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Message:

Bean Dilemma

Posted by Andrew Semprebon on 16 Sep 1998, 10:06 AM

I've been working on a joystick class and recently came across your "Bean or not to Bean" discussion. My first thought was, "Boy, my joystick class would make a great bean!" A developer could drop it in to a visual development tool and it could generate events when the joystick is moved. The only problem is that my current class not only doesn't have a no-arg constructor, it has no public construct at all! Instead, it uses a factory method to get an array of all the joysticks currently attached to the system, so I don't need to do anything special if there aren't any (you just get a zero-length array. I still like the idea of making it a bean, though, so I'll have to rethink the design.

Anyway, I wanted to make the point that whether there is an appropriate no-arg state is in this case hardware dependent. If there is at least one joystick, it can be set up as controlled by the no-arg object. But if there is no joystick, then no instance of the class has valid state.

• Joystick Bean (JoyBean?) Mark Johnson 22 Sep 1998, 10:27 AM (5)
  • Joystick Bean Andrew Semprebon 22 Sep 1998, 1:28 PM (4)
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      • ttnet.tr iso December 06, 2001 at 11:07 AM (1)
        • 115563 mesuttoprak February 03, 2002 at 12:06 PM (0)