Class AbstractJSObject

java.lang.Object
org.openjdk.nashorn.api.scripting.AbstractJSObject
All Implemented Interfaces:
JSObject
Direct Known Subclasses:
ScriptObjectMirror
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 Details

    • AbstractJSObject

      public AbstractJSObject()
      The default constructor.

  • Method Details

    • 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
      Implementation Requirements:
      This implementation always throws UnsupportedOperationException

    • 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
      Implementation Requirements:
      This implementation always throws UnsupportedOperationException

    • 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
      Implementation Requirements:
      This imlementation always throws UnsupportedOperationException

    • 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
      Implementation Requirements:
      This implementation always returns null

    • 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
      Implementation Requirements:
      This implementation always returns null

    • 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
      Implementation Requirements:
      This implementation always returns false

    • 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
      Implementation Requirements:
      This implementation always returns false

    • 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
      Implementation Requirements:
      This implementation is a no-op

    • 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
      Implementation Requirements:
      This implementation is a no-op

    • 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
      Implementation Requirements:
      This implementation is a no-op

    • 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
      Implementation Requirements:
      This implementation returns empty set

    • 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.
      Implementation Requirements:
      This implementation returns empty set

    • 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
      Implementation Requirements:
      This implementation always returns false

    • 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
      Implementation Requirements:
      This implementation always returns false

    • 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
      Implementation Requirements:
      This implementation always returns false

    • 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
      Implementation Requirements:
      This implementation always returns false

    • toNumber

      @Deprecated public double toNumber()
      Deprecated.
      use JSObject.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

      @Deprecated public static Object getDefaultValue(JSObject jsobj, Class<?> hint)
      Deprecated.
      use JSObject.getDefaultValue(Class) instead.
      When passed an AbstractJSObject, invokes its JSObject.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.