Question

All,

While this is similar to another post, that post (does not indicate how to perform this (if it can be done) without instantiating an object. Also, without success I have tried multiple variations on the theme of:

class[method](arg)
class[method].call(arg)
method.apply(class, arg)

I am new to Flex, but have used Reflection in both C# and Java. BTW, the code that I am attempting to get to work in Flex is mirrored in both those languages and works as expected.

Any help is appreciated,
Thanks,
Todd

Non-functioning Flex Code:

    private function ipMethodTester( ipMethodName:String,
             shouldPass:Array, shouldFail:Array):void
    {
        var message:String;
        var entry:String;
        for each(entry in shouldPass)
        {
            message = ipMethodName + ": " + entry + " should pass";
            try
            {
                Assert.assertTrue(message,
                    FieldValidator[ipMethodName](entry));
            }
            catch(e:Error)
            {
               Assert.fail(e.message + " " + message);
            }
        }
        for each(entry in shouldFail)
        {
            message = ipMethodName + ": " + entry + " should fail";
            try
            {
                Assert.assertFalse(message,
                    FieldValidator[ipMethodName](entry));
            }
            catch(e:Error)
            {
               Assert.fail(e.message + " " + message);
            }
        }
    }

Java Code:

private void ipMethodTester(final String ipMethodName,
         final String[] shouldPass, final String[] shouldFail)
{
   Method method;
   try
   {
      method = InetUtil.class.getDeclaredMethod(ipMethodName, String.class);
      method.setAccessible(true);

      for(String entry : shouldPass)
      {
         Object[] invokeArgs = { entry };
         boolean passed = (Boolean)method.invoke(null, invokeArgs);

         assertTrue(ipMethodName + ": " + entry + " should pass", passed);
      }

      for(String entry : shouldFail)
      {
         Object[] invokeArgs = { entry };
         boolean passed = (Boolean)method.invoke(null, invokeArgs);

         assertFalse(ipMethodName + ": " + entry + " should fail", passed);
      }
  }
  catch (final Exception e)
  {
     fail(e.getClass().toString());
  }
}

C# code:

    private void ipMethodTester(string ipMethodName, string[] shouldPass, string[] shouldFail)
    {
        Type type = typeof (ValidateUtil);
        BindingFlags bindingFlags = BindingFlags.InvokeMethod
            | BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Static;

        MethodInfo method = type.GetMethod(ipMethodName, bindingFlags);

        foreach(string entry in shouldPass)
        {
            object[] invokeArgs = { entry };
            bool passed = (bool)method.Invoke(null, invokeArgs);

            Assert.IsTrue(passed, ipMethodName + ": " + entry + " should pass");
        }

        foreach(string entry in shouldFail)
        {
            object[] invokeArgs = { entry };
            bool passed = (bool)method.Invoke(null, invokeArgs);

            Assert.IsFalse(passed, ipMethodName + ": " + entry + " should fail");
        }
    }

Answer 1

This works for me:

MyClass['myMethod']('arg1','arg2');

This also works:

MyClass['myMethod'].call(MyClass, 'arg1', 'arg2');

Note: the first argument of the ‘call’ method (MyClass in this case) just specifies which object is referenced when you use the ‘this’ keyword inside the function.