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:

java.io.Serializable, ConstProperties, DebuggableObject, IdFunctionCall, Scriptable, SymbolScriptable

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

Nested Class Summary

Nested classes/interfaces inherited from class org.mozilla.javascript.ScriptableObject

ScriptableObject.KeyComparator

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	CLASS_NAME

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

Method Summary

Modifier and Type	Method and Description
java.lang.Object	execIdCall(IdFunctionObject f, Context cx, Scriptable scope, Scriptable thisObj, java.lang.Object[] args) 'thisObj' will be null if invoked as constructor, in which case instance of Scriptable should be returned.
protected void	fillConstructorProperties(IdFunctionObject ctor)
protected int	findInstanceIdInfo(java.lang.String s) Map name to id of instance property.
protected int	findPrototypeId(java.lang.String s)
byte[]	getBuffer() Return the actual bytes that back the buffer.
java.lang.String	getClassName() Return the name of the class.
protected java.lang.String	getInstanceIdName(int id) Map id back to property name it defines.
protected java.lang.Object	getInstanceIdValue(int id) Get id value.
int	getLength() Get the number of bytes in the buffer.
protected int	getMaxInstanceId() Get maximum id findInstanceIdInfo can generate.
static void	init(Context cx, Scriptable scope, boolean sealed)
protected void	initPrototypeId(int id)
NativeArrayBuffer	slice(double s, double 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, addIdFunctionProperty, defaultGet, defaultHas, defaultPut, defineOwnProperty, delete, delete, exportAsJSClass, findInstanceIdInfo, findPrototypeId, get, get, getAttributes, getAttributes, getOwnPropertyDescriptor, has, has, hasPrototypeMap, incompatibleCallError, initPrototypeConstructor, initPrototypeMethod, initPrototypeMethod, initPrototypeMethod, initPrototypeValue, initPrototypeValue, instanceIdInfo, put, put, setAttributes, setInstanceIdAttributes, setInstanceIdValue

Methods inherited from class org.mozilla.javascript.ScriptableObject

applyDescriptorToAttributeBitset, associateValue, avoidObjectDetection, buildDataDescriptor, callMethod, callMethod, checkPropertyChange, checkPropertyDefinition, defineClass, defineClass, defineClass, defineConst, defineConstProperty, defineFunctionProperties, defineOwnProperties, defineOwnProperty, defineProperty, defineProperty, defineProperty, defineProperty, defineProperty, delete, deleteProperty, deleteProperty, ensureScriptable, ensureScriptableObject, ensureSymbolScriptable, equivalentValues, get, get, getAllIds, getArrayPrototype, getAssociatedValue, getAttributes, getAttributes, getAttributes, getClassPrototype, getDefaultValue, getDefaultValue, getExternalArrayData, getExternalArrayLength, getFunctionPrototype, getGeneratorFunctionPrototype, getGetterOrSetter, getIds, getObjectPrototype, getParentScope, getProperty, getProperty, getProperty, getPropertyIds, getPrototype, getSlot, getTopLevelScope, getTopScopeValue, getTypedProperty, getTypedProperty, getTypeOf, has, hasInstance, hasProperty, hasProperty, hasProperty, isAccessorDescriptor, isConst, isDataDescriptor, isEmpty, isExtensible, isFalse, isGenericDescriptor, isGetterOrSetter, isSealed, isTrue, preventExtensions, put, putConst, putConstProperty, putProperty, putProperty, putProperty, redefineProperty, sameValue, sealObject, setAttributes, setAttributes, setAttributes, setAttributes, setExternalArrayData, setGetterOrSetter, setParentScope, setPrototype, size

Methods inherited from class java.lang.Object

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

Field Detail

CLASS_NAME

public static final java.lang.String CLASS_NAME

See Also:

Constant Field Values

Constructor Detail

NativeArrayBuffer

public NativeArrayBuffer()

Create an empty buffer.

NativeArrayBuffer

public NativeArrayBuffer(double len)

Create a buffer of the specified length in bytes.

Method Detail

getClassName

public java.lang.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(double s,
                               double 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 java.lang.Object execIdCall(IdFunctionObject f,
                                   Context cx,
                                   Scriptable scope,
                                   Scriptable thisObj,
                                   java.lang.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

initPrototypeId

protected void initPrototypeId(int id)

Overrides:

initPrototypeId in class IdScriptableObject

findPrototypeId

protected int findPrototypeId(java.lang.String s)

Overrides:

findPrototypeId in class IdScriptableObject

fillConstructorProperties

protected void fillConstructorProperties(IdFunctionObject ctor)

Overrides:

fillConstructorProperties in class IdScriptableObject

getMaxInstanceId

protected int getMaxInstanceId()

Description copied from class: IdScriptableObject

Get maximum id findInstanceIdInfo can generate.

Overrides:

getMaxInstanceId in class IdScriptableObject

getInstanceIdName

protected java.lang.String getInstanceIdName(int id)

Description copied from class: IdScriptableObject

Map id back to property name it defines.

Overrides:

getInstanceIdName in class IdScriptableObject

getInstanceIdValue

protected java.lang.Object getInstanceIdValue(int id)

Description copied from class: IdScriptableObject

Get id value. If id value is constant, descendant can call cacheIdValue to store value in the permanent cache. Default implementation creates IdFunctionObject instance for given id and cache its value

Overrides:

getInstanceIdValue in class IdScriptableObject

findInstanceIdInfo

protected int findInstanceIdInfo(java.lang.String s)

Description copied from class: IdScriptableObject

Map name to id of instance property. Should return 0 if not found or the result of IdScriptableObject.instanceIdInfo(int, int).

Overrides:

findInstanceIdInfo in class IdScriptableObject