/*

* Copyright (c) 2007 Nokia Corporation and/or its subsidiary(-ies). 

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:  Helper class for waiting asynchronous operations.

 *

*/

package com.nokia.tools.themeinstaller.installationmanager;

/**

 * Helper class for waiting asynchronous operations.

 */

public class Lock

    {

    private boolean iNotify = false;

    /*

     * Calls wait() if unLock() hasn't been called.

     * Causes thread to wait until unLock() is called.

     */

    synchronized public void lock()

        {

        if( !iNotify )

            {

            try

                {

                wait();

                }

            catch ( InterruptedException e )

                {

                //ignore

                }

            }

        iNotify = false;

        }

    /*

     * Called when asynchronous operation is ready.

     * Wakes up a thread that is waiting on this object's monitor.

     */

    synchronized public void unLock()

        {

        iNotify = true;

        notify();

        }

    }