Mercurial > hg4j
diff src/org/tmatesoft/hg/internal/ReverseIterator.java @ 596:43cfa08ff3fd
HgBlameFacility refactoring: extract code to build file history that spans renames
author | Artem Tikhomirov <tikhomirov.artem@gmail.com> |
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date | Thu, 02 May 2013 19:23:53 +0200 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/org/tmatesoft/hg/internal/ReverseIterator.java Thu May 02 19:23:53 2013 +0200 @@ -0,0 +1,52 @@ +/* + * Copyright (c) 2013 TMate Software Ltd + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * For information on how to redistribute this software under + * the terms of a license other than GNU General Public License + * contact TMate Software at support@hg4j.com + */ +package org.tmatesoft.hg.internal; + +import java.util.Iterator; +import java.util.List; +import java.util.ListIterator; + +/** + * @author Artem Tikhomirov + * @author TMate Software Ltd. + */ +public class ReverseIterator<E> implements Iterator<E> { + private final ListIterator<E> listIterator; + + public ReverseIterator(List<E> list) { + listIterator = list.listIterator(list.size()); + } + + public boolean hasNext() { + return listIterator.hasPrevious(); + } + public E next() { + return listIterator.previous(); + } + public void remove() { + listIterator.remove(); + } + + public static <T> Iterable<T> reversed(final List<T> list) { + return new Iterable<T>() { + + public Iterator<T> iterator() { + return new ReverseIterator<T>(list); + } + }; + } +} \ No newline at end of file