Package org.mozilla.javascript.typedarrays

Class NativeArrayBuffer

java.lang.Object

org.mozilla.javascript.ScriptableObject

org.mozilla.javascript.IdScriptableObject

org.mozilla.javascript.typedarrays.NativeArrayBuffer

All Implemented Interfaces:

Serializable, ConstProperties, DebuggableObject, IdFunctionCall, Scriptable

public class NativeArrayBuffer
extends IdScriptableObject

A NativeArrayBuffer is the backing buffer for a typed array. Used inside JavaScript code, it implements the ArrayBuffer interface. Used directly from Java, it simply holds a byte array.

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static final String	CLASS_NAME
static final NativeArrayBuffer	EMPTY_BUFFER

Fields inherited from class org.mozilla.javascript.ScriptableObject

CONST, DONTENUM, EMPTY, PERMANENT, READONLY, UNINITIALIZED_CONST

Fields inherited from interface org.mozilla.javascript.Scriptable

NOT_FOUND

Constructor Summary

Constructors

Constructor	Description
NativeArrayBuffer()	Create an empty buffer.
NativeArrayBuffer(int len)	Create a buffer of the specified length in bytes.

Method Summary

Modifier and Type	Method	Description
Object	execIdCall(IdFunctionObject f, Context cx, Scriptable scope, Scriptable thisObj, Object[] args)	'thisObj' will be null if invoked as constructor, in which case instance of Scriptable should be returned.
byte[]	getBuffer()	Return the actual bytes that back the buffer.
String	getClassName()	Return the name of the class.
int	getLength()	Get the number of bytes in the buffer.
static void	init(Context cx, Scriptable scope, boolean sealed)
NativeArrayBuffer	slice(int s, int e)	Return a new buffer that represents a slice of this buffer's content, starting at position "start" and ending at position "end".

Methods inherited from class org.mozilla.javascript.IdScriptableObject

activatePrototypeMap, defineOwnProperty, delete, exportAsJSClass, get, getAttributes, has, hasPrototypeMap, initPrototypeConstructor, initPrototypeMethod, initPrototypeValue, put, setAttributes

Methods inherited from class org.mozilla.javascript.ScriptableObject

associateValue, avoidObjectDetection, callMethod, callMethod, defineClass, defineClass, defineClass, defineConst, defineConstProperty, defineFunctionProperties, defineOwnProperties, defineProperty, defineProperty, defineProperty, defineProperty, delete, deleteProperty, deleteProperty, get, get, getAllIds, getArrayPrototype, getAssociatedValue, getAttributes, getAttributes, getAttributes, getClassPrototype, getDefaultValue, getDefaultValue, getExternalArrayData, getExternalArrayLength, getFunctionPrototype, getGetterOrSetter, getIds, getObjectPrototype, getParentScope, getProperty, getProperty, getPropertyIds, getPrototype, getTopLevelScope, getTopScopeValue, getTypedProperty, getTypedProperty, getTypeOf, has, hasInstance, hasProperty, hasProperty, isConst, isEmpty, isExtensible, isSealed, preventExtensions, put, putConst, putConstProperty, putProperty, putProperty, redefineProperty, sealObject, setAttributes, setAttributes, setAttributes, setExternalArrayData, setGetterOrSetter, setParentScope, setPrototype, size

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

CLASS_NAME

public static final String CLASS_NAME

See Also:

• Constant Field Values

EMPTY_BUFFER

public static final NativeArrayBuffer EMPTY_BUFFER

Constructor Details

NativeArrayBuffer

public NativeArrayBuffer()

Create an empty buffer.

NativeArrayBuffer

public NativeArrayBuffer(int len)

Create a buffer of the specified length in bytes.

Method Details

getClassName

public String getClassName()

Description copied from class: ScriptableObject

Return the name of the class. This is typically the same name as the constructor. Classes extending ScriptableObject must implement this abstract method.

Specified by:

getClassName in interface Scriptable

Specified by:

getClassName in class ScriptableObject

init

public static void init(Context cx,
 Scriptable scope,
 boolean sealed)

getLength

public int getLength()

Get the number of bytes in the buffer.

getBuffer

public byte[] getBuffer()

Return the actual bytes that back the buffer. This is a reference to the real buffer, so changes to bytes here will be reflected in the actual object and all its views.

slice

public NativeArrayBuffer slice(int s,
 int e)

Return a new buffer that represents a slice of this buffer's content, starting at position "start" and ending at position "end". Both values will be "clamped" as per the JavaScript spec so that invalid values may be passed and will be adjusted up or down accordingly. This method will return a new buffer that contains a copy of the original buffer. Changes there will not affect the content of the buffer.

Parameters:

s - the position where the new buffer will start

e - the position where it will end

execIdCall

public Object execIdCall(IdFunctionObject f,
 Context cx,
 Scriptable scope,
 Scriptable thisObj,
 Object[] args)

Description copied from class: IdScriptableObject

'thisObj' will be null if invoked as constructor, in which case instance of Scriptable should be returned.

Specified by:

execIdCall in interface IdFunctionCall

Overrides:

execIdCall in class IdScriptableObject