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