StringBuilder jpql = new StringBuilder();

    jpql.append(" select folha from Folha folha");
    jpql.append(" where folha.data = :dataAtual and folha.usuario = " + idUser + " ");

    TypedQuery<Folha> query = entityManager.createQuery(jpql.toString(), Folha.class);

    query.setParameter("dataAtual", dataAtual);

    return Optional.ofNullable(DAOUtil.getSingleResult(query));