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Diffstat (limited to 'python/google/protobuf/pyext/cpp_message.py')
| -rw-r--r-- | python/google/protobuf/pyext/cpp_message.py | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/python/google/protobuf/pyext/cpp_message.py b/python/google/protobuf/pyext/cpp_message.py new file mode 100644 index 0000000..dcf34a0 --- /dev/null +++ b/python/google/protobuf/pyext/cpp_message.py @@ -0,0 +1,61 @@ +# 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. + +"""Protocol message implementation hooks for C++ implementation. + +Contains helper functions used to create protocol message classes from +Descriptor objects at runtime backed by the protocol buffer C++ API. +""" + +__author__ = 'tibell@google.com (Johan Tibell)' + +from google.protobuf.pyext import _message +from google.protobuf import message + + +def NewMessage(bases, message_descriptor, dictionary): + """Creates a new protocol message *class*.""" + new_bases = [] + for base in bases: + if base is message.Message: + # _message.Message must come before message.Message as it + # overrides methods in that class. + new_bases.append(_message.Message) + new_bases.append(base) + return tuple(new_bases) + + +def InitMessage(message_descriptor, cls): + """Constructs a new message instance (called before instance's __init__).""" + + def SubInit(self, **kwargs): + super(cls, self).__init__(message_descriptor, **kwargs) + cls.__init__ = SubInit + cls.AddDescriptors(message_descriptor) |