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 java.util;

/**
 * Descending iterator over the linked list.
 *
 * @param <E> The class type.
 * @since 2019/01/20
 */
final class __DescendingIteratorViaListIterator__<E>
    implements Iterator<E>
{
    /** The list iterator to use. */
    protected final ListIterator<E> it;
    
    /**
     * Initializes the descending iterator.
     *
     * @param __it The input iterator.
     * @throws NullPointerException On null arguments.
     * @since 2019/01/20
     */
    __DescendingIteratorViaListIterator__(ListIterator<E> __it)
        throws NullPointerException
    {
        if (__it == null)
            throw new NullPointerException("NARG");
        
        this.it = __it;
    }
    
    /**
     * {@inheritDoc}
     * @since 2019/01/20
     */
    @Override
    public final boolean hasNext()
    {
        return this.it.hasPrevious();
    }
    
    /**
     * {@inheritDoc}
     * @since 2019/01/20
     */
    @Override
    public final E next()
    {
        return this.it.previous();
    }
    
    /**
     * {@inheritDoc}
     * @since 2019/01/20
     */
    @Override
    public final void remove()
    {
        this.it.remove();
    }
}