85 lines
2.2 KiB
Python
85 lines
2.2 KiB
Python
# Copyright 2018 Google LLC
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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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# https://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 google.protobuf import wrappers_pb2
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class WrapperRule:
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"""A marshal for converting the protobuf wrapper classes to Python.
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This class converts between ``google.protobuf.BoolValue``,
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``google.protobuf.StringValue``, and their siblings to the appropriate
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Python equivalents.
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These are effectively similar to the protobuf primitives except
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that None becomes a possible value.
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"""
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def to_python(self, value, *, absent: bool = None):
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if isinstance(value, self._proto_type):
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if absent:
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return None
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return value.value
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return value
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def to_proto(self, value):
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if isinstance(value, self._python_type):
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return self._proto_type(value=value)
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return value
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class DoubleValueRule(WrapperRule):
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_proto_type = wrappers_pb2.DoubleValue
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_python_type = float
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class FloatValueRule(WrapperRule):
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_proto_type = wrappers_pb2.FloatValue
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_python_type = float
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class Int64ValueRule(WrapperRule):
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_proto_type = wrappers_pb2.Int64Value
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_python_type = int
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class UInt64ValueRule(WrapperRule):
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_proto_type = wrappers_pb2.UInt64Value
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_python_type = int
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class Int32ValueRule(WrapperRule):
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_proto_type = wrappers_pb2.Int32Value
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_python_type = int
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class UInt32ValueRule(WrapperRule):
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_proto_type = wrappers_pb2.UInt32Value
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_python_type = int
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class BoolValueRule(WrapperRule):
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_proto_type = wrappers_pb2.BoolValue
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_python_type = bool
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class StringValueRule(WrapperRule):
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_proto_type = wrappers_pb2.StringValue
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_python_type = str
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class BytesValueRule(WrapperRule):
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_proto_type = wrappers_pb2.BytesValue
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_python_type = bytes
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