JPA - sort by aggregated fields.

Hi,


I have a query in spring-data and I'm using pagination repository.
I'm having issues with sorting (using the Pageable object) when it comes does to sort by aggregated fields...
for example - assuming I have a

Code:

---

public class Job {

    @OneToMany(fetch = FetchType.LAZY)
    @JoinColumn(name = "job_id")
    private Set<SomeObject> someObjects;
}

---

my query is

Code:

---

select j.id, count(j.someObjects) from Job

---

and I'd like to sort based on the count() .

I've tried numerous options - none were successful.. (such as providing alias to the field, sort by "count(j....)")
btw - JPA provider is hibernate 4
any help would be greatly appreciated ;)


Yoni