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 */ 017 package org.apache.commons.collections.list; 018 019 import java.util.Collection; 020 import java.util.List; 021 import java.util.ListIterator; 022 023 import org.apache.commons.collections.collection.AbstractCollectionDecorator; 024 025 /** 026 * Decorates another <code>List</code> to provide additional behaviour. 027 * <p> 028 * Methods are forwarded directly to the decorated list. 029 * 030 * @since Commons Collections 3.0 031 * @version $Revision: 646777 $ $Date: 2008-04-10 13:33:15 +0100 (Thu, 10 Apr 2008) $ 032 * 033 * @author Stephen Colebourne 034 */ 035 public abstract class AbstractListDecorator extends AbstractCollectionDecorator implements List { 036 037 /** 038 * Constructor only used in deserialization, do not use otherwise. 039 * @since Commons Collections 3.1 040 */ 041 protected AbstractListDecorator() { 042 super(); 043 } 044 045 /** 046 * Constructor that wraps (not copies). 047 * 048 * @param list the list to decorate, must not be null 049 * @throws IllegalArgumentException if list is null 050 */ 051 protected AbstractListDecorator(List list) { 052 super(list); 053 } 054 055 /** 056 * Gets the list being decorated. 057 * 058 * @return the decorated list 059 */ 060 protected List getList() { 061 return (List) getCollection(); 062 } 063 064 //----------------------------------------------------------------------- 065 public void add(int index, Object object) { 066 getList().add(index, object); 067 } 068 069 public boolean addAll(int index, Collection coll) { 070 return getList().addAll(index, coll); 071 } 072 073 public Object get(int index) { 074 return getList().get(index); 075 } 076 077 public int indexOf(Object object) { 078 return getList().indexOf(object); 079 } 080 081 public int lastIndexOf(Object object) { 082 return getList().lastIndexOf(object); 083 } 084 085 public ListIterator listIterator() { 086 return getList().listIterator(); 087 } 088 089 public ListIterator listIterator(int index) { 090 return getList().listIterator(index); 091 } 092 093 public Object remove(int index) { 094 return getList().remove(index); 095 } 096 097 public Object set(int index, Object object) { 098 return getList().set(index, object); 099 } 100 101 public List subList(int fromIndex, int toIndex) { 102 return getList().subList(fromIndex, toIndex); 103 } 104 105 }