How can QueryOver be used to filter for a specific class?

Question

I am currently dynamically constructing queries like so:

QueryOver q = QueryOver.Of();

if (foo != null) q = q.Where(b => b.         


        

Answer 1

This is not intuitive, but the following should work fine (QueryOver):

if (bar) q = q.Where(b => b.GetType() == typeof(Derived));

I'm not sure about a way to do this in LINQ-to-NH.