| /* |
| * 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 void shiftLeft(final int by) { |
| System.arraycopy(array, by, array, 0, array.length - by); |
| } |
| |
| @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 long fastPush(final int arg) { |
| return fastPush((Object)arg); |
| } |
| |
| @Override |
| public long fastPush(final long arg) { |
| return fastPush((Object)arg); |
| } |
| |
| @Override |
| public long fastPush(final double arg) { |
| return fastPush((Object)arg); |
| } |
| |
| @Override |
| public long 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())); |
| } |
| } |