60 lines
1.9 KiB
Python
60 lines
1.9 KiB
Python
# Copyright (c) 2014 Rackspace, Inc.
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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
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# 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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import inspect
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try:
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import ordereddict as collections
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except ImportError: # pragma: no cover
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import collections # pragma: no cover
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class DictSerializableModel(object):
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"""A model mixin: class dictionarizable-undictionarizable class mixin.
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A class that can be deserialized from a dictionary and can be serialized
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into a dictionary
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"""
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def to_dict(self):
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"""Return dict representation (serialize into dictionary) of the class.
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"""
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items = [(name, value) for name, value in
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inspect.getmembers(self, lambda o: not inspect.ismethod(o))
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if not name.startswith("_")]
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return collections.OrderedDict(items)
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def from_dict(self, attributes):
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"""Convert a dictionary into a object/Or copy constructor
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Update the current instance based on attribute->value items in
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*attributes* dictionary.
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"""
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for attribute in attributes:
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setattr(self, attribute, attributes[attribute])
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return self
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@classmethod
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def init_from_dict(cls, input_dict):
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"""Construct a model instance from a dictionary.
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This is only meant to be used for converting a
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response model into a model.
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When converting a request-model into a model,
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use to_dict.
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"""
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raise NotImplementedError
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