package de.spieleck.util;

import java.util.Iterator;
import java.util.NoSuchElementException;

/**
 * Convenicence class to provide an empty implementation of the
 * Iterator Interface. This is a Singleton.
 *
 */
public class EmptyIterator
 implements Iterator
{
    /** This is a Singleton.  */
    protected static Iterator mySelf = new EmptyIterator();

    /** This is a Singleton.  */
    private EmptyIterator() { }

    public static Iterator getInstance()
    {
        return mySelf;
    }

    public boolean hasNext()
    {
        return false;
    }

    public Object next()
    {
        // It's a hard world, just cry out loud
        throw new NoSuchElementException();
    }

    public void remove()
    {
        throw new UnsupportedOperationException("Cannot remove from EmptyIterator");
    }
}
//
//    Jacson - Text Filtering with Java.
//    Copyright (C) 2002 Frank S. Nestel (nestefan -at- users.sourceforge.net)
//
//    This library is free software; you can redistribute it and/or
//    modify it under the terms of the GNU Lesser General Public
//    License as published by the Free Software Foundation; either
//    version 2.1 of the License, or (at your option) any later version.
//
//    This library is distributed in the hope that it will be useful,
//    but WITHOUT ANY WARRANTY; without even the implied warranty of
//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
//    Lesser General Public License for more details.
//
//    You should have received a copy of the GNU Lesser General Public
//    License along with this library; if not, write to the Free Software
//    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//