/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
package org.mozilla.javascript.typedarrays;
import org.mozilla.javascript.Context;
import org.mozilla.javascript.IdFunctionObject;
import org.mozilla.javascript.Scriptable;
import org.mozilla.javascript.Undefined;
/**
* An array view that stores 8-bit quantities and implements the JavaScript "Int8Array" interface.
* It also implements List<Byte> for direct manipulation in Java.
*/
public class NativeInt8Array
extends NativeTypedArrayView<Byte>
{
private static final long serialVersionUID = -3349419704390398895L;
private static final String CLASS_NAME = "Int8Array";
public NativeInt8Array()
{
}
public NativeInt8Array(NativeArrayBuffer ab, int off, int len)
{
super(ab, off, len, len);
}
public NativeInt8Array(int len)
{
this(new NativeArrayBuffer(len), 0, len);
}
@Override
public String getClassName()
{
return CLASS_NAME;
}
public static void init(Context cx, Scriptable scope, boolean sealed)
{
NativeInt8Array a = new NativeInt8Array();
a.exportAsJSClass(MAX_PROTOTYPE_ID, scope, sealed);
}
@Override
protected NativeTypedArrayView construct(NativeArrayBuffer ab, int off, int len)
{
return new NativeInt8Array(ab, off, len);
}
@Override
public int getBytesPerElement()
{
return 1;
}
@Override
protected NativeTypedArrayView realThis(Scriptable thisObj, IdFunctionObject f)
{
if (!(thisObj instanceof NativeInt8Array)) {
throw incompatibleCallError(f);
}
return (NativeInt8Array)thisObj;
}
@Override
protected Object js_get(int index)
{
if (checkIndex(index)) {
return Undefined.instance;
}
return ByteIo.readInt8(arrayBuffer.buffer, index + offset);
}
@Override
protected Object js_set(int index, Object c)
{
if (checkIndex(index)) {
return Undefined.instance;
}
int val = Conversions.toInt8(c);
ByteIo.writeInt8(arrayBuffer.buffer, index + offset, val);
return null;
}
// List implementation (much of it handled by the superclass)
@Override
public Byte get(int i)
{
if (checkIndex(i)) {
throw new IndexOutOfBoundsException();
}
return (Byte)js_get(i);
}
@Override
public Byte set(int i, Byte aByte)
{
if (checkIndex(i)) {
throw new IndexOutOfBoundsException();
}
return (Byte)js_set(i, aByte);
}
}