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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   * @author <a href="mailto:geirm@optonline.net">Geir Magnusson Jr.</a>
27   * @version $Id: EnumerationIterator.java,v 1.3 2004/02/28 13:45:21 yoavs Exp $
28   */
29  public class EnumerationIterator implements Iterator
30  {
31      /***
32       * The enumeration to iterate.
33       */
34      private Enumeration enum = null;
35  
36      /***
37       * Creates a new iteratorwrapper instance for the specified 
38       * Enumeration.
39       *
40       * @param enum  The Enumeration to wrap.
41       */
42      public EnumerationIterator( Enumeration enum)
43      {
44          this.enum = enum;
45      }
46  
47      /***
48       * Move to next element in the array.
49       *
50       * @return The next object in the array.
51       */
52      public Object next()
53      {
54          return enum.nextElement();
55      }
56      
57      /***
58       * Check to see if there is another element in the array.
59       *
60       * @return Whether there is another element.
61       */
62      public boolean hasNext()
63      {
64          return enum.hasMoreElements();
65      }
66  
67      /***
68       *  Unimplemented.  No analogy in Enumeration
69       */
70      public void remove()
71      {
72          // not implemented
73      }
74     
75  }