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Java > Open Source Codes > org > apache > commons > collections > primitives > decorators > UnmodifiableIntIterator


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.commons.collections.primitives.decorators;
18
19 import org.apache.commons.collections.primitives.IntIterator;
20
21 /**
22  *
23  * @since Commons Primitives 1.0
24  * @version $Revision: 480463 $ $Date: 2006-11-29 00:15:23 -0800 (Wed, 29 Nov 2006) $
25  *
26  * @author Rodney Waldhoff
27  */
28 public final class UnmodifiableIntIterator extends ProxyIntIterator {
29     UnmodifiableIntIterator(IntIterator iterator) {
30         this.proxied = iterator;
31     }
32     
33     public void remove() {
34         throw new UnsupportedOperationException JavaDoc("This IntIterator is not modifiable.");
35     }
36
37     protected IntIterator getIterator() {
38         return proxied;
39     }
40     
41     
42     public static final IntIterator wrap(IntIterator iterator) {
43         if(null == iterator) {
44             return null;
45         } else if(iterator instanceof UnmodifiableIntIterator) {
46             return iterator;
47         } else {
48             return new UnmodifiableIntIterator(iterator);
49         }
50     }
51
52     private IntIterator proxied = null;
53 }
54
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