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java.lang.Objectde.unikassel.android.sdcframework.util.ObservableEventSourceImpl<T>
T
- the observed event type extending ObservableEventpublic class ObservableEventSourceImpl<T extends ObservableEvent>
Generic implementation for an observable event source.
This class is implementing the ObservableEventSource
interface.
A class extending this type can notify it's registered observers about the
observed events by invoking the
notify
method.
Field Summary | |
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private ConcurrentLinkedQueue<EventObserver<T>> |
observers
The observer collection |
Constructor Summary | |
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ObservableEventSourceImpl()
Constructor |
Method Summary | |
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Collection<EventObserver<T>> |
getObservers()
Getter for the observers |
boolean |
hasObservers()
Test method for observers. |
void |
notify(T data)
Does set the changed flag and notifies all observers |
protected void |
onObserverRegistration(EventObserver<? extends T> observer)
Handler for registered observers ( to be overloaded by extending classes if necessary ) |
protected void |
onObserverUnregistration(EventObserver<? extends T> observer)
Handler for unregistered observers ( to be overloaded by extending classes if necessary ) |
void |
registerEventObserver(EventObserver<? extends T> observer)
Does register an observer |
void |
removeAllObservers()
Does remove all registered observers |
void |
unregisterEventObserver(EventObserver<? extends T> observer)
Does delete a registered observer |
Methods inherited from class java.lang.Object |
---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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private final ConcurrentLinkedQueue<EventObserver<T extends ObservableEvent>> observers
Constructor Detail |
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public ObservableEventSourceImpl()
Method Detail |
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public final Collection<EventObserver<T>> getObservers()
public final void registerEventObserver(EventObserver<? extends T> observer)
ObserverRegistration
registerEventObserver
in interface ObserverRegistration<T extends ObservableEvent>
observer
- the observer to addprotected void onObserverRegistration(EventObserver<? extends T> observer)
observer
- the registered observerpublic final void unregisterEventObserver(EventObserver<? extends T> observer)
ObserverRegistration
unregisterEventObserver
in interface ObserverRegistration<T extends ObservableEvent>
observer
- the observer to deleteprotected void onObserverUnregistration(EventObserver<? extends T> observer)
observer
- the unregistered observerpublic final void notify(T data)
ObservableEventSource
notify
in interface ObservableEventSource<T extends ObservableEvent>
data
- the observable event data to create notifications forpublic final void removeAllObservers()
ObserverRegistration
removeAllObservers
in interface ObserverRegistration<T extends ObservableEvent>
public final boolean hasObservers()
ObservableEventSource
hasObservers
in interface ObservableEventSource<T extends ObservableEvent>
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