/*******************************************************************************
* Copyright (c) 2000, 2016 IBM Corporation and others.
* 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:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.ui.internal.activities;
import org.eclipse.core.runtime.ListenerList;
import org.eclipse.ui.activities.ActivityManagerEvent;
import org.eclipse.ui.activities.IActivityManager;
import org.eclipse.ui.activities.IActivityManagerListener;
public abstract class AbstractActivityManager implements IActivityManager {
private ListenerList<IActivityManagerListener> activityManagerListeners;
protected AbstractActivityManager() {
}
@Override
public void addActivityManagerListener(
IActivityManagerListener activityManagerListener) {
if (activityManagerListener == null) {
throw new NullPointerException();
}
if (activityManagerListeners == null) {
activityManagerListeners = new ListenerList<>();
}
activityManagerListeners.add(activityManagerListener);
}
protected void fireActivityManagerChanged(
ActivityManagerEvent activityManagerEvent) {
if (activityManagerEvent == null) {
throw new NullPointerException();
}
if (activityManagerListeners != null) {
for (IActivityManagerListener listener : activityManagerListeners) {
listener.activityManagerChanged(activityManagerEvent);
}
}
}
@Override
public void removeActivityManagerListener(
IActivityManagerListener activityManagerListener) {
if (activityManagerListener == null) {
throw new NullPointerException();
}
if (activityManagerListeners != null) {
activityManagerListeners.remove(activityManagerListener);
}
}
}