/*

  *  Licensed to the Apache Software Foundation (ASF) under one

  *  or more contributor license agreements.  See the NOTICE file

  *  distributed with this work for additional information

  *  regarding copyright ownership.  The ASF licenses this file

  *  to you under the Apache License, Version 2.0 (the

  *  "License"); you may not use this file except in compliance

  *  with the License.  You may obtain a copy of the License at

  * 

  *  http://www.apache.org/licenses/LICENSE-2.0

  * 

  *  Unless required by applicable law or agreed to in writing,

  *  software distributed under the License is distributed on an

  *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

  *  KIND, either express or implied.  See the License for the

  *  specific language governing permissions and limitations

  *  under the License.

  */

 package org.apache.myfaces.shared_impl.util;

 import java.util.Iterator;

 import java.util.NoSuchElementException;

 /**

  * Iterator without elements

  *

  * @author Anton Koinov (latest modification by $Author: matzew $)

  * @version $Revision: 557350 $ $Date: 2007-07-18 13:19:50 -0500 (Wed, 18 Jul 2007) $

  */

 public final class NullIterator implements Iterator

 {

     //~ Static fields/initializers -----------------------------------------------------------------

     private static final NullIterator INSTANCE = new NullIterator();

     //~ Methods ------------------------------------------------------------------------------------

     public static final Iterator instance()

     {

         return INSTANCE;

     }

     public boolean hasNext()

     {

         return false;

     }

     public Object next()

     {

         throw new NoSuchElementException();

     }

     public void remove()

     {

         throw new UnsupportedOperationException(this.getClass().getName() + " UnsupportedOperationException");

     }

 }