Package Summary Overview Summary

### class:Invocable [NONE]
-     public interface Invocable
The optional interface implemented by ScriptEngines whose methods allow the invocation of procedures in scripts that have previously been executed. Since: 1.6

### method:invokeMethod(java.lang.Object, java.lang.String, java.lang.Object...) [NONE]
- #### invokeMethod
      Object invokeMethod(Object thiz,
                          String name,
                          Object... args)
                   throws ScriptException,
                          NoSuchMethodException
Calls a method on a script object compiled during a previous script execution, which is retained in the state of the `ScriptEngine`. Parameters: `name` - The name of the procedure to be called. `thiz` - If the procedure is a member of a class defined in the script and thiz is an instance of that class returned by a previous execution or invocation, the named method is called through that instance. `args` - Arguments to pass to the procedure. The rules for converting the arguments to scripting variables are implementation-specific. Returns: The value returned by the procedure. The rules for converting the scripting variable returned by the script method to a Java Object are implementation-specific. Throws: `ScriptException` - if an error occurs during invocation of the method. `NoSuchMethodException` - if method with given name or matching argument types cannot be found. `NullPointerException` - if the method name is null. `IllegalArgumentException` - if the specified thiz is null or the specified Object is does not represent a scripting object.

### method:invokeFunction(java.lang.String, java.lang.Object...) [NONE]
- #### invokeFunction
      Object invokeFunction(String name,
                            Object... args)
                     throws ScriptException,
                            NoSuchMethodException
Used to call top-level procedures and functions defined in scripts. Parameters: `name` - of the procedure or function to call `args` - Arguments to pass to the procedure or function Returns: The value returned by the procedure or function Throws: `ScriptException` - if an error occurs during invocation of the method. `NoSuchMethodException` - if method with given name or matching argument types cannot be found. `NullPointerException` - if method name is null.

### method:getInterface(java.lang.Class) [NONE]
- #### getInterface
      <T> T getInterface(Class<T> clasz)
Returns an implementation of an interface using functions compiled in the interpreter. The methods of the interface may be implemented using the `invokeFunction` method. Type Parameters: `T` - the type of the interface to return Parameters: `clasz` - The `Class` object of the interface to return. Returns: An instance of requested interface - null if the requested interface is unavailable, i. e. if compiled functions in the `ScriptEngine` cannot be found matching the ones in the requested interface. Throws: `IllegalArgumentException` - if the specified `Class` object is null or is not an interface.

### method:getInterface(java.lang.Object, java.lang.Class) [NONE]
- #### getInterface
      <T> T getInterface(Object thiz,
                         Class<T> clasz)
Returns an implementation of an interface using member functions of a scripting object compiled in the interpreter. The methods of the interface may be implemented using the `invokeMethod` method. Type Parameters: `T` - the type of the interface to return Parameters: `thiz` - The scripting object whose member functions are used to implement the methods of the interface. `clasz` - The `Class` object of the interface to return. Returns: An instance of requested interface - null if the requested interface is unavailable, i. e. if compiled methods in the `ScriptEngine` cannot be found matching the ones in the requested interface. Throws: `IllegalArgumentException` - if the specified `Class` object is null or is not an interface, or if the specified Object is null or does not represent a scripting object.