i'm using implicit polymorphism with the table-per-subclass inheritance scheme (though i could be argued to try another scheme if it helps). i'm trying to write a query that would do something like:

say, eg.MeanCat extends eg.Cat and adds a property irritability..

from eg.Cat as cat
where (cat.class = eg.MeanCat and cat.irritability > 5)
or (cat.class = eg.DomesticCat)

which would then select all domestic cats and mean cats with irritability greater than 5. of course right now when i try this, the subclass' properties aren't found in the superclass, which is understandable.

in short, is there any way to "cast" in HQL?