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Java > Open Source Codes > org > jboss > util > collection > SerializableEnumeration


1 /*
2   * JBoss, Home of Professional Open Source
3   * Copyright 2005, JBoss Inc., and individual contributors as indicated
4   * by the @authors tag. See the copyright.txt in the distribution for a
5   * full listing of individual contributors.
6   *
7   * This is free software; you can redistribute it and/or modify it
8   * under the terms of the GNU Lesser General Public License as
9   * published by the Free Software Foundation; either version 2.1 of
10   * the License, or (at your option) any later version.
11   *
12   * This software is distributed in the hope that it will be useful,
13   * but WITHOUT ANY WARRANTY; without even the implied warranty of
14   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15   * Lesser General Public License for more details.
16   *
17   * You should have received a copy of the GNU Lesser General Public
18   * License along with this software; if not, write to the Free
19   * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20   * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
21   */
22 package org.jboss.util.collection;
23
24 import java.util.ArrayList JavaDoc;
25 import java.util.Collection JavaDoc;
26 import java.util.Enumeration JavaDoc;
27 import java.util.NoSuchElementException JavaDoc;
28
29 /**
30  * ???
31  *
32  * @author ???
33  * @version $Revision: 1958 $
34  */
35 public class SerializableEnumeration
36    extends ArrayList JavaDoc
37    implements Enumeration JavaDoc
38 {
39    private int index;
40
41    public SerializableEnumeration () {
42       index = 0;
43    }
44
45    public SerializableEnumeration (Collection JavaDoc c) {
46       super(c);
47       index = 0;
48    }
49      
50    public SerializableEnumeration (int initialCapacity) {
51       super(initialCapacity);
52       index = 0;
53    }
54      
55    public boolean hasMoreElements() {
56       return (index < size());
57    }
58     
59    public Object JavaDoc nextElement() throws NoSuchElementException JavaDoc
60    {
61       try {
62          Object JavaDoc nextObj = get(index);
63          index++;
64          return nextObj;
65       }
66       catch (IndexOutOfBoundsException JavaDoc e) {
67          throw new NoSuchElementException JavaDoc();
68       }
69    }
70
71    private void writeObject(java.io.ObjectOutputStream JavaDoc out)
72       throws java.io.IOException JavaDoc
73    {
74       // the only thing to write is the index field
75 out.defaultWriteObject();
76    }
77    
78    private void readObject(java.io.ObjectInputStream JavaDoc in)
79       throws java.io.IOException JavaDoc, ClassNotFoundException JavaDoc
80    {
81       in.defaultReadObject();
82    }
83 }
84
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