Adding up results

Question

I’m starting to use the framework uaiCriteria and I need a result that is a sum of records in a period.

Something like (simplified):

select sum(valor), sum(desconto), data, idpessoa from tabela group by data, idpessoa

Fez:

UaiCriteria<Despesa> uc = UaiCriteriaFactory.createQueryCriteria(getEntityManager(), Despesa.class);
uc.sum("valor").sum("desconto").groupBy("data","pessoa");

I hoped he would return to me a collection of objects (Despesa) with the totaled attributes. but it returns me only one object Despesa with the value of only one of the objects.