001    /*
002     *  Licensed to the Apache Software Foundation (ASF) under one or more
003     *  contributor license agreements.  See the NOTICE file distributed with
004     *  this work for additional information regarding copyright ownership.
005     *  The ASF licenses this file to You under the Apache License, Version 2.0
006     *  (the "License"); you may not use this file except in compliance with
007     *  the License.  You may obtain a copy of the License at
008     *
009     *      http://www.apache.org/licenses/LICENSE-2.0
010     *
011     *  Unless required by applicable law or agreed to in writing, software
012     *  distributed under the License is distributed on an "AS IS" BASIS,
013     *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     *  See the License for the specific language governing permissions and
015     *  limitations under the License.
016     */
017    package org.apache.commons.collections.iterators;
018    
019    import org.apache.commons.collections.MapIterator;
020    import org.apache.commons.collections.ResettableIterator;
021    
022    /** 
023     * Provides an implementation of an empty map iterator.
024     *
025     * @since Commons Collections 3.1
026     * @version $Revision: 646777 $ $Date: 2008-04-10 13:33:15 +0100 (Thu, 10 Apr 2008) $
027     * 
028     * @author Stephen Colebourne
029     */
030    public class EmptyMapIterator extends AbstractEmptyIterator implements MapIterator, ResettableIterator {
031    
032        /**
033         * Singleton instance of the iterator.
034         * @since Commons Collections 3.1
035         */
036        public static final MapIterator INSTANCE = new EmptyMapIterator();
037    
038        /**
039         * Constructor.
040         */
041        protected EmptyMapIterator() {
042            super();
043        }
044    
045    }