Package org.mozilla.javascript

Class BaseFunction

java.lang.Object

org.mozilla.javascript.ScriptableObject

org.mozilla.javascript.IdScriptableObject

org.mozilla.javascript.BaseFunction

All Implemented Interfaces:

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

Direct Known Subclasses:

BoundFunction, FunctionObject, IdFunctionObject, NativeFunction, NativeJavaConstructor, NativeJavaMethod, Require

public class BaseFunction
extends IdScriptableObject
implements Function

The base class for Function objects See ECMA 15.3.

See Also:

• Serialized Form

Field Summary

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
BaseFunction()
BaseFunction(Scriptable scope, Scriptable prototype)

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.
Scriptable	createObject(Context cx, Scriptable scope)	Creates new script object.
Object	execIdCall(IdFunctionObject f, Context cx, Scriptable scope, Scriptable thisObj, Object[] args)	'thisObj' will be null if invoked as constructor, in which case instance of Scriptable should be returned.
int	getArity()
String	getClassName()	Return the name of the class.
String	getFunctionName()
int	getLength()
String	getTypeOf()	Gets the value returned by calling the typeof operator on this object.
boolean	hasInstance(Scriptable instance)	Implements the instanceof operator for JavaScript Function objects.
void	setImmunePrototypeProperty(Object value)	Make value as DontEnum, DontDelete, ReadOnly prototype property of this Function object

Methods inherited from class org.mozilla.javascript.IdScriptableObject

activatePrototypeMap, defineOwnProperty, delete, exportAsJSClass, get, getAttributes, has, hasPrototypeMap, initPrototypeConstructor, initPrototypeMethod, initPrototypeValue, put, setAttributes

Methods inherited from class org.mozilla.javascript.ScriptableObject

associateValue, avoidObjectDetection, callMethod, callMethod, defineClass, defineClass, defineClass, defineConst, defineConstProperty, defineFunctionProperties, defineOwnProperties, defineProperty, defineProperty, defineProperty, defineProperty, delete, deleteProperty, deleteProperty, get, get, getAllIds, getArrayPrototype, getAssociatedValue, getAttributes, getAttributes, getAttributes, getClassPrototype, getDefaultValue, getDefaultValue, getExternalArrayData, getExternalArrayLength, getFunctionPrototype, getGetterOrSetter, getIds, getObjectPrototype, getParentScope, getProperty, getProperty, getPropertyIds, getPrototype, getTopLevelScope, getTopScopeValue, getTypedProperty, getTypedProperty, has, hasProperty, hasProperty, isConst, isEmpty, isExtensible, isSealed, preventExtensions, put, putConst, putConstProperty, putProperty, putProperty, redefineProperty, sealObject, setAttributes, setAttributes, setAttributes, setExternalArrayData, setGetterOrSetter, setParentScope, setPrototype, size

Methods inherited from class java.lang.Object

equals, 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

Constructor Details

BaseFunction

public BaseFunction()

BaseFunction

public BaseFunction(Scriptable scope,
 Scriptable prototype)

Method Details

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

getTypeOf

public String getTypeOf()

Gets the value returned by calling the typeof operator on this object.

Overrides:

getTypeOf in class ScriptableObject

Returns:

"function" or "undefined" if ScriptableObject.avoidObjectDetection() returns true

See Also:

• ScriptableObject.getTypeOf()

hasInstance

public boolean hasInstance(Scriptable instance)

Implements the instanceof operator for JavaScript Function objects.

foo = new Foo();
foo instanceof Foo; // true


Specified by:

hasInstance in interface Scriptable

Overrides:

hasInstance in class ScriptableObject

Parameters:

instance - The value that appeared on the LHS of the instanceof operator

Returns:

true if the "prototype" property of "this" appears in value's prototype chain

execIdCall

public Object execIdCall(IdFunctionObject f,
 Context cx,
 Scriptable scope,
 Scriptable thisObj,
 Object[] args)

Description copied from class: IdScriptableObject

'thisObj' will be null if invoked as constructor, in which case instance of Scriptable should be returned.

Specified by:

execIdCall in interface IdFunctionCall

Overrides:

execIdCall in class IdScriptableObject

setImmunePrototypeProperty

public void setImmunePrototypeProperty(Object value)

Make value as DontEnum, DontDelete, ReadOnly prototype property of this Function object

call

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

Should be overridden.

Specified by:

call in interface Callable

Specified by:

call in interface Function

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 Function

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

createObject

public Scriptable createObject(Context cx,
 Scriptable scope)

Creates new script object. The default implementation of construct(org.mozilla.javascript.Context, org.mozilla.javascript.Scriptable, java.lang.Object[]) uses the method to to get the value for thisObj argument when invoking call(org.mozilla.javascript.Context, org.mozilla.javascript.Scriptable, org.mozilla.javascript.Scriptable, java.lang.Object[]). The methos is allowed to return null to indicate that call(org.mozilla.javascript.Context, org.mozilla.javascript.Scriptable, org.mozilla.javascript.Scriptable, java.lang.Object[]) will create a new object itself. In this case construct(org.mozilla.javascript.Context, org.mozilla.javascript.Scriptable, java.lang.Object[]) will set scope and prototype on the result call(org.mozilla.javascript.Context, org.mozilla.javascript.Scriptable, org.mozilla.javascript.Scriptable, java.lang.Object[]) unless they are already set.

getArity

public int getArity()

getLength

public int getLength()

getFunctionName

public String getFunctionName()