//service
  public List<TEAM> getTeamsInTournament(int tournamentID){
        List<BigDecimal> teamIDS = dao.getTeamIDSInTournament(tournamentID);
        List<TEAM> teamList = new ArrayList<>();
        for(BigDecimal teamId : teamIDS){
            teamList.add(teamService.getTeamByID(teamId.intValue()));
        }
        return teamList;

    }
//dao
  public List<BigDecimal> getTeamIDSInTournament(int tournamentID) {
        String queryStr = String.format("select TEAMID from TEAM_TOURNAMENT where TOURNAMENTID=%d", tournamentID);
        Query query = entityManager.createNativeQuery(queryStr);
        List<BigDecimal> teamList = query.getResultList();
        return teamList;
    }