1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18 package org.apache.struts.util;
19
20 import java.util.Enumeration;
21 import java.util.Iterator;
22 import java.util.NoSuchElementException;
23
24 /***
25 * Utility method for converting Enumeration to an Iterator class. If you
26 * attempt to remove() an Object from the iterator, it will throw an
27 * UnsupportedOperationException. Added for use by TagLib so Enumeration can
28 * be supported
29 *
30 * @version $Rev: 421119 $ $Date: 2005-05-07 12:11:38 -0400 (Sat, 07 May 2005)
31 * $
32 */
33 public class IteratorAdapter implements Iterator {
34 private Enumeration e;
35
36 public IteratorAdapter(Enumeration e) {
37 this.e = e;
38 }
39
40 public boolean hasNext() {
41 return e.hasMoreElements();
42 }
43
44 public Object next() {
45 if (!e.hasMoreElements()) {
46 throw new NoSuchElementException(
47 "IteratorAdaptor.next() has no more elements");
48 }
49
50 return e.nextElement();
51 }
52
53 public void remove() {
54 throw new UnsupportedOperationException(
55 "Method IteratorAdaptor.remove() not implemented");
56 }
57 }