1 /* 2 * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 import java.util.ArrayList; 24 import java.util.AbstractList; 25 import java.util.Collection; 26 import java.util.Iterator; 27 import java.util.List; 28 import java.util.function.Supplier; 29 30 /** 31 * @library 32 * 33 * A simple mutable list implementation that provides only default 34 * implementations of all methods. ie. none of the List interface default 35 * methods have overridden implementations. 36 * 37 * @param <E> type of list elements 38 */ 39 public class ExtendsAbstractList<E> extends AbstractList<E> { 40 41 protected final List<E> list; 42 43 public ExtendsAbstractList() { 44 this(ArrayList<E>::new); 45 } 46 47 protected ExtendsAbstractList(Supplier<List<E>> supplier) { 48 this.list = supplier.get(); 49 } 50 51 public ExtendsAbstractList(Collection<E> source) { 52 this(); 53 addAll(source); 54 } 55 56 public boolean add(E element) { 57 return list.add(element); 58 } 59 60 public E get(int index) { 61 return list.get(index); 62 } 63 64 public boolean remove(Object element) { 65 return list.remove(element); 66 } 67 68 public E set(int index, E element) { 69 return list.set(index, element); 70 } 71 72 public void add(int index, E element) { 73 list.add(index, element); 74 } 75 76 public E remove(int index) { 77 return list.remove(index); 78 } 79 80 public Iterator<E> iterator() { 81 return new Iterator<E>() { 82 Iterator<E> source = list.iterator(); 83 84 public boolean hasNext() { 85 return source.hasNext(); 86 } 87 88 public E next() { 89 return source.next(); 90 } 91 92 public void remove() { 93 source.remove(); 94 } 95 }; 96 } 97 98 public int size() { 99 return list.size(); 100 } 101 }