52 lines
1.6 KiB
Python
52 lines
1.6 KiB
Python
# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# 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, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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class Formatter(object):
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@classmethod
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def serialize(cls, value):
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"""Return a string representing the formatted value"""
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raise NotImplementedError
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@classmethod
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def deserialize(cls, value):
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"""Return a formatted object representing the value"""
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raise NotImplementedError
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class BoolStr(Formatter):
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@classmethod
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def deserialize(cls, value):
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"""Convert a boolean string to a boolean"""
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expr = str(value).lower()
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if "true" == expr:
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return True
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elif "false" == expr:
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return False
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else:
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raise ValueError("Unable to deserialize boolean string: %s"
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% value)
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@classmethod
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def serialize(cls, value):
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"""Convert a boolean to a boolean string"""
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if isinstance(value, bool):
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if value:
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return "true"
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else:
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return "false"
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else:
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raise ValueError("Unable to serialize boolean string: %s"
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% value)
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