de.fhg.igd.event
Interface EventReflector

All Known Implementing Classes:

EventReflectorImpl

public interface EventReflector

Interface implemented by classes that distribute events to registered Listener instances.

Version:

"$Id: EventReflector.java 1913 2007-08-08 02:41:53Z jpeters $"

Author:

Volker Roth

Method Summary

TrustedListener	addListener(Listener listener) Adds a Listener.
void	notifyListeners(Object trigger) Notifies all registered listeners which are alive of the given trigger event.

Method Detail

addListener

TrustedListener addListener(Listener listener)

Adds a Listener. The Listener will receive all events sent to this reflector. Listener instances passedto this method shall be wrapped in a TrustedListener which is then returned.

Parameters:

listener - The Listener to be registered.

Returns:

The TrustedListener that wraps around the given Listener.

Throws:

NullPointerException - if listener is null.

notifyListeners

void notifyListeners(Object trigger)

Notifies all registered listeners which are alive of the given trigger event. This method also removes listeners which are not alive anymore.

Parameters:

trigger - The object that is distributed to the registered listeners.

Throws:

NullPointerException - if the trigger is null.