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Diffstat (limited to 'generator/google/protobuf/internal/message_listener.py')
| -rw-r--r-- | generator/google/protobuf/internal/message_listener.py | 78 |
1 files changed, 0 insertions, 78 deletions
diff --git a/generator/google/protobuf/internal/message_listener.py b/generator/google/protobuf/internal/message_listener.py deleted file mode 100644 index 0fc255a..0000000 --- a/generator/google/protobuf/internal/message_listener.py +++ /dev/null @@ -1,78 +0,0 @@ -# Protocol Buffers - Google's data interchange format -# Copyright 2008 Google Inc. All rights reserved. -# https://developers.google.com/protocol-buffers/ -# -# 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. - -"""Defines a listener interface for observing certain -state transitions on Message objects. - -Also defines a null implementation of this interface. -""" - -__author__ = 'robinson@google.com (Will Robinson)' - - -class MessageListener(object): - - """Listens for modifications made to a message. Meant to be registered via - Message._SetListener(). - - Attributes: - dirty: If True, then calling Modified() would be a no-op. This can be - used to avoid these calls entirely in the common case. - """ - - def Modified(self): - """Called every time the message is modified in such a way that the parent - message may need to be updated. This currently means either: - (a) The message was modified for the first time, so the parent message - should henceforth mark the message as present. - (b) The message's cached byte size became dirty -- i.e. the message was - modified for the first time after a previous call to ByteSize(). - Therefore the parent should also mark its byte size as dirty. - Note that (a) implies (b), since new objects start out with a client cached - size (zero). However, we document (a) explicitly because it is important. - - Modified() will *only* be called in response to one of these two events -- - not every time the sub-message is modified. - - Note that if the listener's |dirty| attribute is true, then calling - Modified at the moment would be a no-op, so it can be skipped. Performance- - sensitive callers should check this attribute directly before calling since - it will be true most of the time. - """ - - raise NotImplementedError - - -class NullMessageListener(object): - - """No-op MessageListener implementation.""" - - def Modified(self): - pass |