119 lines
4.0 KiB
Python
119 lines
4.0 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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#
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# Use of this source code is governed by a BSD-style
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# license that can be found in the LICENSE file or at
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# https://developers.google.com/open-source/licenses/bsd
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"""Builds descriptors, message classes and services for generated _pb2.py.
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This file is only called in python generated _pb2.py files. It builds
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descriptors, message classes and services that users can directly use
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in generated code.
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"""
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__author__ = 'jieluo@google.com (Jie Luo)'
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from google.protobuf.internal import enum_type_wrapper
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from google.protobuf.internal import python_message
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from google.protobuf import message as _message
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from google.protobuf import reflection as _reflection
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from google.protobuf import symbol_database as _symbol_database
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_sym_db = _symbol_database.Default()
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def BuildMessageAndEnumDescriptors(file_des, module):
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"""Builds message and enum descriptors.
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Args:
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file_des: FileDescriptor of the .proto file
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module: Generated _pb2 module
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"""
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def BuildNestedDescriptors(msg_des, prefix):
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for (name, nested_msg) in msg_des.nested_types_by_name.items():
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module_name = prefix + name.upper()
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module[module_name] = nested_msg
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BuildNestedDescriptors(nested_msg, module_name + '_')
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for enum_des in msg_des.enum_types:
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module[prefix + enum_des.name.upper()] = enum_des
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for (name, msg_des) in file_des.message_types_by_name.items():
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module_name = '_' + name.upper()
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module[module_name] = msg_des
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BuildNestedDescriptors(msg_des, module_name + '_')
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def BuildTopDescriptorsAndMessages(file_des, module_name, module):
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"""Builds top level descriptors and message classes.
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Args:
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file_des: FileDescriptor of the .proto file
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module_name: str, the name of generated _pb2 module
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module: Generated _pb2 module
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"""
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def BuildMessage(msg_des):
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create_dict = {}
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for (name, nested_msg) in msg_des.nested_types_by_name.items():
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create_dict[name] = BuildMessage(nested_msg)
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create_dict['DESCRIPTOR'] = msg_des
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create_dict['__module__'] = module_name
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message_class = _reflection.GeneratedProtocolMessageType(
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msg_des.name, (_message.Message,), create_dict)
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_sym_db.RegisterMessage(message_class)
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return message_class
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# top level enums
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for (name, enum_des) in file_des.enum_types_by_name.items():
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module['_' + name.upper()] = enum_des
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module[name] = enum_type_wrapper.EnumTypeWrapper(enum_des)
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for enum_value in enum_des.values:
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module[enum_value.name] = enum_value.number
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# top level extensions
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for (name, extension_des) in file_des.extensions_by_name.items():
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module[name.upper() + '_FIELD_NUMBER'] = extension_des.number
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module[name] = extension_des
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# services
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for (name, service) in file_des.services_by_name.items():
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module['_' + name.upper()] = service
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# Build messages.
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for (name, msg_des) in file_des.message_types_by_name.items():
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module[name] = BuildMessage(msg_des)
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def AddHelpersToExtensions(file_des):
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"""no-op to keep old generated code work with new runtime.
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Args:
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file_des: FileDescriptor of the .proto file
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"""
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# TODO: Remove this on-op
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return
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def BuildServices(file_des, module_name, module):
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"""Builds services classes and services stub class.
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Args:
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file_des: FileDescriptor of the .proto file
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module_name: str, the name of generated _pb2 module
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module: Generated _pb2 module
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"""
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# pylint: disable=g-import-not-at-top
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from google.protobuf import service as _service
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from google.protobuf import service_reflection
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# pylint: enable=g-import-not-at-top
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for (name, service) in file_des.services_by_name.items():
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module[name] = service_reflection.GeneratedServiceType(
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name, (_service.Service,),
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dict(DESCRIPTOR=service, __module__=module_name))
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stub_name = name + '_Stub'
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module[stub_name] = service_reflection.GeneratedServiceStubType(
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stub_name, (module[name],),
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dict(DESCRIPTOR=service, __module__=module_name))
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