Article: Tell don't ask - watering after refactoring

Watering.java

public class Watering {

    private final RaisedBedRepository raisedBedRepository;
    private final WaterValveRepository waterValveRepository;

    public Watering(RaisedBedRepository raisedBedRepository, WaterValveRepository waterValveRepository) {
        this.raisedBedRepository = raisedBedRepository;
        this.waterValveRepository = waterValveRepository;
    }

    public WateringResult perform(WateringCommand command) {
        // cut out: getting raised bed with plants and wattering bed
        return waterBed(raisedBed.get(), waterValve.get());
    }

    private WateringResult waterBed(RaisedBed raisedBed, WaterValve waterValve) {
        WateringResult successfullyWatered = raisedBed.waterWith(waterValve);
        raisedBedRepository.save(raisedBed);
        waterValveRepository.save(waterValve);
        return successfullyWatered;
    }

}