org.refcodes.observer

Class ObserverDescriptorImpl<E extends Event<?>,O extends Observer<E>,EM extends EventMatcher<E>>

java.lang.Object

org.refcodes.observer.ObserverDescriptorImpl<E,O,EM>

Type Parameters:

E - The event type.

O - the generic type

EM - the generic type

All Implemented Interfaces:

Observer<E>, ObserverDescriptor<E,O,EM>

public class ObserverDescriptorImpl<E extends Event<?>,O extends Observer<E>,EM extends EventMatcher<E>>
extends Object
implements ObserverDescriptor<E,O,EM>

As a descriptor describes something fixed, this class is immutable in the sense that there are no setters for the attributes. The attributes must be provided via the constructor.

Constructor Summary

Constructors

Constructor and Description
ObserverDescriptorImpl(O aEventListener, EM aEventMatcher) Constructs the event listener descriptor with the given event listener and the given event matcher.

Method Summary

Modifier and Type	Method and Description
EM	getEventMatcher() Returns the EventMatcher associated with the given Observer.
O	getObserver() Returns the Observer associated with the given EventMatcher.
void	onEvent(E aEvent) The listener implementing this interface is notified of an event via this method.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ObserverDescriptorImpl

public ObserverDescriptorImpl(O aEventListener,
                              EM aEventMatcher)

Constructs the event listener descriptor with the given event listener and the given event matcher.

Parameters:

aEventListener - The listener to be stored in the event listener descriptor.

aEventMatcher - The matcher to be stored in the event listener descriptor.

Method Detail

onEvent

public void onEvent(E aEvent)

The listener implementing this interface is notified of an event via this method. The publisher pushes the event to the subscriber.

Specified by:

onEvent in interface Observer<E extends Event<?>>

Parameters:

aEvent - aEvent The event to be pushed from the publisher to the subscriber.

getObserver

public O getObserver()

Returns the Observer associated with the given EventMatcher.

Specified by:

getObserver in interface ObserverDescriptor<E extends Event<?>,O extends Observer<E>,EM extends EventMatcher<E>>

Returns:

The Observer as it is being managed by the ObserverDescriptor.

getEventMatcher

public EM getEventMatcher()

Returns the EventMatcher associated with the given Observer.

Specified by:

getEventMatcher in interface ObserverDescriptor<E extends Event<?>,O extends Observer<E>,EM extends EventMatcher<E>>

Returns:

The EventMatcher as it is being managed by the ObserverDescriptor.