/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at legal-notices/CDDLv1_0.txt
 * or http://forgerock.org/license/CDDLv1.0.html.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at legal-notices/CDDLv1_0.txt.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information:
 *      Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 *
 *
 *      Copyright 2008 Sun Microsystems, Inc.
 *      Portions Copyright 2015 ForgeRock AS.
 */

package org.opends.guitools.controlpanel.util;

import javax.swing.SwingUtilities;

/**
* This class defines a thread that will be used to actually perform the
* processing for a background task.
* @param <T> type of object returned by the background task fed to this object
*/
class BackgroundTaskThread<T> extends Thread
{
 /** The background task that is to be processed. */
 private final BackgroundTask<T> backgroundTask;

 /**
  * Creates a new background task thread that will be used to process the
  * provided task.
  *
  * @param  backgroundTask  The task to be processed.
  */
 public BackgroundTaskThread(BackgroundTask<T> backgroundTask)
 {
   this.backgroundTask = backgroundTask;
 }

 /** Performs the processing associated with the background task. */
 public void run()
 {
   try
   {
     final T returnValue = backgroundTask.processBackgroundTask();
     SwingUtilities.invokeLater(new Runnable()
     {
       /** {@inheritDoc} */
       public void run()
       {
         backgroundTask.backgroundTaskCompleted(returnValue, null);
       }
     });
   }
   catch (final Throwable t)
   {
     if (!isInterrupted())
     {
       SwingUtilities.invokeLater(new Runnable()
       {
         /** {@inheritDoc} */
         public void run()
         {
           backgroundTask.backgroundTaskCompleted(null, t);
         }
       });
     }
   }
 }
}