1/*
2 * Copyright (c) 2012, 2013, 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 */
23import java.util.ArrayList;
24import java.util.AbstractList;
25import java.util.Collection;
26import java.util.Iterator;
27import java.util.List;
28import 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 */
39public 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}
102