org.perfectjpattern.core.behavioral.observer
Class ObserverProxy<E>

java.lang.Object
  org.perfectjpattern.core.behavioral.observer.ObserverProxy<E>

Type Parameters:

E - Type of event data that this IObserver subscribes to.

All Implemented Interfaces:

IObserver<E>

public final class ObserverProxy<E>
extends Object
implements IObserver<E>

Implementation of IObserver interface that acts as a Proxy to any plain non-Observer class type. Makes possible to have any given class type to Observe more than one type of Subject without update method name and signature clash.

Version:

$Revision: 1.0 $ $Date: Jul 1, 2007 5:20:12 AM $

Author:

Giovanni Azua

See Also:

IObserver

Constructor Summary

ObserverProxy(Class aClass, String aMethodName, Class... aParameters)
Constructs ObserverProxy from a target static class

ObserverProxy(Object anObject, String aMethodName, Class... aParameters)
Constructs ObserverProxy from a target instance

Method Summary

void	update(E anEventData) Notification from ISubject instance that a change has ocurred.

Methods inherited from class java.lang.Object

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

Constructor Detail

ObserverProxy

public ObserverProxy(Object anObject,
                     String aMethodName,
                     Class... aParameters)

Constructs ObserverProxy from a target instance

Parameters:

anObject - Target Object that will handle the notification message

aMethodName - Target method implemented in anObject that will handle notification messages

aParameters - Type of parameters passed in notification events e.g. changed state etc

ObserverProxy

public ObserverProxy(Class aClass,
                     String aMethodName,
                     Class... aParameters)

Constructs ObserverProxy from a target static class

Parameters:

aClass - Target helper static class that will handle the notification message

aMethodName - Target static method implemented in aClass that will handle notification messages

aParameters - Type of parameters passed in notification events e.g. changed state etc

Method Detail

update

public void update(E anEventData)

Notification from ISubject instance that a change has ocurred.

Specified by:

update in interface IObserver<E>

Parameters:

anEventData - Event data pushed to IObserver instances.