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.primitives.adapters;
18
19 import java.util.ListIterator;
20
21 import org.apache.commons.collections.primitives.IntListIterator;
22
23 /**
24 * Adapts a {@link Number}-valued {@link ListIterator ListIterator}
25 * to the {@link IntListIterator IntListIterator} interface.
26 * <p />
27 * This implementation delegates most methods
28 * to the provided {@link IntListIterator IntListIterator}
29 * implementation in the "obvious" way.
30 *
31 * @since Commons Primitives 0.1
32 * @version $Revision: 480462 $ $Date: 2006-11-29 03:15:00 -0500 (Wed, 29 Nov 2006) $
33 * @author Rodney Waldhoff
34 */
35 public class ListIteratorIntListIterator implements IntListIterator {
36
37 /**
38 * Create an {@link IntListIterator IntListIterator} wrapping
39 * the specified {@link ListIterator ListIterator}. When
40 * the given <i>iterator</i> is <code>null</code>,
41 * returns <code>null</code>.
42 *
43 * @param iterator the (possibly <code>null</code>)
44 * {@link ListIterator ListIterator} to wrap
45 * @return an {@link IntListIterator IntListIterator} wrapping the given
46 * <i>iterator</i>, or <code>null</code> when <i>iterator</i> is
47 * <code>null</code>.
48 */
49 public static IntListIterator wrap(ListIterator iterator) {
50 return null == iterator ? null : new ListIteratorIntListIterator(iterator);
51 }
52
53 /**
54 * Creates an {@link IntListIterator IntListIterator} wrapping
55 * the specified {@link ListIterator ListIterator}.
56 * @see #wrap
57 */
58 public ListIteratorIntListIterator(ListIterator iterator) {
59 _iterator = iterator;
60 }
61
62 public int nextIndex() {
63 return _iterator.nextIndex();
64 }
65
66 public int previousIndex() {
67 return _iterator.previousIndex();
68 }
69
70 public boolean hasNext() {
71 return _iterator.hasNext();
72 }
73
74 public boolean hasPrevious() {
75 return _iterator.hasPrevious();
76 }
77
78 public int next() {
79 return ((Number)_iterator.next()).intValue();
80 }
81
82 public int previous() {
83 return ((Number)_iterator.previous()).intValue();
84 }
85
86 public void add(int element) {
87 _iterator.add(new Integer(element));
88 }
89
90 public void set(int element) {
91 _iterator.set(new Integer(element));
92 }
93
94 public void remove() {
95 _iterator.remove();
96 }
97
98 private ListIterator _iterator = null;
99
100 }