Package io.karatelabs.js

Interface ObjectLike

All Known Subinterfaces:

SimpleObject

All Known Implementing Classes:

JavaObject, JsBoolean, JsFunction, JsFunctionWrapper, JsJava, JsJson, JsPromise, JsRegex

public interface ObjectLike

Method Summary

Modifier and Type	Method	Description
Object	getMember(String name)	Raw-value accessor — returns the stored data value, or null for accessor descriptors (which have no extractable raw value).
default Object	getMember(String name, Object receiver, io.karatelabs.js.CoreContext ctx)	JS-semantic resolved read.
default ObjectLike	getPrototype()	Returns the prototype (__proto__) for prototype chain walking.
default boolean	isExtensible()
default boolean	isFrozen()
default boolean	isOwnProperty(String name)	True iff name is an own property — not inherited, not absent.
default boolean	isSealed()
void	putMember(String name, Object value)
default void	putMember(String name, Object value, io.karatelabs.js.CoreContext ctx, boolean strict)	Strict-aware [[Set]] (ES 10.4.7 OrdinarySetWithOwnDescriptor).
void	removeMember(String name)
default void	removeMember(String name, io.karatelabs.js.CoreContext ctx, boolean strict)	Strict-aware [[Delete]] (ES 13.5.1.2 / DeletePropertyOrThrow).
default void	setExtensible(boolean extensible)
default void	setFrozen(boolean frozen)
default void	setSealed(boolean sealed)
Map<String,Object>	toMap()

Method Details

getMember

Object getMember(String name)

Raw-value accessor — returns the stored data value, or null for accessor descriptors (which have no extractable raw value). Internal map / Java-interop callers (toMap, Map.get, jsEntries) and subclass super.getMember(name) chains use this.

For JS-semantic reads that must invoke an accessor's getter, use getMember(String, Object, CoreContext) instead.

getMember

default Object getMember(String name,
 Object receiver,
 io.karatelabs.js.CoreContext ctx)

JS-semantic resolved read. For data descriptors returns the value; for accessor descriptors invokes the getter with receiver bound as this. receiver is the object the property is being read on (may differ from this when walking a prototype chain). ctx threads through to the getter call. Default delegates to getMember(String) — implementations with accessor storage (JsObject, JsArray) override.

putMember

void putMember(String name,
 Object value)

putMember

default void putMember(String name,
 Object value,
 io.karatelabs.js.CoreContext ctx,
 boolean strict)

Strict-aware [[Set]] (ES 10.4.7 OrdinarySetWithOwnDescriptor). Same store as putMember(String, Object), but when the write is rejected — frozen object, non-extensible new key, non-writable data property, or a get-only accessor — a sloppy caller gets the silent no-op while a strict caller gets a JsErrorException TypeError. ctx threads through for accessor setters.

Default delegates to the lenient putMember(String, Object) — host bridges that don't model property attributes are perpetually writable, so there is nothing to reject. JsObject / JsArray override to enforce.

removeMember

void removeMember(String name)

removeMember

default void removeMember(String name,
 io.karatelabs.js.CoreContext ctx,
 boolean strict)

Strict-aware [[Delete]] (ES 13.5.1.2 / DeletePropertyOrThrow). Same removal as removeMember(String), but a non-configurable own property is a silent no-op for a sloppy caller and a TypeError for a strict caller. Default delegates to the lenient removeMember(String); JsObject / JsArray override to enforce.

toMap

Map<String,Object> toMap()

getPrototype

default ObjectLike getPrototype()

Returns the prototype (__proto__) for prototype chain walking. Default returns null (no prototype chain).

isOwnProperty

default boolean isOwnProperty(String name)

True iff name is an own property — not inherited, not absent. Default reads toMap() which works for any host ObjectLike; JsObject / JsArray / Prototype override with tighter implementations that distinguish tombstones from absent keys and intrinsic-installed entries.

isExtensible

default boolean isExtensible()

isSealed

default boolean isSealed()

isFrozen

default boolean isFrozen()

setExtensible

default void setExtensible(boolean extensible)

setSealed

default void setSealed(boolean sealed)

setFrozen

default void setFrozen(boolean frozen)