def cast_param_type_from_string(cls, param_value, param_type):
'''
Parameters are saved in a text format, so we have to cast them to the
appropriate type on loading. This function does exactly that.
@param param_value: the actual value of the parameter, in a string
format
@param param_type: the wanted type
@returns something: the casted param_value
'''
if param_type in cls._type_converter:
return cls._type_converter[param_type](param_value)
elif param_type == cls.TYPE_BOOL:
if param_value == "True":
return True
elif param_value == "False":
return False
else:
raise Exception("Unrecognized bool value '%s'" % param_type)
elif param_type == cls.TYPE_PASSWORD:
if param_value == -1:
return None
return Keyring().get_password(int(param_value))
elif param_type == cls.TYPE_LIST_OF_STRINGS:
the_list = param_value.split(",")
if not isinstance(the_list, list):
the_list = [the_list]
return the_list
else:
raise NotImplemented("I don't know what type is '%s'" % param_type)
def cast_param_type_to_string(self, param_type, param_value):
'''
Inverse of cast_param_type_from_string
@param param_value: the actual value of the parameter
@param param_type: the type of the parameter (password...)
@returns something: param_value casted to string
'''
if param_type == GenericBackend.TYPE_PASSWORD:
if param_value is None:
return str(-1)
else:
return str(Keyring().set_password(
"GTG stored password -" + self.get_id(), param_value))
elif param_type == GenericBackend.TYPE_LIST_OF_STRINGS:
if param_value == []:
return ""
return reduce(lambda a, b: a + "," + b, param_value)
else:
return str(param_value)