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.DoubleListIterator;
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 UnmodifiableDoubleListIterator extends ProxyDoubleListIterator {
29 UnmodifiableDoubleListIterator(DoubleListIterator iterator) {
30 this.proxied = iterator;
31 }
32
33 public void remove() {
34 throw new UnsupportedOperationException("This DoubleListIterator is not modifiable.");
35 }
36
37 public void add(double value) {
38 throw new UnsupportedOperationException("This DoubleListIterator is not modifiable.");
39 }
40
41 public void set(double value) {
42 throw new UnsupportedOperationException("This DoubleListIterator is not modifiable.");
43 }
44
45 protected DoubleListIterator getListIterator() {
46 return proxied;
47 }
48
49
50 public static final DoubleListIterator wrap(DoubleListIterator iterator) {
51 if(null == iterator) {
52 return null;
53 } else if(iterator instanceof UnmodifiableDoubleListIterator) {
54 return iterator;
55 } else {
56 return new UnmodifiableDoubleListIterator(iterator);
57 }
58 }
59
60 private DoubleListIterator proxied = null;
61 }