NoLock.java

/*
 * Copyright 2010-2015 JetBrains s.r.o.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.jetbrains.kotlin.storage;

import org.jetbrains.annotations.NotNull;

import java.util.concurrent.TimeUnit;
import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;

/*package*/ class NoLock implements Lock {
    public static final Lock INSTANCE = new NoLock();

    private NoLock() {
    }

    @Override
    public void lock() {
        // Do nothing
    }

    @Override
    public void unlock() {
        // Do nothing
    }

    @Override
    public void lockInterruptibly() throws InterruptedException {
        throw new UnsupportedOperationException("Should not be called");
    }

    @Override
    public boolean tryLock() {
        throw new UnsupportedOperationException("Should not be called");
    }

    @Override
    public boolean tryLock(long time, @NotNull TimeUnit unit) throws InterruptedException {
        throw new UnsupportedOperationException("Should not be called");
    }

    @NotNull
    @Override
    public Condition newCondition() {
        throw new UnsupportedOperationException("Should not be called");
    }
}