3 ‰dœ ã@sjddlmZddlmZddlmZdZddgZGdd„deƒZGdd„deƒZd d „Z e d krfe ƒd S) é)Úabsolute_import)Údivision)Úprint_functionaš Dirt Simple Events A Dispatcher (or a subclass of Dispatcher) stores event handlers that are 'fired' simple event objects when interesting things happen. Create a dispatcher: >>> d = Dispatcher() Now create a handler for the event and subscribe it to the dispatcher to handle Event events. A handler is a simple function or method that accepts the event as an argument: >>> def handler1(event): print(repr(event)) >>> d.subscribe(Event, handler1) Now dispatch a new event into the dispatcher, and see handler1 get fired: >>> d.dispatch(Event(foo='bar', data='yours', used_by='the event handlers')) ÚEventÚ Dispatcherc@s eZdZdZdd„Zdd„ZdS)ra An event is a container for attributes. The source of an event creates this object, or a subclass, gives it any kind of data that the events handlers need to handle the event, and then calls notify(event). The target of an event registers a function to handle the event it is interested with subscribe(). When a sources calls notify(event), each subscriber to that event will be called in no particular order. cKs|jj|ƒdS)N)Ú__dict__Úupdate)ÚselfÚkw©r ú//tmp/pip-build-7vycvbft/rdflib/rdflib/events.pyÚ__init__-szEvent.__init__cCs"t|jjƒƒ}ddd„|DƒfS)NzcSsg|]}|‘qSr r )Ú.0Úar r r ú 2sz"Event.__repr__..)ÚsortedrÚkeys)r Úattrsr r r Ú__repr__0szEvent.__repr__N)Ú__name__Ú __module__Ú __qualname__Ú__doc__r rr r r r r s c@s4eZdZdZdZdd„Zdd„Zdd„Zd d „ZdS) rz] An object that can dispatch events to a privately managed group of subscribers. NcCs ||_dS)N)Ú _dispatch_map)r Zamapr r r Úset_map=szDispatcher.set_mapcCs|jS)N)r)r r r r Úget_map@szDispatcher.get_mapcCsJ|jdkr|jiƒ|jj|dƒ}|dkr2|g}n |j|ƒ||j|<dS)zv Subscribe the given handler to an event_type. Handlers are called in the order they are subscribed. N)rrÚgetÚappend)r Z event_typeÚhandlerÚlstr r r Ú subscribeCs   zDispatcher.subscribecCsN|jdk rJ|jjt|ƒdƒ}|dkr4tdt|ƒƒ‚x|D] }||ƒq:WdS)zQ Dispatch the given event to the subscribed handlers for the event's typeNzunknown event type: %s)rrÚtypeÚ ValueError)r ÚeventrÚlr r r ÚdispatchPs   zDispatcher.dispatch) rrrrrrrr r%r r r r r5s  cCsddl}|jƒdS)Nr)ÚdoctestÚtestmod)r&r r r Útest[sr(Ú__main__N) Ú __future__rrrrÚ__all__Úobjectrrr(rr r r r Ús   &