registrationhandler.java

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/*
 * Created on May 17, 2005
 */
package org.flexdock.perspective.event;

import java.util.EventListener;

import org.flexdock.docking.Dockable;
import org.flexdock.event.Event;
import org.flexdock.event.EventHandler;
import org.flexdock.perspective.Perspective;

/**
 * @author Christopher Butler
 */
public class RegistrationHandler extends EventHandler {

	public boolean acceptsEvent(Event evt) {
		return evt instanceof RegistrationEvent;
	}
	
	public boolean acceptsListener(EventListener listener) {
		return listener instanceof RegistrationListener;
	}
	public void handleEvent(Event evt, EventListener listener, int eventType) {

		RegistrationEvent event = (RegistrationEvent)evt;
		RegistrationListener consumer = (RegistrationListener)listener;

		switch(eventType) {
			case RegistrationEvent.REGISTERED:
				register(event, consumer);
				break;
			case RegistrationEvent.UNREGISTERED:
				unregister(event, consumer);
				break;
		}
	}
	
	private void register(RegistrationEvent evt, RegistrationListener listener) {
		if(evt.getSource() instanceof Perspective)
			listener.perspectiveAdded(evt);
		else if(evt.getSource() instanceof Dockable)
			listener.dockableAdded(evt);
	}
	
	private void unregister(RegistrationEvent evt, RegistrationListener listener) {
		if(evt.getSource() instanceof Perspective)
			listener.perspectiveRemoved(evt);
		else if(evt.getSource() instanceof Dockable)
			listener.dockableRemoved(evt);
	}
}