Class JSClass

java.lang.Object

com.oracle.truffle.js.runtime.builtins.JSClass

Direct Known Subclasses:

AbstractJSClass, JSNonProxy

public abstract class JSClass
extends Object

Basic interface for all JavaScript (ordinary and exotic) object types. A JSClass defines the internal and access methods of a JSObject and allows for overriding their behavior for different types of objects. It can be obtained from an object via Shape.getDynamicType(). The interface is inspired by ECMAScript internal methods. Parameter order: JSDynamicObject receiver[, the rest...].

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	JSClass()

Method Summary

Modifier and Type	Method	Description
abstract boolean	defineOwnProperty(JSDynamicObject thisObj, Object key, PropertyDescriptor value, boolean doThrow)	9.1.6 [[DefineOwnProperty]] (P, Desc).
abstract boolean	delete(JSDynamicObject thisObj, long index, boolean isStrict)
abstract boolean	delete(JSDynamicObject thisObj, Object key, boolean isStrict)	9.1.10 [[Delete]] (P).
static List<Object>	filterOwnPropertyKeys(List<Object> ownPropertyKeys, boolean strings, boolean symbols)
Object	get(JSDynamicObject thisObj, long index)
final Object	get(JSDynamicObject thisObj, Object key)	9.1.8 [[Get]] (P, Receiver).
abstract Object	getHelper(JSDynamicObject store, Object thisObj, long index, com.oracle.truffle.api.nodes.Node encapsulatingNode)
abstract Object	getHelper(JSDynamicObject store, Object thisObj, Object key, com.oracle.truffle.api.nodes.Node encapsulatingNode)
JSDynamicObject	getIntrinsicDefaultProto(JSRealm realm)	Allows invokevirtual of this method instead of invokeinterface.
abstract Object	getMethodHelper(JSDynamicObject store, Object thisObj, Object key, com.oracle.truffle.api.nodes.Node encapsulatingNode)
abstract Object	getOwnHelper(JSDynamicObject store, Object thisObj, long index, com.oracle.truffle.api.nodes.Node encapsulatingNode)
abstract Object	getOwnHelper(JSDynamicObject store, Object thisObj, Object key, com.oracle.truffle.api.nodes.Node encapsulatingNode)
abstract PropertyDescriptor	getOwnProperty(JSDynamicObject thisObj, Object key)	9.1.5 [[GetOwnProperty]] (P).
abstract List<Object>	getOwnPropertyKeys(JSDynamicObject obj, boolean strings, boolean symbols)	GetOwnPropertyKeys (O, type).
abstract JSDynamicObject	getPrototypeOf(JSDynamicObject thisObj)	9.1.1 [[GetPrototypeOf]] ().
abstract boolean	hasOnlyShapeProperties(JSDynamicObject obj)	If true, ownPropertyKeys(com.oracle.truffle.js.runtime.objects.JSDynamicObject) and JSShape.getPropertyKeyList(com.oracle.truffle.api.object.Shape, boolean, boolean) enumerate the same keys.
abstract boolean	hasOwnProperty(JSDynamicObject thisObj, long index)
abstract boolean	hasOwnProperty(JSDynamicObject thisObj, Object key)
abstract boolean	hasProperty(JSDynamicObject thisObj, long index)
abstract boolean	hasProperty(JSDynamicObject thisObj, Object key)	9.1.7 [[HasProperty]] (P).
abstract boolean	isExtensible(JSDynamicObject thisObj)	9.1.3 [[IsExtensible]] ().
final boolean	isInstance(JSDynamicObject object)
static boolean	isInstance(JSDynamicObject object, JSClass jsclass)
final boolean	isInstance(Object object)
static boolean	isInstance(Object object, JSClass jsclass)
com.oracle.truffle.api.object.Shape	makeInitialShape(JSContext context, JSDynamicObject prototype)
final List<Object>	ownPropertyKeys(JSDynamicObject obj)	9.1.12 [[OwnPropertyKeys]]().
abstract boolean	preventExtensions(JSDynamicObject thisObj, boolean doThrow)	9.1.4 [[PreventExtensions]] ().
abstract boolean	set(JSDynamicObject thisObj, long index, Object value, Object receiver, boolean isStrict, com.oracle.truffle.api.nodes.Node encapsulatingNode)
abstract boolean	set(JSDynamicObject thisObj, Object key, Object value, Object receiver, boolean isStrict, com.oracle.truffle.api.nodes.Node encapsulatingNode)	9.1.9 [[Set]] (P, V, Receiver).
abstract boolean	setPrototypeOf(JSDynamicObject thisObj, JSDynamicObject newPrototype)	9.1.2 [[SetPrototypeOf]] (V).
String	toString()
abstract boolean	usesOrdinaryGetOwnProperty()
abstract boolean	usesOrdinaryIsExtensible()

Methods inherited from class java.lang.Object

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

Constructor Details

JSClass

protected JSClass()

Method Details

getPrototypeOf

public abstract JSDynamicObject getPrototypeOf(JSDynamicObject thisObj)

9.1.1 [[GetPrototypeOf]] ().

setPrototypeOf

public abstract boolean setPrototypeOf(JSDynamicObject thisObj,
 JSDynamicObject newPrototype)

9.1.2 [[SetPrototypeOf]] (V).

isExtensible

public abstract boolean isExtensible(JSDynamicObject thisObj)

9.1.3 [[IsExtensible]] ().

preventExtensions

public abstract boolean preventExtensions(JSDynamicObject thisObj,
 boolean doThrow)

9.1.4 [[PreventExtensions]] ().

getOwnProperty

public abstract PropertyDescriptor getOwnProperty(JSDynamicObject thisObj,
 Object key)

9.1.5 [[GetOwnProperty]] (P).

defineOwnProperty

public abstract boolean defineOwnProperty(JSDynamicObject thisObj,
 Object key,
 PropertyDescriptor value,
 boolean doThrow)

9.1.6 [[DefineOwnProperty]] (P, Desc).

hasProperty

public abstract boolean hasProperty(JSDynamicObject thisObj,
 Object key)

9.1.7 [[HasProperty]] (P).

hasProperty

public abstract boolean hasProperty(JSDynamicObject thisObj,
 long index)

hasOwnProperty

public abstract boolean hasOwnProperty(JSDynamicObject thisObj,
 Object key)

hasOwnProperty

public abstract boolean hasOwnProperty(JSDynamicObject thisObj,
 long index)

get

public final Object get(JSDynamicObject thisObj,
 Object key)

9.1.8 [[Get]] (P, Receiver).

get

public Object get(JSDynamicObject thisObj,
 long index)

getHelper

public abstract Object getHelper(JSDynamicObject store,
 Object thisObj,
 Object key,
 com.oracle.truffle.api.nodes.Node encapsulatingNode)

getHelper

public abstract Object getHelper(JSDynamicObject store,
 Object thisObj,
 long index,
 com.oracle.truffle.api.nodes.Node encapsulatingNode)

getOwnHelper

public abstract Object getOwnHelper(JSDynamicObject store,
 Object thisObj,
 Object key,
 com.oracle.truffle.api.nodes.Node encapsulatingNode)

getOwnHelper

public abstract Object getOwnHelper(JSDynamicObject store,
 Object thisObj,
 long index,
 com.oracle.truffle.api.nodes.Node encapsulatingNode)

getMethodHelper

public abstract Object getMethodHelper(JSDynamicObject store,
 Object thisObj,
 Object key,
 com.oracle.truffle.api.nodes.Node encapsulatingNode)

set

public abstract boolean set(JSDynamicObject thisObj,
 Object key,
 Object value,
 Object receiver,
 boolean isStrict,
 com.oracle.truffle.api.nodes.Node encapsulatingNode)

9.1.9 [[Set]] (P, V, Receiver).

set

public abstract boolean set(JSDynamicObject thisObj,
 long index,
 Object value,
 Object receiver,
 boolean isStrict,
 com.oracle.truffle.api.nodes.Node encapsulatingNode)

delete

public abstract boolean delete(JSDynamicObject thisObj,
 Object key,
 boolean isStrict)

9.1.10 [[Delete]] (P).

delete

public abstract boolean delete(JSDynamicObject thisObj,
 long index,
 boolean isStrict)

ownPropertyKeys

public final List<Object> ownPropertyKeys(JSDynamicObject obj)

9.1.12 [[OwnPropertyKeys]](). Provides all own properties of this object with a String or Symbol key. Represents the [[OwnPropertyKeys]] internal method.

Returns:

a List of the keys of all own properties of that object

getOwnPropertyKeys

public abstract List<Object> getOwnPropertyKeys(JSDynamicObject obj,
 boolean strings,
 boolean symbols)

GetOwnPropertyKeys (O, type).

Returns:

a List of the keys of all own properties of that object with the specified types

filterOwnPropertyKeys

public static List<Object> filterOwnPropertyKeys(List<Object> ownPropertyKeys,
 boolean strings,
 boolean symbols)

hasOnlyShapeProperties

public abstract boolean hasOnlyShapeProperties(JSDynamicObject obj)

If true, ownPropertyKeys(com.oracle.truffle.js.runtime.objects.JSDynamicObject) and JSShape.getPropertyKeyList(com.oracle.truffle.api.object.Shape, boolean, boolean) enumerate the same keys.

toString

public String toString()

Overrides:

toString in class Object

isInstance

public final boolean isInstance(JSDynamicObject object)

isInstance

public final boolean isInstance(Object object)

isInstance

public static boolean isInstance(Object object,
 JSClass jsclass)

isInstance

public static boolean isInstance(JSDynamicObject object,
 JSClass jsclass)

makeInitialShape

public com.oracle.truffle.api.object.Shape makeInitialShape(JSContext context,
 JSDynamicObject prototype)

getIntrinsicDefaultProto

public JSDynamicObject getIntrinsicDefaultProto(JSRealm realm)

Allows invokevirtual of this method instead of invokeinterface. Classes overriding this method should implement PrototypeSupplier.

See Also:

• PrototypeSupplier.getIntrinsicDefaultProto(com.oracle.truffle.js.runtime.JSRealm)

usesOrdinaryGetOwnProperty

public abstract boolean usesOrdinaryGetOwnProperty()

usesOrdinaryIsExtensible

public abstract boolean usesOrdinaryIsExtensible()