author | erikj |
Tue, 12 Sep 2017 19:03:39 +0200 | |
changeset 47216 | 71c04702a3d5 |
parent 42790 | nashorn/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/runtime/arrays/ByteBufferArrayData.java@edb30aa1a99b |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package jdk.nashorn.internal.runtime.arrays; |
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import static jdk.nashorn.internal.runtime.ECMAErrors.typeError; |
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import java.nio.ByteBuffer; |
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import jdk.nashorn.internal.objects.Global; |
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import jdk.nashorn.internal.runtime.PropertyDescriptor; |
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import jdk.nashorn.internal.runtime.ScriptRuntime; |
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/** |
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* Implementation of {@link ArrayData} that wraps a nio ByteBuffer |
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*/ |
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final class ByteBufferArrayData extends ArrayData { |
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private final ByteBuffer buf; |
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ByteBufferArrayData(final int length) { |
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super(length); |
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this.buf = ByteBuffer.allocateDirect(length); |
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} |
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/** |
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* Constructor |
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* |
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* @param buf ByteBuffer to create array data with. |
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*/ |
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ByteBufferArrayData(final ByteBuffer buf) { |
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super(buf.capacity()); |
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this.buf = buf; |
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} |
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/** |
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* Returns property descriptor for element at a given index |
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* |
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* @param global the global object |
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* @param index the index |
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* |
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* @return property descriptor for element |
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*/ |
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@Override |
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public PropertyDescriptor getDescriptor(final Global global, final int index) { |
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// make the index properties not configurable |
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return global.newDataDescriptor(getObject(index), false, true, true); |
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} |
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@Override |
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public ArrayData copy() { |
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throw unsupported("copy"); |
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} |
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@Override |
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public Object[] asObjectArray() { |
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throw unsupported("asObjectArray"); |
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} |
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@Override |
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public void setLength(final long length) { |
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throw new UnsupportedOperationException("setLength"); |
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} |
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@Override |
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public ArrayData shiftLeft(final int by) { |
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throw unsupported("shiftLeft"); |
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} |
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@Override |
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public ArrayData shiftRight(final int by) { |
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throw unsupported("shiftRight"); |
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} |
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@Override |
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public ArrayData ensure(final long safeIndex) { |
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if (safeIndex < buf.capacity()) { |
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return this; |
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} |
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throw unsupported("ensure"); |
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} |
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@Override |
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public ArrayData shrink(final long newLength) { |
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throw unsupported("shrink"); |
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} |
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@Override |
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public ArrayData set(final int index, final Object value, final boolean strict) { |
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if (value instanceof Number) { |
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buf.put(index, ((Number)value).byteValue()); |
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return this; |
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} |
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throw typeError("not.a.number", ScriptRuntime.safeToString(value)); |
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} |
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@Override |
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public ArrayData set(final int index, final int value, final boolean strict) { |
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buf.put(index, (byte)value); |
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return this; |
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} |
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@Override |
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public ArrayData set(final int index, final double value, final boolean strict) { |
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buf.put(index, (byte)value); |
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return this; |
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} |
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@Override |
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public int getInt(final int index) { |
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return 0x0ff & buf.get(index); |
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} |
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public double getDouble(final int index) { |
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return 0x0ff & buf.get(index); |
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} |
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public Object getObject(final int index) { |
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return 0x0ff & buf.get(index); |
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} |
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@Override |
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public boolean has(final int index) { |
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return index > -1 && index < buf.capacity(); |
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} |
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@Override |
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public boolean canDelete(final int index, final boolean strict) { |
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return false; |
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} |
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|
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@Override |
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public boolean canDelete(final long longIndex, final boolean strict) { |
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return false; |
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} |
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|
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@Override |
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public ArrayData delete(final int index) { |
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throw unsupported("delete"); |
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} |
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|
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@Override |
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public ArrayData delete(final long fromIndex, final long toIndex) { |
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throw unsupported("delete"); |
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} |
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|
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@Override |
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public ArrayData push(final boolean strict, final Object... items) { |
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throw unsupported("push"); |
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} |
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|
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@Override |
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public Object pop() { |
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throw unsupported("pop"); |
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} |
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|
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@Override |
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public ArrayData slice(final long from, final long to) { |
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throw unsupported("slice"); |
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} |
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|
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@Override |
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public ArrayData convert(final Class<?> type) { |
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throw unsupported("convert"); |
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} |
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|
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private static UnsupportedOperationException unsupported(final String method) { |
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return new UnsupportedOperationException(method); |
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} |
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} |