Package org.htmlunit.corejs.javascript

Class NativeProxy

java.lang.Object

org.htmlunit.corejs.javascript.ScriptableObject

org.htmlunit.corejs.javascript.NativeProxy

All Implemented Interfaces:

Serializable, Callable, ConstProperties, Constructable, DebuggableObject, Scriptable, SymbolScriptable

final class NativeProxy
extends ScriptableObject
implements Callable, Constructable

This class implements the Proxy object.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static final class	NativeProxy.Revoker

Nested classes/interfaces inherited from class org.htmlunit.corejs.javascript.ScriptableObject

ScriptableObject.KeyComparator

Field Summary

Fields

Modifier and Type	Field	Description
private Scriptable	handlerObj
private static final String	PROXY_TAG
private static final long	serialVersionUID
private ScriptableObject	targetObj
private static final String	TRAP_APPLY
private static final String	TRAP_CONSTRUCT
private static final String	TRAP_DEFINE_PROPERTY
private static final String	TRAP_DELETE_PROPERTY
private static final String	TRAP_GET
private static final String	TRAP_GET_OWN_PROPERTY_DESCRIPTOR
private static final String	TRAP_GET_PROTOTYPE_OF
private static final String	TRAP_HAS
private static final String	TRAP_IS_EXTENSIBLE
private static final String	TRAP_OWN_KEYS
private static final String	TRAP_PREVENT_EXTENSIONS
private static final String	TRAP_SET
private static final String	TRAP_SET_PROTOTYPE_OF
private final String	typeOf

Fields inherited from class org.htmlunit.corejs.javascript.ScriptableObject

CONST, DONTENUM, EMPTY, PERMANENT, READONLY, UNINITIALIZED_CONST

Fields inherited from interface org.htmlunit.corejs.javascript.Scriptable

NOT_FOUND

Constructor Summary

Constructors

Modifier	Constructor	Description
private	NativeProxy(ScriptableObject target, Scriptable handler)

Method Summary

Modifier and Type	Method	Description
Object	call(Context cx, Scriptable scope, Scriptable thisObj, Object[] args)	see https://262.ecma-international.org/12.0/#sec-proxy-object-internal-methods-and-internal-slots-call-thisargument-argumentslist
private Object	callTrap(Callable trap, Object[] args)
Scriptable	construct(Context cx, Scriptable scope, Object[] args)	see https://262.ecma-international.org/12.0/#sec-proxy-object-internal-methods-and-internal-slots-construct-argumentslist-newtarget
private static NativeProxy	constructor(Context cx, Scriptable scope, Object[] args)
boolean	defineOwnProperty(Context cx, Object id, ScriptableObject desc)	see https://262.ecma-international.org/12.0/#sec-proxy-object-internal-methods-and-internal-slots-defineownproperty-p-desc
void	delete(int index)	see https://262.ecma-international.org/12.0/#sec-proxy-object-internal-methods-and-internal-slots-delete-p
void	delete(String name)	see https://262.ecma-international.org/12.0/#sec-proxy-object-internal-methods-and-internal-slots-delete-p
void	delete(Symbol key)	see https://262.ecma-international.org/12.0/#sec-proxy-object-internal-methods-and-internal-slots-delete-p
Object	get(int index, Scriptable start)	see https://262.ecma-international.org/12.0/#sec-proxy-object-internal-methods-and-internal-slots-get-p-receiver
Object	get(String name, Scriptable start)	see https://262.ecma-international.org/12.0/#sec-proxy-object-internal-methods-and-internal-slots-get-p-receiver
Object	get(Symbol key, Scriptable start)	see https://262.ecma-international.org/12.0/#sec-proxy-object-internal-methods-and-internal-slots-get-p-receiver
String	getClassName()	Return the name of the class.
(package private) Object[]	getIds(boolean getNonEnumerable, boolean getSymbols)	see https://262.ecma-international.org/12.0/#sec-proxy-object-internal-methods-and-internal-slots-ownpropertykeys
protected ScriptableObject	getOwnPropertyDescriptor(Context cx, Object id)	see https://262.ecma-international.org/12.0/#sec-proxy-object-internal-methods-and-internal-slots-getownproperty-p
Scriptable	getPrototype()	see https://262.ecma-international.org/12.0/#sec-proxy-object-internal-methods-and-internal-slots-getprototypeof
(package private) ScriptableObject	getTargetThrowIfRevoked()
private Callable	getTrap(String trapName)
String	getTypeOf()	Gets the value that will be returned by calling the typeof operator on this object.
boolean	has(int index, Scriptable start)	see https://262.ecma-international.org/12.0/#sec-proxy-object-internal-methods-and-internal-slots-hasproperty-p
boolean	has(String name, Scriptable start)	https://262.ecma-international.org/12.0/#sec-proxy-object-internal-methods-and-internal-slots-hasproperty-p
boolean	has(Symbol key, Scriptable start)	see https://262.ecma-international.org/12.0/#sec-proxy-object-internal-methods-and-internal-slots-hasproperty-p
static void	init(Context cx, Scriptable scope, boolean sealed)
boolean	isExtensible()	see https://262.ecma-international.org/12.0/#sec-proxy-object-internal-methods-and-internal-slots-isextensible
boolean	preventExtensions()	see https://262.ecma-international.org/12.0/#sec-proxy-object-internal-methods-and-internal-slots-preventextensions
void	put(int index, Scriptable start, Object value)	https://262.ecma-international.org/12.0/#sec-proxy-object-internal-methods-and-internal-slots-set-p-v-receiver
void	put(String name, Scriptable start, Object value)	https://262.ecma-international.org/12.0/#sec-proxy-object-internal-methods-and-internal-slots-set-p-v-receiver
void	put(Symbol key, Scriptable start, Object value)	https://262.ecma-international.org/12.0/#sec-proxy-object-internal-methods-and-internal-slots-set-p-v-receiver
private static Object	revocable(Context cx, Scriptable scope, Scriptable thisObj, Object[] args)
void	setPrototype(Scriptable prototype)	see https://262.ecma-international.org/12.0/#sec-proxy-object-internal-methods-and-internal-slots-setprototypeof-v
private void	setPrototypeDirect(Scriptable prototype)

Methods inherited from class org.htmlunit.corejs.javascript.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, defineProperty, deleteProperty, deleteProperty, deleteProperty, ensureScriptable, ensureScriptableObject, ensureSymbolScriptable, equivalentValues, get, getAllIds, getArrayPrototype, getAssociatedValue, getAttributes, getAttributes, getAttributes, getAttributes, getAttributes, getBase, getBase, getClassPrototype, getDefaultValue, getDefaultValue, getExternalArrayData, getExternalArrayLength, getFunctionPrototype, getGeneratorFunctionPrototype, getGetterOrSetter, getGetterOrSetter, getIds, getObjectPrototype, getParentScope, getProperty, getProperty, getProperty, getPropertyIds, getTopLevelScope, getTopScopeValue, getTypedProperty, getTypedProperty, hasInstance, hasProperty, hasProperty, hasProperty, isAccessorDescriptor, isConst, isDataDescriptor, isEmpty, isFalse, isGenericDescriptor, isGetterOrSetter, isSealed, isTrue, putConst, putConstProperty, putImpl, putProperty, putProperty, putProperty, querySlot, redefineProperty, sameValue, sealObject, setAttributes, setAttributes, setAttributes, setAttributes, setAttributes, setCommonDescriptorProperties, setExternalArrayData, setGetterOrSetter, setParentScope, size

Methods inherited from class java.lang.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

PROXY_TAG

private static final String PROXY_TAG

See Also:

• Constant Field Values

TRAP_GET_PROTOTYPE_OF

private static final String TRAP_GET_PROTOTYPE_OF

See Also:

• Constant Field Values

TRAP_SET_PROTOTYPE_OF

private static final String TRAP_SET_PROTOTYPE_OF

See Also:

• Constant Field Values

TRAP_IS_EXTENSIBLE

private static final String TRAP_IS_EXTENSIBLE

See Also:

• Constant Field Values

TRAP_PREVENT_EXTENSIONS

private static final String TRAP_PREVENT_EXTENSIONS

See Also:

• Constant Field Values

TRAP_GET_OWN_PROPERTY_DESCRIPTOR

private static final String TRAP_GET_OWN_PROPERTY_DESCRIPTOR

See Also:

• Constant Field Values

TRAP_DEFINE_PROPERTY

private static final String TRAP_DEFINE_PROPERTY

See Also:

• Constant Field Values

TRAP_HAS

private static final String TRAP_HAS

See Also:

• Constant Field Values

TRAP_GET

private static final String TRAP_GET

See Also:

• Constant Field Values

TRAP_SET

private static final String TRAP_SET

See Also:

• Constant Field Values

TRAP_DELETE_PROPERTY

private static final String TRAP_DELETE_PROPERTY

See Also:

• Constant Field Values

TRAP_OWN_KEYS

private static final String TRAP_OWN_KEYS

See Also:

• Constant Field Values

TRAP_APPLY

private static final String TRAP_APPLY

See Also:

• Constant Field Values

TRAP_CONSTRUCT

private static final String TRAP_CONSTRUCT

See Also:

• Constant Field Values

targetObj

private ScriptableObject targetObj

handlerObj

private Scriptable handlerObj

typeOf

private final String typeOf

Constructor Details

NativeProxy

private NativeProxy(ScriptableObject target,
 Scriptable handler)

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

construct

public Scriptable construct(Context cx,
 Scriptable scope,
 Object[] args)

see https://262.ecma-international.org/12.0/#sec-proxy-object-internal-methods-and-internal-slots-construct-argumentslist-newtarget

Specified by:

construct in interface Constructable

Parameters:

cx - the current Context for this thread

scope - an enclosing scope of the caller except when the function is called from a closure.

args - the array of arguments

Returns:

the allocated object

has

public boolean has(String name,
 Scriptable start)

https://262.ecma-international.org/12.0/#sec-proxy-object-internal-methods-and-internal-slots-hasproperty-p

Specified by:

has in interface Scriptable

Overrides:

has in class ScriptableObject

Parameters:

name - the name of 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(String, Scriptable)
• ScriptableObject.getProperty(Scriptable, String)

has

public boolean has(int index,
 Scriptable start)

see https://262.ecma-international.org/12.0/#sec-proxy-object-internal-methods-and-internal-slots-hasproperty-p

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)

has

public boolean has(Symbol key,
 Scriptable start)

see https://262.ecma-international.org/12.0/#sec-proxy-object-internal-methods-and-internal-slots-hasproperty-p

Specified by:

has in interface SymbolScriptable

Overrides:

has in class ScriptableObject

getIds

Object[] getIds(boolean getNonEnumerable,
 boolean getSymbols)

see https://262.ecma-international.org/12.0/#sec-proxy-object-internal-methods-and-internal-slots-ownpropertykeys

Overrides:

getIds in class ScriptableObject

get

public Object get(String name,
 Scriptable start)

see https://262.ecma-international.org/12.0/#sec-proxy-object-internal-methods-and-internal-slots-get-p-receiver

Specified by:

get in interface Scriptable

Overrides:

get in class ScriptableObject

Parameters:

name - the name of the property

start - the object in which the lookup began

Returns:

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

See Also:

• Context.getUndefinedValue()

get

public Object get(int index,
 Scriptable start)

see https://262.ecma-international.org/12.0/#sec-proxy-object-internal-methods-and-internal-slots-get-p-receiver

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)

get

public Object get(Symbol key,
 Scriptable start)

see https://262.ecma-international.org/12.0/#sec-proxy-object-internal-methods-and-internal-slots-get-p-receiver

Specified by:

get in interface SymbolScriptable

Overrides:

get in class ScriptableObject

put

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

https://262.ecma-international.org/12.0/#sec-proxy-object-internal-methods-and-internal-slots-set-p-v-receiver

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)

https://262.ecma-international.org/12.0/#sec-proxy-object-internal-methods-and-internal-slots-set-p-v-receiver

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)

https://262.ecma-international.org/12.0/#sec-proxy-object-internal-methods-and-internal-slots-set-p-v-receiver

Specified by:

put in interface SymbolScriptable

Overrides:

put in class ScriptableObject

delete

public void delete(String name)

see https://262.ecma-international.org/12.0/#sec-proxy-object-internal-methods-and-internal-slots-delete-p

Specified by:

delete in interface Scriptable

Overrides:

delete in class ScriptableObject

Parameters:

name - the name of the property

See Also:

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

delete

public void delete(int index)

see https://262.ecma-international.org/12.0/#sec-proxy-object-internal-methods-and-internal-slots-delete-p

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)

delete

public void delete(Symbol key)

see https://262.ecma-international.org/12.0/#sec-proxy-object-internal-methods-and-internal-slots-delete-p

Specified by:

delete in interface SymbolScriptable

Overrides:

delete in class ScriptableObject

getOwnPropertyDescriptor

protected ScriptableObject getOwnPropertyDescriptor(Context cx,
 Object id)

see https://262.ecma-international.org/12.0/#sec-proxy-object-internal-methods-and-internal-slots-getownproperty-p

Overrides:

getOwnPropertyDescriptor in class ScriptableObject

defineOwnProperty

public boolean defineOwnProperty(Context cx,
 Object id,
 ScriptableObject desc)

see https://262.ecma-international.org/12.0/#sec-proxy-object-internal-methods-and-internal-slots-defineownproperty-p-desc

Overrides:

defineOwnProperty in class ScriptableObject

Parameters:

cx - the current Context

id - the name/index of the property

desc - the new property descriptor, as described in 8.6.1

isExtensible

public boolean isExtensible()

see https://262.ecma-international.org/12.0/#sec-proxy-object-internal-methods-and-internal-slots-isextensible

Overrides:

isExtensible in class ScriptableObject

preventExtensions

public boolean preventExtensions()

see https://262.ecma-international.org/12.0/#sec-proxy-object-internal-methods-and-internal-slots-preventextensions

Overrides:

preventExtensions in class ScriptableObject

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"

getPrototype

public Scriptable getPrototype()

see https://262.ecma-international.org/12.0/#sec-proxy-object-internal-methods-and-internal-slots-getprototypeof

Specified by:

getPrototype in interface Scriptable

Overrides:

getPrototype in class ScriptableObject

Returns:

the prototype

setPrototypeDirect

private void setPrototypeDirect(Scriptable prototype)

setPrototype

public void setPrototype(Scriptable prototype)

see https://262.ecma-international.org/12.0/#sec-proxy-object-internal-methods-and-internal-slots-setprototypeof-v

Specified by:

setPrototype in interface Scriptable

Overrides:

setPrototype in class ScriptableObject

Parameters:

prototype - the prototype to set

call

public Object call(Context cx,
 Scriptable scope,
 Scriptable thisObj,
 Object[] args)

see https://262.ecma-international.org/12.0/#sec-proxy-object-internal-methods-and-internal-slots-call-thisargument-argumentslist

Specified by:

call in interface Callable

Parameters:

cx - the current Context for this thread

scope - the scope to use to resolve properties.

thisObj - the JavaScript this object

args - the array of arguments

Returns:

the result of the call

constructor

private static NativeProxy constructor(Context cx,
 Scriptable scope,
 Object[] args)

revocable

private static Object revocable(Context cx,
 Scriptable scope,
 Scriptable thisObj,
 Object[] args)

getTrap

private Callable getTrap(String trapName)

callTrap

private Object callTrap(Callable trap,
 Object[] args)

getTargetThrowIfRevoked

ScriptableObject getTargetThrowIfRevoked()