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Java example source code file (NoTypeArrayData.java)
The NoTypeArrayData.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.lang.reflect.Array; import jdk.nashorn.internal.runtime.ScriptRuntime; /** * Place holding array data for non-array objects. Activates a true array when * accessed. Should only exist as a singleton defined in ArrayData. */ final class NoTypeArrayData extends ArrayData { NoTypeArrayData() { super(0); } NoTypeArrayData(final long length) { super(length); } @Override public Object[] asObjectArray() { return new Object[0]; } @Override public ArrayData copy() { return new NoTypeArrayData(); } @Override public Object asArrayOfType(final Class<?> componentType) { return Array.newInstance(componentType, 0); } @Override public ArrayData convert(final Class<?> type) { final long length = length(); final ArrayData arrayData; if (type == Long.class) { arrayData = new LongArrayData(new long[ArrayData.nextSize((int)length)], (int)length); } else if (type == Double.class) { arrayData = new NumberArrayData(new double[ArrayData.nextSize((int)length)], (int)length); } else if (type == Integer.class) { arrayData = new IntArrayData(new int[ArrayData.nextSize((int)length)], (int)length); } else { assert !type.isPrimitive(); arrayData = new ObjectArrayData(new Object[ArrayData.nextSize((int)length)], (int)length); } return length == 0 ? arrayData : new DeletedRangeArrayFilter(arrayData, 0, length - 1); } @Override public void shiftLeft(final int by) { //empty } @Override public ArrayData shiftRight(final int by) { return this; } @Override public ArrayData ensure(final long safeIndex) { if (safeIndex >= SparseArrayData.MAX_DENSE_LENGTH) { return new SparseArrayData(this, safeIndex + 1); } // Don't trample the shared EMPTY_ARRAY. if (length() == 0) { return new NoTypeArrayData(Math.max(safeIndex + 1, length())); } setLength(Math.max(safeIndex + 1, length())); return this; } @Override public ArrayData shrink(final long newLength) { return this; } @Override public ArrayData set(final int index, final Object value, final boolean strict) { ArrayData newData; if (value instanceof Double) { newData = convert(Double.class); } else if (value instanceof Long) { newData = convert(Long.class); } else if (value instanceof Integer) { newData = convert(Integer.class); } else { assert !(value instanceof Number); newData = convert(value == null ? Object.class : value.getClass()); } return newData.set(index, value, strict); } @Override public ArrayData set(final int index, final int value, final boolean strict) { final ArrayData newData = convert(Integer.class); return newData.set(index, value, strict); } @Override public ArrayData set(final int index, final long value, final boolean strict) { final ArrayData newData = convert(Long.class); return newData.set(index, value, strict); } @Override public ArrayData set(final int index, final double value, final boolean strict) { final ArrayData newData = convert(Double.class); return newData.set(index, value, strict); } @Override public int getInt(final int index) { throw new ArrayIndexOutOfBoundsException(index); } @Override public long getLong(final int index) { throw new ArrayIndexOutOfBoundsException(index); } @Override public double getDouble(final int index) { throw new ArrayIndexOutOfBoundsException(index); } @Override public Object getObject(final int index) { throw new ArrayIndexOutOfBoundsException(index); } @Override public boolean has(final int index) { return false; } @Override public ArrayData delete(final int index) { return new DeletedRangeArrayFilter(this, index, index); } @Override public ArrayData delete(final long fromIndex, final long toIndex) { return new DeletedRangeArrayFilter(this, fromIndex, toIndex); } @Override public Object pop() { return ScriptRuntime.UNDEFINED; } @Override public ArrayData slice(final long from, final long to) { return this; } } Other Java examples (source code examples)Here is a short list of links related to this Java NoTypeArrayData.java source code file: |
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