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# Copyright 2016 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""
Provides simple state-less wrappers of the proto types used by plugins.
See https://developers.google.com/protocol-buffers/docs/reference/cpp/google.protobuf.descriptor.pb
and https://developers.google.com/protocol-buffers/docs/reference/cpp/google.protobuf.compiler.plugin.pb
"""
import os
import sys
SCRIPT_DIR = os.path.dirname(__file__)
SRC_DIR = os.path.abspath(os.path.join(SCRIPT_DIR, '..', '..', '..', '..'))
sys.path.insert(
1, os.path.join(SRC_DIR, 'third_party', 'protobuf', 'python'))
sys.path.insert(
1, os.path.join(SRC_DIR, 'third_party', 'protobuf', 'third_party', 'six'))
from google.protobuf.descriptor_pb2 import FieldDescriptorProto
from google.protobuf.compiler import plugin_pb2
from . import types
class PluginRequest(object):
def __init__(self, proto):
self.proto = proto
def GetArgs(self):
return dict((v.split('=') for v in self.proto.parameter.split(',')))
def GetAllFiles(self):
files = [ProtoFile(x) for x in self.proto.proto_file]
for f in files:
assert f.Filename() in self.proto.file_to_generate
return files
def PluginRequestFromString(data):
request_proto = plugin_pb2.CodeGeneratorRequest()
request_proto.ParseFromString(data)
return PluginRequest(request_proto)
class PluginResponse(object):
def __init__(self):
self.proto = plugin_pb2.CodeGeneratorResponse()
def AddFileWithContent(self, filename, content):
file_proto = self.proto.file.add()
file_proto.name = filename
file_proto.content = content
def AddError(self, err):
self.proto.error += err + '\n'
def WriteToStdout(self):
stream = sys.stdout if sys.version_info[0] < 3 else sys.stdout.buffer
stream.write(self.proto.SerializeToString())
stream.flush()
class ProtoFile(object):
def __init__(self, proto):
self.proto = proto
self.qualified_types = types.QualifiedTypes(
self.ProtoPackage(),
self.JavaPackage() + '.' + self.JavaOuterClass(),
self.CppBaseNamespace(),
self.CppConverterNamespace()
)
def Filename(self):
return self.proto.name
def CheckSupported(self):
if self.proto.service:
return 'Services are not supported'
if self.proto.extension:
return 'Extensions are not supported'
for child in self.GetMessages() + self.GetEnums():
err = child.CheckSupported()
if err:
return err
def ProtoPackage(self):
return self.proto.package if self.proto.HasField('package') else ''
def ProtoNamespaces(self):
return self.ProtoPackage().split('.')
def CppBaseNamespace(self):
return '::'.join(self.ProtoNamespaces())
def CppBaseHeader(self):
assert self.proto.name.endswith('.proto')
return self.proto.name[:-5] + 'pb.h'
def CppConverterNamespace(self):
return self.CppBaseNamespace() + '::json'
def JavaPackage(self):
if self.proto.options.HasField('java_package'):
return self.proto.options.java_package
else:
return self.ProtoPackage()
def GetMessages(self):
return [ProtoMessage(n, self.qualified_types)
for n in self.proto.message_type]
def GetEnums(self):
return [ProtoEnum(n, self.qualified_types) for n in self.proto.enum_type]
def GetDependencies(self):
# import is not supported
assert [] == self.proto.dependency
return [types.GetProtoFileForFilename(x) for x in self.proto.dependency]
def JavaFilename(self):
return '/'.join(self.JavaQualifiedOuterClass().split('.')) + '.java'
def JavaOuterClass(self):
if self.proto.options.HasField('java_outer_classname'):
return self.proto.options.java_outer_classname
basename, _ = os.path.splitext(os.path.basename(self.proto.name))
return types.TitleCase(basename)
def JavaQualifiedOuterClass(self):
return self.qualified_types.java
def CppConverterFilename(self):
assert self.proto.name.endswith('.proto')
return self.proto.name[:-6] + '_json_converter.h'
class ProtoMessage(object):
def __init__(self, proto, parent_typenames):
self.proto = proto
self.qualified_types = types.QualifiedTypesForChild(
proto.name, parent_typenames)
def CheckSupported(self):
if self.proto.extension_range:
return 'Extensions are not supported: ' + self.proto.extension_range
for child in self.GetFields() + self.GetMessages() + self.GetEnums():
err = child.CheckSupported()
if err:
return err
def QualifiedTypes(self):
return self.qualified_types
def JavaClassName(self):
return types.TitleCase(self.proto.name)
def CppConverterClassName(self):
return types.TitleCase(self.proto.name)
def GetFields(self):
return [ProtoField(x) for x in self.proto.field]
def GetMessages(self):
return [ProtoMessage(n, self.qualified_types)
for n in self.proto.nested_type]
def GetEnums(self):
return [ProtoEnum(n, self.qualified_types) for n in self.proto.enum_type]
class ProtoField(object):
def __init__(self, field_proto):
self.proto = field_proto
self.name = field_proto.name
if self.IsClassType() and not self.proto.HasField('type_name'):
raise TypeError('expected type_name')
def Extendee(self):
return self.proto.extendee if self.proto.HasField('extendee') else None
def IsOptional(self):
return self.proto.label == FieldDescriptorProto.LABEL_OPTIONAL
def IsRepeated(self):
return self.proto.label == FieldDescriptorProto.LABEL_REPEATED
def IsRequired(self):
return self.proto.label == FieldDescriptorProto.LABEL_REQUIRED
def IsClassType(self):
return self.proto.type == FieldDescriptorProto.TYPE_MESSAGE
def IsEnumType(self):
return self.proto.type == FieldDescriptorProto.TYPE_ENUM
def JavaType(self):
if self.IsClassType():
return types.ResolveJavaClassType(self.proto.type_name)
elif self.IsEnumType():
return 'int'
else:
return types.GetJavaPrimitiveType(self.proto.type)
def JavaListType(self):
return types.GetJavaObjectType(self.JavaType())
def JavascriptIndex(self):
return self.proto.number
def JavaName(self):
return types.TitleCase(self.name)
def CppConverterType(self):
return types.ResolveCppConverterType(self.proto.type_name)
def CppPrimitiveType(self):
assert not self.IsClassType()
return types.GetCppPrimitiveType(self.proto.type)
def CppValueType(self):
return types.GetCppValueType(self.CppPrimitiveType())
def CppValuePredicate(self, variable_name):
return types.GetCppValuePredicate(self.CppPrimitiveType(), variable_name)
def CheckSupported(self):
if self.Extendee():
return 'Unsupported field extension: ' + self.DebugString()
if self.JavaType() is None:
return 'Unsupported type for field: ' + self.DebugString()
if self.IsRequired():
return 'Required fields not supported: ' + self.DebugString()
if self.proto.HasField('default_value'):
return 'Default values are not supported: ' + self.DebugString()
return None
def DebugString(self):
return '{name}, {type}, {extendee}'.format(
name=self.name,
type=self.proto.type,
extendee=self.Extendee())
class ProtoEnum(object):
def __init__(self, proto, parent_typenames):
self.proto = proto
self.qualified_types = types.QualifiedTypesForChild(
proto.name, parent_typenames)
def CheckSupported(self):
if self.proto.HasField('options'):
return 'Enum options are not supported: ' + self.DebugString()
for val in self.Values():
err = val.CheckSupported()
if err:
return err + ' ' + self.DebugString()
def QualifiedTypes(self):
return self.qualified_types
def JavaName(self):
return types.TitleCase(self.proto.name)
def Values(self):
return [ProtoEnumValue(x) for x in self.proto.value]
class ProtoEnumValue(object):
def __init__(self, enum_value_proto):
self.proto = enum_value_proto
def GetName(self):
return self.proto.name
def GetValue(self):
return self.proto.number
def CheckSupported(self):
if self.proto.HasField('options'):
return 'Enum value options are not supported: {} {}'.format(
self.proto.name, self.proto.value)
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