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Java > Open Source Codes > org > objectweb > jorm > lib > EmptyPNameIterator


1 /**
2  * Copyright (C) 2004 France Telecom R&D
3  *
4  * This library is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2 of the License, or (at your option) any later version.
8  *
9  * This library is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with this library; if not, write to the Free Software
16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17  */
18 package org.objectweb.jorm.lib;
19
20 import org.objectweb.jorm.api.PNameIterator;
21 import org.objectweb.jorm.api.PException;
22
23 import java.util.NoSuchElementException JavaDoc;
24
25 /**
26  *
27  * @author S.Chassande-Barrioz
28  */
29 public class EmptyPNameIterator implements PNameIterator {
30
31     private static PNameIterator instance;
32
33     public static synchronized PNameIterator getInstance() {
34         if (instance == null) {
35             instance = new EmptyPNameIterator();
36         }
37         return instance;
38     }
39
40     private EmptyPNameIterator() {
41     }
42
43     public void close() throws PException {
44     }
45
46     public boolean hasNext() {
47         return false;
48     }
49
50     public Object JavaDoc next() {
51         throw new NoSuchElementException JavaDoc();
52     }
53
54     public void remove() {
55         throw new UnsupportedOperationException JavaDoc("Remove operation not supported");
56     }
57 }
58
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