plugins/org.eclipse.viatra2.core2/src/org/eclipse/viatra2/core/simple/notification/NotificationObject.java

/*******************************************************************************
 * Copyright (c) 2004-2008 Andras Schmidt, Andras Balogh, Istvan Rath and Daniel Varro
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *    Andras Schmidt, Andras Balogh, Istvan Rath - initial API and implementation
 *******************************************************************************/

package org.eclipse.viatra2.core.simple.notification;

import java.util.Collection;
import java.util.HashSet;
import java.util.Set;

import org.eclipse.viatra2.core.ICoreNotificationListener;
import org.eclipse.viatra2.core.IModelElement;
import org.eclipse.viatra2.core.notification.ICoreNotificationObject;
import org.eclipse.viatra2.core.simple.SimpleModelElement;

/**
 * The base class implementing the Viatra Notification object. It is essentially
 * a data transfer object (DTO), serving as the basis of communication.
 * 
 * @author Andras Schmidt
 * 
 *         Modified on 2006.08.09 by Istvan Rath: - cleaned up javadoc
 */
public abstract class NotificationObject implements ICoreNotificationObject {
	String type = "";

	Set<ICoreNotificationListener> listeners = new HashSet<ICoreNotificationListener>();

	Set<IModelElement> notifiedObjects = new HashSet<IModelElement>();

	public IModelElement getModelElement() {
		return null;
	}

	public String getActionType() {
		return getActionTypeEnum().toString();
	}
	
	public Collection<ICoreNotificationListener> getListeners() {
		return listeners;
	}

	public String toString() {
		return getActionTypeEnum().toString();
	}

	void addListener(IModelElement me) {
		if (me != null) {
			notifiedObjects.add(me);
			if (me instanceof SimpleModelElement)
				listeners.addAll(((SimpleModelElement) me)
						.getNotificationListeners());
		}
	}

	public Collection<IModelElement> getNotifiedObjects() {
		return notifiedObjects;
	}
}