Hibernate - setProjection after criteria after criteria

Question

why is this impossible?

Criteria crit1 =  sess.createCriteria(Criteria1Class.class);
Criteria crit2 = crit1.createCriteria("criteria2Class");

crit2.setProjection(Projections.groupProperty("criteria2Property"));
List<String> l2 = crit2.list();

If I use this construct, I get an error:

could not resolve property: criteria2Property of: com.foo.bar.models.Criteria1Class

offcourse2Property criteria does not exist Criteria1Classbecause it exists inCriteria2Class

So why is this groupPropertynot possible in associations @manyToOnefrom Criteria1Classto Criteria2Class?

Answer 1

I decided myself:

Criteria crit1 =  sess.createCriteria(Criteria1Class.class)
                  .createAlias("criteria2Class","criteria2ClassAlias")
                  .setProjection(Projections.groupProperty("criteria2ClassAlias.criteria2Property"));

crit1.list();