Hi

I have a onetoone mapping problem.
What I would like to a achieve is a kind a type 2 mapping.
So the key should compose of startdate, enddate and id.
this is also the key of the associated object.
A object should be updated when startdate is never than startdate or older than enddate and id is the same.
In the onetoone mapping i should fetch from a sql statement.
Is this possible and how should I get started?