View Javadoc

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.IntListIterator;
20  
21  /**
22   * 
23   * @since Commons Primitives 1.0
24   * @version $Revision: 480463 $ $Date: 2006-11-29 03:15:23 -0500 (Wed, 29 Nov 2006) $
25   * 
26   * @author Rodney Waldhoff 
27   */
28  public final class UnmodifiableIntListIterator extends ProxyIntListIterator {
29      UnmodifiableIntListIterator(IntListIterator iterator) {
30          this.proxied = iterator;
31      }
32      
33      public void remove() {
34          throw new UnsupportedOperationException("This IntListIterator is not modifiable.");
35      }
36  
37      public void add(int value) {
38          throw new UnsupportedOperationException("This IntListIterator is not modifiable.");
39      }
40  
41      public void set(int value) {
42          throw new UnsupportedOperationException("This IntListIterator is not modifiable.");
43      }
44  
45      protected IntListIterator getListIterator() {
46          return proxied;   
47      }
48      
49      
50      public static final IntListIterator wrap(IntListIterator iterator) {
51          if(null == iterator) {
52              return null; 
53          } else if(iterator instanceof UnmodifiableIntListIterator) {
54              return iterator;
55          } else {
56              return new UnmodifiableIntListIterator(iterator);
57          }
58      }
59  
60      private IntListIterator proxied = null;    
61  }