Python google.protobuf.descriptor.FieldDescriptor() Examples
The following are 30 code examples for showing how to use google.protobuf.descriptor.FieldDescriptor(). These examples are extracted from open source projects. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example.
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Example 1
Project: lambda-packs Author: ryfeus File: descriptor_pool.py License: MIT License | 6 votes |
def _CheckConflictRegister(self, desc): """Check if the descriptor name conflicts with another of the same name. Args: desc: Descriptor of a message, enum, service or extension. """ desc_name = desc.full_name for register, descriptor_type in [ (self._descriptors, descriptor.Descriptor), (self._enum_descriptors, descriptor.EnumDescriptor), (self._service_descriptors, descriptor.ServiceDescriptor), (self._toplevel_extensions, descriptor.FieldDescriptor)]: if desc_name in register: file_name = register[desc_name].file.name if not isinstance(desc, descriptor_type) or ( file_name != desc.file.name): warn_msg = ('Conflict register for file "' + desc.file.name + '": ' + desc_name + ' is already defined in file "' + file_name + '"') warnings.warn(warn_msg, RuntimeWarning) return
Example 2
Project: lambda-packs Author: ryfeus File: descriptor_pool.py License: MIT License | 6 votes |
def AddFileDescriptor(self, file_desc): """Adds a FileDescriptor to the pool, non-recursively. If the FileDescriptor contains messages or enums, the caller must explicitly register them. Args: file_desc: A FileDescriptor. """ self._AddFileDescriptor(file_desc) # TODO(jieluo): This is a temporary solution for FieldDescriptor.file. # FieldDescriptor.file is added in code gen. Remove this solution after # maybe 2020 for compatibility reason (with 3.4.1 only). for extension in list(file_desc.extensions_by_name.values()): self._file_desc_by_toplevel_extension[ extension.full_name] = file_desc
Example 3
Project: lambda-packs Author: ryfeus File: python_message.py License: MIT License | 6 votes |
def _AddPropertiesForField(field, cls): """Adds a public property for a protocol message field. Clients can use this property to get and (in the case of non-repeated scalar fields) directly set the value of a protocol message field. Args: field: A FieldDescriptor for this field. cls: The class we're constructing. """ # Catch it if we add other types that we should # handle specially here. assert _FieldDescriptor.MAX_CPPTYPE == 10 constant_name = field.name.upper() + "_FIELD_NUMBER" setattr(cls, constant_name, field.number) if field.label == _FieldDescriptor.LABEL_REPEATED: _AddPropertiesForRepeatedField(field, cls) elif field.cpp_type == _FieldDescriptor.CPPTYPE_MESSAGE: _AddPropertiesForNonRepeatedCompositeField(field, cls) else: _AddPropertiesForNonRepeatedScalarField(field, cls)
Example 4
Project: auto-alt-text-lambda-api Author: abhisuri97 File: descriptor_pool.py License: MIT License | 6 votes |
def FindExtensionByName(self, full_name): """Loads the named extension descriptor from the pool. Args: full_name: The full name of the extension descriptor to load. Returns: A FieldDescriptor, describing the named extension. """ full_name = _NormalizeFullyQualifiedName(full_name) message_name, _, extension_name = full_name.rpartition('.') try: # Most extensions are nested inside a message. scope = self.FindMessageTypeByName(message_name) except KeyError: # Some extensions are defined at file scope. scope = self.FindFileContainingSymbol(full_name) return scope.extensions_by_name[extension_name]
Example 5
Project: auto-alt-text-lambda-api Author: abhisuri97 File: python_message.py License: MIT License | 6 votes |
def _AddPropertiesForField(field, cls): """Adds a public property for a protocol message field. Clients can use this property to get and (in the case of non-repeated scalar fields) directly set the value of a protocol message field. Args: field: A FieldDescriptor for this field. cls: The class we're constructing. """ # Catch it if we add other types that we should # handle specially here. assert _FieldDescriptor.MAX_CPPTYPE == 10 constant_name = field.name.upper() + "_FIELD_NUMBER" setattr(cls, constant_name, field.number) if field.label == _FieldDescriptor.LABEL_REPEATED: _AddPropertiesForRepeatedField(field, cls) elif field.cpp_type == _FieldDescriptor.CPPTYPE_MESSAGE: _AddPropertiesForNonRepeatedCompositeField(field, cls) else: _AddPropertiesForNonRepeatedScalarField(field, cls)
Example 6
Project: sklearn-theano Author: sklearn-theano File: python_message.py License: BSD 3-Clause "New" or "Revised" License | 6 votes |
def _AddPropertiesForField(field, cls): """Adds a public property for a protocol message field. Clients can use this property to get and (in the case of non-repeated scalar fields) directly set the value of a protocol message field. Args: field: A FieldDescriptor for this field. cls: The class we're constructing. """ # Catch it if we add other types that we should # handle specially here. assert _FieldDescriptor.MAX_CPPTYPE == 10 constant_name = field.name.upper() + "_FIELD_NUMBER" setattr(cls, constant_name, field.number) if field.label == _FieldDescriptor.LABEL_REPEATED: _AddPropertiesForRepeatedField(field, cls) elif field.cpp_type == _FieldDescriptor.CPPTYPE_MESSAGE: _AddPropertiesForNonRepeatedCompositeField(field, cls) else: _AddPropertiesForNonRepeatedScalarField(field, cls)
Example 7
Project: botchallenge Author: katharosada File: cpp_message.py License: MIT License | 6 votes |
def __getitem__(self, extension): from google.protobuf import descriptor if not isinstance(extension, descriptor.FieldDescriptor): raise KeyError('Bad extension %r.' % (extension,)) cdescriptor = extension._cdescriptor if (cdescriptor.label != _LABEL_REPEATED and cdescriptor.cpp_type != _CPPTYPE_MESSAGE): return self._cmsg.GetScalar(cdescriptor) ext = self._values.get(extension, None) if ext is not None: return ext ext = self._CreateNewHandle(extension) self._values[extension] = ext return ext
Example 8
Project: botchallenge Author: katharosada File: python_message.py License: MIT License | 6 votes |
def _AddPropertiesForField(field, cls): """Adds a public property for a protocol message field. Clients can use this property to get and (in the case of non-repeated scalar fields) directly set the value of a protocol message field. Args: field: A FieldDescriptor for this field. cls: The class we're constructing. """ # Catch it if we add other types that we should # handle specially here. assert _FieldDescriptor.MAX_CPPTYPE == 10 constant_name = field.name.upper() + "_FIELD_NUMBER" setattr(cls, constant_name, field.number) if field.label == _FieldDescriptor.LABEL_REPEATED: _AddPropertiesForRepeatedField(field, cls) elif field.cpp_type == _FieldDescriptor.CPPTYPE_MESSAGE: _AddPropertiesForNonRepeatedCompositeField(field, cls) else: _AddPropertiesForNonRepeatedScalarField(field, cls)
Example 9
Project: botchallenge Author: katharosada File: python_message.py License: MIT License | 6 votes |
def _BytesForNonRepeatedElement(value, field_number, field_type): """Returns the number of bytes needed to serialize a non-repeated element. The returned byte count includes space for tag information and any other additional space associated with serializing value. Args: value: Value we're serializing. field_number: Field number of this value. (Since the field number is stored as part of a varint-encoded tag, this has an impact on the total bytes required to serialize the value). field_type: The type of the field. One of the TYPE_* constants within FieldDescriptor. """ try: fn = type_checkers.TYPE_TO_BYTE_SIZE_FN[field_type] return fn(field_number, value) except KeyError: raise message_mod.EncodeError('Unrecognized field type: %d' % field_type)
Example 10
Project: botchallenge Author: katharosada File: type_checkers.py License: MIT License | 6 votes |
def GetTypeChecker(field): """Returns a type checker for a message field of the specified types. Args: field: FieldDescriptor object for this field. Returns: An instance of TypeChecker which can be used to verify the types of values assigned to a field of the specified type. """ if (field.cpp_type == _FieldDescriptor.CPPTYPE_STRING and field.type == _FieldDescriptor.TYPE_STRING): return UnicodeValueChecker() if field.cpp_type == _FieldDescriptor.CPPTYPE_ENUM: return EnumValueChecker(field.enum_type) return _VALUE_CHECKERS[field.cpp_type] # None of the typecheckers below make any attempt to guard against people # subclassing builtin types and doing weird things. We're not trying to # protect against malicious clients here, just people accidentally shooting # themselves in the foot in obvious ways.
Example 11
Project: coremltools Author: apple File: descriptor_pool.py License: BSD 3-Clause "New" or "Revised" License | 6 votes |
def AddFileDescriptor(self, file_desc): """Adds a FileDescriptor to the pool, non-recursively. If the FileDescriptor contains messages or enums, the caller must explicitly register them. Args: file_desc: A FileDescriptor. """ self._AddFileDescriptor(file_desc) # TODO(jieluo): This is a temporary solution for FieldDescriptor.file. # Remove it when FieldDescriptor.file is added in code gen. for extension in file_desc.extensions_by_name.values(): self._file_desc_by_toplevel_extension[ extension.full_name] = file_desc
Example 12
Project: coremltools Author: apple File: python_message.py License: BSD 3-Clause "New" or "Revised" License | 6 votes |
def _AddPropertiesForField(field, cls): """Adds a public property for a protocol message field. Clients can use this property to get and (in the case of non-repeated scalar fields) directly set the value of a protocol message field. Args: field: A FieldDescriptor for this field. cls: The class we're constructing. """ # Catch it if we add other types that we should # handle specially here. assert _FieldDescriptor.MAX_CPPTYPE == 10 constant_name = field.name.upper() + "_FIELD_NUMBER" setattr(cls, constant_name, field.number) if field.label == _FieldDescriptor.LABEL_REPEATED: _AddPropertiesForRepeatedField(field, cls) elif field.cpp_type == _FieldDescriptor.CPPTYPE_MESSAGE: _AddPropertiesForNonRepeatedCompositeField(field, cls) else: _AddPropertiesForNonRepeatedScalarField(field, cls)
Example 13
Project: go2mapillary Author: enricofer File: descriptor_pool.py License: GNU General Public License v3.0 | 6 votes |
def FindExtensionByNumber(self, message_descriptor, number): """Gets the extension of the specified message with the specified number. Extensions have to be registered to this pool by calling AddExtensionDescriptor. Args: message_descriptor: descriptor of the extended message. number: integer, number of the extension field. Returns: A FieldDescriptor describing the extension. Raise: KeyError: when no extension with the given number is known for the specified message. """ return self._extensions_by_number[message_descriptor][number]
Example 14
Project: lambda-packs Author: ryfeus File: descriptor_pool.py License: MIT License | 5 votes |
def _IsMessageSetExtension(field): return (field.is_extension and field.containing_type.has_options and field.containing_type.GetOptions().message_set_wire_format and field.type == descriptor.FieldDescriptor.TYPE_MESSAGE and field.label == descriptor.FieldDescriptor.LABEL_OPTIONAL)
Example 15
Project: lambda-packs Author: ryfeus File: descriptor_pool.py License: MIT License | 5 votes |
def FindExtensionByName(self, full_name): """Loads the named extension descriptor from the pool. Args: full_name: The full name of the extension descriptor to load. Returns: A FieldDescriptor, describing the named extension. Raises: KeyError: if the extension cannot be found in the pool. """ full_name = _NormalizeFullyQualifiedName(full_name) try: # The proto compiler does not give any link between the FileDescriptor # and top-level extensions unless the FileDescriptorProto is added to # the DescriptorDatabase, but this can impact memory usage. # So we registered these extensions by name explicitly. return self._toplevel_extensions[full_name] except KeyError: pass message_name, _, extension_name = full_name.rpartition('.') try: # Most extensions are nested inside a message. scope = self.FindMessageTypeByName(message_name) except KeyError: # Some extensions are defined at file scope. scope = self._FindFileContainingSymbolInDb(full_name) return scope.extensions_by_name[extension_name]
Example 16
Project: lambda-packs Author: ryfeus File: descriptor_pool.py License: MIT License | 5 votes |
def FindAllExtensions(self, message_descriptor): """Gets all the known extension of a given message. Extensions have to be registered to this pool by calling AddExtensionDescriptor. Args: message_descriptor: descriptor of the extended message. Returns: A list of FieldDescriptor describing the extensions. """ return list(self._extensions_by_number[message_descriptor].values())
Example 17
Project: lambda-packs Author: ryfeus File: reflection_test.py License: MIT License | 5 votes |
def testHandWrittenReflection(self): # Hand written extensions are only supported by the pure-Python # implementation of the API. if api_implementation.Type() != 'python': return FieldDescriptor = descriptor.FieldDescriptor foo_field_descriptor = FieldDescriptor( name='foo_field', full_name='MyProto.foo_field', index=0, number=1, type=FieldDescriptor.TYPE_INT64, cpp_type=FieldDescriptor.CPPTYPE_INT64, label=FieldDescriptor.LABEL_OPTIONAL, default_value=0, containing_type=None, message_type=None, enum_type=None, is_extension=False, extension_scope=None, options=descriptor_pb2.FieldOptions()) mydescriptor = descriptor.Descriptor( name='MyProto', full_name='MyProto', filename='ignored', containing_type=None, nested_types=[], enum_types=[], fields=[foo_field_descriptor], extensions=[], options=descriptor_pb2.MessageOptions()) class MyProtoClass(six.with_metaclass(reflection.GeneratedProtocolMessageType, message.Message)): DESCRIPTOR = mydescriptor myproto_instance = MyProtoClass() self.assertEqual(0, myproto_instance.foo_field) self.assertTrue(not myproto_instance.HasField('foo_field')) myproto_instance.foo_field = 23 self.assertEqual(23, myproto_instance.foo_field) self.assertTrue(myproto_instance.HasField('foo_field'))
Example 18
Project: lambda-packs Author: ryfeus File: reflection_test.py License: MIT License | 5 votes |
def testPackedOptions(self): proto = unittest_pb2.TestAllTypes() proto.optional_int32 = 1 proto.optional_double = 3.0 for field_descriptor, _ in proto.ListFields(): self.assertEqual(False, field_descriptor.GetOptions().packed) proto = unittest_pb2.TestPackedTypes() proto.packed_int32.append(1) proto.packed_double.append(3.0) for field_descriptor, _ in proto.ListFields(): self.assertEqual(True, field_descriptor.GetOptions().packed) self.assertEqual(descriptor.FieldDescriptor.LABEL_REPEATED, field_descriptor.label)
Example 19
Project: lambda-packs Author: ryfeus File: python_message.py License: MIT License | 5 votes |
def _IsPresent(item): """Given a (FieldDescriptor, value) tuple from _fields, return true if the value should be included in the list returned by ListFields().""" if item[0].label == _FieldDescriptor.LABEL_REPEATED: return bool(item[1]) elif item[0].cpp_type == _FieldDescriptor.CPPTYPE_MESSAGE: return item[1]._is_present_in_parent else: return True
Example 20
Project: lambda-packs Author: ryfeus File: type_checkers.py License: MIT License | 5 votes |
def GetTypeChecker(field): """Returns a type checker for a message field of the specified types. Args: field: FieldDescriptor object for this field. Returns: An instance of TypeChecker which can be used to verify the types of values assigned to a field of the specified type. """ if (field.cpp_type == _FieldDescriptor.CPPTYPE_STRING and field.type == _FieldDescriptor.TYPE_STRING): return UnicodeValueChecker() if field.cpp_type == _FieldDescriptor.CPPTYPE_ENUM: if SupportsOpenEnums(field): # When open enums are supported, any int32 can be assigned. return _VALUE_CHECKERS[_FieldDescriptor.CPPTYPE_INT32] else: return EnumValueChecker(field.enum_type) return _VALUE_CHECKERS[field.cpp_type] # None of the typecheckers below make any attempt to guard against people # subclassing builtin types and doing weird things. We're not trying to # protect against malicious clients here, just people accidentally shooting # themselves in the foot in obvious ways.
Example 21
Project: auto-alt-text-lambda-api Author: abhisuri97 File: descriptor_pool.py License: MIT License | 5 votes |
def _MakeFieldDescriptor(self, field_proto, message_name, index, is_extension=False): """Creates a field descriptor from a FieldDescriptorProto. For message and enum type fields, this method will do a look up in the pool for the appropriate descriptor for that type. If it is unavailable, it will fall back to the _source function to create it. If this type is still unavailable, construction will fail. Args: field_proto: The proto describing the field. message_name: The name of the containing message. index: Index of the field is_extension: Indication that this field is for an extension. Returns: An initialized FieldDescriptor object """ if message_name: full_name = '.'.join((message_name, field_proto.name)) else: full_name = field_proto.name return descriptor.FieldDescriptor( name=field_proto.name, full_name=full_name, index=index, number=field_proto.number, type=field_proto.type, cpp_type=None, message_type=None, enum_type=None, containing_type=None, label=field_proto.label, has_default_value=False, default_value=None, is_extension=is_extension, extension_scope=None, options=_OptionsOrNone(field_proto))
Example 22
Project: auto-alt-text-lambda-api Author: abhisuri97 File: reflection_test.py License: MIT License | 5 votes |
def testHandWrittenReflection(self): # Hand written extensions are only supported by the pure-Python # implementation of the API. if api_implementation.Type() != 'python': return FieldDescriptor = descriptor.FieldDescriptor foo_field_descriptor = FieldDescriptor( name='foo_field', full_name='MyProto.foo_field', index=0, number=1, type=FieldDescriptor.TYPE_INT64, cpp_type=FieldDescriptor.CPPTYPE_INT64, label=FieldDescriptor.LABEL_OPTIONAL, default_value=0, containing_type=None, message_type=None, enum_type=None, is_extension=False, extension_scope=None, options=descriptor_pb2.FieldOptions()) mydescriptor = descriptor.Descriptor( name='MyProto', full_name='MyProto', filename='ignored', containing_type=None, nested_types=[], enum_types=[], fields=[foo_field_descriptor], extensions=[], options=descriptor_pb2.MessageOptions()) class MyProtoClass(six.with_metaclass(reflection.GeneratedProtocolMessageType, message.Message)): DESCRIPTOR = mydescriptor myproto_instance = MyProtoClass() self.assertEqual(0, myproto_instance.foo_field) self.assertTrue(not myproto_instance.HasField('foo_field')) myproto_instance.foo_field = 23 self.assertEqual(23, myproto_instance.foo_field) self.assertTrue(myproto_instance.HasField('foo_field'))
Example 23
Project: auto-alt-text-lambda-api Author: abhisuri97 File: reflection_test.py License: MIT License | 5 votes |
def testPackedOptions(self): proto = unittest_pb2.TestAllTypes() proto.optional_int32 = 1 proto.optional_double = 3.0 for field_descriptor, _ in proto.ListFields(): self.assertEqual(False, field_descriptor.GetOptions().packed) proto = unittest_pb2.TestPackedTypes() proto.packed_int32.append(1) proto.packed_double.append(3.0) for field_descriptor, _ in proto.ListFields(): self.assertEqual(True, field_descriptor.GetOptions().packed) self.assertEqual(descriptor.FieldDescriptor.LABEL_REPEATED, field_descriptor.label)
Example 24
Project: auto-alt-text-lambda-api Author: abhisuri97 File: python_message.py License: MIT License | 5 votes |
def _IsPresent(item): """Given a (FieldDescriptor, value) tuple from _fields, return true if the value should be included in the list returned by ListFields().""" if item[0].label == _FieldDescriptor.LABEL_REPEATED: return bool(item[1]) elif item[0].cpp_type == _FieldDescriptor.CPPTYPE_MESSAGE: return item[1]._is_present_in_parent else: return True
Example 25
Project: auto-alt-text-lambda-api Author: abhisuri97 File: type_checkers.py License: MIT License | 5 votes |
def GetTypeChecker(field): """Returns a type checker for a message field of the specified types. Args: field: FieldDescriptor object for this field. Returns: An instance of TypeChecker which can be used to verify the types of values assigned to a field of the specified type. """ if (field.cpp_type == _FieldDescriptor.CPPTYPE_STRING and field.type == _FieldDescriptor.TYPE_STRING): return UnicodeValueChecker() if field.cpp_type == _FieldDescriptor.CPPTYPE_ENUM: if SupportsOpenEnums(field): # When open enums are supported, any int32 can be assigned. return _VALUE_CHECKERS[_FieldDescriptor.CPPTYPE_INT32] else: return EnumValueChecker(field.enum_type) return _VALUE_CHECKERS[field.cpp_type] # None of the typecheckers below make any attempt to guard against people # subclassing builtin types and doing weird things. We're not trying to # protect against malicious clients here, just people accidentally shooting # themselves in the foot in obvious ways.
Example 26
Project: sklearn-theano Author: sklearn-theano File: descriptor_pool.py License: BSD 3-Clause "New" or "Revised" License | 5 votes |
def _MakeFieldDescriptor(self, field_proto, message_name, index, is_extension=False): """Creates a field descriptor from a FieldDescriptorProto. For message and enum type fields, this method will do a look up in the pool for the appropriate descriptor for that type. If it is unavailable, it will fall back to the _source function to create it. If this type is still unavailable, construction will fail. Args: field_proto: The proto describing the field. message_name: The name of the containing message. index: Index of the field is_extension: Indication that this field is for an extension. Returns: An initialized FieldDescriptor object """ if message_name: full_name = '.'.join((message_name, field_proto.name)) else: full_name = field_proto.name return descriptor.FieldDescriptor( name=field_proto.name, full_name=full_name, index=index, number=field_proto.number, type=field_proto.type, cpp_type=None, message_type=None, enum_type=None, containing_type=None, label=field_proto.label, has_default_value=False, default_value=None, is_extension=is_extension, extension_scope=None, options=field_proto.options)
Example 27
Project: sklearn-theano Author: sklearn-theano File: reflection_test.py License: BSD 3-Clause "New" or "Revised" License | 5 votes |
def testHandWrittenReflection(self): # Hand written extensions are only supported by the pure-Python # implementation of the API. if api_implementation.Type() != 'python': return FieldDescriptor = descriptor.FieldDescriptor foo_field_descriptor = FieldDescriptor( name='foo_field', full_name='MyProto.foo_field', index=0, number=1, type=FieldDescriptor.TYPE_INT64, cpp_type=FieldDescriptor.CPPTYPE_INT64, label=FieldDescriptor.LABEL_OPTIONAL, default_value=0, containing_type=None, message_type=None, enum_type=None, is_extension=False, extension_scope=None, options=descriptor_pb2.FieldOptions()) mydescriptor = descriptor.Descriptor( name='MyProto', full_name='MyProto', filename='ignored', containing_type=None, nested_types=[], enum_types=[], fields=[foo_field_descriptor], extensions=[], options=descriptor_pb2.MessageOptions()) class MyProtoClass(six.with_metaclass(reflection.GeneratedProtocolMessageType, message.Message)): DESCRIPTOR = mydescriptor myproto_instance = MyProtoClass() self.assertEqual(0, myproto_instance.foo_field) self.assertTrue(not myproto_instance.HasField('foo_field')) myproto_instance.foo_field = 23 self.assertEqual(23, myproto_instance.foo_field) self.assertTrue(myproto_instance.HasField('foo_field'))
Example 28
Project: sklearn-theano Author: sklearn-theano File: reflection_test.py License: BSD 3-Clause "New" or "Revised" License | 5 votes |
def testPackedOptions(self): proto = unittest_pb2.TestAllTypes() proto.optional_int32 = 1 proto.optional_double = 3.0 for field_descriptor, _ in proto.ListFields(): self.assertEqual(False, field_descriptor.GetOptions().packed) proto = unittest_pb2.TestPackedTypes() proto.packed_int32.append(1) proto.packed_double.append(3.0) for field_descriptor, _ in proto.ListFields(): self.assertEqual(True, field_descriptor.GetOptions().packed) self.assertEqual(descriptor.FieldDescriptor.LABEL_REPEATED, field_descriptor.label)
Example 29
Project: sklearn-theano Author: sklearn-theano File: python_message.py License: BSD 3-Clause "New" or "Revised" License | 5 votes |
def _IsPresent(item): """Given a (FieldDescriptor, value) tuple from _fields, return true if the value should be included in the list returned by ListFields().""" if item[0].label == _FieldDescriptor.LABEL_REPEATED: return bool(item[1]) elif item[0].cpp_type == _FieldDescriptor.CPPTYPE_MESSAGE: return item[1]._is_present_in_parent else: return True
Example 30
Project: sklearn-theano Author: sklearn-theano File: type_checkers.py License: BSD 3-Clause "New" or "Revised" License | 5 votes |
def GetTypeChecker(field): """Returns a type checker for a message field of the specified types. Args: field: FieldDescriptor object for this field. Returns: An instance of TypeChecker which can be used to verify the types of values assigned to a field of the specified type. """ if (field.cpp_type == _FieldDescriptor.CPPTYPE_STRING and field.type == _FieldDescriptor.TYPE_STRING): return UnicodeValueChecker() if field.cpp_type == _FieldDescriptor.CPPTYPE_ENUM: if SupportsOpenEnums(field): # When open enums are supported, any int32 can be assigned. return _VALUE_CHECKERS[_FieldDescriptor.CPPTYPE_INT32] else: return EnumValueChecker(field.enum_type) return _VALUE_CHECKERS[field.cpp_type] # None of the typecheckers below make any attempt to guard against people # subclassing builtin types and doing weird things. We're not trying to # protect against malicious clients here, just people accidentally shooting # themselves in the foot in obvious ways.