In class CriteriaSpecification I see only LEFT_JOIN definition, where is RIGHT_JOIN?

I need to build such subquery (in Oracle 9 notation):
... and some_column in (
SELECT Child.ID
FROM Child, Parent
WHERE Child.ParentID (+)= Parent.ID
)
Parent class does not know nothing about joined childs, but Child class does.
So, when I write
final DetachedCriteria subCrit = DetachedCriteria.forClass(Child.class);
subCrit.createAlias("parent", "parent", CriteriaSpecification.LEFT_JOIN);
will produce
... WHERE Child.ParentID = Parent.ID(+)

I can't to write
final DetachedCriteria subCrit = DetachedCriteria.forClass(Parent.class);
subCrit.createAlias("child", "child", CriteriaSpecification.LEFT_JOIN);

because parent doesn't have property for "child".

Really I need to more complex subquery like:
SELECT Child.ID
FROM Child, Parent
WHERE Child.ParentID (+)= Parent.ID
and Child.ID is not null
CONNECT BY PRIOR Parent.ID = Parent.ParentID
START WITH Parent.ID = ?

because parents is tree and not each node of tree have joined child.
------

Eugene.