001    // Copyright 2009 The Apache Software Foundation
002    //
003    // Licensed under the Apache License, Version 2.0 (the "License");
004    // you may not use this file except in compliance with the License.
005    // You may obtain a copy of the License at
006    //
007    //     http://www.apache.org/licenses/LICENSE-2.0
008    //
009    // Unless required by applicable law or agreed to in writing, software
010    // distributed under the License is distributed on an "AS IS" BASIS,
011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012    // See the License for the specific language governing permissions and
013    // limitations under the License.
014    
015    package org.apache.tapestry5.ioc.internal.util;
016    
017    import java.util.concurrent.TimeUnit;
018    import java.util.concurrent.locks.Condition;
019    import java.util.concurrent.locks.Lock;
020    
021    /**
022     * Acts like a Lock but all operations are no-ops.
023     */
024    public class DummyLock implements Lock
025    {
026        public void lock()
027        {
028        }
029    
030        public void lockInterruptibly() throws InterruptedException
031        {
032        }
033    
034        /**
035         * Returns null.
036         */
037        public Condition newCondition()
038        {
039            return null;
040        }
041    
042        /** @return true */
043        public boolean tryLock()
044        {
045            return true;
046        }
047    
048        /** @return true */
049        public boolean tryLock(long time, TimeUnit unit) throws InterruptedException
050        {
051            return true;
052        }
053    
054        public void unlock()
055        {
056        }
057    
058    }