SquirrelJME/SquirrelJME

// -*- Mode: Java; indent-tabs-mode: t; tab-width: 4 -*-
// ---------------------------------------------------------------------------
// SquirrelJME
//     Copyright (C) Stephanie Gawroriski <xer@multiphasicapps.net>
// ---------------------------------------------------------------------------
// SquirrelJME is under the Mozilla Public License Version 2.0.
// See license.mkd for licensing and copyright information.
// ---------------------------------------------------------------------------

package cc.squirreljme.runtime.cldc.util;

import java.util.Map;

/**
 * This is a synchronized map entry.
 *
 * @param <K> The key.
 * @param <V> The value.
 * @since 2019/05/05
 */
public final class SynchronizedMapEntry<K, V>
    implements Map.Entry<K, V>
{
    /** The locking object. */
    protected final Object lock;
    
    /** The backing entry. */
    protected final Map.Entry<K, V> entry;
    
    /**
     * Initializes the synchronized entry.
     *
     * @param __lock The locking object.
     * @param __ent The entry object.
     * @throws NullPointerException On null arguments.
     * @since 2019/05/05
     */
    public SynchronizedMapEntry(Object __lock, Map.Entry<K, V> __ent)
        throws NullPointerException
    {
        if (__lock == null || __ent == null)
            throw new NullPointerException("NARG");
        
        this.lock = __lock;
        this.entry = __ent;
    }
    
    /**
     * {@inheritDoc}
     * @since 2019/05/05
     */
    @Override
    public final boolean equals(Object __o)
    {
        synchronized (this.lock)
        {
            return this.entry.equals(__o);
        }
    }
    
    /**
     * {@inheritDoc}
     * @since 2019/05/05
     */
    @Override
    public final K getKey()
    {
        synchronized (this.lock)
        {
            return this.entry.getKey();
        }
    }
    
    /**
     * {@inheritDoc}
     * @since 2019/05/05
     */
    @Override
    public final V getValue()
    {
        synchronized (this.lock)
        {
            return this.entry.getValue();
        }
    }
    
    /**
     * {@inheritDoc}
     * @since 2019/05/05
     */
    @Override
    public final int hashCode()
    {
        synchronized (this.lock)
        {
            return this.entry.hashCode();
        }
    }
    
    /**
     * {@inheritDoc}
     * @since 2019/05/05
     */
    @Override
    public final V setValue(V __v)
    {
        synchronized (this.lock)
        {
            return this.entry.setValue(__v);
        }
    }
    
    /**
     * {@inheritDoc}
     * @since 2019/05/05
     */
    @Override
    public final String toString()
    {
        synchronized (this.lock)
        {
            return this.entry.toString();
        }
    }
}