Module org.htmlunit.corejs

Package org.htmlunit.corejs.javascript

Class LambdaFunction

java.lang.Object

org.htmlunit.corejs.javascript.SlotMapOwner<Scriptable>

org.htmlunit.corejs.javascript.ScriptableObject

org.htmlunit.corejs.javascript.BaseFunction

org.htmlunit.corejs.javascript.LambdaFunction

All Implemented Interfaces:

Serializable, Callable, ConstProperties<Scriptable>, Constructable, DebuggableObject, Function, PropHolder<Scriptable>, Scriptable, SymbolScriptable

Direct Known Subclasses:

KnownBuiltInFunction, LambdaConstructor

public class LambdaFunction
extends BaseFunction

This class implements a single JavaScript function that has the prototype of the built-in Function class, and which is implemented using a single function that can easily be implemented using a lambda expression.

See Also:

• Serialized Form

Nested Class Summary

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

ScriptableObject.DescriptorInfo, ScriptableObject.KeyComparator, ScriptableObject.LambdaGetterFunction, ScriptableObject.LambdaSetterFunction

Field Summary

Fields

Modifier and Type	Field	Description
protected final SerializableCallable	target

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

Id_arguments, Id_arity, Id_length, Id_name, Id_prototype, MAX_INSTANCE_ID

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

CONST, DONTENUM, EMPTY, LEGACY_CONST, PERMANENT, READONLY, STRICTLY_READONLY, UNINITIALIZED_CONST

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

isSealed

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

NOT_FOUND

Constructor Summary

Constructors

Constructor	Description
LambdaFunction(VarScope scope, int length, SerializableCallable target)	Create a new built-in function, with no name, and no default prototype.
LambdaFunction(VarScope scope, String name, int length, Object prototype, SerializableCallable target)	Create a new function.
LambdaFunction(VarScope scope, String name, int length, SerializableCallable target)	Create a new function.
LambdaFunction(VarScope scope, String name, int length, SerializableCallable target, boolean defaultPrototype)	Create a new function.

Method Summary

Modifier and Type	Method	Description
Object	call(Context cx, Object nt, VarScope scope, Object thisObj, Object[] args)
Scriptable	construct(Context cx, Object nt, VarScope scope, Object[] args)	Call the function as a constructor.
int	getArity()
String	getFunctionName()
int	getLength()
boolean	isConstructor()	Return whether this function can be called as a constructor.

Methods inherited from class org.htmlunit.corejs.javascript.BaseFunction

call, createObject, createObject, createProperties, createPrototypeProperty, createPrototypeProperty, defaultGet, defaultHas, defaultPut, getClassName, getClassPrototype, getDeclarationScope, getHomeObject, getPrototypeProperty, getTypeOf, hasDefaultParameters, hasInstance, hasPrototypeProperty, isGeneratorFunction, prototypeDescSetter, setHomeObject, setImmunePrototypeProperty, setPrototypeProperty, setPrototypePropertyAttributes, setStandardPropertyAttributes, setupDefaultPrototype

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

applyDescriptorToAttributeBitset, avoidObjectDetection, buildDataDescriptor, callMethod, callMethod, checkNotSealed, checkPropertyChangeForSlot, checkPropertyChangeForSlot, checkPropertyDefinition, checkPropertyDefinition, checkSlotRemoval, defineBuiltinProperty, defineBuiltinProperty, defineBuiltInProperty, defineClass, defineClass, defineClass, defineConst, defineConstProperty, defineFunctionProperties, defineOwnProperties, defineOwnProperty, defineOwnProperty, defineOwnProperty, defineProperty, defineProperty, defineProperty, defineProperty, defineProperty, defineProperty, defineProperty, defineProperty, defineProperty, defineProperty, delete, delete, delete, deleteProperty, deleteProperty, deleteProperty, ensureScriptable, ensureScriptableObject, ensureScriptableObjectButNotSymbol, ensureSymbolScriptable, ensureType, equivalentValues, get, get, getAllIds, getAncestor, getArrayPrototype, getClassPrototype, getClassPrototype, getDefaultValue, getDefaultValue, getExternalArrayData, getExternalArrayLength, getFunctionPrototype, getGeneratorFunctionPrototype, getGetterOrSetter, getGetterOrSetter, getObjectPrototype, getOwnPropertyDescriptor, getParentScope, getProperty, getProperty, getProperty, getProperty, getProperty, getPropertyIds, getPrototype, getSuperProperty, getSuperProperty, getSuperProperty, getThis, getTopLevelScope, getTopScopeValue, getTypedProperty, getTypedProperty, has, hasProperty, hasProperty, hasProperty, hasProperty, isAccessorDescriptor, isAccessorDescriptor, isConst, isDataDescriptor, isEmpty, isExtensible, isFalse, isGenericDescriptor, isGenericDescriptor, isGetterOrSetter, isGetterOrSetter, isTrue, preventExtensions, put, put, put, putConst, putConstProperty, putConstProperty, putOwnProperty, putOwnProperty, putOwnProperty, putProperty, putProperty, putProperty, putProperty, putSuperProperty, putSuperProperty, putSuperProperty, querySlot, redefineProperty, redefineProperty, sameValue, sealObject, setCommonDescriptorProperties, setExternalArrayData, setGetterOrSetter, setParentScope, setPrototype, size

Methods inherited from class org.htmlunit.corejs.javascript.SlotMapOwner

associateValue, checkNotSealed, copyAssociatedValue, createSlotMap, createSlotMap, defineProperty, defineProperty, get, get, getAssociatedValue, getAttributes, getAttributes, getAttributes, getAttributes, getAttributes, getIds, has, has, isSealed, readMaps, setAttributes, setAttributes, setAttributes, setAttributes, setAttributes, writeMaps

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.htmlunit.corejs.javascript.Constructable

construct

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

delete, delete, delete, get, get, get, getAncestor, getDefaultValue, getIds, getParentScope, getPrototype, has, has, has, put, put, put, setParentScope, setPrototype

Methods inherited from interface org.htmlunit.corejs.javascript.SymbolScriptable

get, has

Field Details

target

protected final SerializableCallable target

Constructor Details

LambdaFunction

public LambdaFunction(VarScope scope,
 String name,
 int length,
 SerializableCallable target,
 boolean defaultPrototype)

Create a new function. The new object will have the Function prototype and no parent. The caller is responsible for binding this object to the appropriate scope.

Parameters:

scope - scope of the calling context

name - name of the function

length - the arity of the function

target - an object that implements the function in Java. Since Callable is a single-function interface this will typically be implemented as a lambda.

defaultPrototype - set up a prototype on the new function

LambdaFunction

public LambdaFunction(VarScope scope,
 String name,
 int length,
 SerializableCallable target)

Create a new function. The new object will have the Function prototype and no parent. The caller is responsible for binding this object to the appropriate scope.

Parameters:

scope - scope of the calling context

name - name of the function

length - the arity of the function

target - an object that implements the function in Java. Since Callable is a single-function interface this will typically be implemented as a lambda.

LambdaFunction

public LambdaFunction(VarScope scope,
 String name,
 int length,
 Object prototype,
 SerializableCallable target)

Create a new function. The new object will have the Function prototype and no parent. The caller is responsible for binding this object to the appropriate scope.

Parameters:

scope - scope of the calling context

name - name of the function

length - the arity of the function

prototype - prototype to set for this function

target - an object that implements the function in Java. Since Callable is a single-function interface this will typically be implemented as a lambda.

LambdaFunction

public LambdaFunction(VarScope scope,
 int length,
 SerializableCallable target)

Create a new built-in function, with no name, and no default prototype.

Method Details

call

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

Overrides:

call in class BaseFunction

construct

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

Description copied from interface: Function

Call the function as a constructor.

This method is invoked by the runtime in order to satisfy a use of the JavaScript new operator. This method is expected to create a new object and return it.

If nt is equal to this then this call is equivalent `new f(...arguments), but reflection and super constructor calls may pass in different values.

Specified by:

construct in interface Constructable

Specified by:

construct in interface Function

Overrides:

construct in class BaseFunction

Parameters:

cx - the current Context for this thread

nt - the new.target for this call,

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

getLength

public int getLength()

Overrides:

getLength in class BaseFunction

getArity

public int getArity()

Overrides:

getArity in class BaseFunction

getFunctionName

public String getFunctionName()

Overrides:

getFunctionName in class BaseFunction

isConstructor

public boolean isConstructor()

Description copied from interface: Function

Return whether this function can be called as a constructor.

Specified by:

isConstructor in interface Function

Overrides:

isConstructor in class BaseFunction