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Java example source code file (NativeArrayBuffer.java)
The NativeArrayBuffer.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.objects; import java.util.Arrays; import jdk.nashorn.internal.objects.annotations.Attribute; import jdk.nashorn.internal.objects.annotations.Constructor; import jdk.nashorn.internal.objects.annotations.Function; import jdk.nashorn.internal.objects.annotations.Getter; import jdk.nashorn.internal.objects.annotations.ScriptClass; import jdk.nashorn.internal.runtime.JSType; import jdk.nashorn.internal.runtime.PropertyMap; import jdk.nashorn.internal.runtime.ScriptObject; import jdk.nashorn.internal.runtime.ScriptRuntime; @ScriptClass("ArrayBuffer") final class NativeArrayBuffer extends ScriptObject { private final byte[] buffer; // initialized by nasgen private static PropertyMap $nasgenmap$; static PropertyMap getInitialMap() { return $nasgenmap$; } @Constructor(arity = 1) public static Object constructor(final boolean newObj, final Object self, final Object... args) { if (args.length == 0) { throw new RuntimeException("missing length argument"); } return new NativeArrayBuffer(JSType.toInt32(args[0])); } protected NativeArrayBuffer(final byte[] byteArray, final Global global) { super(global.getArrayBufferPrototype(), global.getArrayBufferMap()); this.buffer = byteArray; } protected NativeArrayBuffer(final byte[] byteArray) { this(byteArray, Global.instance()); } protected NativeArrayBuffer(final int byteLength) { this(new byte[byteLength]); } protected NativeArrayBuffer(final NativeArrayBuffer other, final int begin, final int end) { this(Arrays.copyOfRange(other.buffer, begin, end)); } @Override public String getClassName() { return "ArrayBuffer"; } @Getter(attributes = Attribute.NOT_ENUMERABLE | Attribute.NOT_WRITABLE | Attribute.NOT_CONFIGURABLE) public static Object byteLength(final Object self) { return ((NativeArrayBuffer)self).buffer.length; } @Function(attributes = Attribute.NOT_ENUMERABLE) public static Object slice(final Object self, final Object begin0, final Object end0) { final NativeArrayBuffer arrayBuffer = (NativeArrayBuffer)self; int begin = JSType.toInt32(begin0); int end = end0 != ScriptRuntime.UNDEFINED ? JSType.toInt32(end0) : arrayBuffer.getByteLength(); begin = adjustIndex(begin, arrayBuffer.getByteLength()); end = adjustIndex(end, arrayBuffer.getByteLength()); return new NativeArrayBuffer((NativeArrayBuffer) self, begin, Math.max(end, begin)); } /** * If index is negative, it refers to an index from the end of the array, as * opposed to from the beginning. The index is clamped to the valid index * range for the array. * * @param index The index. * @param length The length of the array. * @return valid index index in the range [0, length). */ static int adjustIndex(final int index, final int length) { if (index < 0) { return clamp(index + length, length); } return clamp(index, length); } /** * Clamp index into the range [0, length). */ private static int clamp(final int index, final int length) { if (index < 0) { return 0; } else if (index > length) { return length; } return index; } public byte[] getByteArray() { return buffer; } public int getByteLength() { return buffer.length; } } Other Java examples (source code examples)Here is a short list of links related to this Java NativeArrayBuffer.java source code file: |
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