Renamed google.protobuf to protobuf26

third_party/google/protobuf/descriptor_database.py

-# Protocol Buffers - Google's data interchange format
-# Copyright 2008 Google Inc.  All rights reserved.
-# http://code.google.com/p/protobuf/
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Provides a container for DescriptorProtos."""
-
-__author__ = 'matthewtoia@google.com (Matt Toia)'
-
-
-class Error(Exception):
-  pass
-
-
-class DescriptorDatabaseConflictingDefinitionError(Error):
-  """Raised when a proto is added with the same name & different descriptor."""
-
-
-class DescriptorDatabase(object):
-  """A container accepting FileDescriptorProtos and maps DescriptorProtos."""
-
-  def __init__(self):
-    self._file_desc_protos_by_file = {}
-    self._file_desc_protos_by_symbol = {}
-
-  def Add(self, file_desc_proto):
-    """Adds the FileDescriptorProto and its types to this database.
-
-    Args:
-      file_desc_proto: The FileDescriptorProto to add.
-    Raises:
-      DescriptorDatabaseException: if an attempt is made to add a proto
-        with the same name but different definition than an exisiting
-        proto in the database.
-    """
-    proto_name = file_desc_proto.name
-    if proto_name not in self._file_desc_protos_by_file:
-      self._file_desc_protos_by_file[proto_name] = file_desc_proto
-    elif self._file_desc_protos_by_file[proto_name] != file_desc_proto:
-      raise DescriptorDatabaseConflictingDefinitionError(
-          '%s already added, but with different descriptor.' % proto_name)
-
-    package = file_desc_proto.package
-    for message in file_desc_proto.message_type:
-      self._file_desc_protos_by_symbol.update(
-          (name, file_desc_proto) for name in _ExtractSymbols(message, package))
-    for enum in file_desc_proto.enum_type:
-      self._file_desc_protos_by_symbol[
-          '.'.join((package, enum.name))] = file_desc_proto
-
-  def FindFileByName(self, name):
-    """Finds the file descriptor proto by file name.
-
-    Typically the file name is a relative path ending to a .proto file. The
-    proto with the given name will have to have been added to this database
-    using the Add method or else an error will be raised.
-
-    Args:
-      name: The file name to find.
-
-    Returns:
-      The file descriptor proto matching the name.
-
-    Raises:
-      KeyError if no file by the given name was added.
-    """
-
-    return self._file_desc_protos_by_file[name]
-
-  def FindFileContainingSymbol(self, symbol):
-    """Finds the file descriptor proto containing the specified symbol.
-
-    The symbol should be a fully qualified name including the file descriptor's
-    package and any containing messages. Some examples:
-
-    'some.package.name.Message'
-    'some.package.name.Message.NestedEnum'
-
-    The file descriptor proto containing the specified symbol must be added to
-    this database using the Add method or else an error will be raised.
-
-    Args:
-      symbol: The fully qualified symbol name.
-
-    Returns:
-      The file descriptor proto containing the symbol.
-
-    Raises:
-      KeyError if no file contains the specified symbol.
-    """
-
-    return self._file_desc_protos_by_symbol[symbol]
-
-
-def _ExtractSymbols(desc_proto, package):
-  """Pulls out all the symbols from a descriptor proto.
-
-  Args:
-    desc_proto: The proto to extract symbols from.
-    package: The package containing the descriptor type.
-
-  Yields:
-    The fully qualified name found in the descriptor.
-  """
-
-  message_name = '.'.join((package, desc_proto.name))
-  yield message_name
-  for nested_type in desc_proto.nested_type:
-    for symbol in _ExtractSymbols(nested_type, message_name):
-      yield symbol
-    for enum_type in desc_proto.enum_type:
-      yield '.'.join((message_name, enum_type.name))