juneau-core/juneau-marshall/src/main/java/org/apache/juneau/internal/SimpleLock.java

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// *  http://www.apache.org/licenses/LICENSE-2.0                                                                             *
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package org.apache.juneau.internal;

import java.util.concurrent.locks.Lock;

/**
 * A simple auto-closeable wrapper around a lock.
 */
public class SimpleLock implements AutoCloseable {

	/**
	 * A simple no-op lock.
	 */
	public static final SimpleLock NO_OP = new SimpleLock(null);

	private final Lock lock;

	/**
	 * Constructor.
	 *
	 * @param lock The lock being wrapped.
	 */
	public SimpleLock(Lock lock) {
		this.lock = lock;
		if (lock != null)
			lock.lock();
	}

	@Override
	public void close() {
		if (lock != null)
			lock.unlock();
	}
}