Hi,
Is it possible to join two entities without mapping between them by criteria api?

I have something like this:

class Entity1 {
public int ID{get;set;}
public int SomeID {get;set;} //foreign key
}

class Entity2 {
public int ID{get;set;}
}

class Entity3 {
public int ID{get;set;}
}
...
class EntityX {
public int ID{get;set;}
}

Sometimes I want to query joining Entity1.SomeID with Entity2.ID but
in other times I want to join Entity1.SomeID with EntityX.ID.

Any ideas? (No HQL, only Criteria API)