1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17 package org.apache.commons.collections.iterators;
18
19 import java.util.ListIterator;
20
21 import org.apache.commons.collections.ResettableListIterator;
22
23 /**
24 * Provides an implementation of an empty list iterator.
25 * <p>
26 * This class provides an implementation of an empty list iterator.
27 * This class provides for binary compatability between Commons Collections
28 * 2.1.1 and 3.1 due to issues with <code>IteratorUtils</code>.
29 *
30 * @since Commons Collections 2.1.1 and 3.1
31 * @version $Revision: 646777 $ $Date: 2008-04-10 13:33:15 +0100 (Thu, 10 Apr 2008) $
32 *
33 * @author Stephen Colebourne
34 */
35 public class EmptyListIterator extends AbstractEmptyIterator implements ResettableListIterator {
36
37 /**
38 * Singleton instance of the iterator.
39 * @since Commons Collections 3.1
40 */
41 public static final ResettableListIterator RESETTABLE_INSTANCE = new EmptyListIterator();
42 /**
43 * Singleton instance of the iterator.
44 * @since Commons Collections 2.1.1 and 3.1
45 */
46 public static final ListIterator INSTANCE = RESETTABLE_INSTANCE;
47
48 /**
49 * Constructor.
50 */
51 protected EmptyListIterator() {
52 super();
53 }
54
55 }