public void updateTrack(final User user, final long id, final String title, final String points)
throws TrackNotFoundException, AccessDeniedException {
final TrackImpl track = fetchTrackForUpdate(user, id);
track.setTitle(title);
track.setPoints(points);
entityManager.merge(track);
}
private TrackImpl fetchTrackForUpdate(final User user, final long id)
throws TrackNotFoundException, AccessDeniedException {
final TrackImpl track = fetchTrack(id);
if (!track.getUser().equals(user)) throw new AccessDeniedException();
return track;
}