Examples of javax.script.Invocable.invokeFunction()

javax.script.Invocable.invokeFunction()
Calls the named method. @param name the name of the function @param args the arguments

                    invocable = (Invocable)scriptEngine;
                } catch (ClassCastException exception) {
                    throw new SerializationException(exception);
                }


                result = invocable.invokeFunction(methodName, args);
            }


            // If the function didn't return a value, return the default
            if (result == null) {
                Class<?> returnType = method.getReturnType();

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    ScriptEngine engine = manager.getEngineByExtension("rb");
    assertNotNull("Engine should not be null",engine);
    engine.eval("def hello(s)\n   return \"Hello \" + s\nend" );
    assertTrue(engine instanceof Invocable);
    Invocable invocableScript = (Invocable) engine;
    assertEquals("Hello petra", invocableScript.invokeFunction("hello", new Object[]{"petra"}));
  }


//  public void testInvokeMethod() throws ScriptException {
//    ScriptEngineManager manager = new ScriptEngineManager();
//    ScriptEngine engine = manager.getEngineByExtension("js");

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        }
      }
      if (scriptEngine instanceof Invocable) {
        final Invocable invocableEngine = (Invocable) scriptEngine;
        Object[] EMPTY = new Object[0];
        result = (String) invocableEngine.invokeFunction(func.getName(), EMPTY);
      }
    } catch (ScriptException e) {
      throw new OCommandScriptException("Error on execution of the script", func.getName(), e.getColumnNumber(), e);
    } catch (NoSuchMethodException e) {
      throw new OCommandScriptException("Error on execution of the script", func.getName(), 0, e);

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  private void invokeFunctionOrMethod(Shell shellState, ScriptEngine engine, CommandLine cl, Object[] args) {
    try {
      Invocable inv = (Invocable) engine;
      if (cl.hasOption(function.getOpt())) {
        inv.invokeFunction(cl.getOptionValue(function.getOpt()), args);
      } else if (cl.hasOption(object.getOpt())) {
        String objectMethod = cl.getOptionValue(object.getOpt());
        String[] parts = objectMethod.split(":");
        if (!(parts.length == 2)) {
          shellState.printException(new Exception("Object and Method must be supplied"));

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    ScriptEngineManager manager = new ScriptEngineManager();
    ScriptEngine engine = manager.getEngineByExtension("js");
    engine.eval("function hello(s) { return 'Hello ' + s; }" );
    assertTrue(engine instanceof Invocable);
    Invocable invocableScript = (Invocable) engine;
    assertEquals("Hello petra", invocableScript.invokeFunction("hello", new Object[]{"petra"}));
  }


  public void testInvokeMethod() throws ScriptException, NoSuchMethodException {
    ScriptEngineManager manager = new ScriptEngineManager();
    ScriptEngine engine = manager.getEngineByExtension("js");

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        product.setName("Rubber");
        product.setPrice(1.99);
        product.setStock(1337);


        ScriptObjectMirror result = (ScriptObjectMirror)
                invocable.invokeFunction("calculate", product);
        System.out.println(result.get("name") + ": " + result.get("valueOfGoods"));
    }


    public static void getProduct(ScriptObjectMirror result) {
        System.out.println(result.get("name") + ": " + result.get("valueOfGoods"));

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      ScriptEngineManager manager = new ScriptEngineManager(
          ScriptingContainer.class.getClassLoader());
      ScriptEngine engine = manager.getEngineByName("jruby");
      try {
        Invocable inv = (Invocable)engine;
        inv.invokeFunction("thisMethodDoesNotExist", new Object());
      } catch (ScriptException se) {
        Throwable t = se;
        while (t != null && t.getCause() != t) {
          System.err.println("Hierarchy of causes " + t.getMessage() + " " + t.getClass().getSimpleName());
          t = t.getCause();

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    // 2
    engine.eval("function add (a, b) {c = a + b; return c; }");
    Invocable jsInvoke = (Invocable) engine;


    Object result1 = jsInvoke.invokeFunction("add", new Object[] { 10, 5 });
    System.out.println(result1);


    // 3
    Adder adder = jsInvoke.getInterface(Adder.class);
    int result2 = adder.add(10, 35);

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        ScriptEngineManager manager = new ScriptEngineManager();
        ScriptEngine pythonEngine = manager.getEngineByName("python");
        Invocable invocableEngine = (Invocable) pythonEngine;


        assertNull(pythonEngine.eval("def f(x): return abs(x)"));
        assertEquals(Integer.valueOf(5), invocableEngine.invokeFunction("f", Integer.valueOf(-5)));
        assertEquals("spam", invocableEngine.invokeMethod(new PyString("  spam  "), "strip"));
        assertEquals("spam", invocableEngine.invokeMethod("  spam  ", "strip"));
    }


    public void testInvokeFunctionNoSuchMethod() throws ScriptException {

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    public void testInvokeFunctionNoSuchMethod() throws ScriptException {
        ScriptEngineManager manager = new ScriptEngineManager();
        Invocable invocableEngine = (Invocable) manager.getEngineByName("python");


        try {
            invocableEngine.invokeFunction("undefined");
        } catch (NoSuchMethodException e) {
            return;
        }
        assertTrue("Expected a NoSuchMethodException", false);
    }

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