U
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£ý°du ã @ s, d Z dZG dd deZG dd deZdS )zDefines a listener interface for observing certain
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state transitions on Message objects.
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Also defines a null implementation of this interface.
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z#robinson@google.com (Will Robinson)c @ s e Zd ZdZdd ZdS )ÚMessageListenera Listens for modifications made to a message. Meant to be registered via
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Message._SetListener().
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Attributes:
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dirty: If True, then calling Modified() would be a no-op. This can be
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used to avoid these calls entirely in the common case.
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c C s t dS )a Called every time the message is modified in such a way that the parent
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message may need to be updated. This currently means either:
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(a) The message was modified for the first time, so the parent message
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should henceforth mark the message as present.
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(b) The message's cached byte size became dirty -- i.e. the message was
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modified for the first time after a previous call to ByteSize().
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Therefore the parent should also mark its byte size as dirty.
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Note that (a) implies (b), since new objects start out with a client cached
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size (zero). However, we document (a) explicitly because it is important.
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Modified() will *only* be called in response to one of these two events --
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not every time the sub-message is modified.
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Note that if the listener's |dirty| attribute is true, then calling
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Modified at the moment would be a no-op, so it can be skipped. Performance-
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sensitive callers should check this attribute directly before calling since
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it will be true most of the time.
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N)ÚNotImplementedError©Úself© r ú`d:\z\workplace\vscode\pyvenv\venv\Lib\site-packages\google/protobuf/internal/message_listener.pyÚModified2 s zMessageListener.ModifiedN©Ú__name__Ú
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__module__Ú __qualname__Ú__doc__r r r r r r ( s r c @ s e Zd ZdZdd ZdS )ÚNullMessageListenerz%No-op MessageListener implementation.c C s d S )Nr r r r r r M s z NullMessageListener.ModifiedNr r r r r r I s r N)r Ú
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__author__Úobjectr r r r r r Ú<module> s !
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