private Collection<GroupData> fetchGroupDataForUser(
     final User user, final boolean restrictToSuscribed) {
   final String ifConnectedColumns =
       "max(ifnull(USER_ID=:userId, false))>0, sum(ifnull(USER_ID=:userId AND LAST_VISIT<PUBLIC_MESSAGES.`DATE`, false))";
   final Query query =
       entityManager.createNativeQuery(
           "select GROUPS.ID, name, count(DISTINCT GROUP_USER.USER_ID), "
               + (user != null ? ifConnectedColumns : " 0,0")
               + " from GROUPS left join  GROUP_USER on GROUP_ID=ID "
               + " left join PUBLIC_MESSAGES on PUBLIC_MESSAGES.GROUP_ID=GROUP_USER.GROUP_ID "
               + (restrictToSuscribed ? " where GROUP_USER.USER_ID=:userId" : "")
               + " group by GROUPS.ID order by CREATION_DATE");
   if (user != null) query.setParameter("userId", user.getId());
   final List<Object[]> list = query.getResultList();
   final Collection<GroupData> result = new ArrayList<GroupData>(list.size());
   for (final Object[] o : list)
     result.add(
         new GroupData(
             ((Number) o[0]).longValue(),
             UserStringImpl.valueOf(String.valueOf(o[1])),
             ((Number) o[2]).longValue(),
             ((Number) o[3]).intValue() != 0,
             ((Number) o[4]).intValue()));
   return result;
 }
 public void forgotPassword(final String email) throws UserNotFoundException, MailException {
   final Query query =
       entityManager.createQuery("select u from UserImpl u where u.email=:cryptedMail");
   query.setParameter("cryptedMail", CipherHelper.cipher(email));
   final List<UserImpl> list = query.getResultList();
   if (list.isEmpty()) throw new UserNotFoundException();
   for (final UserImpl user : list) {
     final String password = Helper.randomstring();
     user.setPassword(password);
     MailSender.forgotPasswordMail(user.getName(), password, email);
     entityManager.merge(user);
   }
 }