66 lines
2.8 KiB
Python
66 lines
2.8 KiB
Python
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# Protocol Buffers - Google's data interchange format
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# Copyright 2008 Google Inc. All rights reserved.
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# https://developers.google.com/protocol-buffers/
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are
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# met:
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#
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# * Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# * Redistributions in binary form must reproduce the above
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# copyright notice, this list of conditions and the following disclaimer
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# in the documentation and/or other materials provided with the
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# distribution.
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# * Neither the name of Google Inc. nor the names of its
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# contributors may be used to endorse or promote products derived from
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# this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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"""Protocol message implementation hooks for C++ implementation.
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Contains helper functions used to create protocol message classes from
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Descriptor objects at runtime backed by the protocol buffer C++ API.
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"""
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__author__ = 'tibell@google.com (Johan Tibell)'
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from google.protobuf.pyext import _message
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class GeneratedProtocolMessageType(_message.MessageMeta):
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"""Metaclass for protocol message classes created at runtime from Descriptors.
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The protocol compiler currently uses this metaclass to create protocol
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message classes at runtime. Clients can also manually create their own
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classes at runtime, as in this example:
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mydescriptor = Descriptor(.....)
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factory = symbol_database.Default()
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factory.pool.AddDescriptor(mydescriptor)
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MyProtoClass = factory.GetPrototype(mydescriptor)
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myproto_instance = MyProtoClass()
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myproto.foo_field = 23
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...
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The above example will not work for nested types. If you wish to include them,
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use reflection.MakeClass() instead of manually instantiating the class in
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order to create the appropriate class structure.
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"""
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# Must be consistent with the protocol-compiler code in
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# proto2/compiler/internal/generator.*.
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_DESCRIPTOR_KEY = 'DESCRIPTOR'
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