| /* |
| * Copyright (c) 2014, 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.ECMAErrors.typeError; |
| |
| import java.nio.ByteBuffer; |
| import jdk.nashorn.internal.objects.Global; |
| import jdk.nashorn.internal.runtime.PropertyDescriptor; |
| import jdk.nashorn.internal.runtime.ScriptRuntime; |
| |
| /** |
| * Implementation of {@link ArrayData} that wraps a nio ByteBuffer |
| */ |
| final class ByteBufferArrayData extends ArrayData { |
| private final ByteBuffer buf; |
| |
| ByteBufferArrayData(final int length) { |
| super(length); |
| this.buf = ByteBuffer.allocateDirect(length); |
| } |
| |
| /** |
| * Constructor |
| * |
| * @param buf ByteBuffer to create array data with. |
| */ |
| ByteBufferArrayData(final ByteBuffer buf) { |
| super(buf.capacity()); |
| this.buf = buf; |
| } |
| |
| /** |
| * Returns property descriptor for element at a given index |
| * |
| * @param global the global object |
| * @param index the index |
| * |
| * @return property descriptor for element |
| */ |
| @Override |
| public PropertyDescriptor getDescriptor(final Global global, final int index) { |
| // make the index properties not configurable |
| return global.newDataDescriptor(getObject(index), false, true, true); |
| } |
| |
| @Override |
| public ArrayData copy() { |
| throw unsupported("copy"); |
| } |
| |
| @Override |
| public Object[] asObjectArray() { |
| throw unsupported("asObjectArray"); |
| } |
| |
| @Override |
| public void setLength(final long length) { |
| throw new UnsupportedOperationException("setLength"); |
| } |
| |
| @Override |
| public ArrayData shiftLeft(final int by) { |
| throw unsupported("shiftLeft"); |
| } |
| |
| @Override |
| public ArrayData shiftRight(final int by) { |
| throw unsupported("shiftRight"); |
| } |
| |
| @Override |
| public ArrayData ensure(final long safeIndex) { |
| if (safeIndex < buf.capacity()) { |
| return this; |
| } |
| |
| throw unsupported("ensure"); |
| } |
| |
| @Override |
| public ArrayData shrink(final long newLength) { |
| throw unsupported("shrink"); |
| } |
| |
| @Override |
| public ArrayData set(final int index, final Object value, final boolean strict) { |
| if (value instanceof Number) { |
| buf.put(index, ((Number)value).byteValue()); |
| return this; |
| } |
| |
| throw typeError("not.a.number", ScriptRuntime.safeToString(value)); |
| } |
| |
| @Override |
| public ArrayData set(final int index, final int value, final boolean strict) { |
| buf.put(index, (byte)value); |
| return this; |
| } |
| |
| @Override |
| public ArrayData set(final int index, final double value, final boolean strict) { |
| buf.put(index, (byte)value); |
| return this; |
| } |
| |
| @Override |
| public int getInt(final int index) { |
| return 0x0ff & buf.get(index); |
| } |
| |
| @Override |
| public double getDouble(final int index) { |
| return 0x0ff & buf.get(index); |
| } |
| |
| @Override |
| public Object getObject(final int index) { |
| return 0x0ff & buf.get(index); |
| } |
| |
| @Override |
| public boolean has(final int index) { |
| return index > -1 && index < buf.capacity(); |
| } |
| |
| @Override |
| public boolean canDelete(final int index, final boolean strict) { |
| return false; |
| } |
| |
| @Override |
| public boolean canDelete(final long longIndex, final boolean strict) { |
| return false; |
| } |
| |
| @Override |
| public ArrayData delete(final int index) { |
| throw unsupported("delete"); |
| } |
| |
| @Override |
| public ArrayData delete(final long fromIndex, final long toIndex) { |
| throw unsupported("delete"); |
| } |
| |
| @Override |
| public ArrayData push(final boolean strict, final Object... items) { |
| throw unsupported("push"); |
| } |
| |
| @Override |
| public Object pop() { |
| throw unsupported("pop"); |
| } |
| |
| @Override |
| public ArrayData slice(final long from, final long to) { |
| throw unsupported("slice"); |
| } |
| |
| @Override |
| public ArrayData convert(final Class<?> type) { |
| throw unsupported("convert"); |
| } |
| |
| private static UnsupportedOperationException unsupported(final String method) { |
| return new UnsupportedOperationException(method); |
| } |
| } |