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1142 lines
43 KiB
Python
1142 lines
43 KiB
Python
# 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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"""Descriptors essentially contain exactly the information found in a .proto
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file, in types that make this information accessible in Python.
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"""
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__author__ = 'robinson@google.com (Will Robinson)'
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import threading
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import warnings
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import six
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from google.protobuf.internal import api_implementation
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_USE_C_DESCRIPTORS = False
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if api_implementation.Type() == 'cpp':
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# Used by MakeDescriptor in cpp mode
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import binascii
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import os
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from google.protobuf.pyext import _message
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_USE_C_DESCRIPTORS = True
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class Error(Exception):
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"""Base error for this module."""
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class TypeTransformationError(Error):
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"""Error transforming between python proto type and corresponding C++ type."""
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if _USE_C_DESCRIPTORS:
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# This metaclass allows to override the behavior of code like
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# isinstance(my_descriptor, FieldDescriptor)
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# and make it return True when the descriptor is an instance of the extension
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# type written in C++.
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class DescriptorMetaclass(type):
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def __instancecheck__(cls, obj):
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if super(DescriptorMetaclass, cls).__instancecheck__(obj):
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return True
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if isinstance(obj, cls._C_DESCRIPTOR_CLASS):
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return True
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return False
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else:
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# The standard metaclass; nothing changes.
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DescriptorMetaclass = type
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class _Lock(object):
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"""Wrapper class of threading.Lock(), which is allowed by 'with'."""
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def __new__(cls):
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self = object.__new__(cls)
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self._lock = threading.Lock() # pylint: disable=protected-access
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return self
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def __enter__(self):
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self._lock.acquire()
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def __exit__(self, exc_type, exc_value, exc_tb):
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self._lock.release()
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_lock = threading.Lock()
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def _Deprecated(name):
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if _Deprecated.count > 0:
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_Deprecated.count -= 1
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warnings.warn(
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'Call to deprecated create function %s(). Note: Create unlinked '
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'descriptors is going to go away. Please use get/find descriptors from '
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'generated code or query the descriptor_pool.'
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% name,
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category=DeprecationWarning, stacklevel=3)
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# Deprecated warnings will print 100 times at most which should be enough for
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# users to notice and do not cause timeout.
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_Deprecated.count = 100
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_internal_create_key = object()
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class DescriptorBase(six.with_metaclass(DescriptorMetaclass)):
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"""Descriptors base class.
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This class is the base of all descriptor classes. It provides common options
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related functionality.
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Attributes:
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has_options: True if the descriptor has non-default options. Usually it
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is not necessary to read this -- just call GetOptions() which will
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happily return the default instance. However, it's sometimes useful
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for efficiency, and also useful inside the protobuf implementation to
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avoid some bootstrapping issues.
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"""
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if _USE_C_DESCRIPTORS:
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# The class, or tuple of classes, that are considered as "virtual
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# subclasses" of this descriptor class.
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_C_DESCRIPTOR_CLASS = ()
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def __init__(self, options, serialized_options, options_class_name):
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"""Initialize the descriptor given its options message and the name of the
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class of the options message. The name of the class is required in case
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the options message is None and has to be created.
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"""
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self._options = options
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self._options_class_name = options_class_name
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self._serialized_options = serialized_options
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# Does this descriptor have non-default options?
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self.has_options = (options is not None) or (serialized_options is not None)
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def _SetOptions(self, options, options_class_name):
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"""Sets the descriptor's options
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This function is used in generated proto2 files to update descriptor
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options. It must not be used outside proto2.
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"""
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self._options = options
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self._options_class_name = options_class_name
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# Does this descriptor have non-default options?
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self.has_options = options is not None
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def GetOptions(self):
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"""Retrieves descriptor options.
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This method returns the options set or creates the default options for the
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descriptor.
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"""
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if self._options:
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return self._options
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from google.protobuf import descriptor_pb2
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try:
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options_class = getattr(descriptor_pb2,
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self._options_class_name)
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except AttributeError:
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raise RuntimeError('Unknown options class name %s!' %
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(self._options_class_name))
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with _lock:
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if self._serialized_options is None:
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self._options = options_class()
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else:
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self._options = _ParseOptions(options_class(),
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self._serialized_options)
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return self._options
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class _NestedDescriptorBase(DescriptorBase):
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"""Common class for descriptors that can be nested."""
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def __init__(self, options, options_class_name, name, full_name,
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file, containing_type, serialized_start=None,
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serialized_end=None, serialized_options=None):
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"""Constructor.
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Args:
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options: Protocol message options or None
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to use default message options.
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options_class_name (str): The class name of the above options.
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name (str): Name of this protocol message type.
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full_name (str): Fully-qualified name of this protocol message type,
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which will include protocol "package" name and the name of any
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enclosing types.
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file (FileDescriptor): Reference to file info.
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containing_type: if provided, this is a nested descriptor, with this
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descriptor as parent, otherwise None.
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serialized_start: The start index (inclusive) in block in the
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file.serialized_pb that describes this descriptor.
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serialized_end: The end index (exclusive) in block in the
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file.serialized_pb that describes this descriptor.
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serialized_options: Protocol message serialized options or None.
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"""
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super(_NestedDescriptorBase, self).__init__(
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options, serialized_options, options_class_name)
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self.name = name
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# TODO(falk): Add function to calculate full_name instead of having it in
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# memory?
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self.full_name = full_name
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self.file = file
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self.containing_type = containing_type
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self._serialized_start = serialized_start
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self._serialized_end = serialized_end
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def CopyToProto(self, proto):
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"""Copies this to the matching proto in descriptor_pb2.
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Args:
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proto: An empty proto instance from descriptor_pb2.
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Raises:
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Error: If self couldnt be serialized, due to to few constructor arguments.
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"""
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if (self.file is not None and
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self._serialized_start is not None and
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self._serialized_end is not None):
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proto.ParseFromString(self.file.serialized_pb[
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self._serialized_start:self._serialized_end])
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else:
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raise Error('Descriptor does not contain serialization.')
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class Descriptor(_NestedDescriptorBase):
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"""Descriptor for a protocol message type.
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Attributes:
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name (str): Name of this protocol message type.
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full_name (str): Fully-qualified name of this protocol message type,
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which will include protocol "package" name and the name of any
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enclosing types.
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containing_type (Descriptor): Reference to the descriptor of the type
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containing us, or None if this is top-level.
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fields (list[FieldDescriptor]): Field descriptors for all fields in
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this type.
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fields_by_number (dict(int, FieldDescriptor)): Same
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:class:`FieldDescriptor` objects as in :attr:`fields`, but indexed
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by "number" attribute in each FieldDescriptor.
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fields_by_name (dict(str, FieldDescriptor)): Same
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:class:`FieldDescriptor` objects as in :attr:`fields`, but indexed by
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"name" attribute in each :class:`FieldDescriptor`.
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nested_types (list[Descriptor]): Descriptor references
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for all protocol message types nested within this one.
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nested_types_by_name (dict(str, Descriptor)): Same Descriptor
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objects as in :attr:`nested_types`, but indexed by "name" attribute
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in each Descriptor.
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enum_types (list[EnumDescriptor]): :class:`EnumDescriptor` references
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for all enums contained within this type.
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enum_types_by_name (dict(str, EnumDescriptor)): Same
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:class:`EnumDescriptor` objects as in :attr:`enum_types`, but
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indexed by "name" attribute in each EnumDescriptor.
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enum_values_by_name (dict(str, EnumValueDescriptor)): Dict mapping
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from enum value name to :class:`EnumValueDescriptor` for that value.
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extensions (list[FieldDescriptor]): All extensions defined directly
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within this message type (NOT within a nested type).
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extensions_by_name (dict(str, FieldDescriptor)): Same FieldDescriptor
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objects as :attr:`extensions`, but indexed by "name" attribute of each
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FieldDescriptor.
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is_extendable (bool): Does this type define any extension ranges?
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oneofs (list[OneofDescriptor]): The list of descriptors for oneof fields
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in this message.
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oneofs_by_name (dict(str, OneofDescriptor)): Same objects as in
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:attr:`oneofs`, but indexed by "name" attribute.
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file (FileDescriptor): Reference to file descriptor.
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"""
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if _USE_C_DESCRIPTORS:
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_C_DESCRIPTOR_CLASS = _message.Descriptor
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def __new__(cls, name, full_name, filename, containing_type, fields,
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nested_types, enum_types, extensions, options=None,
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serialized_options=None,
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is_extendable=True, extension_ranges=None, oneofs=None,
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file=None, serialized_start=None, serialized_end=None, # pylint: disable=redefined-builtin
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syntax=None, create_key=None):
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_message.Message._CheckCalledFromGeneratedFile()
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return _message.default_pool.FindMessageTypeByName(full_name)
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# NOTE(tmarek): The file argument redefining a builtin is nothing we can
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# fix right now since we don't know how many clients already rely on the
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# name of the argument.
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def __init__(self, name, full_name, filename, containing_type, fields,
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nested_types, enum_types, extensions, options=None,
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serialized_options=None,
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is_extendable=True, extension_ranges=None, oneofs=None,
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file=None, serialized_start=None, serialized_end=None, # pylint: disable=redefined-builtin
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syntax=None, create_key=None):
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"""Arguments to __init__() are as described in the description
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of Descriptor fields above.
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Note that filename is an obsolete argument, that is not used anymore.
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Please use file.name to access this as an attribute.
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"""
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if create_key is not _internal_create_key:
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_Deprecated('Descriptor')
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super(Descriptor, self).__init__(
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options, 'MessageOptions', name, full_name, file,
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containing_type, serialized_start=serialized_start,
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serialized_end=serialized_end, serialized_options=serialized_options)
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# We have fields in addition to fields_by_name and fields_by_number,
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# so that:
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# 1. Clients can index fields by "order in which they're listed."
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# 2. Clients can easily iterate over all fields with the terse
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# syntax: for f in descriptor.fields: ...
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self.fields = fields
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for field in self.fields:
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field.containing_type = self
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self.fields_by_number = dict((f.number, f) for f in fields)
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self.fields_by_name = dict((f.name, f) for f in fields)
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self._fields_by_camelcase_name = None
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self.nested_types = nested_types
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for nested_type in nested_types:
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nested_type.containing_type = self
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self.nested_types_by_name = dict((t.name, t) for t in nested_types)
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self.enum_types = enum_types
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for enum_type in self.enum_types:
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enum_type.containing_type = self
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self.enum_types_by_name = dict((t.name, t) for t in enum_types)
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self.enum_values_by_name = dict(
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(v.name, v) for t in enum_types for v in t.values)
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self.extensions = extensions
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for extension in self.extensions:
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extension.extension_scope = self
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self.extensions_by_name = dict((f.name, f) for f in extensions)
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self.is_extendable = is_extendable
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self.extension_ranges = extension_ranges
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self.oneofs = oneofs if oneofs is not None else []
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self.oneofs_by_name = dict((o.name, o) for o in self.oneofs)
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for oneof in self.oneofs:
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oneof.containing_type = self
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self.syntax = syntax or "proto2"
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@property
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def fields_by_camelcase_name(self):
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"""Same FieldDescriptor objects as in :attr:`fields`, but indexed by
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:attr:`FieldDescriptor.camelcase_name`.
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"""
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if self._fields_by_camelcase_name is None:
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self._fields_by_camelcase_name = dict(
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(f.camelcase_name, f) for f in self.fields)
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return self._fields_by_camelcase_name
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def EnumValueName(self, enum, value):
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"""Returns the string name of an enum value.
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This is just a small helper method to simplify a common operation.
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Args:
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enum: string name of the Enum.
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value: int, value of the enum.
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Returns:
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string name of the enum value.
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Raises:
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KeyError if either the Enum doesn't exist or the value is not a valid
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value for the enum.
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"""
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return self.enum_types_by_name[enum].values_by_number[value].name
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def CopyToProto(self, proto):
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"""Copies this to a descriptor_pb2.DescriptorProto.
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Args:
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proto: An empty descriptor_pb2.DescriptorProto.
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"""
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# This function is overridden to give a better doc comment.
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super(Descriptor, self).CopyToProto(proto)
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|
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# TODO(robinson): We should have aggressive checking here,
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# for example:
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# * If you specify a repeated field, you should not be allowed
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# to specify a default value.
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# * [Other examples here as needed].
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#
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# TODO(robinson): for this and other *Descriptor classes, we
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# might also want to lock things down aggressively (e.g.,
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# prevent clients from setting the attributes). Having
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# stronger invariants here in general will reduce the number
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# of runtime checks we must do in reflection.py...
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class FieldDescriptor(DescriptorBase):
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"""Descriptor for a single field in a .proto file.
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Attributes:
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name (str): Name of this field, exactly as it appears in .proto.
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full_name (str): Name of this field, including containing scope. This is
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particularly relevant for extensions.
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index (int): Dense, 0-indexed index giving the order that this
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field textually appears within its message in the .proto file.
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number (int): Tag number declared for this field in the .proto file.
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type (int): (One of the TYPE_* constants below) Declared type.
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cpp_type (int): (One of the CPPTYPE_* constants below) C++ type used to
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represent this field.
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label (int): (One of the LABEL_* constants below) Tells whether this
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field is optional, required, or repeated.
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has_default_value (bool): True if this field has a default value defined,
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otherwise false.
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default_value (Varies): Default value of this field. Only
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meaningful for non-repeated scalar fields. Repeated fields
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should always set this to [], and non-repeated composite
|
|
fields should always set this to None.
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containing_type (Descriptor): Descriptor of the protocol message
|
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type that contains this field. Set by the Descriptor constructor
|
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if we're passed into one.
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Somewhat confusingly, for extension fields, this is the
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descriptor of the EXTENDED message, not the descriptor
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of the message containing this field. (See is_extension and
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extension_scope below).
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message_type (Descriptor): If a composite field, a descriptor
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of the message type contained in this field. Otherwise, this is None.
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enum_type (EnumDescriptor): If this field contains an enum, a
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descriptor of that enum. Otherwise, this is None.
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is_extension: True iff this describes an extension field.
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extension_scope (Descriptor): Only meaningful if is_extension is True.
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Gives the message that immediately contains this extension field.
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Will be None iff we're a top-level (file-level) extension field.
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options (descriptor_pb2.FieldOptions): Protocol message field options or
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None to use default field options.
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containing_oneof (OneofDescriptor): If the field is a member of a oneof
|
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union, contains its descriptor. Otherwise, None.
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file (FileDescriptor): Reference to file descriptor.
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|
"""
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|
# Must be consistent with C++ FieldDescriptor::Type enum in
|
|
# descriptor.h.
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|
#
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|
# TODO(robinson): Find a way to eliminate this repetition.
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|
TYPE_DOUBLE = 1
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TYPE_FLOAT = 2
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TYPE_INT64 = 3
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|
TYPE_UINT64 = 4
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TYPE_INT32 = 5
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TYPE_FIXED64 = 6
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TYPE_FIXED32 = 7
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TYPE_BOOL = 8
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TYPE_STRING = 9
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TYPE_GROUP = 10
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TYPE_MESSAGE = 11
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TYPE_BYTES = 12
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TYPE_UINT32 = 13
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TYPE_ENUM = 14
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TYPE_SFIXED32 = 15
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TYPE_SFIXED64 = 16
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TYPE_SINT32 = 17
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TYPE_SINT64 = 18
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MAX_TYPE = 18
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|
|
# Must be consistent with C++ FieldDescriptor::CppType enum in
|
|
# descriptor.h.
|
|
#
|
|
# TODO(robinson): Find a way to eliminate this repetition.
|
|
CPPTYPE_INT32 = 1
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CPPTYPE_INT64 = 2
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CPPTYPE_UINT32 = 3
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CPPTYPE_UINT64 = 4
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CPPTYPE_DOUBLE = 5
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CPPTYPE_FLOAT = 6
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CPPTYPE_BOOL = 7
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CPPTYPE_ENUM = 8
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CPPTYPE_STRING = 9
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CPPTYPE_MESSAGE = 10
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MAX_CPPTYPE = 10
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|
|
_PYTHON_TO_CPP_PROTO_TYPE_MAP = {
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TYPE_DOUBLE: CPPTYPE_DOUBLE,
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TYPE_FLOAT: CPPTYPE_FLOAT,
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|
TYPE_ENUM: CPPTYPE_ENUM,
|
|
TYPE_INT64: CPPTYPE_INT64,
|
|
TYPE_SINT64: CPPTYPE_INT64,
|
|
TYPE_SFIXED64: CPPTYPE_INT64,
|
|
TYPE_UINT64: CPPTYPE_UINT64,
|
|
TYPE_FIXED64: CPPTYPE_UINT64,
|
|
TYPE_INT32: CPPTYPE_INT32,
|
|
TYPE_SFIXED32: CPPTYPE_INT32,
|
|
TYPE_SINT32: CPPTYPE_INT32,
|
|
TYPE_UINT32: CPPTYPE_UINT32,
|
|
TYPE_FIXED32: CPPTYPE_UINT32,
|
|
TYPE_BYTES: CPPTYPE_STRING,
|
|
TYPE_STRING: CPPTYPE_STRING,
|
|
TYPE_BOOL: CPPTYPE_BOOL,
|
|
TYPE_MESSAGE: CPPTYPE_MESSAGE,
|
|
TYPE_GROUP: CPPTYPE_MESSAGE
|
|
}
|
|
|
|
# Must be consistent with C++ FieldDescriptor::Label enum in
|
|
# descriptor.h.
|
|
#
|
|
# TODO(robinson): Find a way to eliminate this repetition.
|
|
LABEL_OPTIONAL = 1
|
|
LABEL_REQUIRED = 2
|
|
LABEL_REPEATED = 3
|
|
MAX_LABEL = 3
|
|
|
|
# Must be consistent with C++ constants kMaxNumber, kFirstReservedNumber,
|
|
# and kLastReservedNumber in descriptor.h
|
|
MAX_FIELD_NUMBER = (1 << 29) - 1
|
|
FIRST_RESERVED_FIELD_NUMBER = 19000
|
|
LAST_RESERVED_FIELD_NUMBER = 19999
|
|
|
|
if _USE_C_DESCRIPTORS:
|
|
_C_DESCRIPTOR_CLASS = _message.FieldDescriptor
|
|
|
|
def __new__(cls, name, full_name, index, number, type, cpp_type, label,
|
|
default_value, message_type, enum_type, containing_type,
|
|
is_extension, extension_scope, options=None,
|
|
serialized_options=None,
|
|
has_default_value=True, containing_oneof=None, json_name=None,
|
|
file=None, create_key=None): # pylint: disable=redefined-builtin
|
|
_message.Message._CheckCalledFromGeneratedFile()
|
|
if is_extension:
|
|
return _message.default_pool.FindExtensionByName(full_name)
|
|
else:
|
|
return _message.default_pool.FindFieldByName(full_name)
|
|
|
|
def __init__(self, name, full_name, index, number, type, cpp_type, label,
|
|
default_value, message_type, enum_type, containing_type,
|
|
is_extension, extension_scope, options=None,
|
|
serialized_options=None,
|
|
has_default_value=True, containing_oneof=None, json_name=None,
|
|
file=None, create_key=None): # pylint: disable=redefined-builtin
|
|
"""The arguments are as described in the description of FieldDescriptor
|
|
attributes above.
|
|
|
|
Note that containing_type may be None, and may be set later if necessary
|
|
(to deal with circular references between message types, for example).
|
|
Likewise for extension_scope.
|
|
"""
|
|
if create_key is not _internal_create_key:
|
|
_Deprecated('FieldDescriptor')
|
|
|
|
super(FieldDescriptor, self).__init__(
|
|
options, serialized_options, 'FieldOptions')
|
|
self.name = name
|
|
self.full_name = full_name
|
|
self.file = file
|
|
self._camelcase_name = None
|
|
if json_name is None:
|
|
self.json_name = _ToJsonName(name)
|
|
else:
|
|
self.json_name = json_name
|
|
self.index = index
|
|
self.number = number
|
|
self.type = type
|
|
self.cpp_type = cpp_type
|
|
self.label = label
|
|
self.has_default_value = has_default_value
|
|
self.default_value = default_value
|
|
self.containing_type = containing_type
|
|
self.message_type = message_type
|
|
self.enum_type = enum_type
|
|
self.is_extension = is_extension
|
|
self.extension_scope = extension_scope
|
|
self.containing_oneof = containing_oneof
|
|
if api_implementation.Type() == 'cpp':
|
|
if is_extension:
|
|
self._cdescriptor = _message.default_pool.FindExtensionByName(full_name)
|
|
else:
|
|
self._cdescriptor = _message.default_pool.FindFieldByName(full_name)
|
|
else:
|
|
self._cdescriptor = None
|
|
|
|
@property
|
|
def camelcase_name(self):
|
|
"""Camelcase name of this field.
|
|
|
|
Returns:
|
|
str: the name in CamelCase.
|
|
"""
|
|
if self._camelcase_name is None:
|
|
self._camelcase_name = _ToCamelCase(self.name)
|
|
return self._camelcase_name
|
|
|
|
@staticmethod
|
|
def ProtoTypeToCppProtoType(proto_type):
|
|
"""Converts from a Python proto type to a C++ Proto Type.
|
|
|
|
The Python ProtocolBuffer classes specify both the 'Python' datatype and the
|
|
'C++' datatype - and they're not the same. This helper method should
|
|
translate from one to another.
|
|
|
|
Args:
|
|
proto_type: the Python proto type (descriptor.FieldDescriptor.TYPE_*)
|
|
Returns:
|
|
int: descriptor.FieldDescriptor.CPPTYPE_*, the C++ type.
|
|
Raises:
|
|
TypeTransformationError: when the Python proto type isn't known.
|
|
"""
|
|
try:
|
|
return FieldDescriptor._PYTHON_TO_CPP_PROTO_TYPE_MAP[proto_type]
|
|
except KeyError:
|
|
raise TypeTransformationError('Unknown proto_type: %s' % proto_type)
|
|
|
|
|
|
class EnumDescriptor(_NestedDescriptorBase):
|
|
|
|
"""Descriptor for an enum defined in a .proto file.
|
|
|
|
Attributes:
|
|
name (str): Name of the enum type.
|
|
full_name (str): Full name of the type, including package name
|
|
and any enclosing type(s).
|
|
|
|
values (list[EnumValueDescriptors]): List of the values
|
|
in this enum.
|
|
values_by_name (dict(str, EnumValueDescriptor)): Same as :attr:`values`,
|
|
but indexed by the "name" field of each EnumValueDescriptor.
|
|
values_by_number (dict(int, EnumValueDescriptor)): Same as :attr:`values`,
|
|
but indexed by the "number" field of each EnumValueDescriptor.
|
|
containing_type (Descriptor): Descriptor of the immediate containing
|
|
type of this enum, or None if this is an enum defined at the
|
|
top level in a .proto file. Set by Descriptor's constructor
|
|
if we're passed into one.
|
|
file (FileDescriptor): Reference to file descriptor.
|
|
options (descriptor_pb2.EnumOptions): Enum options message or
|
|
None to use default enum options.
|
|
"""
|
|
|
|
if _USE_C_DESCRIPTORS:
|
|
_C_DESCRIPTOR_CLASS = _message.EnumDescriptor
|
|
|
|
def __new__(cls, name, full_name, filename, values,
|
|
containing_type=None, options=None,
|
|
serialized_options=None, file=None, # pylint: disable=redefined-builtin
|
|
serialized_start=None, serialized_end=None, create_key=None):
|
|
_message.Message._CheckCalledFromGeneratedFile()
|
|
return _message.default_pool.FindEnumTypeByName(full_name)
|
|
|
|
def __init__(self, name, full_name, filename, values,
|
|
containing_type=None, options=None,
|
|
serialized_options=None, file=None, # pylint: disable=redefined-builtin
|
|
serialized_start=None, serialized_end=None, create_key=None):
|
|
"""Arguments are as described in the attribute description above.
|
|
|
|
Note that filename is an obsolete argument, that is not used anymore.
|
|
Please use file.name to access this as an attribute.
|
|
"""
|
|
if create_key is not _internal_create_key:
|
|
_Deprecated('EnumDescriptor')
|
|
|
|
super(EnumDescriptor, self).__init__(
|
|
options, 'EnumOptions', name, full_name, file,
|
|
containing_type, serialized_start=serialized_start,
|
|
serialized_end=serialized_end, serialized_options=serialized_options)
|
|
|
|
self.values = values
|
|
for value in self.values:
|
|
value.type = self
|
|
self.values_by_name = dict((v.name, v) for v in values)
|
|
# Values are reversed to ensure that the first alias is retained.
|
|
self.values_by_number = dict((v.number, v) for v in reversed(values))
|
|
|
|
def CopyToProto(self, proto):
|
|
"""Copies this to a descriptor_pb2.EnumDescriptorProto.
|
|
|
|
Args:
|
|
proto (descriptor_pb2.EnumDescriptorProto): An empty descriptor proto.
|
|
"""
|
|
# This function is overridden to give a better doc comment.
|
|
super(EnumDescriptor, self).CopyToProto(proto)
|
|
|
|
|
|
class EnumValueDescriptor(DescriptorBase):
|
|
|
|
"""Descriptor for a single value within an enum.
|
|
|
|
Attributes:
|
|
name (str): Name of this value.
|
|
index (int): Dense, 0-indexed index giving the order that this
|
|
value appears textually within its enum in the .proto file.
|
|
number (int): Actual number assigned to this enum value.
|
|
type (EnumDescriptor): :class:`EnumDescriptor` to which this value
|
|
belongs. Set by :class:`EnumDescriptor`'s constructor if we're
|
|
passed into one.
|
|
options (descriptor_pb2.EnumValueOptions): Enum value options message or
|
|
None to use default enum value options options.
|
|
"""
|
|
|
|
if _USE_C_DESCRIPTORS:
|
|
_C_DESCRIPTOR_CLASS = _message.EnumValueDescriptor
|
|
|
|
def __new__(cls, name, index, number,
|
|
type=None, # pylint: disable=redefined-builtin
|
|
options=None, serialized_options=None, create_key=None):
|
|
_message.Message._CheckCalledFromGeneratedFile()
|
|
# There is no way we can build a complete EnumValueDescriptor with the
|
|
# given parameters (the name of the Enum is not known, for example).
|
|
# Fortunately generated files just pass it to the EnumDescriptor()
|
|
# constructor, which will ignore it, so returning None is good enough.
|
|
return None
|
|
|
|
def __init__(self, name, index, number,
|
|
type=None, # pylint: disable=redefined-builtin
|
|
options=None, serialized_options=None, create_key=None):
|
|
"""Arguments are as described in the attribute description above."""
|
|
if create_key is not _internal_create_key:
|
|
_Deprecated('EnumValueDescriptor')
|
|
|
|
super(EnumValueDescriptor, self).__init__(
|
|
options, serialized_options, 'EnumValueOptions')
|
|
self.name = name
|
|
self.index = index
|
|
self.number = number
|
|
self.type = type
|
|
|
|
|
|
class OneofDescriptor(DescriptorBase):
|
|
"""Descriptor for a oneof field.
|
|
|
|
Attributes:
|
|
name (str): Name of the oneof field.
|
|
full_name (str): Full name of the oneof field, including package name.
|
|
index (int): 0-based index giving the order of the oneof field inside
|
|
its containing type.
|
|
containing_type (Descriptor): :class:`Descriptor` of the protocol message
|
|
type that contains this field. Set by the :class:`Descriptor` constructor
|
|
if we're passed into one.
|
|
fields (list[FieldDescriptor]): The list of field descriptors this
|
|
oneof can contain.
|
|
"""
|
|
|
|
if _USE_C_DESCRIPTORS:
|
|
_C_DESCRIPTOR_CLASS = _message.OneofDescriptor
|
|
|
|
def __new__(
|
|
cls, name, full_name, index, containing_type, fields, options=None,
|
|
serialized_options=None, create_key=None):
|
|
_message.Message._CheckCalledFromGeneratedFile()
|
|
return _message.default_pool.FindOneofByName(full_name)
|
|
|
|
def __init__(
|
|
self, name, full_name, index, containing_type, fields, options=None,
|
|
serialized_options=None, create_key=None):
|
|
"""Arguments are as described in the attribute description above."""
|
|
if create_key is not _internal_create_key:
|
|
_Deprecated('OneofDescriptor')
|
|
|
|
super(OneofDescriptor, self).__init__(
|
|
options, serialized_options, 'OneofOptions')
|
|
self.name = name
|
|
self.full_name = full_name
|
|
self.index = index
|
|
self.containing_type = containing_type
|
|
self.fields = fields
|
|
|
|
|
|
class ServiceDescriptor(_NestedDescriptorBase):
|
|
|
|
"""Descriptor for a service.
|
|
|
|
Attributes:
|
|
name (str): Name of the service.
|
|
full_name (str): Full name of the service, including package name.
|
|
index (int): 0-indexed index giving the order that this services
|
|
definition appears within the .proto file.
|
|
methods (list[MethodDescriptor]): List of methods provided by this
|
|
service.
|
|
methods_by_name (dict(str, MethodDescriptor)): Same
|
|
:class:`MethodDescriptor` objects as in :attr:`methods_by_name`, but
|
|
indexed by "name" attribute in each :class:`MethodDescriptor`.
|
|
options (descriptor_pb2.ServiceOptions): Service options message or
|
|
None to use default service options.
|
|
file (FileDescriptor): Reference to file info.
|
|
"""
|
|
|
|
if _USE_C_DESCRIPTORS:
|
|
_C_DESCRIPTOR_CLASS = _message.ServiceDescriptor
|
|
|
|
def __new__(cls, name, full_name, index, methods, options=None,
|
|
serialized_options=None, file=None, # pylint: disable=redefined-builtin
|
|
serialized_start=None, serialized_end=None, create_key=None):
|
|
_message.Message._CheckCalledFromGeneratedFile() # pylint: disable=protected-access
|
|
return _message.default_pool.FindServiceByName(full_name)
|
|
|
|
def __init__(self, name, full_name, index, methods, options=None,
|
|
serialized_options=None, file=None, # pylint: disable=redefined-builtin
|
|
serialized_start=None, serialized_end=None, create_key=None):
|
|
if create_key is not _internal_create_key:
|
|
_Deprecated('ServiceDescriptor')
|
|
|
|
super(ServiceDescriptor, self).__init__(
|
|
options, 'ServiceOptions', name, full_name, file,
|
|
None, serialized_start=serialized_start,
|
|
serialized_end=serialized_end, serialized_options=serialized_options)
|
|
self.index = index
|
|
self.methods = methods
|
|
self.methods_by_name = dict((m.name, m) for m in methods)
|
|
# Set the containing service for each method in this service.
|
|
for method in self.methods:
|
|
method.containing_service = self
|
|
|
|
def FindMethodByName(self, name):
|
|
"""Searches for the specified method, and returns its descriptor.
|
|
|
|
Args:
|
|
name (str): Name of the method.
|
|
Returns:
|
|
MethodDescriptor or None: the desctiptor for the requested method, if
|
|
found.
|
|
"""
|
|
return self.methods_by_name.get(name, None)
|
|
|
|
def CopyToProto(self, proto):
|
|
"""Copies this to a descriptor_pb2.ServiceDescriptorProto.
|
|
|
|
Args:
|
|
proto (descriptor_pb2.ServiceDescriptorProto): An empty descriptor proto.
|
|
"""
|
|
# This function is overridden to give a better doc comment.
|
|
super(ServiceDescriptor, self).CopyToProto(proto)
|
|
|
|
|
|
class MethodDescriptor(DescriptorBase):
|
|
|
|
"""Descriptor for a method in a service.
|
|
|
|
Attributes:
|
|
name (str): Name of the method within the service.
|
|
full_name (str): Full name of method.
|
|
index (int): 0-indexed index of the method inside the service.
|
|
containing_service (ServiceDescriptor): The service that contains this
|
|
method.
|
|
input_type (Descriptor): The descriptor of the message that this method
|
|
accepts.
|
|
output_type (Descriptor): The descriptor of the message that this method
|
|
returns.
|
|
options (descriptor_pb2.MethodOptions or None): Method options message, or
|
|
None to use default method options.
|
|
"""
|
|
|
|
if _USE_C_DESCRIPTORS:
|
|
_C_DESCRIPTOR_CLASS = _message.MethodDescriptor
|
|
|
|
def __new__(cls, name, full_name, index, containing_service,
|
|
input_type, output_type, options=None, serialized_options=None,
|
|
create_key=None):
|
|
_message.Message._CheckCalledFromGeneratedFile() # pylint: disable=protected-access
|
|
return _message.default_pool.FindMethodByName(full_name)
|
|
|
|
def __init__(self, name, full_name, index, containing_service,
|
|
input_type, output_type, options=None, serialized_options=None,
|
|
create_key=None):
|
|
"""The arguments are as described in the description of MethodDescriptor
|
|
attributes above.
|
|
|
|
Note that containing_service may be None, and may be set later if necessary.
|
|
"""
|
|
if create_key is not _internal_create_key:
|
|
_Deprecated('MethodDescriptor')
|
|
|
|
super(MethodDescriptor, self).__init__(
|
|
options, serialized_options, 'MethodOptions')
|
|
self.name = name
|
|
self.full_name = full_name
|
|
self.index = index
|
|
self.containing_service = containing_service
|
|
self.input_type = input_type
|
|
self.output_type = output_type
|
|
|
|
|
|
class FileDescriptor(DescriptorBase):
|
|
"""Descriptor for a file. Mimics the descriptor_pb2.FileDescriptorProto.
|
|
|
|
Note that :attr:`enum_types_by_name`, :attr:`extensions_by_name`, and
|
|
:attr:`dependencies` fields are only set by the
|
|
:py:mod:`google.protobuf.message_factory` module, and not by the generated
|
|
proto code.
|
|
|
|
Attributes:
|
|
name (str): Name of file, relative to root of source tree.
|
|
package (str): Name of the package
|
|
syntax (str): string indicating syntax of the file (can be "proto2" or
|
|
"proto3")
|
|
serialized_pb (bytes): Byte string of serialized
|
|
:class:`descriptor_pb2.FileDescriptorProto`.
|
|
dependencies (list[FileDescriptor]): List of other :class:`FileDescriptor`
|
|
objects this :class:`FileDescriptor` depends on.
|
|
public_dependencies (list[FileDescriptor]): A subset of
|
|
:attr:`dependencies`, which were declared as "public".
|
|
message_types_by_name (dict(str, Descriptor)): Mapping from message names
|
|
to their :class:`Desctiptor`.
|
|
enum_types_by_name (dict(str, EnumDescriptor)): Mapping from enum names to
|
|
their :class:`EnumDescriptor`.
|
|
extensions_by_name (dict(str, FieldDescriptor)): Mapping from extension
|
|
names declared at file scope to their :class:`FieldDescriptor`.
|
|
services_by_name (dict(str, ServiceDescriptor)): Mapping from services'
|
|
names to their :class:`ServiceDescriptor`.
|
|
pool (DescriptorPool): The pool this descriptor belongs to. When not
|
|
passed to the constructor, the global default pool is used.
|
|
"""
|
|
|
|
if _USE_C_DESCRIPTORS:
|
|
_C_DESCRIPTOR_CLASS = _message.FileDescriptor
|
|
|
|
def __new__(cls, name, package, options=None,
|
|
serialized_options=None, serialized_pb=None,
|
|
dependencies=None, public_dependencies=None,
|
|
syntax=None, pool=None, create_key=None):
|
|
# FileDescriptor() is called from various places, not only from generated
|
|
# files, to register dynamic proto files and messages.
|
|
# pylint: disable=g-explicit-bool-comparison
|
|
if serialized_pb == b'':
|
|
# Cpp generated code must be linked in if serialized_pb is ''
|
|
try:
|
|
return _message.default_pool.FindFileByName(name)
|
|
except KeyError:
|
|
raise RuntimeError('Please link in cpp generated lib for %s' % (name))
|
|
elif serialized_pb:
|
|
return _message.default_pool.AddSerializedFile(serialized_pb)
|
|
else:
|
|
return super(FileDescriptor, cls).__new__(cls)
|
|
|
|
def __init__(self, name, package, options=None,
|
|
serialized_options=None, serialized_pb=None,
|
|
dependencies=None, public_dependencies=None,
|
|
syntax=None, pool=None, create_key=None):
|
|
"""Constructor."""
|
|
if create_key is not _internal_create_key:
|
|
_Deprecated('FileDescriptor')
|
|
|
|
super(FileDescriptor, self).__init__(
|
|
options, serialized_options, 'FileOptions')
|
|
|
|
if pool is None:
|
|
from google.protobuf import descriptor_pool
|
|
pool = descriptor_pool.Default()
|
|
self.pool = pool
|
|
self.message_types_by_name = {}
|
|
self.name = name
|
|
self.package = package
|
|
self.syntax = syntax or "proto2"
|
|
self.serialized_pb = serialized_pb
|
|
|
|
self.enum_types_by_name = {}
|
|
self.extensions_by_name = {}
|
|
self.services_by_name = {}
|
|
self.dependencies = (dependencies or [])
|
|
self.public_dependencies = (public_dependencies or [])
|
|
|
|
def CopyToProto(self, proto):
|
|
"""Copies this to a descriptor_pb2.FileDescriptorProto.
|
|
|
|
Args:
|
|
proto: An empty descriptor_pb2.FileDescriptorProto.
|
|
"""
|
|
proto.ParseFromString(self.serialized_pb)
|
|
|
|
|
|
def _ParseOptions(message, string):
|
|
"""Parses serialized options.
|
|
|
|
This helper function is used to parse serialized options in generated
|
|
proto2 files. It must not be used outside proto2.
|
|
"""
|
|
message.ParseFromString(string)
|
|
return message
|
|
|
|
|
|
def _ToCamelCase(name):
|
|
"""Converts name to camel-case and returns it."""
|
|
capitalize_next = False
|
|
result = []
|
|
|
|
for c in name:
|
|
if c == '_':
|
|
if result:
|
|
capitalize_next = True
|
|
elif capitalize_next:
|
|
result.append(c.upper())
|
|
capitalize_next = False
|
|
else:
|
|
result += c
|
|
|
|
# Lower-case the first letter.
|
|
if result and result[0].isupper():
|
|
result[0] = result[0].lower()
|
|
return ''.join(result)
|
|
|
|
|
|
def _OptionsOrNone(descriptor_proto):
|
|
"""Returns the value of the field `options`, or None if it is not set."""
|
|
if descriptor_proto.HasField('options'):
|
|
return descriptor_proto.options
|
|
else:
|
|
return None
|
|
|
|
|
|
def _ToJsonName(name):
|
|
"""Converts name to Json name and returns it."""
|
|
capitalize_next = False
|
|
result = []
|
|
|
|
for c in name:
|
|
if c == '_':
|
|
capitalize_next = True
|
|
elif capitalize_next:
|
|
result.append(c.upper())
|
|
capitalize_next = False
|
|
else:
|
|
result += c
|
|
|
|
return ''.join(result)
|
|
|
|
|
|
def MakeDescriptor(desc_proto, package='', build_file_if_cpp=True,
|
|
syntax=None):
|
|
"""Make a protobuf Descriptor given a DescriptorProto protobuf.
|
|
|
|
Handles nested descriptors. Note that this is limited to the scope of defining
|
|
a message inside of another message. Composite fields can currently only be
|
|
resolved if the message is defined in the same scope as the field.
|
|
|
|
Args:
|
|
desc_proto: The descriptor_pb2.DescriptorProto protobuf message.
|
|
package: Optional package name for the new message Descriptor (string).
|
|
build_file_if_cpp: Update the C++ descriptor pool if api matches.
|
|
Set to False on recursion, so no duplicates are created.
|
|
syntax: The syntax/semantics that should be used. Set to "proto3" to get
|
|
proto3 field presence semantics.
|
|
Returns:
|
|
A Descriptor for protobuf messages.
|
|
"""
|
|
if api_implementation.Type() == 'cpp' and build_file_if_cpp:
|
|
# The C++ implementation requires all descriptors to be backed by the same
|
|
# definition in the C++ descriptor pool. To do this, we build a
|
|
# FileDescriptorProto with the same definition as this descriptor and build
|
|
# it into the pool.
|
|
from google.protobuf import descriptor_pb2
|
|
file_descriptor_proto = descriptor_pb2.FileDescriptorProto()
|
|
file_descriptor_proto.message_type.add().MergeFrom(desc_proto)
|
|
|
|
# Generate a random name for this proto file to prevent conflicts with any
|
|
# imported ones. We need to specify a file name so the descriptor pool
|
|
# accepts our FileDescriptorProto, but it is not important what that file
|
|
# name is actually set to.
|
|
proto_name = binascii.hexlify(os.urandom(16)).decode('ascii')
|
|
|
|
if package:
|
|
file_descriptor_proto.name = os.path.join(package.replace('.', '/'),
|
|
proto_name + '.proto')
|
|
file_descriptor_proto.package = package
|
|
else:
|
|
file_descriptor_proto.name = proto_name + '.proto'
|
|
|
|
_message.default_pool.Add(file_descriptor_proto)
|
|
result = _message.default_pool.FindFileByName(file_descriptor_proto.name)
|
|
|
|
if _USE_C_DESCRIPTORS:
|
|
return result.message_types_by_name[desc_proto.name]
|
|
|
|
full_message_name = [desc_proto.name]
|
|
if package: full_message_name.insert(0, package)
|
|
|
|
# Create Descriptors for enum types
|
|
enum_types = {}
|
|
for enum_proto in desc_proto.enum_type:
|
|
full_name = '.'.join(full_message_name + [enum_proto.name])
|
|
enum_desc = EnumDescriptor(
|
|
enum_proto.name, full_name, None, [
|
|
EnumValueDescriptor(enum_val.name, ii, enum_val.number,
|
|
create_key=_internal_create_key)
|
|
for ii, enum_val in enumerate(enum_proto.value)],
|
|
create_key=_internal_create_key)
|
|
enum_types[full_name] = enum_desc
|
|
|
|
# Create Descriptors for nested types
|
|
nested_types = {}
|
|
for nested_proto in desc_proto.nested_type:
|
|
full_name = '.'.join(full_message_name + [nested_proto.name])
|
|
# Nested types are just those defined inside of the message, not all types
|
|
# used by fields in the message, so no loops are possible here.
|
|
nested_desc = MakeDescriptor(nested_proto,
|
|
package='.'.join(full_message_name),
|
|
build_file_if_cpp=False,
|
|
syntax=syntax)
|
|
nested_types[full_name] = nested_desc
|
|
|
|
fields = []
|
|
for field_proto in desc_proto.field:
|
|
full_name = '.'.join(full_message_name + [field_proto.name])
|
|
enum_desc = None
|
|
nested_desc = None
|
|
if field_proto.json_name:
|
|
json_name = field_proto.json_name
|
|
else:
|
|
json_name = None
|
|
if field_proto.HasField('type_name'):
|
|
type_name = field_proto.type_name
|
|
full_type_name = '.'.join(full_message_name +
|
|
[type_name[type_name.rfind('.')+1:]])
|
|
if full_type_name in nested_types:
|
|
nested_desc = nested_types[full_type_name]
|
|
elif full_type_name in enum_types:
|
|
enum_desc = enum_types[full_type_name]
|
|
# Else type_name references a non-local type, which isn't implemented
|
|
field = FieldDescriptor(
|
|
field_proto.name, full_name, field_proto.number - 1,
|
|
field_proto.number, field_proto.type,
|
|
FieldDescriptor.ProtoTypeToCppProtoType(field_proto.type),
|
|
field_proto.label, None, nested_desc, enum_desc, None, False, None,
|
|
options=_OptionsOrNone(field_proto), has_default_value=False,
|
|
json_name=json_name, create_key=_internal_create_key)
|
|
fields.append(field)
|
|
|
|
desc_name = '.'.join(full_message_name)
|
|
return Descriptor(desc_proto.name, desc_name, None, None, fields,
|
|
list(nested_types.values()), list(enum_types.values()), [],
|
|
options=_OptionsOrNone(desc_proto),
|
|
create_key=_internal_create_key)
|