NET/worlds/scape/StartupSensor.java


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package NET.worlds.scape;

import java.io.IOException;

public class StartupSensor extends Sensor implements FrameHandler {
   private boolean hasTriggered = false;
   private static Object classCookie = new Object();

   @Override
   public void addAction(Action o) {
      this.hasTriggered = false;
      super.addAction(o);
   }

   @Override
   public boolean handle(FrameEvent e) {
      if (!this.hasTriggered) {
         this.hasTriggered = true;
         this.trigger(e);
      }

      return true;
   }

   @Override
   public void saveState(Saver s) throws IOException {
      s.saveVersion(0, classCookie);
      super.saveState(s);
   }

   @Override
   public void restoreState(Restorer r) throws IOException, TooNewException {
      switch (r.restoreVersion(classCookie)) {
         case 0:
            super.restoreState(r);
            return;
         default:
            throw new TooNewException();
      }
   }
}