01: /*
02: * $Id: IteratorAdapter.java 471754 2006-11-06 14:55:09Z husted $
03: *
04: * Licensed to the Apache Software Foundation (ASF) under one
05: * or more contributor license agreements. See the NOTICE file
06: * distributed with this work for additional information
07: * regarding copyright ownership. The ASF licenses this file
08: * to you under the Apache License, Version 2.0 (the
09: * "License"); you may not use this file except in compliance
10: * with the License. You may obtain a copy of the License at
11: *
12: * http://www.apache.org/licenses/LICENSE-2.0
13: *
14: * Unless required by applicable law or agreed to in writing,
15: * software distributed under the License is distributed on an
16: * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17: * KIND, either express or implied. See the License for the
18: * specific language governing permissions and limitations
19: * under the License.
20: */
21: package org.apache.struts.util;
22:
23: import java.util.Enumeration;
24: import java.util.Iterator;
25: import java.util.NoSuchElementException;
26:
27: /**
28: * Utility method for converting Enumeration to an Iterator class. If you
29: * attempt to remove() an Object from the iterator, it will throw an
30: * UnsupportedOperationException. Added for use by TagLib so Enumeration can
31: * be supported
32: *
33: * @version $Rev: 471754 $ $Date: 2005-05-07 12:11:38 -0400 (Sat, 07 May 2005)
34: * $
35: */
36: public class IteratorAdapter implements Iterator {
37: private Enumeration e;
38:
39: public IteratorAdapter(Enumeration e) {
40: this .e = e;
41: }
42:
43: public boolean hasNext() {
44: return e.hasMoreElements();
45: }
46:
47: public Object next() {
48: if (!e.hasMoreElements()) {
49: throw new NoSuchElementException(
50: "IteratorAdaptor.next() has no more elements");
51: }
52:
53: return e.nextElement();
54: }
55:
56: public void remove() {
57: throw new UnsupportedOperationException(
58: "Method IteratorAdaptor.remove() not implemented");
59: }
60: }
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