--- old/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/runtime/arrays/ObjectArrayData.java 2020-04-15 18:50:37.000000000 +0530 +++ /dev/null 2020-04-15 18:50:37.000000000 +0530 @@ -1,360 +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.codegen.CompilerConstants.specialCall; -import java.lang.invoke.MethodHandle; -import java.lang.invoke.MethodHandles; -import java.util.Arrays; -import jdk.nashorn.internal.runtime.JSType; -import jdk.nashorn.internal.runtime.ScriptRuntime; - -/** - * Implementation of {@link ArrayData} as soon as an Object has been - * written to the array - */ -final class ObjectArrayData extends ContinuousArrayData implements AnyElements { - - /** - * The wrapped array - */ - private Object[] array; - - /** - * Constructor - * @param array an int array - * @param length a length, not necessarily array.length - */ - ObjectArrayData(final Object[] array, final int length) { - super(length); - assert array.length >= length; - this.array = array; - } - - @Override - public final Class getElementType() { - return Object.class; - } - - @Override - public final Class getBoxedElementType() { - return getElementType(); - } - - @Override - public final int getElementWeight() { - return 4; - } - - @Override - public final ContinuousArrayData widest(final ContinuousArrayData otherData) { - return otherData instanceof NumericElements ? this : otherData; - } - - @Override - public ObjectArrayData copy() { - return new ObjectArrayData(array.clone(), (int)length()); - } - - @Override - public Object[] asObjectArray() { - return array.length == length() ? array.clone() : asObjectArrayCopy(); - } - - private Object[] asObjectArrayCopy() { - final long len = length(); - assert len <= Integer.MAX_VALUE; - final Object[] copy = new Object[(int)len]; - System.arraycopy(array, 0, copy, 0, (int)len); - return copy; - } - - @Override - public ObjectArrayData convert(final Class type) { - return this; - } - - @Override - public ArrayData shiftLeft(final int by) { - if (by >= length()) { - shrink(0); - } else { - System.arraycopy(array, by, array, 0, array.length - by); - } - setLength(Math.max(0, length() - by)); - return this; - } - - @Override - public ArrayData shiftRight(final int by) { - final ArrayData newData = ensure(by + length() - 1); - if (newData != this) { - newData.shiftRight(by); - return newData; - } - System.arraycopy(array, 0, array, by, array.length - by); - return this; - } - - @Override - public ArrayData ensure(final long safeIndex) { - if (safeIndex >= SparseArrayData.MAX_DENSE_LENGTH) { - return new SparseArrayData(this, safeIndex + 1); - } - final int alen = array.length; - if (safeIndex >= alen) { - final int newLength = ArrayData.nextSize((int)safeIndex); - array = Arrays.copyOf(array, newLength); //fill with undefined or OK? TODO - } - if (safeIndex >= length()) { - setLength(safeIndex + 1); - } - return this; - } - - @Override - public ArrayData shrink(final long newLength) { - Arrays.fill(array, (int) newLength, array.length, ScriptRuntime.UNDEFINED); - return this; - } - - @Override - public ArrayData set(final int index, final Object value, final boolean strict) { - array[index] = value; - setLength(Math.max(index + 1, length())); - return this; - } - - @Override - public ArrayData set(final int index, final int value, final boolean strict) { - array[index] = value; - setLength(Math.max(index + 1, length())); - return this; - } - - @Override - public ArrayData set(final int index, final double value, final boolean strict) { - array[index] = value; - setLength(Math.max(index + 1, length())); - return this; - } - - @Override - public ArrayData setEmpty(final int index) { - array[index] = ScriptRuntime.EMPTY; - return this; - } - - @Override - public ArrayData setEmpty(final long lo, final long hi) { - // hi parameter is inclusive, but Arrays.fill toIndex parameter is exclusive - Arrays.fill(array, (int)Math.max(lo, 0L), (int)Math.min(hi + 1, Integer.MAX_VALUE), ScriptRuntime.EMPTY); - return this; - } - - private static final MethodHandle HAS_GET_ELEM = specialCall(MethodHandles.lookup(), ObjectArrayData.class, "getElem", Object.class, int.class).methodHandle(); - private static final MethodHandle SET_ELEM = specialCall(MethodHandles.lookup(), ObjectArrayData.class, "setElem", void.class, int.class, Object.class).methodHandle(); - - @SuppressWarnings("unused") - private Object getElem(final int index) { - if (has(index)) { - return array[index]; - } - throw new ClassCastException(); - } - - @SuppressWarnings("unused") - private void setElem(final int index, final Object elem) { - if (hasRoomFor(index)) { - array[index] = elem; - return; - } - throw new ClassCastException(); - } - - @Override - public MethodHandle getElementGetter(final Class returnType, final int programPoint) { - if (returnType.isPrimitive()) { - return null; - } - return getContinuousElementGetter(HAS_GET_ELEM, returnType, programPoint); - } - - @Override - public MethodHandle getElementSetter(final Class elementType) { - return getContinuousElementSetter(SET_ELEM, Object.class); - } - - - @Override - public int getInt(final int index) { - return JSType.toInt32(array[index]); - } - - @Override - public double getDouble(final int index) { - return JSType.toNumber(array[index]); - } - - @Override - public Object getObject(final int index) { - return array[index]; - } - - @Override - public boolean has(final int index) { - return 0 <= index && index < length(); - } - - @Override - public ArrayData delete(final int index) { - setEmpty(index); - return new DeletedRangeArrayFilter(this, index, index); - } - - @Override - public ArrayData delete(final long fromIndex, final long toIndex) { - setEmpty(fromIndex, toIndex); - return new DeletedRangeArrayFilter(this, fromIndex, toIndex); - } - - @Override - public double fastPush(final int arg) { - return fastPush((Object)arg); - } - - @Override - public double fastPush(final long arg) { - return fastPush((Object)arg); - } - - @Override - public double fastPush(final double arg) { - return fastPush((Object)arg); - } - - @Override - public double fastPush(final Object arg) { - final int len = (int)length(); - if (len == array.length) { - array = Arrays.copyOf(array, nextSize(len)); - } - array[len] = arg; - return increaseLength(); - } - - @Override - public Object fastPopObject() { - if (length() == 0) { - return ScriptRuntime.UNDEFINED; - } - final int newLength = (int)decreaseLength(); - final Object elem = array[newLength]; - array[newLength] = ScriptRuntime.EMPTY; - return elem; - } - - @Override - public Object pop() { - if (length() == 0) { - return ScriptRuntime.UNDEFINED; - } - - final int newLength = (int)length() - 1; - final Object elem = array[newLength]; - setEmpty(newLength); - setLength(newLength); - return elem; - } - - @Override - public ArrayData slice(final long from, final long to) { - final long start = from < 0 ? from + length() : from; - final long newLength = to - start; - return new ObjectArrayData(Arrays.copyOfRange(array, (int)from, (int)to), (int)newLength); - } - - @Override - public ArrayData push(final boolean strict, final Object item) { - final long len = length(); - final ArrayData newData = ensure(len); - if (newData == this) { - array[(int)len] = item; - return this; - } - return newData.set((int)len, item, strict); - } - - @Override - public ArrayData fastSplice(final int start, final int removed, final int added) throws UnsupportedOperationException { - final long oldLength = length(); - final long newLength = oldLength - removed + added; - if (newLength > SparseArrayData.MAX_DENSE_LENGTH && newLength > array.length) { - throw new UnsupportedOperationException(); - } - final ArrayData returnValue = removed == 0 ? - EMPTY_ARRAY : new ObjectArrayData(Arrays.copyOfRange(array, start, start + removed), removed); - - if (newLength != oldLength) { - final Object[] newArray; - - if (newLength > array.length) { - newArray = new Object[ArrayData.nextSize((int)newLength)]; - System.arraycopy(array, 0, newArray, 0, start); - } else { - newArray = array; - } - - System.arraycopy(array, start + removed, newArray, start + added, (int)(oldLength - start - removed)); - array = newArray; - setLength(newLength); - } - - return returnValue; - } - - @Override - public ContinuousArrayData fastConcat(final ContinuousArrayData otherData) { - final int otherLength = (int)otherData.length(); - final int thisLength = (int)length(); - assert otherLength > 0 && thisLength > 0; - - final Object[] otherArray = ((ObjectArrayData)otherData).array; - final int newLength = otherLength + thisLength; - final Object[] newArray = new Object[ArrayData.alignUp(newLength)]; - - System.arraycopy(array, 0, newArray, 0, thisLength); - System.arraycopy(otherArray, 0, newArray, thisLength, otherLength); - - return new ObjectArrayData(newArray, newLength); - } - - @Override - public String toString() { - assert length() <= array.length : length() + " > " + array.length; - return getClass().getSimpleName() + ':' + Arrays.toString(Arrays.copyOf(array, (int)length())); - } -}