[notmattlythgoe]

What Signet said.

Also, if you ware using the Command Based structure with Java you can set the limit switch up to act as a button to fire a command.

final DigitalInput limitSwitch = new DigitalInput(1);
Button limitSwitchButton = new Button() {
     public boolean get() {
           return limitSwitch.get();
     }
};
limitSwitchButton.whenPressed(new SomethingCommand());