Class Arguments

java.lang.Object

org.mozilla.javascript.ScriptableObject

org.mozilla.javascript.IdScriptableObject

org.mozilla.javascript.Arguments

All Implemented Interfaces:

Serializable, ConstProperties, DebuggableObject, IdFunctionCall, Scriptable, SymbolScriptable

final class Arguments
extends IdScriptableObject

This class implements the "arguments" object.

See ECMA 10.1.8

See Also:

• NativeCall

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static class	Arguments.ThrowTypeError

Nested classes/interfaces inherited from class ScriptableObject

ScriptableObject.KeyComparator

Field Summary

Fields

Modifier and Type	Field	Description
private NativeCall	activation
private Object[]	args
private int	calleeAttr
private Object	calleeObj
private int	callerAttr
private Object	callerObj
private static final String	FTAG
private static final int	Id_callee
private static final int	Id_caller
private static final int	Id_length
private static BaseFunction	iteratorMethod
private int	lengthAttr
private Object	lengthObj
private static final int	MAX_INSTANCE_ID
private static final long	serialVersionUID

Fields inherited from class ScriptableObject

CONST, DONTENUM, EMPTY, PERMANENT, READONLY, UNINITIALIZED_CONST

Fields inherited from interface Scriptable

NOT_FOUND

Constructor Summary

Constructors

Constructor	Description
Arguments(NativeCall activation)

Method Summary

Modifier and Type	Method	Description
private Object	arg(int index)
(package private) void	defineAttributesForStrictMode()
protected void	defineOwnProperty(Context cx, Object id, ScriptableObject desc, boolean checkValid)	Defines a property on an object.
void	delete(int index)	Removes the indexed property from the object.
protected int	findInstanceIdInfo(String s)	Map name to id of instance property.
Object	get(int index, Scriptable start)	Returns the value of the indexed property or NOT_FOUND.
String	getClassName()	Return the name of the class.
private Object	getFromActivation(int index)
(package private) Object[]	getIds(boolean getNonEnumerable, boolean getSymbols)
protected String	getInstanceIdName(int id)	Map id back to property name it defines.
protected Object	getInstanceIdValue(int id)	Get id value.
protected int	getMaxInstanceId()	Get maximum id findInstanceIdInfo can generate.
protected ScriptableObject	getOwnPropertyDescriptor(Context cx, Object id)
boolean	has(int index, Scriptable start)	Returns true if the property index is defined.
void	put(int index, Scriptable start, Object value)	Sets the value of the indexed property, creating it if need be.
void	put(String name, Scriptable start, Object value)	Sets the value of the named property, creating it if need be.
private void	putIntoActivation(int index, Object value)
private void	removeArg(int index)
private void	replaceArg(int index, Object value)
protected void	setInstanceIdAttributes(int id, int attr)	Update the attributes of the given instance property.
protected void	setInstanceIdValue(int id, Object value)	Set or delete id value.
private boolean	sharedWithActivation(int index)

Methods inherited from class IdScriptableObject

activatePrototypeMap, addIdFunctionProperty, defaultGet, defaultHas, defaultPut, delete, delete, ensureType, execIdCall, exportAsJSClass, fillConstructorProperties, findInstanceIdInfo, findPrototypeId, findPrototypeId, get, get, getAttributes, getAttributes, has, has, hasPrototypeMap, initPrototypeConstructor, initPrototypeId, initPrototypeMethod, initPrototypeMethod, initPrototypeMethod, initPrototypeValue, initPrototypeValue, instanceIdInfo, put, setAttributes

Methods inherited from class ScriptableObject

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

Methods inherited from class Object

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

Field Details

serialVersionUID

private static final long serialVersionUID

See Also:

• Constant Field Values

FTAG

private static final String FTAG

See Also:

• Constant Field Values

Id_callee

private static final int Id_callee

See Also:

• Constant Field Values

Id_length

private static final int Id_length

See Also:

• Constant Field Values

Id_caller

private static final int Id_caller

See Also:

• Constant Field Values

MAX_INSTANCE_ID

private static final int MAX_INSTANCE_ID

See Also:

• Constant Field Values

iteratorMethod

private static BaseFunction iteratorMethod

callerObj

private Object callerObj

calleeObj

private Object calleeObj

lengthObj

private Object lengthObj

callerAttr

private int callerAttr

calleeAttr

private int calleeAttr

lengthAttr

private int lengthAttr

activation

private NativeCall activation

args

private Object[] args

Constructor Details

Arguments

public Arguments(NativeCall activation)

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

arg

private Object arg(int index)

putIntoActivation

private void putIntoActivation(int index,
 Object value)

getFromActivation

private Object getFromActivation(int index)

replaceArg

private void replaceArg(int index,
 Object value)

removeArg

private void removeArg(int index)

has

public boolean has(int index,
 Scriptable start)

Description copied from class: ScriptableObject

Returns true if the property index is defined.

Specified by:

has in interface Scriptable

Overrides:

has in class ScriptableObject

Parameters:

index - the numeric index for the property

start - the object in which the lookup began

Returns:

true if and only if the property was found in the object

See Also:

• Scriptable.get(int, Scriptable)
• ScriptableObject.getProperty(Scriptable, int)

get

public Object get(int index,
 Scriptable start)

Description copied from class: ScriptableObject

Returns the value of the indexed property or NOT_FOUND.

Specified by:

get in interface Scriptable

Overrides:

get in class ScriptableObject

Parameters:

index - the numeric index for the property

start - the object in which the lookup began

Returns:

the value of the property (may be null), or NOT_FOUND

See Also:

• Scriptable.get(String,Scriptable)

sharedWithActivation

private boolean sharedWithActivation(int index)

put

public void put(int index,
 Scriptable start,
 Object value)

Description copied from class: ScriptableObject

Sets the value of the indexed property, creating it if need be.

Specified by:

put in interface Scriptable

Overrides:

put in class ScriptableObject

Parameters:

index - the numeric index for the property

start - the object whose property is being set

value - value to set the property to

See Also:

• Scriptable.has(int, Scriptable)
• Scriptable.get(int, Scriptable)
• ScriptableObject.putProperty(Scriptable, int, Object)
• Context.toObject(Object, Scriptable)

put

public void put(String name,
 Scriptable start,
 Object value)

Description copied from class: ScriptableObject

Sets the value of the named property, creating it if need be.

If the property was created using defineProperty, the appropriate setter method is called.

If the property's attributes include READONLY, no action is taken. This method will actually set the property in the start object.

Specified by:

put in interface Scriptable

Overrides:

put in class IdScriptableObject

Parameters:

name - the name of the property

start - the object whose property is being set

value - value to set the property to

See Also:

• Scriptable.has(String, Scriptable)
• Scriptable.get(String, Scriptable)
• ScriptableObject.putProperty(Scriptable, String, Object)
• Context.toObject(Object, Scriptable)

delete

public void delete(int index)

Description copied from class: ScriptableObject

Removes the indexed property from the object.

If the property is not found, or it has the PERMANENT attribute, no action is taken.

Specified by:

delete in interface Scriptable

Overrides:

delete in class ScriptableObject

Parameters:

index - the numeric index for the property

See Also:

• Scriptable.get(int, Scriptable)
• ScriptableObject.deleteProperty(Scriptable, int)

getMaxInstanceId

protected int getMaxInstanceId()

Description copied from class: IdScriptableObject

Get maximum id findInstanceIdInfo can generate.

Overrides:

getMaxInstanceId in class IdScriptableObject

findInstanceIdInfo

protected int findInstanceIdInfo(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

getInstanceIdName

protected String getInstanceIdName(int id)

Description copied from class: IdScriptableObject

Map id back to property name it defines.

Overrides:

getInstanceIdName in class IdScriptableObject

getInstanceIdValue

protected 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

setInstanceIdValue

protected void setInstanceIdValue(int id,
 Object value)

Description copied from class: IdScriptableObject

Set or delete id value. If value == NOT_FOUND , the implementation should make sure that the following getInstanceIdValue return NOT_FOUND.

Overrides:

setInstanceIdValue in class IdScriptableObject

setInstanceIdAttributes

protected void setInstanceIdAttributes(int id,
 int attr)

Description copied from class: IdScriptableObject

Update the attributes of the given instance property. Classes which want to support changing property attributes via Object.defineProperty must override this method. The default implementation throws InternalError.

Overrides:

setInstanceIdAttributes in class IdScriptableObject

Parameters:

id - the instance property id

attr - the new attribute bitset

getIds

Object[] getIds(boolean getNonEnumerable,
 boolean getSymbols)

Overrides:

getIds in class IdScriptableObject

getOwnPropertyDescriptor

protected ScriptableObject getOwnPropertyDescriptor(Context cx,
 Object id)

Overrides:

getOwnPropertyDescriptor in class IdScriptableObject

defineOwnProperty

protected void defineOwnProperty(Context cx,
 Object id,
 ScriptableObject desc,
 boolean checkValid)

Description copied from class: ScriptableObject

Defines a property on an object.

Based on [[DefineOwnProperty]] from 8.12.10 of the spec.

Overrides:

defineOwnProperty in class IdScriptableObject

Parameters:

cx - the current Context

id - the name/index of the property

desc - the new property descriptor, as described in 8.6.1

checkValid - whether to perform validity checks

defineAttributesForStrictMode

void defineAttributesForStrictMode()