src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/runtime/arrays/ReverseScriptArrayIterator.java
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/runtime/arrays/ReverseScriptArrayIterator.java Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation. Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code 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
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.nashorn.internal.runtime.arrays;
+
+import jdk.nashorn.internal.runtime.ScriptObject;
+
+/**
+ * Reverse iterator over a NativeArray
+ */
+final class ReverseScriptArrayIterator extends ScriptArrayIterator {
+
+ /**
+ * Constructor
+ * @param array array to iterate over
+ * @param includeUndefined should undefined elements be included in iteration
+ */
+ public ReverseScriptArrayIterator(final ScriptObject array, final boolean includeUndefined) {
+ super(array, includeUndefined);
+ this.index = array.getArray().length() - 1;
+ }
+
+ @Override
+ public boolean isReverse() {
+ return true;
+ }
+
+ @Override
+ protected boolean indexInArray() {
+ return index >= 0;
+ }
+
+ @Override
+ protected long bumpIndex() {
+ return index--;
+ }
+}