--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/runtime/arrays/SealedArrayFilter.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,68 @@
+/*
+ * 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 static jdk.nashorn.internal.runtime.ECMAErrors.typeError;
+
+import jdk.nashorn.internal.objects.Global;
+import jdk.nashorn.internal.runtime.PropertyDescriptor;
+
+/**
+ * ArrayData after the array has been sealed by Object.seal call.
+ */
+class SealedArrayFilter extends ArrayFilter {
+    SealedArrayFilter(final ArrayData underlying) {
+        super(underlying);
+    }
+
+    @Override
+    public ArrayData copy() {
+        return new SealedArrayFilter(underlying.copy());
+    }
+
+    @Override
+    public ArrayData slice(final long from, final long to) {
+        return getUnderlying().slice(from, to);
+    }
+
+    @Override
+    public boolean canDelete(final int index, final boolean strict) {
+        return canDelete(ArrayIndex.toLongIndex(index), strict);
+    }
+
+    @Override
+    public boolean canDelete(final long longIndex, final boolean strict) {
+        if (strict) {
+            throw typeError("cant.delete.property", Long.toString(longIndex), "sealed array");
+        }
+        return false;
+    }
+
+    @Override
+    public PropertyDescriptor getDescriptor(final Global global, final int index) {
+        return global.newDataDescriptor(getObject(index), false, true, true);
+    }
+}