#ifndef CLOCKOBSERVER_AH
#define CLOCKOBSERVER_AH

#include "ObserverPattern.ah"

aspect ClockObserver : public ObserverPattern {
  pointcut subjectChange (Subject &subject) =
    execution ("void ClockTimer::Tick()") && that (subject);
  pointcut observers() = "DigitalClock"||"AnalogClock";

public:

  advice "ClockTimer" : slice struct : public ObserverPattern::Subject;
  advice observers () : slice struct : public ObserverPattern::Observer;
  advice observers () : slice struct {
    void update (ObserverPattern::Subject *subject) {
      Draw ((const ClockTimer &)*subject);
    }
  };

  virtual void updateObserver(Subject *subject, Observer *observer) {
    observer->update (subject);
  }
};

#endif // CLOCKOBSERVER_AH