001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.apache.commons.collections.primitives.decorators; 018 019import org.apache.commons.collections.primitives.ShortListIterator; 020 021/** 022 * 023 * @since Commons Primitives 1.0 024 * @version $Revision: 480463 $ $Date: 2006-11-29 03:15:23 -0500 (Wed, 29 Nov 2006) $ 025 * 026 * @author Rodney Waldhoff 027 */ 028public final class UnmodifiableShortListIterator extends ProxyShortListIterator { 029 UnmodifiableShortListIterator(ShortListIterator iterator) { 030 this.proxied = iterator; 031 } 032 033 public void remove() { 034 throw new UnsupportedOperationException("This ShortListIterator is not modifiable."); 035 } 036 037 public void add(short value) { 038 throw new UnsupportedOperationException("This ShortListIterator is not modifiable."); 039 } 040 041 public void set(short value) { 042 throw new UnsupportedOperationException("This ShortListIterator is not modifiable."); 043 } 044 045 protected ShortListIterator getListIterator() { 046 return proxied; 047 } 048 049 050 public static final ShortListIterator wrap(ShortListIterator iterator) { 051 if(null == iterator) { 052 return null; 053 } else if(iterator instanceof UnmodifiableShortListIterator) { 054 return iterator; 055 } else { 056 return new UnmodifiableShortListIterator(iterator); 057 } 058 } 059 060 private ShortListIterator proxied = null; 061}