AbstractJSObject (Nashorn API )

java.lang.Object
- jdk.nashorn.api.scripting.AbstractJSObject

All Implemented Interfaces:

JSObject

Direct Known Subclasses:

ScriptObjectMirror
```
@Exported
public abstract class AbstractJSObject
extends Object
implements JSObject
```
This is the base class for nashorn ScriptObjectMirror class. This class can also be subclassed by an arbitrary Java class. Nashorn will treat objects of such classes just like nashorn script objects. Usual nashorn operations like obj[i], obj.foo, obj.func(), delete obj.foo will be delegated to appropriate method call of this class.

Since:

1.8u40

Constructor Summary

Constructors
Constructor and Description

AbstractJSObject()
The default constructor.

Constructors
Constructor and Description
`AbstractJSObject()` The default constructor.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods Deprecated Methods
Modifier and Type	Method and Description
`Object`	`call(Object thiz, Object... args)` Call this object as a JavaScript function.
`Object`	`eval(String s)` Evaluate a JavaScript expression.
`String`	`getClassName()` ECMA [[Class]] property
`Object`	`getDefaultValue(Class<?> hint)` Implements this object's `[[DefaultValue]]` method.
`static Object`	`getDefaultValue(JSObject jsobj, Class<?> hint)` When passed an `AbstractJSObject`, invokes its `getDefaultValue(Class)` method.
`Object`	`getMember(String name)` Retrieves a named member of this JavaScript object.
`Object`	`getSlot(int index)` Retrieves an indexed member of this JavaScript object.
`boolean`	`hasMember(String name)` Does this object have a named member?
`boolean`	`hasSlot(int slot)` Does this object have a indexed property?
`boolean`	`isArray()` Is this an array object?
`boolean`	`isFunction()` Is this a function object?
`boolean`	`isInstance(Object instance)` Checking whether the given object is an instance of 'this' object.
`boolean`	`isInstanceOf(Object clazz)` Checking whether this object is an instance of the given 'clazz' object.
`boolean`	`isStrictFunction()` Is this a 'use strict' function object?
`Set<String>`	`keySet()` Returns the set of all property names of this object.
`Object`	`newObject(Object... args)` Call this 'constructor' JavaScript function to create a new object.
`void`	`removeMember(String name)` Remove a named member from this JavaScript object
`void`	`setMember(String name, Object value)` Set a named member in this JavaScript object
`void`	`setSlot(int index, Object value)` Set an indexed member in this JavaScript object
`double`	`toNumber()` Deprecated. use `getDefaultValue(Class)` with `Number` hint instead.
`Collection<Object>`	`values()` Returns the set of all property values of this object.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - AbstractJSObject
```
public AbstractJSObject()
```
    The default constructor.
- Method Detail
  - call
```
public Object call(Object thiz,
                   Object... args)
```
    Description copied from interface: JSObject
    
    Call this object as a JavaScript function. This is equivalent to 'func.apply(thiz, args)' in JavaScript.
    
    Specified by:
    
    call in interface JSObject
    
    Parameters:
    
    thiz - 'this' object to be passed to the function. This may be null.
    
    args - arguments to method
    
    Returns:
    
    result of call
  - newObject
```
public Object newObject(Object... args)
```
    Description copied from interface: JSObject
    
    Call this 'constructor' JavaScript function to create a new object. This is equivalent to 'new func(arg1, arg2...)' in JavaScript.
    
    Specified by:
    
    newObject in interface JSObject
    
    Parameters:
    
    args - arguments to method
    
    Returns:
    
    result of constructor call
  - eval
```
public Object eval(String s)
```
    Description copied from interface: JSObject
    
    Evaluate a JavaScript expression.
    
    Specified by:
    
    eval in interface JSObject
    
    Parameters:
    
    s - JavaScript expression to evaluate
    
    Returns:
    
    evaluation result
  - getMember
```
public Object getMember(String name)
```
    Description copied from interface: JSObject
    
    Retrieves a named member of this JavaScript object.
    
    Specified by:
    
    getMember in interface JSObject
    
    Parameters:
    
    name - of member
    
    Returns:
    
    member
  - getSlot
```
public Object getSlot(int index)
```
    Description copied from interface: JSObject
    
    Retrieves an indexed member of this JavaScript object.
    
    Specified by:
    
    getSlot in interface JSObject
    
    Parameters:
    
    index - index slot to retrieve
    
    Returns:
    
    member
  - hasMember
```
public boolean hasMember(String name)
```
    Description copied from interface: JSObject
    
    Does this object have a named member?
    
    Specified by:
    
    hasMember in interface JSObject
    
    Parameters:
    
    name - name of member
    
    Returns:
    
    true if this object has a member of the given name
  - hasSlot
```
public boolean hasSlot(int slot)
```
    Description copied from interface: JSObject
    
    Does this object have a indexed property?
    
    Specified by:
    
    hasSlot in interface JSObject
    
    Parameters:
    
    slot - index to check
    
    Returns:
    
    true if this object has a slot
  - removeMember
```
public void removeMember(String name)
```
    Description copied from interface: JSObject
    
    Remove a named member from this JavaScript object
    
    Specified by:
    
    removeMember in interface JSObject
    
    Parameters:
    
    name - name of the member
  - setMember
```
public void setMember(String name,
                      Object value)
```
    Description copied from interface: JSObject
    
    Set a named member in this JavaScript object
    
    Specified by:
    
    setMember in interface JSObject
    
    Parameters:
    
    name - name of the member
    
    value - value of the member
  - setSlot
```
public void setSlot(int index,
                    Object value)
```
    Description copied from interface: JSObject
    
    Set an indexed member in this JavaScript object
    
    Specified by:
    
    setSlot in interface JSObject
    
    Parameters:
    
    index - index of the member slot
    
    value - value of the member
  - keySet
```
public Set<String> keySet()
```
    Description copied from interface: JSObject
    
    Returns the set of all property names of this object.
    
    Specified by:
    
    keySet in interface JSObject
    
    Returns:
    
    set of property names
  - values
```
public Collection<Object> values()
```
    Description copied from interface: JSObject
    
    Returns the set of all property values of this object.
    
    Specified by:
    
    values in interface JSObject
    
    Returns:
    
    set of property values.
  - isInstance
```
public boolean isInstance(Object instance)
```
    Description copied from interface: JSObject
    
    Checking whether the given object is an instance of 'this' object.
    
    Specified by:
    
    isInstance in interface JSObject
    
    Parameters:
    
    instance - instance to check
    
    Returns:
    
    true if the given 'instance' is an instance of this 'function' object
  - isInstanceOf
```
public boolean isInstanceOf(Object clazz)
```
    Description copied from interface: JSObject
    
    Checking whether this object is an instance of the given 'clazz' object.
    
    Specified by:
    
    isInstanceOf in interface JSObject
    
    Parameters:
    
    clazz - clazz to check
    
    Returns:
    
    true if this object is an instance of the given 'clazz'
  - getClassName
```
public String getClassName()
```
    Description copied from interface: JSObject
    
    ECMA [[Class]] property
    
    Specified by:
    
    getClassName in interface JSObject
    
    Returns:
    
    ECMA [[Class]] property value of this object
  - isFunction
```
public boolean isFunction()
```
    Description copied from interface: JSObject
    
    Is this a function object?
    
    Specified by:
    
    isFunction in interface JSObject
    
    Returns:
    
    if this mirror wraps a ECMAScript function instance
  - isStrictFunction
```
public boolean isStrictFunction()
```
    Description copied from interface: JSObject
    
    Is this a 'use strict' function object?
    
    Specified by:
    
    isStrictFunction in interface JSObject
    
    Returns:
    
    true if this mirror represents a ECMAScript 'use strict' function
  - isArray
```
public boolean isArray()
```
    Description copied from interface: JSObject
    
    Is this an array object?
    
    Specified by:
    
    isArray in interface JSObject
    
    Returns:
    
    if this mirror wraps a ECMAScript array object
  - toNumber
```
@Deprecated
public double toNumber()
```
    Deprecated. use getDefaultValue(Class) with Number hint instead.
    
    Returns this object's numeric value.
    
    Specified by:
    
    toNumber in interface JSObject
    
    Returns:
    
    this object's numeric value.
  - getDefaultValue
```
public Object getDefaultValue(Class<?> hint)
```
    Implements this object's [[DefaultValue]] method. The default implementation follows ECMAScript 5.1 section 8.6.2 but subclasses are free to provide their own implementations.
    
    Parameters:
    
    hint - the type hint. Should be either null, Number.class or String.class.
    
    Returns:
    
    this object's default value.
    
    Throws:
    
    UnsupportedOperationException - if the conversion can't be performed. The engine will convert this exception into a JavaScript TypeError.
  - getDefaultValue
```
public static Object getDefaultValue(JSObject jsobj,
                                     Class<?> hint)
```
    When passed an AbstractJSObject, invokes its getDefaultValue(Class) method. When passed any other JSObject, it will obtain its [[DefaultValue]] method as per ECMAScript 5.1 section 8.6.2.
    
    Parameters:
    
    jsobj - the JSObject whose [[DefaultValue]] is obtained.
    
    hint - the type hint. Should be either null, Number.class or String.class.
    
    Returns:
    
    this object's default value.
    
    Throws:
    
    UnsupportedOperationException - if the conversion can't be performed. The engine will convert this exception into a JavaScript TypeError.

Class AbstractJSObject

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

AbstractJSObject

Method Detail

call

newObject

eval

getMember

getSlot

hasMember

hasSlot

removeMember

setMember

setSlot

keySet

values

isInstance

isInstanceOf

getClassName

isFunction

isStrictFunction

isArray

toNumber

getDefaultValue

getDefaultValue