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Java > Open Source Codes > org > apache > commons > collections > primitives > adapters > ListIteratorShortListIterator


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 JavaDoc;
20
21 import org.apache.commons.collections.primitives.ShortListIterator;
22
23 /**
24  * Adapts a {@link Number}-valued {@link ListIterator ListIterator}
25  * to the {@link ShortListIterator ShortListIterator} interface.
26  * <p />
27  * This implementation delegates most methods
28  * to the provided {@link ShortListIterator ShortListIterator}
29  * implementation in the "obvious" way.
30  *
31  * @since Commons Primitives 1.0
32  * @version $Revision: 480462 $ $Date: 2006-11-29 00:15:00 -0800 (Wed, 29 Nov 2006) $
33  * @author Rodney Waldhoff
34  */
35 public class ListIteratorShortListIterator implements ShortListIterator {
36         
37     /**
38      * Create an {@link ShortListIterator ShortListIterator} 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 ShortListIterator ShortListIterator} wrapping the given
46      * <i>iterator</i>, or <code>null</code> when <i>iterator</i> is
47      * <code>null</code>.
48      */
49     public static ShortListIterator wrap(ListIterator JavaDoc iterator) {
50         return null == iterator ? null : new ListIteratorShortListIterator(iterator);
51     }
52     
53     /**
54      * Creates an {@link ShortListIterator ShortListIterator} wrapping
55      * the specified {@link ListIterator ListIterator}.
56      * @see #wrap
57      */
58     public ListIteratorShortListIterator(ListIterator JavaDoc 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 short next() {
79         return ((Number JavaDoc)_iterator.next()).shortValue();
80     }
81
82     public short previous() {
83         return ((Number JavaDoc)_iterator.previous()).shortValue();
84     }
85
86     public void add(short element) {
87         _iterator.add(new Short JavaDoc(element));
88     }
89       
90     public void set(short element) {
91         _iterator.set(new Short JavaDoc(element));
92     }
93
94     public void remove() {
95         _iterator.remove();
96     }
97       
98     private ListIterator JavaDoc _iterator = null;
99
100 }
101
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