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need to return the grouping results and also the number of each item of a query with criteria jpa.
public List<Dica> obterDicaPorUsuario(){
final CriteriaBuilder cb = getEntityManager().getCriteriaBuilder();
final CriteriaQuery<Dica> cQuery = cb.createQuery(Dica.class);
final Root<Dica> root = cQuery.from(Dica.class);
List<Predicate> condicoes = new ArrayList<Predicate>();
Expression<Usuario> EpDescricao = root.get("usuario");
cQuery.groupBy(root.get("usuario"));
cQuery.orderBy(cb.desc(cb.count(root.get("usuario"))));
cQuery.select(root).where(condicoes.toArray(new Predicate[]{}));
List<Dica> list = getEntityManager().createQuery(cQuery).getResultList();
for (Dica dica : list) {
System.out.println(" - - " +dica.getUsuario().getNome() );
}
return list;
}
This grouping perfectly, but I also need to return how much of each grouping was made. If anyone knows a better way to do that, I’d appreciate it.