1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17 package org.apache.portals.bridges.jsf;
18
19 import java.util.Iterator;
20 import java.util.NoSuchElementException;
21
22 /***
23 * <p>
24 * Iterator without elements.
25 * </p>
26 * <p>
27 * Code borrowed from myfaces.
28 * </p>
29 */
30 public final class NullIterator implements Iterator
31 {
32 private static final NullIterator INSTANCE = new NullIterator();
33
34 public static final Iterator instance()
35 {
36 return INSTANCE;
37 }
38
39 public boolean hasNext()
40 {
41 return false;
42 }
43
44 public Object next()
45 {
46 throw new NoSuchElementException();
47 }
48
49 public void remove()
50 {
51 throw new UnsupportedOperationException(this.getClass().getName() + " UnsupportedOperationException");
52 }
53 }