ReverseListIterator


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.myfaces.util;
17  
18  import java.util.Iterator  ;
19  import java.util.List  ;
20  import java.util.NoSuchElementException  ;
21  
22  /**
23   * @author Manfred Geiler (latest modification by $Author: matze $)
24   * @version $Revision: 1.3 $ $Date: 2004/10/13 11:51:01 $
25   * $Log: ReverseListIterator.java,v $
26   * Revision 1.3  2004/10/13 11:51:01  matze
27   * renamed packages to org.apache
28   *
29   * Revision 1.2  2004/07/01 22:05:15  mwessendorf
30   * ASF switch
31   *
32   * Revision 1.1  2004/05/17 14:28:28  manolito
33   * new configuration concept
34   *
35   */
36  public class ReverseListIterator
37          implements Iterator  
38  {
39      //private static final Log log = LogFactory.getLog(ReverseListIterator.class);
40  
41      private int _cursor;
42      private List   _list;
43  
44      public ReverseListIterator(List   list)
45      {
46          _list = list;
47          _cursor = list.size() - 1;
48      }
49  
50      public boolean hasNext()
51      {
52          return _cursor >= 0;
53      }
54  
55      public Object   next()
56      {
57          if (_cursor < 0)
58          {
59              throw new NoSuchElementException  ();
60          }
61          return _list.get(_cursor--);
62      }
63  
64      public void remove()
65      {
66          throw new UnsupportedOperationException  ();
67      }
68  
69  }
70
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