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Diffstat (limited to 'python/google/protobuf/internal/enum_type_wrapper.py')
-rw-r--r-- | python/google/protobuf/internal/enum_type_wrapper.py | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/python/google/protobuf/internal/enum_type_wrapper.py b/python/google/protobuf/internal/enum_type_wrapper.py new file mode 100644 index 0000000..1cffe35 --- /dev/null +++ b/python/google/protobuf/internal/enum_type_wrapper.py @@ -0,0 +1,89 @@ +# Protocol Buffers - Google's data interchange format +# Copyright 2008 Google Inc. All rights reserved. +# https://developers.google.com/protocol-buffers/ +# +# Redistribution and use in source and binary forms, with or without +# modification, are permitted provided that the following conditions are +# met: +# +# * Redistributions of source code must retain the above copyright +# notice, this list of conditions and the following disclaimer. +# * Redistributions in binary form must reproduce the above +# copyright notice, this list of conditions and the following disclaimer +# in the documentation and/or other materials provided with the +# distribution. +# * Neither the name of Google Inc. nor the names of its +# contributors may be used to endorse or promote products derived from +# this software without specific prior written permission. +# +# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +"""A simple wrapper around enum types to expose utility functions. + +Instances are created as properties with the same name as the enum they wrap +on proto classes. For usage, see: + reflection_test.py +""" + +__author__ = 'rabsatt@google.com (Kevin Rabsatt)' + + +class EnumTypeWrapper(object): + """A utility for finding the names of enum values.""" + + DESCRIPTOR = None + + def __init__(self, enum_type): + """Inits EnumTypeWrapper with an EnumDescriptor.""" + self._enum_type = enum_type + self.DESCRIPTOR = enum_type; + + def Name(self, number): + """Returns a string containing the name of an enum value.""" + if number in self._enum_type.values_by_number: + return self._enum_type.values_by_number[number].name + raise ValueError('Enum %s has no name defined for value %d' % ( + self._enum_type.name, number)) + + def Value(self, name): + """Returns the value coresponding to the given enum name.""" + if name in self._enum_type.values_by_name: + return self._enum_type.values_by_name[name].number + raise ValueError('Enum %s has no value defined for name %s' % ( + self._enum_type.name, name)) + + def keys(self): + """Return a list of the string names in the enum. + + These are returned in the order they were defined in the .proto file. + """ + + return [value_descriptor.name + for value_descriptor in self._enum_type.values] + + def values(self): + """Return a list of the integer values in the enum. + + These are returned in the order they were defined in the .proto file. + """ + + return [value_descriptor.number + for value_descriptor in self._enum_type.values] + + def items(self): + """Return a list of the (name, value) pairs of the enum. + + These are returned in the order they were defined in the .proto file. + """ + return [(value_descriptor.name, value_descriptor.number) + for value_descriptor in self._enum_type.values] |