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.AbstractSet;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;

/**
 * Entry set which uses an array base.
 *
 * @param <K> The key type.
 * @param <V> The value type.
 * @since 2023/09/03
 */
final class __ArrayEntrySet__<K, V>
    extends AbstractSet<Map.Entry<K, V>>
{
    /** The keys. */
    private final K[] _keys;
    
    /** The values. */
    private final Object[] _values;
    
    /**
     * Initializes the array based entry set.
     *
     * @param __keys The keys used.
     * @param __values The values used.
     * @throws IllegalArgumentException If the lengths do not match.
     * @throws NullPointerException On null arguments.
     * @since 2023/09/03
     */
    __ArrayEntrySet__(K[] __keys, Object[] __values)
        throws IllegalArgumentException, NullPointerException
    {
        if (__keys == null || __values == null)
            throw new NullPointerException("NARG");
        if (__keys.length != __values.length)
            throw new IllegalArgumentException("ILLG");
        
        this._keys = __keys;
        this._values = __values;
    }
    
    /**
     * {@inheritDoc}
     * @since 2023/09/03
     */
    @Override
    public Iterator<Map.Entry<K, V>> iterator()
    {
        return new __ArrayEntrySetIterator__(this._keys, this._values);
    }
    
    /**
     * {@inheritDoc}
     * @since 2023/09/03
     */
    @Override
    public int size()
    {
        return this._keys.length;
    }
}