/*
* AbstractDeterminateCancelableTask.java
*
* Copyright (C) 2010 Leo Osvald <leo.osvald@gmail.com>
*
* This file is part of SGLJ.
*
* SGLJ is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* SGLJ is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
package org.sglj.task;
import javax.swing.event.EventListenerList;
public abstract class AbstractDeterminateCancelableTask extends
AbstractDeterminateTask implements CancelableTask {
private final EventListenerList cancelListeners = new EventListenerList();
private TaskCancelEvent event;
@Override
public void addCancelableTaskListener(CancelableTaskListener l) {
addTaskListener(l);
addTaskCancelListener(l);
}
@Override
public void addTaskCancelListener(TaskCancelListener l) {
cancelListeners.add(TaskCancelListener.class, l);
}
@Override
public void removeCancelableTaskListener(CancelableTaskListener l) {
removeTaskListener(l);
removeTaskCancelListener(l);
}
@Override
public void removeTaskCancelListener(TaskCancelListener l) {
cancelListeners.remove(TaskCancelListener.class, l);
}
protected void fireTaskCanceled() {
Object[] listeners;
synchronized (cancelListeners) {
listeners = this.cancelListeners.getListenerList();
for (int i = listeners.length-2; i>=0; i-=2) {
if (listeners[i]==TaskCancelListener.class) {
if (event == null)
event = new TaskCancelEvent(this);
((TaskCancelListener)listeners[i+1]).taskCanceled(event);
}
}
}
}
}