JavaListIterator.java revision 953:221a84ef44c0 
1/*
2 * Copyright (c) 2010, 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.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26package jdk.nashorn.internal.runtime.arrays;
27
28import java.util.List;
29
30/**
31  * Iterator over a Java List.
32 */
33class JavaListIterator extends ArrayLikeIterator<Object> {
34
35    /** {@link java.util.List} to iterate over */
36    protected final List<?> list;
37
38    /** length of array */
39    protected final long length;
40
41    /**
42     * Constructor
43     * @param list list to iterate over
44     * @param includeUndefined should undefined elements be included in iteration
45     */
46    protected JavaListIterator(final List<?> list, final boolean includeUndefined) {
47        super(includeUndefined);
48        this.list = list;
49        this.length = list.size();
50    }
51
52    /**
53     * Is the current index still inside the array
54     * @return true if inside the array
55     */
56    protected boolean indexInArray() {
57        return index < length;
58    }
59
60    @Override
61    public Object next() {
62        return list.get((int)bumpIndex());
63    }
64
65    @Override
66    public long getLength() {
67        return length;
68    }
69
70    @Override
71    public boolean hasNext() {
72        return indexInArray();
73    }
74
75    @Override
76    public void remove() {
77        list.remove(index);
78    }
79}
80