anonymousland-synapse/synapse/util/frozenutils.py

71 lines
1.9 KiB
Python
Raw Normal View History

2014-12-08 04:10:12 -05:00
# -*- coding: utf-8 -*-
2016-01-06 23:26:29 -05:00
# Copyright 2014-2016 OpenMarket Ltd
2014-12-08 04:10:12 -05:00
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from six import binary_type, text_type
2014-12-08 04:10:12 -05:00
2018-07-09 02:09:20 -04:00
from canonicaljson import json
from frozendict import frozendict
2018-05-29 11:35:55 -04:00
2014-12-08 04:10:12 -05:00
def freeze(o):
2018-05-24 15:44:10 -04:00
if isinstance(o, dict):
2014-12-08 04:10:12 -05:00
return frozendict({k: freeze(v) for k, v in o.items()})
2018-05-24 15:44:10 -04:00
if isinstance(o, frozendict):
return o
if isinstance(o, (binary_type, text_type)):
2014-12-08 04:10:12 -05:00
return o
try:
return tuple([freeze(i) for i in o])
except TypeError:
pass
return o
def unfreeze(o):
2018-05-24 15:44:10 -04:00
if isinstance(o, (dict, frozendict)):
2014-12-08 04:10:12 -05:00
return dict({k: unfreeze(v) for k, v in o.items()})
if isinstance(o, (binary_type, text_type)):
2014-12-08 04:10:12 -05:00
return o
try:
return [unfreeze(i) for i in o]
except TypeError:
pass
return o
def _handle_frozendict(obj):
"""Helper for EventEncoder. Makes frozendicts serializable by returning
the underlying dict
"""
if type(obj) is frozendict:
# fishing the protected dict out of the object is a bit nasty,
# but we don't really want the overhead of copying the dict.
return obj._dict
raise TypeError('Object of type %s is not JSON serializable' %
obj.__class__.__name__)
# A JSONEncoder which is capable of encoding frozendics without barfing
frozendict_json_encoder = json.JSONEncoder(
default=_handle_frozendict,
)