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# -*- coding: utf-8 -*-
# Copyright 2014-2016 OpenMarket Ltd
#
# 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.
import json
from frozendict import frozendict
def freeze(o):
if isinstance(o, dict):
return frozendict({k: freeze(v) for k, v in o.items()})
if isinstance(o, frozendict):
return o
if isinstance(o, (bytes, str)):
return o
try:
return tuple(freeze(i) for i in o)
except TypeError:
pass
return o
def unfreeze(o):
if isinstance(o, (dict, frozendict)):
return dict({k: unfreeze(v) for k, v in o.items()})
if isinstance(o, (bytes, str)):
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 frozendicts without barfing.
# Additionally reduce the whitespace produced by JSON encoding.
frozendict_json_encoder = json.JSONEncoder(
allow_nan=False, separators=(",", ":"), default=_handle_frozendict,
)
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