Class NativeWeakSet

java.lang.Object

org.mozilla.javascript.ScriptableObject

org.mozilla.javascript.IdScriptableObject

org.mozilla.javascript.NativeWeakSet

All Implemented Interfaces:

Serializable, ConstProperties, DebuggableObject, IdFunctionCall, Scriptable, SymbolScriptable

public class NativeWeakSet
extends IdScriptableObject

This is an implementation of the ES6 WeakSet class. It is very similar to NativeWeakMap, with the exception being that it doesn't store any values. Java will GC the key only when there is no longer any reference to it other than the weak reference. That means that it is important that the "value" that we put in the WeakHashMap here is not one that contains the key.

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class ScriptableObject

ScriptableObject.KeyComparator

Field Summary

Fields

Modifier and Type	Field	Description
private static final int	Id_add
private static final int	Id_constructor
private static final int	Id_delete
private static final int	Id_has
private boolean	instanceOfWeakSet
private WeakHashMap<Scriptable, Boolean>	map
private static final Object	MAP_TAG
private static final int	MAX_PROTOTYPE_ID
private static final long	serialVersionUID
private static final int	SymbolId_toStringTag

Fields inherited from class ScriptableObject

CONST, DONTENUM, EMPTY, PERMANENT, READONLY, UNINITIALIZED_CONST

Fields inherited from interface Scriptable

NOT_FOUND

Constructor Summary

Constructors

Constructor	Description
NativeWeakSet()

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.
protected int	findPrototypeId(String s)
protected int	findPrototypeId(Symbol k)
String	getClassName()	Return the name of the class.
(package private) static void	init(Scriptable scope, boolean sealed)
protected void	initPrototypeId(int id)
private Object	js_add(Object key)
private Object	js_delete(Object key)
private Object	js_has(Object key)
private void	readObject(ObjectInputStream stream)
private static NativeWeakSet	realThis(Scriptable thisObj, IdFunctionObject f)

Methods inherited from class IdScriptableObject

activatePrototypeMap, addIdFunctionProperty, defaultGet, defaultHas, defaultPut, defineOwnProperty, delete, delete, ensureType, exportAsJSClass, fillConstructorProperties, findInstanceIdInfo, findInstanceIdInfo, get, get, getAttributes, getAttributes, getIds, getInstanceIdName, getInstanceIdValue, getMaxInstanceId, getOwnPropertyDescriptor, has, has, hasPrototypeMap, initPrototypeConstructor, initPrototypeMethod, initPrototypeMethod, initPrototypeMethod, initPrototypeValue, initPrototypeValue, instanceIdInfo, put, put, setAttributes, setInstanceIdAttributes, setInstanceIdValue

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, delete, deleteProperty, deleteProperty, ensureScriptable, ensureScriptableObject, ensureSymbolScriptable, equivalentValues, get, 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, has, hasInstance, hasProperty, hasProperty, hasProperty, isAccessorDescriptor, isConst, isDataDescriptor, isEmpty, isExtensible, isFalse, isGenericDescriptor, isGetterOrSetter, isSealed, isTrue, preventExtensions, put, 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

MAP_TAG

private static final Object MAP_TAG

instanceOfWeakSet

private boolean instanceOfWeakSet

map

private transient WeakHashMap<Scriptable, Boolean> map

Id_constructor

private static final int Id_constructor

See Also:

• Constant Field Values

Id_add

private static final int Id_add

See Also:

• Constant Field Values

Id_delete

private static final int Id_delete

See Also:

• Constant Field Values

Id_has

private static final int Id_has

See Also:

• Constant Field Values

SymbolId_toStringTag

private static final int SymbolId_toStringTag

See Also:

• Constant Field Values

MAX_PROTOTYPE_ID

private static final int MAX_PROTOTYPE_ID

See Also:

• Constant Field Values

Constructor Details

NativeWeakSet

public NativeWeakSet()

Method Details

init

static void init(Scriptable scope,
 boolean sealed)

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

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

js_add

private Object js_add(Object key)

js_delete

private Object js_delete(Object key)

js_has

private Object js_has(Object key)

realThis

private static NativeWeakSet realThis(Scriptable thisObj,
 IdFunctionObject f)

initPrototypeId

protected void initPrototypeId(int id)

Overrides:

initPrototypeId in class IdScriptableObject

findPrototypeId

protected int findPrototypeId(Symbol k)

Overrides:

findPrototypeId in class IdScriptableObject

findPrototypeId

protected int findPrototypeId(String s)

Overrides:

findPrototypeId in class IdScriptableObject

readObject

private void readObject(ObjectInputStream stream)
                 throws IOException,
ClassNotFoundException

Throws:

IOException

ClassNotFoundException