Package org.mozilla.javascript

Class NativeSymbol

java.lang.Object

org.mozilla.javascript.ScriptableObject

org.mozilla.javascript.NativeSymbol

All Implemented Interfaces:

Serializable, ConstProperties, DebuggableObject, Scriptable, Symbol, SymbolScriptable

public class NativeSymbol
extends ScriptableObject
implements Symbol

This is an implementation of the standard "Symbol" type that implements all of its weird properties. One of them is that some objects can have an "internal data slot" that makes them a Symbol and others cannot.

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	Description
static final String	CLASS_NAME
static final String	TYPE_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	Description
NativeSymbol(NativeSymbol s)

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object x)
String	getClassName()	Return the name of the class.
String	getTypeOf()	Gets the value that will be returned by calling the typeof operator on this object.
int	hashCode()
static void	init(Context cx, Scriptable scope, boolean sealed)
boolean	isSymbol()	Object() on a Symbol constructs an object which is NOT a symbol, but which has an "internal data slot" that is.
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.
void	put(Symbol key, Scriptable start, Object value)	Implementation of put required by SymbolScriptable objects.
String	toString()

Methods inherited from class org.mozilla.javascript.ScriptableObject

applyDescriptorToAttributeBitset, associateValue, avoidObjectDetection, buildDataDescriptor, callMethod, callMethod, checkPropertyChange, checkPropertyDefinition, defineClass, defineClass, defineClass, defineConst, defineConstProperty, defineFunctionProperties, defineOwnProperties, defineOwnProperty, defineOwnProperty, defineProperty, defineProperty, defineProperty, defineProperty, defineProperty, defineProperty, defineProperty, defineProperty, delete, delete, delete, deleteProperty, deleteProperty, ensureScriptable, ensureScriptableObject, ensureSymbolScriptable, equivalentValues, get, get, get, get, getAllIds, getArrayPrototype, getAssociatedValue, getAttributes, getAttributes, getAttributes, getAttributes, getAttributes, getClassPrototype, getDefaultValue, getDefaultValue, getExternalArrayData, getExternalArrayLength, getFunctionPrototype, getGeneratorFunctionPrototype, getGetterOrSetter, getGetterOrSetter, getIds, getObjectPrototype, getOwnPropertyDescriptor, getParentScope, getProperty, getProperty, getProperty, getPropertyIds, getPrototype, getTopLevelScope, getTopScopeValue, getTypedProperty, getTypedProperty, has, has, has, 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, setAttributes, setCommonDescriptorProperties, setExternalArrayData, setGetterOrSetter, setParentScope, setPrototype, size

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Details

CLASS_NAME

public static final String CLASS_NAME

See Also:

• Constant Field Values

TYPE_NAME

public static final String TYPE_NAME

See Also:

• Constant Field Values

Constructor Details

NativeSymbol

public NativeSymbol(NativeSymbol s)

Method Details

init

public static void init(Context cx,
 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

toString

public String toString()

Overrides:

toString in class Object

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 ScriptableObject

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)

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(Symbol key,
 Scriptable start,
 Object value)

Description copied from class: ScriptableObject

Implementation of put required by SymbolScriptable objects.

Specified by:

put in interface SymbolScriptable

Overrides:

put in class ScriptableObject

isSymbol

public boolean isSymbol()

Object() on a Symbol constructs an object which is NOT a symbol, but which has an "internal data slot" that is. Furthermore, such an object has the Symbol prototype so this particular object is still used. Account for that here: an "Object" that was created from a Symbol has a different value of the slot.

getTypeOf

public String getTypeOf()

Description copied from class: ScriptableObject

Gets the value that will be returned by calling the typeof operator on this object.

Overrides:

getTypeOf in class ScriptableObject

Returns:

default is "object" unless ScriptableObject.avoidObjectDetection() is true in which case it returns "undefined"

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object x)

Overrides:

equals in class Object