third

thirdDesign.java

public class EntityServiceImpl implements EntityService {

    private EntityRepository repository;
    private ImageService imageService;
    private EntityObservers entityObservers;

    @Override
    public void update(String id, UpdateData updateData) {
        Entity entity = repository.find(id);

        UpdateData updateDataWithImage = updateData.addImage(imageService.getImage(updateData.getImageUrl()));
        Entity updatedEntity = entity.update(updateDataWithImage);

        repository.save(updatedEntity);
        entityObservers.notifyUpdated(entity, updatedEntity);
    }

}