/*
 * 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 2006-2008 Sun Microsystems, Inc.
 *      Portions Copyright 2015 ForgeRock AS.
 */
package org.opends.quicksetup.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()
      {
        public void run()
        {
          backgroundTask.backgroundTaskCompleted(returnValue, null);
        }
      });
    }
    catch (final Throwable t)
    {
      SwingUtilities.invokeLater(new Runnable()
      {
        public void run()
        {
          backgroundTask.backgroundTaskCompleted(null, t);
        }
      });
    }
  }
}
