Package org.mozilla.javascript
Class BaseFunction
- java.lang.Object
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- org.mozilla.javascript.ScriptableObject
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- org.mozilla.javascript.IdScriptableObject
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- org.mozilla.javascript.BaseFunction
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- All Implemented Interfaces:
java.io.Serializable
,Callable
,ConstProperties
,DebuggableObject
,Function
,IdFunctionCall
,Scriptable
,SymbolScriptable
- Direct Known Subclasses:
Arguments.ThrowTypeError
,ArrowFunction
,BoundFunction
,FunctionObject
,IdFunctionObject
,NativeFunction
,NativeJavaConstructor
,NativeJavaMethod
,NativeRegExpCtor
,NativeScript
,Require
public class BaseFunction extends IdScriptableObject implements Function
The base class for Function objects. That is one of two purposes. It is also the prototype for every "function" defined except those that are used as GeneratorFunctions via the ES6 "function *" syntax. See ECMA 15.3.- See Also:
- Serialized Form
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Nested Class Summary
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Nested classes/interfaces inherited from class org.mozilla.javascript.ScriptableObject
ScriptableObject.GetterSlot, ScriptableObject.KeyComparator, ScriptableObject.Slot, ScriptableObject.SlotAccess
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Field Summary
Fields Modifier and Type Field Description private int
argumentsAttributes
private java.lang.Object
argumentsObj
private static java.lang.String
FUNCTION_CLASS
private static java.lang.Object
FUNCTION_TAG
(package private) static java.lang.String
GENERATOR_FUNCTION_CLASS
private static int
Id_apply
private static int
Id_arguments
private static int
Id_arity
private static int
Id_bind
private static int
Id_call
private static int
Id_constructor
private static int
Id_length
private static int
Id_name
private static int
Id_prototype
private static int
Id_toSource
private static int
Id_toString
private boolean
isGeneratorFunction
private static int
MAX_INSTANCE_ID
private static int
MAX_PROTOTYPE_ID
private java.lang.Object
prototypeProperty
private int
prototypePropertyAttributes
private static long
serialVersionUID
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Fields inherited from class org.mozilla.javascript.ScriptableObject
CONST, DONTENUM, EMPTY, PERMANENT, READONLY, UNINITIALIZED_CONST
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Fields inherited from interface org.mozilla.javascript.Scriptable
NOT_FOUND
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Constructor Summary
Constructors Constructor Description BaseFunction()
BaseFunction(boolean isGenerator)
BaseFunction(Scriptable scope, Scriptable prototype)
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description java.lang.Object
call(Context cx, Scriptable scope, Scriptable thisObj, java.lang.Object[] args)
Should be overridden.Scriptable
construct(Context cx, Scriptable scope, java.lang.Object[] args)
Call the function as a constructor.Scriptable
createObject(Context cx, Scriptable scope)
Creates new script object.(package private) java.lang.String
decompile(int indent, int flags)
Decompile the source information associated with this js function/script back into a string.java.lang.Object
execIdCall(IdFunctionObject f, Context cx, Scriptable scope, Scriptable thisObj, java.lang.Object[] args)
'thisObj' will be null if invoked as constructor, in which case instance of Scriptable should be returned.protected void
fillConstructorProperties(IdFunctionObject ctor)
protected int
findInstanceIdInfo(java.lang.String s)
Map name to id of instance property.protected int
findPrototypeId(java.lang.String s)
private java.lang.Object
getArguments()
int
getArity()
java.lang.String
getClassName()
Return the name of the class.protected Scriptable
getClassPrototype()
java.lang.String
getFunctionName()
protected java.lang.String
getInstanceIdName(int id)
Map id back to property name it defines.protected java.lang.Object
getInstanceIdValue(int id)
Get id value.int
getLength()
protected int
getMaxInstanceId()
Get maximum id findInstanceIdInfo can generate.protected java.lang.Object
getPrototypeProperty()
java.lang.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.protected boolean
hasPrototypeProperty()
(package private) static void
init(Scriptable scope, boolean sealed)
(package private) static java.lang.Object
initAsGeneratorFunction(Scriptable scope, boolean sealed)
protected void
initPrototypeId(int id)
(package private) static boolean
isApply(IdFunctionObject f)
(package private) static boolean
isApplyOrCall(IdFunctionObject f)
protected boolean
isGeneratorFunction()
private java.lang.Object
jsConstructor(Context cx, Scriptable scope, java.lang.Object[] args)
private static BaseFunction
realFunction(Scriptable thisObj, IdFunctionObject f)
void
setImmunePrototypeProperty(java.lang.Object value)
Make value as DontEnum, DontDelete, ReadOnly prototype property of this Function objectprotected void
setInstanceIdAttributes(int id, int attr)
Update the attributes of the given instance property.protected void
setInstanceIdValue(int id, java.lang.Object value)
Set or delete id value.private java.lang.Object
setupDefaultPrototype()
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Methods inherited from class org.mozilla.javascript.IdScriptableObject
activatePrototypeMap, addIdFunctionProperty, defaultGet, defaultHas, defaultPut, defineOwnProperty, delete, delete, exportAsJSClass, findInstanceIdInfo, findPrototypeId, get, get, getAttributes, getAttributes, getIds, getOwnPropertyDescriptor, has, has, hasPrototypeMap, incompatibleCallError, initPrototypeConstructor, initPrototypeMethod, initPrototypeMethod, initPrototypeMethod, initPrototypeValue, initPrototypeValue, instanceIdInfo, put, put, setAttributes
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Methods inherited from class org.mozilla.javascript.ScriptableObject
addLazilyInitializedValue, applyDescriptorToAttributeBitset, associateValue, avoidObjectDetection, buildClassCtor, buildDataDescriptor, callMethod, callMethod, checkPropertyChange, checkPropertyDefinition, checkValidAttributes, defineClass, defineClass, defineClass, defineConst, defineConstProperty, defineFunctionProperties, defineOwnProperties, defineOwnProperty, 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, getIds, getObjectPrototype, getParentScope, getProperty, getProperty, getProperty, getPropertyIds, getPrototype, getSlot, 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, redefineProperty, sameValue, sealObject, setAttributes, setAttributes, setAttributes, setAttributes, setExternalArrayData, setGetterOrSetter, setParentScope, setPrototype, size
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Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Methods inherited from interface org.mozilla.javascript.Scriptable
delete, delete, get, get, getDefaultValue, getIds, getParentScope, getPrototype, has, has, put, put, setParentScope, setPrototype
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Field Detail
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serialVersionUID
private static final long serialVersionUID
- See Also:
- Constant Field Values
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FUNCTION_TAG
private static final java.lang.Object FUNCTION_TAG
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FUNCTION_CLASS
private static final java.lang.String FUNCTION_CLASS
- See Also:
- Constant Field Values
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GENERATOR_FUNCTION_CLASS
static final java.lang.String GENERATOR_FUNCTION_CLASS
- See Also:
- Constant Field Values
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Id_length
private static final int Id_length
- See Also:
- Constant Field Values
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Id_arity
private static final int Id_arity
- See Also:
- Constant Field Values
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Id_name
private static final int Id_name
- See Also:
- Constant Field Values
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Id_prototype
private static final int Id_prototype
- See Also:
- Constant Field Values
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Id_arguments
private static final int Id_arguments
- See Also:
- Constant Field Values
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MAX_INSTANCE_ID
private static final int MAX_INSTANCE_ID
- See Also:
- Constant Field Values
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Id_constructor
private static final int Id_constructor
- See Also:
- Constant Field Values
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Id_toString
private static final int Id_toString
- See Also:
- Constant Field Values
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Id_toSource
private static final int Id_toSource
- See Also:
- Constant Field Values
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Id_apply
private static final int Id_apply
- See Also:
- Constant Field Values
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Id_call
private static final int Id_call
- See Also:
- Constant Field Values
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Id_bind
private static final int Id_bind
- See Also:
- Constant Field Values
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MAX_PROTOTYPE_ID
private static final int MAX_PROTOTYPE_ID
- See Also:
- Constant Field Values
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prototypeProperty
private java.lang.Object prototypeProperty
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argumentsObj
private java.lang.Object argumentsObj
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isGeneratorFunction
private boolean isGeneratorFunction
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prototypePropertyAttributes
private int prototypePropertyAttributes
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argumentsAttributes
private int argumentsAttributes
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Constructor Detail
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BaseFunction
public BaseFunction()
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BaseFunction
public BaseFunction(boolean isGenerator)
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BaseFunction
public BaseFunction(Scriptable scope, Scriptable prototype)
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Method Detail
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init
static void init(Scriptable scope, boolean sealed)
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initAsGeneratorFunction
static java.lang.Object initAsGeneratorFunction(Scriptable scope, boolean sealed)
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getClassName
public java.lang.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 interfaceScriptable
- Specified by:
getClassName
in classScriptableObject
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isGeneratorFunction
protected boolean isGeneratorFunction()
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getTypeOf
public java.lang.String getTypeOf()
Gets the value returned by calling the typeof operator on this object.- Overrides:
getTypeOf
in classScriptableObject
- Returns:
- "function" or "undefined" if
ScriptableObject.avoidObjectDetection()
returnstrue
- See Also:
ScriptableObject.getTypeOf()
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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 interfaceScriptable
- Overrides:
hasInstance
in classScriptableObject
- 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
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getMaxInstanceId
protected int getMaxInstanceId()
Description copied from class:IdScriptableObject
Get maximum id findInstanceIdInfo can generate.- Overrides:
getMaxInstanceId
in classIdScriptableObject
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findInstanceIdInfo
protected int findInstanceIdInfo(java.lang.String s)
Description copied from class:IdScriptableObject
Map name to id of instance property. Should return 0 if not found or the result ofIdScriptableObject.instanceIdInfo(int, int)
.- Overrides:
findInstanceIdInfo
in classIdScriptableObject
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getInstanceIdName
protected java.lang.String getInstanceIdName(int id)
Description copied from class:IdScriptableObject
Map id back to property name it defines.- Overrides:
getInstanceIdName
in classIdScriptableObject
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getInstanceIdValue
protected java.lang.Object getInstanceIdValue(int id)
Description copied from class:IdScriptableObject
Get id value. If id value is constant, descendant can call cacheIdValue to store value in the permanent cache. Default implementation creates IdFunctionObject instance for given id and cache its value- Overrides:
getInstanceIdValue
in classIdScriptableObject
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setInstanceIdValue
protected void setInstanceIdValue(int id, java.lang.Object value)
Description copied from class:IdScriptableObject
Set or delete id value. If value == NOT_FOUND , the implementation should make sure that the following getInstanceIdValue return NOT_FOUND.- Overrides:
setInstanceIdValue
in classIdScriptableObject
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setInstanceIdAttributes
protected void setInstanceIdAttributes(int id, int attr)
Description copied from class:IdScriptableObject
Update the attributes of the given instance property. Classes which want to support changing property attributes via Object.defineProperty must override this method. The default implementation throws InternalError.- Overrides:
setInstanceIdAttributes
in classIdScriptableObject
- Parameters:
id
- the instance property idattr
- the new attribute bitset
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fillConstructorProperties
protected void fillConstructorProperties(IdFunctionObject ctor)
- Overrides:
fillConstructorProperties
in classIdScriptableObject
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initPrototypeId
protected void initPrototypeId(int id)
- Overrides:
initPrototypeId
in classIdScriptableObject
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isApply
static boolean isApply(IdFunctionObject f)
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isApplyOrCall
static boolean isApplyOrCall(IdFunctionObject f)
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execIdCall
public java.lang.Object execIdCall(IdFunctionObject f, Context cx, Scriptable scope, Scriptable thisObj, java.lang.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 interfaceIdFunctionCall
- Overrides:
execIdCall
in classIdScriptableObject
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realFunction
private static BaseFunction realFunction(Scriptable thisObj, IdFunctionObject f)
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setImmunePrototypeProperty
public void setImmunePrototypeProperty(java.lang.Object value)
Make value as DontEnum, DontDelete, ReadOnly prototype property of this Function object
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getClassPrototype
protected Scriptable getClassPrototype()
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call
public java.lang.Object call(Context cx, Scriptable scope, Scriptable thisObj, java.lang.Object[] args)
Should be overridden.- Specified by:
call
in interfaceCallable
- Specified by:
call
in interfaceFunction
- Parameters:
cx
- the current Context for this threadscope
- 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 JavaScriptthis
objectargs
- the array of arguments- Returns:
- the result of the call
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construct
public Scriptable construct(Context cx, Scriptable scope, java.lang.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 JavaScriptnew
operator. This method is expected to create a new object and return it.
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createObject
public Scriptable createObject(Context cx, Scriptable scope)
Creates new script object. The default implementation ofconstruct(org.mozilla.javascript.Context, org.mozilla.javascript.Scriptable, java.lang.Object[])
uses the method to to get the value forthisObj
argument when invokingcall(org.mozilla.javascript.Context, org.mozilla.javascript.Scriptable, org.mozilla.javascript.Scriptable, java.lang.Object[])
. The methos is allowed to returnnull
to indicate thatcall(org.mozilla.javascript.Context, org.mozilla.javascript.Scriptable, org.mozilla.javascript.Scriptable, java.lang.Object[])
will create a new object itself. In this caseconstruct(org.mozilla.javascript.Context, org.mozilla.javascript.Scriptable, java.lang.Object[])
will set scope and prototype on the resultcall(org.mozilla.javascript.Context, org.mozilla.javascript.Scriptable, org.mozilla.javascript.Scriptable, java.lang.Object[])
unless they are already set.
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decompile
java.lang.String decompile(int indent, int flags)
Decompile the source information associated with this js function/script back into a string.- Parameters:
indent
- How much to indent the decompiled result.flags
- Flags specifying format of decompilation output.
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getArity
public int getArity()
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getLength
public int getLength()
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getFunctionName
public java.lang.String getFunctionName()
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hasPrototypeProperty
protected boolean hasPrototypeProperty()
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getPrototypeProperty
protected java.lang.Object getPrototypeProperty()
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setupDefaultPrototype
private java.lang.Object setupDefaultPrototype()
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getArguments
private java.lang.Object getArguments()
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jsConstructor
private java.lang.Object jsConstructor(Context cx, Scriptable scope, java.lang.Object[] args)
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findPrototypeId
protected int findPrototypeId(java.lang.String s)
- Overrides:
findPrototypeId
in classIdScriptableObject
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