    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    }