1 /*
   2  * Copyright (c) 2014, 2018, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package jdk.nashorn.internal.runtime.arrays;
  27 
  28 import static jdk.nashorn.internal.runtime.ECMAErrors.typeError;
  29 import jdk.nashorn.internal.objects.Global;
  30 import jdk.nashorn.internal.runtime.ScriptRuntime;
  31 
  32 /**
  33  * Filter class that wrap arrays that have been tagged non extensible
  34  */
  35 final class NonExtensibleArrayFilter extends ArrayFilter {
  36 
  37     /**
  38      * Constructor
  39      * @param underlying array
  40      */
  41     NonExtensibleArrayFilter(final ArrayData underlying) {
  42         super(underlying);
  43     }
  44 
  45     @Override
  46     public ArrayData copy() {
  47         return new NonExtensibleArrayFilter(underlying.copy());
  48     }
  49 
  50     @Override
  51     public ArrayData slice(final long from, final long to) {
  52         return new NonExtensibleArrayFilter(underlying.slice(from, to));
  53     }
  54 
  55     private ArrayData extensionCheck(final boolean strict, final int index) {
  56         if (!strict) {
  57             return this;
  58         }
  59         throw typeError(Global.instance(), "object.non.extensible", String.valueOf(index), ScriptRuntime.safeToString(this));
  60     }
  61 
  62     @Override
  63     public ArrayData set(final int index, final Object value, final boolean strict) {
  64         if (has(index)) {
  65             return underlying.set(index, value, strict);
  66         }
  67         return extensionCheck(strict, index);
  68     }
  69 
  70     @Override
  71     public ArrayData set(final int index, final int value, final boolean strict) {
  72         if (has(index)) {
  73             return underlying.set(index, value, strict);
  74         }
  75         return extensionCheck(strict, index);
  76     }
  77 
  78     @Override
  79     public ArrayData set(final int index, final double value, final boolean strict) {
  80         if (has(index)) {
  81             return underlying.set(index, value, strict);
  82         }
  83         return extensionCheck(strict, index);
  84     }
  85 }