com.partnersoft.gadgets
Class EventMulticaster

java.lang.Object
  com.partnersoft.gadgets.EventMulticaster

public abstract class EventMulticaster
extends java.lang.Object

A utility for managing Event multicasting. Use it as an inline class like so: specificEventMulticaster = new EventMulticaster() { protected void dispatchEvent(EventListener listener, EventObject evt) { ((SpecificEventListener)listener).takeSpecificEvent((SpecificEvent)evt); } }; Then use it like so: specificEventMulticaster.dispatchEvent(new SpecificEvent()); It's not type-safe, so the surrounding class should be. A listener can only be registered once; adding one twice is the same as adding it once.

Version:

1.0 3/5/97

Author:

Paul Reavis

Constructor Summary

EventMulticaster()

Method Summary

void	addListener(java.util.EventListener listener) Adds a listener.
void	addListenerImp(java.util.EventListener listener)
protected abstract void	dispatchEvent(java.util.EventListener listener, java.util.EventObject evt) Dispatches event to a single listener.
void	dispatchEvent(java.util.EventObject evt) Dispatches event to all listeners.
void	removeListener(java.util.EventListener listener) Removes a listener.
void	removeListenerImp(java.util.EventListener listener) Removes a listener.

Methods inherited from class java.lang.Object

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

Constructor Detail

EventMulticaster

public EventMulticaster()

Method Detail

addListener

public void addListener(java.util.EventListener listener)

Adds a listener.

removeListener

public void removeListener(java.util.EventListener listener)

Removes a listener.

dispatchEvent

public void dispatchEvent(java.util.EventObject evt)

Dispatches event to all listeners.

dispatchEvent

protected abstract void dispatchEvent(java.util.EventListener listener,
                                      java.util.EventObject evt)

Dispatches event to a single listener. Subclasses must override this.

addListenerImp

public void addListenerImp(java.util.EventListener listener)

removeListenerImp

public void removeListenerImp(java.util.EventListener listener)

Removes a listener.