kaansonmezoz

public List<Trip> getTripsByUser(User user) throws UserNotLoggedInException {
    User loggedUser = UserSession.getInstance().getLoggedUser();

    if(loggedUser == null){
        throw new UserNotLoggedInException();
    }
    
    List<Trip> tripList = new ArrayList<Trip>();
    boolean isFriend = isFriendOf(user, loggedUser);
  

kaansonmezoz

public List<Trip> getTripsByUser(User user) throws UserNotLoggedInException {
    User loggedUser = UserSession.getInstance().getLoggedUser();

    if(loggedUser == null){
        throw new UserNotLoggedInException();
    }

    return isFriend(user.getFriends(), loggedUser) ?
          TripDAO.findTripsByUser(user) : new ArrayList<Trip>();
}