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