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Event-driven lists for dynamically filtered and sorted tables

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/* Glazed Lists                                                 (c) 2003-2006 */
/* http://publicobject.com/glazedlists/                      publicobject.com,*/
/*                                                     O'Dell Engineering Ltd.*/
package ca.odell.glazedlists.util.concurrent;

/**
 * This factory provides an implementation of {@link Lock} that is optimized
 * for the current Java Virtual Machine.
 *
 * @author Rob Eden
 * @author James Lemieux
 */
public interface LockFactory {

    /** The Lock factory for this JVM. */
    public static final LockFactory DEFAULT = new DelegateLockFactory();

    /**
     * Create a {@link ReadWriteLock}.
     */
    public ReadWriteLock createReadWriteLock();

    /**
     * Create a {@link Lock}.
     */
    public Lock createLock();
}

/**
 * An implementation of {@link LockFactory} that detects and delegates to
 * a JVM specific LockFactory implementation optimized for the current JVM.
 */
class DelegateLockFactory implements LockFactory {

    /** The true JVM-specific LockFactory to which we delegate. */
    private LockFactory delegate;

    DelegateLockFactory() {
        delegate = new J2SE50LockFactory();
    }

    @Override
    public ReadWriteLock createReadWriteLock() {
        return delegate.createReadWriteLock();
    }

    @Override
    public Lock createLock() {
        return delegate.createLock();
    }
}