Package io.karatelabs.js

Class JsUndefined

java.lang.Object

io.karatelabs.js.JsUndefined

All Implemented Interfaces:

JsValue

public final class JsUndefined
extends Object
implements JsValue

Singleton representing JavaScript's undefined value.

Implements JsValue so it's handled uniformly with other JS types. getJavaValue() returns null for Java interop.

Field Summary

Fields

Modifier and Type	Field	Description
static final JsUndefined	INSTANCE

Method Summary

Modifier and Type	Method	Description
Object	getJavaValue()	Returns the idiomatic Java representation of this object.
Object	getJsValue()	Returns the raw internal value for use in JS operations (comparison, arithmetic, etc.).
String	toString()

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.karatelabs.js.JsValue

getOriginalJavaValue

Field Details

INSTANCE

public static final JsUndefined INSTANCE

Method Details

getJavaValue

public Object getJavaValue()

Description copied from interface: JsValue

Returns the idiomatic Java representation of this object. Used when values leave the JS engine and need to be consumed by Java code.

Examples: JsNumber → Number, JsDate → Date, JsUint8Array → byte[]

Specified by:

getJavaValue in interface JsValue

getJsValue

public Object getJsValue()

Description copied from interface: JsValue

Returns the raw internal value for use in JS operations (comparison, arithmetic, etc.). This enables a consistent "unwrap first, then switch on raw types" pattern.

Examples: JsNumber → Number, JsDate → Long (millis), JsUint8Array → byte[]

Default implementation delegates to JsValue.getJavaValue() which is correct for most types. Override when internal representation differs from external (e.g., JsDate stores long millis).

Specified by:

getJsValue in interface JsValue

toString

public String toString()

Overrides:

toString in class Object