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builder.py
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# 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. """Builds descriptors, message classes and services for generated _pb2.py. This file is only called in python generated _pb2.py files. It builds descriptors, message classes and services that users can directly use in generated code. """ __author__ = 'jieluo@google.com (Jie Luo)' from google.protobuf.internal import enum_type_wrapper from google.protobuf import message as _message from google.protobuf import reflection as _reflection from google.protobuf import symbol_database as _symbol_database _sym_db = _symbol_database.Default() def BuildMessageAndEnumDescriptors(file_des, module): """Builds message and enum descriptors. Args: file_des: FileDescriptor of the .proto file module: Generated _pb2 module """ def BuildNestedDescriptors(msg_des, prefix): for (name, nested_msg) in msg_des.nested_types_by_name.items(): module_name = prefix + name.upper() module[module_name] = nested_msg BuildNestedDescriptors(nested_msg, module_name + '_') for enum_des in msg_des.enum_types: module[prefix + enum_des.name.upper()] = enum_des for (name, msg_des) in file_des.message_types_by_name.items(): module_name = '_' + name.upper() module[module_name] = msg_des BuildNestedDescriptors(msg_des, module_name + '_') def BuildTopDescriptorsAndMessages(file_des, module_name, module): """Builds top level descriptors and message classes. Args: file_des: FileDescriptor of the .proto file module_name: str, the name of generated _pb2 module module: Generated _pb2 module """ def BuildMessage(msg_des): create_dict = {} for (name, nested_msg) in msg_des.nested_types_by_name.items(): create_dict[name] = BuildMessage(nested_msg) create_dict['DESCRIPTOR'] = msg_des create_dict['__module__'] = module_name message_class = _reflection.GeneratedProtocolMessageType( msg_des.name, (_message.Message,), create_dict) _sym_db.RegisterMessage(message_class) return message_class # top level enums for (name, enum_des) in file_des.enum_types_by_name.items(): module['_' + name.upper()] = enum_des module[name] = enum_type_wrapper.EnumTypeWrapper(enum_des) for enum_value in enum_des.values: module[enum_value.name] = enum_value.number # top level extensions for (name, extension_des) in file_des.extensions_by_name.items(): module[name.upper() + '_FIELD_NUMBER'] = extension_des.number module[name] = extension_des # services for (name, service) in file_des.services_by_name.items(): module['_' + name.upper()] = service # Build messages. for (name, msg_des) in file_des.message_types_by_name.items(): module[name] = BuildMessage(msg_des) def BuildServices(file_des, module_name, module): """Builds services classes and services stub class. Args: file_des: FileDescriptor of the .proto file module_name: str, the name of generated _pb2 module module: Generated _pb2 module """ # pylint: disable=g-import-not-at-top from google.protobuf import service as _service from google.protobuf import service_reflection # pylint: enable=g-import-not-at-top for (name, service) in file_des.services_by_name.items(): module[name] = service_reflection.GeneratedServiceType( name, (_service.Service,), dict(DESCRIPTOR=service, __module__=module_name)) stub_name = name + '_Stub' module[stub_name] = service_reflection.GeneratedServiceStubType( stub_name, (module[name],), dict(DESCRIPTOR=service, __module__=module_name))