@Override
 public int decide(ParkingSlot parkingSlot, ParkingSlot peek) {
   boolean decision = heuristic.decide(parkingSlot, peek);
   if (decision) {
     LOG.debug(
         "Car {} chooses {} with distance {}", id, parkingSlot.getId(), parkingSlot.getDistance());
     putData = true;
     this.parkingSlot = parkingSlot.getId();
     parkingSlotProvider.getObject(this.parkingSlot).occupy(this);
     parkingTime = getOccupationTime();
     return parkingTime;
   }
   return -1;
 }
 @Override
 public void update(Observable o, Object arg) {
   parkingTime--;
   if (parkingTime == 0 && parkingSlot != null) {
     LOG.debug("Car {} leaves {}", id, parkingSlot);
     parkingSlotProvider.getObject(parkingSlot).clear();
     parkingSlot = null;
     o.deleteObserver(this);
     putData = false;
     parkingTime = -1;
     heuristic = heuristic.copy();
     setChanged();
     notifyObservers(CarState.Free);
   }
   if ((o instanceof Street) && (arg instanceof Long)) {
     if (putData) {
       Integer distance =
           parkingSlot == null ? -1 : parkingSlotProvider.getObject(parkingSlot).getDistance();
       // Write the data set to the database. -1 since the decision is made in the previous click
       simulationDataCollector.putCarData(id, distance, (Long) arg - 1);
       putData = false;
     }
   }
 }