1# Protocol Buffers - Google's data interchange format 2# Copyright 2008 Google Inc. All rights reserved. 3# https://developers.google.com/protocol-buffers/ 4# 5# Redistribution and use in source and binary forms, with or without 6# modification, are permitted provided that the following conditions are 7# met: 8# 9# * Redistributions of source code must retain the above copyright 10# notice, this list of conditions and the following disclaimer. 11# * Redistributions in binary form must reproduce the above 12# copyright notice, this list of conditions and the following disclaimer 13# in the documentation and/or other materials provided with the 14# distribution. 15# * Neither the name of Google Inc. nor the names of its 16# contributors may be used to endorse or promote products derived from 17# this software without specific prior written permission. 18# 19# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 22# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 23# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 24# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 25# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 29# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 31"""Protocol message implementation hooks for C++ implementation. 32 33Contains helper functions used to create protocol message classes from 34Descriptor objects at runtime backed by the protocol buffer C++ API. 35""" 36 37__author__ = '[email protected] (Johan Tibell)' 38 39from google.protobuf.internal import api_implementation 40 41 42# pylint: disable=protected-access 43_message = api_implementation._c_module 44# TODO(jieluo): Remove this import after fix api_implementation 45if _message is None: 46 from google.protobuf.pyext import _message 47 48 49class GeneratedProtocolMessageType(_message.MessageMeta): 50 51 """Metaclass for protocol message classes created at runtime from Descriptors. 52 53 The protocol compiler currently uses this metaclass to create protocol 54 message classes at runtime. Clients can also manually create their own 55 classes at runtime, as in this example: 56 57 mydescriptor = Descriptor(.....) 58 factory = symbol_database.Default() 59 factory.pool.AddDescriptor(mydescriptor) 60 MyProtoClass = factory.GetPrototype(mydescriptor) 61 myproto_instance = MyProtoClass() 62 myproto.foo_field = 23 63 ... 64 65 The above example will not work for nested types. If you wish to include them, 66 use reflection.MakeClass() instead of manually instantiating the class in 67 order to create the appropriate class structure. 68 """ 69 70 # Must be consistent with the protocol-compiler code in 71 # proto2/compiler/internal/generator.*. 72 _DESCRIPTOR_KEY = 'DESCRIPTOR' 73