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Java > Open Source Codes > org > apache > myfaces > util > NullIterator


1 /*
2  * Copyright 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 package org.apache.myfaces.util;
17
18 import java.util.Iterator JavaDoc;
19 import java.util.NoSuchElementException JavaDoc;
20
21
22 /**
23  * Iterator without elements
24  *
25  * @author Anton Koinov (latest modification by $Author: matze $)
26  * @version $Revision: 1.3 $ $Date: 2004/10/13 11:51:01 $
27  * $Log: NullIterator.java,v $
28  * Revision 1.3 2004/10/13 11:51:01 matze
29  * renamed packages to org.apache
30  *
31  * Revision 1.2 2004/07/01 22:01:13 mwessendorf
32  * ASF switch
33  *
34  * Revision 1.1 2004/03/30 15:37:17 manolito
35  * moved to share
36  *
37  */
38 public final class NullIterator implements Iterator JavaDoc
39 {
40     //~ Static fields/initializers -----------------------------------------------------------------
41
42     private static final NullIterator INSTANCE = new NullIterator();
43
44     //~ Methods ------------------------------------------------------------------------------------
45
46     public static final Iterator JavaDoc instance()
47     {
48         return INSTANCE;
49     }
50
51     public boolean hasNext()
52     {
53         return false;
54     }
55
56     public Object JavaDoc next()
57     {
58         throw new NoSuchElementException JavaDoc();
59     }
60
61     public void remove()
62     {
63         throw new UnsupportedOperationException JavaDoc(this.getClass().getName() + " UnsupportedOperationException");
64     }
65 }
66
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