_predicate, key_transformer, transform_fun, value)
# spec:
# key_value_delimiter: str
# known_key_predicate: str, State -> bool
# key_transformer: str, str, State -> str
# transform_fun: str -> object
# value: object
# rt: TransformVariableHandler
@classmethod
def create_with_known_key_predicate(cls, key_value_delimiter, known_key_predicate, key_transformer, transform_fun, value):
return cls(key_value_delimiter, known_key_predicate, key_transformer, transform_fun, value)
# spec: str, State -> (bool, State)
def process(self, source, state):
(result, state) = self._key_value_handler.process(source, state)
if result:
return (True, state)
return self._single_key_handler.process(source, state)
