1 /* 2 * Copyright 2004 The Apache Software Foundation 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package org.apache.commons.collections.iterators; 17 18 import java.util.ListIterator; 19 20 import org.apache.commons.collections.ResettableListIterator; 21 22 /** 23 * Provides an implementation of an empty list iterator. 24 * <p> 25 * This class provides an implementation of an empty list iterator. 26 * This class provides for binary compatability between Commons Collections 27 * 2.1.1 and 3.1 due to issues with <code>IteratorUtils</code>. 28 * 29 * @since Commons Collections 2.1.1 and 3.1 30 * @version $Revision: 1.2 $ $Date: 2004/05/26 21:53:18 $ 31 * 32 * @author Stephen Colebourne 33 */ 34 public class EmptyListIterator extends AbstractEmptyIterator implements ResettableListIterator { 35 36 /** 37 * Singleton instance of the iterator. 38 * @since Commons Collections 3.1 39 */ 40 public static final ResettableListIterator RESETTABLE_INSTANCE = new EmptyListIterator(); 41 /** 42 * Singleton instance of the iterator. 43 * @since Commons Collections 2.1.1 and 3.1 44 */ 45 public static final ListIterator INSTANCE = RESETTABLE_INSTANCE; 46 47 /** 48 * Constructor. 49 */ 50 protected EmptyListIterator() { 51 super(); 52 } 53 54 } 55