Function (Rhino)
Keywords: org.mozilla.javascript.Function interface

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## org.mozilla.javascript
Interface Function

All Superinterfaces:
  Callable, Scriptable

All Known Implementing Classes:
  org.mozilla.javascript.BaseFunction, org.mozilla.javascript.Delegator

public interface Function
extends Scriptable, Callable

This is interface that all functions in JavaScript must implement. The interface provides for calling functions and constructors.

Author:
  Norris Boyd
See Also:
  `Scriptable`

Field Summary

Fields inherited from interface org.mozilla.javascript.Scriptable
`NOT_FOUND`

Method Summary
`java.lang.Object` | `call(Context cx, Scriptable scope, Scriptable thisObj, java.lang.Object[] args)` Call the function.
`Scriptable` | `construct(Context cx, Scriptable scope, java.lang.Object[] args)` Call the function as a constructor.

Methods inherited from interface org.mozilla.javascript.Scriptable
`delete, delete, get, get, getClassName, getDefaultValue, getIds, getParentScope, getPrototype, has, has, hasInstance, put, put, setParentScope, setPrototype`

Method Detail

### call

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

  Call the function. Note that the array of arguments is not guaranteed to have length greater than 0.

  Specified by:
    `call` in interface `Callable`
  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,
                                java.lang.Object[] args)

  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.

  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

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