tikhomirov@596: /*
tikhomirov@596:  * Copyright (c) 2013 TMate Software Ltd
tikhomirov@596:  *  
tikhomirov@596:  * This program is free software; you can redistribute it and/or modify
tikhomirov@596:  * it under the terms of the GNU General Public License as published by
tikhomirov@596:  * the Free Software Foundation; version 2 of the License.
tikhomirov@596:  *
tikhomirov@596:  * This program is distributed in the hope that it will be useful,
tikhomirov@596:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
tikhomirov@596:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
tikhomirov@596:  * GNU General Public License for more details.
tikhomirov@596:  *
tikhomirov@596:  * For information on how to redistribute this software under
tikhomirov@596:  * the terms of a license other than GNU General Public License
tikhomirov@596:  * contact TMate Software at support@hg4j.com
tikhomirov@596:  */
tikhomirov@596: package org.tmatesoft.hg.internal;
tikhomirov@596: 
tikhomirov@596: import java.util.Iterator;
tikhomirov@596: import java.util.List;
tikhomirov@596: import java.util.ListIterator;
tikhomirov@596: 
tikhomirov@596: /**
tikhomirov@596:  * @author Artem Tikhomirov
tikhomirov@596:  * @author TMate Software Ltd.
tikhomirov@596:  */
tikhomirov@596: public class ReverseIterator<E> implements Iterator<E> {
tikhomirov@596: 	private final ListIterator<E> listIterator;
tikhomirov@596: 	
tikhomirov@596: 	public ReverseIterator(List<E> list) {
tikhomirov@596: 		listIterator = list.listIterator(list.size());
tikhomirov@596: 	}
tikhomirov@596: 
tikhomirov@596: 	public boolean hasNext() {
tikhomirov@596: 		return listIterator.hasPrevious();
tikhomirov@596: 	}
tikhomirov@596: 	public E next() {
tikhomirov@596: 		return listIterator.previous();
tikhomirov@596: 	}
tikhomirov@596: 	public void remove() {
tikhomirov@596: 		listIterator.remove();
tikhomirov@596: 	}
tikhomirov@596: 
tikhomirov@596: 	public static <T> Iterable<T> reversed(final List<T> list) {
tikhomirov@596: 		return new Iterable<T>() {
tikhomirov@596: 
tikhomirov@596: 			public Iterator<T> iterator() {
tikhomirov@596: 				return new ReverseIterator<T>(list);
tikhomirov@596: 			}
tikhomirov@596: 		};
tikhomirov@596: 	}
tikhomirov@596: }