--- old/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/runtime/arrays/UndefinedArrayFilter.java	2020-04-15 18:50:44.000000000 +0530
+++ /dev/null	2020-04-15 18:50:44.000000000 +0530
@@ -1,217 +0,0 @@
-/*
- * 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.ScriptRuntime.UNDEFINED;
-import java.lang.reflect.Array;
-import jdk.nashorn.internal.runtime.BitVector;
-import jdk.nashorn.internal.runtime.UnwarrantedOptimismException;
-
-/**
- * This filter handles the presence of undefined array elements.
- */
-final class UndefinedArrayFilter extends ArrayFilter {
-    /** Bit vector tracking undefined slots. */
-    private final BitVector undefined;
-
-    UndefinedArrayFilter(final ArrayData underlying) {
-        super(underlying);
-        this.undefined = new BitVector(underlying.length());
-    }
-
-    @Override
-    public ArrayData copy() {
-        final UndefinedArrayFilter copy = new UndefinedArrayFilter(underlying.copy());
-        copy.getUndefined().copy(undefined);
-        return copy;
-    }
-
-    @Override
-    public Object[] asObjectArray() {
-        final Object[] value = super.asObjectArray();
-
-        for (int i = 0; i < value.length; i++) {
-            if (undefined.isSet(i)) {
-                value[i] = UNDEFINED;
-            }
-        }
-
-        return value;
-    }
-
-    @Override
-    public Object asArrayOfType(final Class<?> componentType) {
-        final Object value = super.asArrayOfType(componentType);
-        final Object undefValue = convertUndefinedValue(componentType);
-        final int l = Array.getLength(value);
-        for (int i = 0; i < l; i++) {
-            if (undefined.isSet(i)) {
-                Array.set(value, i,undefValue);
-            }
-        }
-
-        return value;
-    }
-
-    @Override
-    public ArrayData shiftLeft(final int by) {
-        super.shiftLeft(by);
-        undefined.shiftLeft(by, length());
-        return this;
-    }
-
-    @Override
-    public ArrayData shiftRight(final int by) {
-        super.shiftRight(by);
-        undefined.shiftRight(by, length());
-        return this;
-    }
-
-    @Override
-    public ArrayData ensure(final long safeIndex) {
-        if (safeIndex >= SparseArrayData.MAX_DENSE_LENGTH && safeIndex >= length()) {
-            return new SparseArrayData(this, safeIndex + 1);
-        }
-
-        super.ensure(safeIndex);
-        undefined.resize(length());
-
-        return this;
-    }
-
-    @Override
-    public ArrayData shrink(final long newLength) {
-        super.shrink(newLength);
-        undefined.resize(length());
-        return this;
-    }
-
-    @Override
-    public ArrayData set(final int index, final Object value, final boolean strict) {
-        undefined.clear(index);
-
-        if (value == UNDEFINED) {
-            undefined.set(index);
-            return this;
-        }
-
-        return super.set(index, value, strict);
-    }
-
-    @Override
-    public ArrayData set(final int index, final int value, final boolean strict) {
-        undefined.clear(index);
-
-        return super.set(index, value, strict);
-    }
-
-    @Override
-    public ArrayData set(final int index, final double value, final boolean strict) {
-        undefined.clear(index);
-
-        return super.set(index, value, strict);
-    }
-
-    @Override
-    public int getInt(final int index) {
-        if (undefined.isSet(index)) {
-            return 0;
-        }
-
-        return super.getInt(index);
-    }
-
-    @Override
-    public int getIntOptimistic(final int index, final int programPoint) {
-        if (undefined.isSet(index)) {
-            throw new UnwarrantedOptimismException(UNDEFINED, programPoint);
-        }
-
-        return super.getIntOptimistic(index, programPoint);
-    }
-
-    @Override
-    public double getDouble(final int index) {
-        if (undefined.isSet(index)) {
-            return Double.NaN;
-        }
-
-        return super.getDouble(index);
-    }
-
-    @Override
-    public double getDoubleOptimistic(final int index, final int programPoint) {
-        if (undefined.isSet(index)) {
-            throw new UnwarrantedOptimismException(UNDEFINED, programPoint);
-        }
-
-        return super.getDoubleOptimistic(index, programPoint);
-    }
-
-    @Override
-    public Object getObject(final int index) {
-        if (undefined.isSet(index)) {
-            return UNDEFINED;
-        }
-
-        return super.getObject(index);
-    }
-
-    @Override
-    public ArrayData delete(final int index) {
-        undefined.clear(index);
-
-        return super.delete(index);
-    }
-
-    @Override
-    public Object pop() {
-        final long index = length() - 1;
-
-        if (super.has((int)index)) {
-            final boolean isUndefined = undefined.isSet(index);
-            final Object value = super.pop();
-
-            return isUndefined ? UNDEFINED : value;
-        }
-
-        return super.pop();
-    }
-
-    @Override
-    public ArrayData slice(final long from, final long to) {
-        final ArrayData newArray = underlying.slice(from, to);
-        final UndefinedArrayFilter newFilter = new UndefinedArrayFilter(newArray);
-        newFilter.getUndefined().copy(undefined);
-        newFilter.getUndefined().shiftLeft(from, newFilter.length());
-
-        return newFilter;
-    }
-
-    private BitVector getUndefined() {
-        return undefined;
-    }
-}