Package org.mozilla.javascript

Class LambdaFunction

java.lang.Object

org.mozilla.javascript.ScriptableObject

org.mozilla.javascript.IdScriptableObject

org.mozilla.javascript.BaseFunction

org.mozilla.javascript.LambdaFunction

All Implemented Interfaces:

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

Direct Known Subclasses:

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.mozilla.javascript.ScriptableObject

ScriptableObject.KeyComparator

Field Summary

Fields

Modifier and Type	Field	Description
protected final Callable	target

Fields inherited from class org.mozilla.javascript.BaseFunction

Id_arguments, Id_arity, Id_length, Id_name, Id_prototype, MAX_INSTANCE_ID

Fields inherited from class org.mozilla.javascript.ScriptableObject

CONST, DONTENUM, EMPTY, PERMANENT, READONLY, UNINITIALIZED_CONST

Fields inherited from interface org.mozilla.javascript.Scriptable

NOT_FOUND

Constructor Summary

Constructors

Constructor	Description
LambdaFunction(Scriptable scope, int length, Callable target)	Create a new built-in function, with no name, and no default prototype.
LambdaFunction(Scriptable scope, String name, int length, Callable target)	Create a new function.

Method Summary

Modifier and Type	Method	Description
Object	call(Context cx, Scriptable scope, Scriptable thisObj, Object[] args)	Should be overridden.
Scriptable	construct(Context cx, Scriptable scope, Object[] args)	Call the function as a constructor.
int	getArity()
String	getFunctionName()
int	getLength()

Methods inherited from class org.mozilla.javascript.BaseFunction

createObject, execIdCall, fillConstructorProperties, findInstanceIdInfo, findPrototypeId, getClassName, getClassPrototype, getInstanceIdName, getInstanceIdValue, getMaxInstanceId, getPrototypeProperty, getTypeOf, hasDefaultParameters, hasInstance, hasPrototypeProperty, initPrototypeId, isGeneratorFunction, setImmunePrototypeProperty, setInstanceIdAttributes, setInstanceIdValue, setPrototypeProperty, setPrototypePropertyAttributes, setStandardPropertyAttributes, setupDefaultPrototype

Methods inherited from class org.mozilla.javascript.IdScriptableObject

activatePrototypeMap, addIdFunctionProperty, defaultGet, defaultHas, defaultPut, defineOwnProperty, delete, delete, ensureType, ensureType, exportAsJSClass, findInstanceIdInfo, findPrototypeId, get, get, getAttributes, getAttributes, getOwnPropertyDescriptor, has, has, hasPrototypeMap, initPrototypeConstructor, initPrototypeMethod, initPrototypeMethod, initPrototypeMethod, initPrototypeValue, initPrototypeValue, instanceIdInfo, put, put, setAttributes

Methods inherited from class org.mozilla.javascript.ScriptableObject

applyDescriptorToAttributeBitset, associateValue, avoidObjectDetection, buildDataDescriptor, callMethod, callMethod, checkPropertyChange, checkPropertyDefinition, defineClass, defineClass, defineClass, defineConst, defineConstProperty, defineFunctionProperties, defineOwnProperties, defineOwnProperty, defineProperty, defineProperty, defineProperty, defineProperty, defineProperty, defineProperty, defineProperty, defineProperty, delete, deleteProperty, deleteProperty, ensureScriptable, ensureScriptableObject, ensureSymbolScriptable, equivalentValues, get, get, getAllIds, getArrayPrototype, getAssociatedValue, getAttributes, getAttributes, getAttributes, getClassPrototype, getDefaultValue, getDefaultValue, getExternalArrayData, getExternalArrayLength, getFunctionPrototype, getGeneratorFunctionPrototype, getGetterOrSetter, getGetterOrSetter, getIds, getObjectPrototype, getParentScope, getProperty, getProperty, getProperty, getPropertyIds, getPrototype, getTopLevelScope, getTopScopeValue, getTypedProperty, getTypedProperty, has, hasProperty, hasProperty, hasProperty, isAccessorDescriptor, isConst, isDataDescriptor, isEmpty, isExtensible, isFalse, isGenericDescriptor, isGetterOrSetter, isSealed, isTrue, preventExtensions, put, putConst, putConstProperty, putProperty, putProperty, putProperty, querySlot, redefineProperty, sameValue, sealObject, setAttributes, setAttributes, setAttributes, setAttributes, setCommonDescriptorProperties, setExternalArrayData, setGetterOrSetter, setParentScope, setPrototype, size

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.mozilla.javascript.Scriptable

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

Field Details

target

protected final transient Callable target

Constructor Details

LambdaFunction

public LambdaFunction(Scriptable scope,
 String name,
 int length,
 Callable 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(Scriptable scope,
 int length,
 Callable target)

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

Method Details

call

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

Description copied from class: BaseFunction

Should be overridden.

Specified by:

call in interface Callable

Specified by:

call in interface Function

Overrides:

call in class BaseFunction

Parameters:

cx - the current Context for this thread

scope - the scope to execute the function relative to. This is set to the value returned by getParentScope() except when the function is called from a closure.

thisObj - the JavaScript this object

args - the array of arguments

Returns:

the result of the call

construct

public Scriptable construct(Context cx,
 Scriptable 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.

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

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