NHibernate + Criterias + DetachedCriteria

I got this a problem, I need translate t开发者_开发百科his SQL Query to Criteria, but I´m getting some troubles, any one can give a hand?

SELECT * FROM Ref INNER JOIN Product Prod on Ref.id = Prod.id_referencia AND Prod.ProdDtAlteracao = (SELECT MAX(Prod2.ProdDtAlteracao) FROM Product Prod2 WHERE Prod.ProdCod = Prod2.ProdCod)

Assuming Ref has a bag/list property called "products" which maps to Product...

session.CreateCriteria<Ref>("r")
    .CreateAlias("products", "p", InnerJoin)
    .Add(Subqueries.PropertyEq("p.ProdDtAlteracao", DetachedCriteria.For<Product>("p2")
        .SetProjection(Projections.Max("p2.ProdDtAlteracao"))
        .Add(Restrictions.EqProperty("p.ProdCod", "p2.ProdCod"))))
    .List<Ref>();

query would look like

SELECT ...
    FROM Ref 
    INNER JOIN Product Prod on Ref.id = Prod.id_referencia 
    WHERE Prod.ProdDtAlteracao = (
            SELECT MAX(Prod2.ProdDtAlteracao) 
            FROM Product Prod2 
            WHERE Prod.ProdCod = Prod2.ProdCod
        )