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 net.multiphasicapps.collections;

import java.util.Map;

/**
 * Wraps a single entry within an identity map.
 *
 * @since 2021/11/28
 */
final class __IdentityMapEntry__<K, V>
    implements Map.Entry<K, V>
{
    /** The entry to wrap. */
    private final Map.Entry<Identity<K>, V> _entry;
    
    /**
     * Initializes the wrapped entry.
     * 
     * @param __entry The entry to wrap.
     * @throws NullPointerException On null arguments.
     * @since 2021/11/28
     */
    __IdentityMapEntry__(Map.Entry<Identity<K>, V> __entry)
        throws NullPointerException
    {
        if (__entry == null)
            throw new NullPointerException("NARG");
        
        this._entry = __entry;
    }
    
    /**
     * {@inheritDoc}
     * @since 2021/11/28
     */
    @Override
    public K getKey()
    {
        Identity<K> key = this._entry.getKey();
        return (key == null ? null : key.value);
    }
    
    /**
     * {@inheritDoc}
     * @since 2021/11/28
     */
    @Override
    public V getValue()
    {
        return this._entry.getValue();
    }
    
    /**
     * {@inheritDoc}
     * @since 2021/11/28
     */
    @Override
    public V setValue(V __v)
    {
        return this._entry.setValue(__v);
    }
}