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1   /*
2    * Copyright 1999-2001,2004 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  
17  package org.apache.commons.jexl.util;
18  
19  
20  import java.util.Iterator;
21  import java.util.Enumeration;
22  
23  /***
24   * An Iterator wrapper for an Enumeration.
25   *
26   * @since 1.0
27   * @author <a href="mailto:geirm@optonline.net">Geir Magnusson Jr.</a>
28   * @version $Id: EnumerationIterator.java 398330 2006-04-30 12:52:35Z dion $
29   */
30  public class EnumerationIterator implements Iterator {
31      /***
32       * The enumeration to iterate over.
33       */
34      private final Enumeration enumeration;
35  
36      /***
37       * Creates a new iteratorwrapper instance for the specified 
38       * Enumeration.
39       *
40       * @param enumer  The Enumeration to wrap.
41       */
42      public EnumerationIterator(Enumeration enumer) {
43          enumeration = enumer;
44      }
45  
46      /***
47       * Move to next element in the array.
48       *
49       * @return The next object in the array.
50       */
51      public Object next() {
52          return enumeration.nextElement();
53      }
54      
55      /***
56       * Check to see if there is another element in the array.
57       *
58       * @return Whether there is another element.
59       */
60      public boolean hasNext() {
61          return enumeration.hasMoreElements();
62      }
63  
64      /***
65       *  Unimplemented.  No analogy in Enumeration
66       */
67      public void remove() {
68          // not implemented
69      }
70     
71  }