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>
date Thu, 02 May 2013 19:23:53 +0200
parents
children
line wrap: on
line diff
--- /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