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편집 파일: base.cpython-37.pyc
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These collections are represented both at the class level of a particular ``_Dispatch`` class as well as within instances of ``_Dispatch``. � )�absolute_importN� )�_ClsLevelDispatch)�_EmptyListener)�_JoinedListener� )�utilc C s | � d� o| dkS )N�_�dispatch)� startswith)�name� r �H/opt/alt/python37/lib64/python3.7/site-packages/sqlalchemy/event/base.py�_is_event_name s r c @ s e Zd ZdZdd� ZdS )�_UnpickleDispatchz�Serializable callable that re-generates an instance of :class:`_Dispatch` given a particular :class:`.Events` subclass. c C s8 x2|j D ] }d|jkr|jd j�|�S qW td��d S )Nr z*No class with a 'dispatch' member present.)�__mro__�__dict__r � _for_class�AttributeError)�self� _instance_cls�clsr r r �__call__) s z_UnpickleDispatch.__call__N)�__name__� __module__� __qualname__�__doc__r r r r r r # s r c @ sx e Zd ZdZdZe�� Zddd�Zdd� Z e dd � �Z e d d � �Z d d � Z dd� Zdd� Zdd� Zddd�Zdd� ZdS )� _Dispatcha; Mirror the event listening definitions of an Events class with listener collections. 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This decouples the construction of :class:`.Events` subclasses from the implementation used by the event internals, and allows inspecting tools like Sphinx to work in an unsurprising way against the public API. )�_parentr r �_empty_listenersNc sb || _ � | _� rXy| j� | _W q^ tk rT � fdd�|jD � | _| j� < Y q^X ni | _d S )Nc s i | ]}t |� �|j�qS r )r r )�.0�ls)� instance_clsr r � <dictcomp>W s z&_Dispatch.__init__.<locals>.<dictcomp>)r r �_empty_listener_regr �KeyError�_event_descriptors)r �parentr" r )r" r �__init__M s z_Dispatch.__init__c C sB y| j | }W n tk r* t|��Y nX t| |j|� |S d S )N)r r% r �setattrr )r r r! r r r � __getattr__^ s z_Dispatch.__getattr__c c s x| j D ]}t| |�V qW d S )N)� _event_names�getattr)r �kr r r r& i s z _Dispatch._event_descriptorsc C s | j jS )N)�_events�_listen)r r r r r/ p s z_Dispatch._listenc C s | � | |�S )N)� __class__)r r" r r r r t s z_Dispatch._for_classc C s |j }| �|�S )N)r0 r )r �instancer" r r r � _for_instancew s z_Dispatch._for_instancec C s< d| j jkr0td| j j tfd| ji�}|| j _| �| |�S )z�Create a 'join' of this :class:`._Dispatch` and another. 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Zjlr r r r* s z _JoinedDispatcher.__getattr__c C s | j jS )N)r' r/ )r r r r r/ s z_JoinedDispatcher._listenc C s | j jS )N)r' r. )r r r r r. s z_JoinedDispatcher._eventsN) r r r r r4 r( r* rB r/ r. r r r r r6 s r6 c @ s e Zd ZdZdd� Zdd� ZdS )rP z�Descriptor used by target classes to deliver the _Dispatch class at the class level and produce new _Dispatch instances for target instances. c C s |j | _ || _d S )N)r �events)r re r r r r( # s zdispatcher.__init__c C s( |d kr| j S | j �|� |jd< }|S )Nr )r r2 r )r �objr Zdispr r r �__get__' s zdispatcher.__get__N)r r r r r( rg r r r r rP s rP )r � __future__r r@ �attrr r r � r � defaultdict�listrL r �objectr r r5 rC rD rS �with_metaclassrT r6 rP r r r r �<module> s k "0