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Java example source code file (ObjectArrayData.java)
The ObjectArrayData.java Java example source code/* * 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 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 ArrayData { /** * 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 ArrayData copy() { return new ObjectArrayData(array.clone(), (int) length()); } @Override public Object[] asObjectArray() { return Arrays.copyOf(array, (int) length()); } @Override public ArrayData 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 && safeIndex >= array.length) { return new SparseArrayData(this, safeIndex + 1); } int newLength = array.length; while (newLength <= safeIndex) { newLength = ArrayData.nextSize(newLength); } if (array.length <= safeIndex) { array = Arrays.copyOf(array, newLength); Arrays.fill(array, (int) length(), newLength, ScriptRuntime.UNDEFINED); } 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 long 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) { Arrays.fill(array, (int)Math.max(lo, 0L), (int)Math.min(hi, Integer.MAX_VALUE), ScriptRuntime.EMPTY); return this; } @Override public int getInt(final int index) { return JSType.toInt32(array[index]); } @Override public long getLong(final int index) { return JSType.toLong(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 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 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; } } Other Java examples (source code examples)Here is a short list of links related to this Java ObjectArrayData.java source code file: |
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