LockFriend.java

/*
 * JBoss, Home of Professional Open Source
 * Copyright 2006, Red Hat Middleware LLC, and individual contributors 
 * as indicated by the @author tags. 
 * See the copyright.txt in the distribution for a
 * full listing of individual contributors. 
 * This copyrighted material is made available to anyone wishing to use,
 * modify, copy, or redistribute it subject to the terms and conditions
 * of the GNU Lesser General Public License, v. 2.1.
 * This program is distributed in the hope that it will be useful, but WITHOUT A 
 * 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,
 * v.2.1 along with this distribution; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, 
 * MA  02110-1301, USA.
 * 
 * (C) 2005-2006,
 * @author JBoss Inc.
 */
/*
 * Copyright (C) 1998, 1999, 2000,
 *
 * Arjuna Solutions Limited,
 * Newcastle upon Tyne,
 * Tyne and Wear,
 * UK.  
 *
 * $Id: LockList.java 2342 2006-03-30 13:06:17Z  $
 */

package com.arjuna.ats.internal.txoj;

import java.lang.reflect.Method;

import com.arjuna.ats.txoj.Lock;
import com.arjuna.ats.txoj.logging.txojLogger;

/**
 * A friend of Lock.
 * 
 * @author marklittle
 */

public class LockFriend
{
    public static final Lock getLink (Lock inst)
    {
        try
        {
            Method m = Lock.class.getDeclaredMethod("getLink", (Class[]) null);

            m.setAccessible(true);
            Lock l = (Lock) m.invoke(inst, (Object[]) null);
            m.setAccessible(false);
            
            return l;
        }
        catch (final Throwable ex)
        {
            txojLogger.i18NLogger.warn_lmf1(ex);
            
            return null;
        }
    }
    
    public static final void setLink (Lock inst, Lock link)
    {
        try
        {
            Method m = Lock.class.getDeclaredMethod("setLink", Lock.class);

            m.setAccessible(true);
            m.invoke(inst, link);
            m.setAccessible(false);
        }
        catch (final Throwable ex)
        {
            txojLogger.i18NLogger.warn_lmf2(ex);
        }
    }
}