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comparison src/org/tmatesoft/hg/internal/ReverseIterator.java @ 596:43cfa08ff3fd

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HgBlameFacility refactoring: extract code to build file history that spans renames
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Thu, 02 May 2013 19:23:53 +0200
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595:92c3ad9c2a51 596:43cfa08ff3fd
1 /*
2 * Copyright (c) 2013 TMate Software Ltd
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; version 2 of the License.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
13 * For information on how to redistribute this software under
14 * the terms of a license other than GNU General Public License
15 * contact TMate Software at support@hg4j.com
16 */
17 package org.tmatesoft.hg.internal;
18
19 import java.util.Iterator;
20 import java.util.List;
21 import java.util.ListIterator;
22
23 /**
24 * @author Artem Tikhomirov
25 * @author TMate Software Ltd.
26 */
27 public class ReverseIterator<E> implements Iterator<E> {
28 private final ListIterator<E> listIterator;
29
30 public ReverseIterator(List<E> list) {
31 listIterator = list.listIterator(list.size());
32 }
33
34 public boolean hasNext() {
35 return listIterator.hasPrevious();
36 }
37 public E next() {
38 return listIterator.previous();
39 }
40 public void remove() {
41 listIterator.remove();
42 }
43
44 public static <T> Iterable<T> reversed(final List<T> list) {
45 return new Iterable<T>() {
46
47 public Iterator<T> iterator() {
48 return new ReverseIterator<T>(list);
49 }
50 };
51 }
52 }