SquirrelJME/SquirrelJME

// -*- Mode: Java; indent-tabs-mode: t; tab-width: 4 -*-
// ---------------------------------------------------------------------------
// Multi-Phasic Applications: 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 cc.squirreljme.runtime.cldc.debug.Debugging;
import java.util.Map;

/**
 * Single entry for array entry sets.
 *
 * @since 2023/09/03
 */
final class __ArrayEntrySetEntry__<K, V>
    implements Map.Entry<K, V>
{
    /** The value index. */
    private final int _index;
    
    /** The key used. */
    private final K _key;
    
    /** The values array, for setting. */
    private final Object[] _values;
    
    /**
     * Initializes the array entry.
     *
     * @param __key The key used.
     * @param __index The index of the entry.
     * @param __values The values used.
     * @throws NullPointerException On null arguments.
     * @since 2023/09/03
     */
    __ArrayEntrySetEntry__(K __key, int __index, Object[] __values)
        throws NullPointerException
    {
        if (__key == null || __values == null)
            throw new NullPointerException("NARG");
        
        this._key = __key;
        this._index = __index;
        this._values = __values;
    }
    
    /**
     * {@inheritDoc}
     * @since 2023/09/03
     */
    @Override
    public K getKey()
    {
        return this._key;
    }
    
    /**
     * {@inheritDoc}
     * @since 2023/09/03
     */
    @Override
    @SuppressWarnings("unchecked")
    public V getValue()
    {
        return (V)this._values[this._index];
    }
    
    /**
     * {@inheritDoc}
     * @since 2023/09/03
     */
    @SuppressWarnings("unchecked")
    @Override
    public V setValue(V __v)
    {
        Object[] values = this._values;
        int index = this._index;
        
        V old = (V)values[index];
        values[index] = __v;
        return old;
    }
}