NHibernate: projecting a subclass type of an entity

Question

How do I query a class of a specific entity in NHibernate?
I basically want a projection that returns a System.Type of each row that matches criteria.

I have looked at http://stackoverflow.com/questions/2787498/get-subclass-type-from-projection-with-nhibernate however when I create Projections.Property("alias.class") or Projections.Property("class"), I always get could not resolve property 'class'.

Answer 1

I don't think this is possible using NHibernate directly; but consider adding the following to your base entity class (assuming you have one):

protected virtual Type GetTypeUnproxied() {
    return GetType();
} 

After you have queried your entities, you can interrogate this property to return the actual CLR type of the entity.

Answer 2

If you can't get access to the type through NHibernate for projection purposes, perhaps you can store the System.Type in a field using a custom user type. This should give you the exact functionality you require.

Answer 3

Projections.Property("class") is possible and it works, but only if the class has a discriminator.

_{I got an answer from person on my team (Denis Bykov).
Unfortunately I had hard time making him answer here so I can award him reputation.}