Hello / Bonjour I recently updated my version of Drools from 3 to the 5.4 Final. My drools integration in version 3 intend to directly insert (or more precisely "assert") our business objects to working session. Our *b*usiness *o*bjects had and still have some getters which directly performs SQL request. Our current problem is that with a 5.4 declarative model we have to map all fields from our bo model to the declarative model. But we have a lot of BO (over 3K) which all have to be inserted to the session, so a lot of SQL queries are performed which increases (a lot) the execution time. That's why i wondered if there isn't any way to directy insert our BO into the session using the Guvnor's POJO model. It's seems that guvnor refuse to directly take our jar, but maybe there is an option which makes it accept any jar. Anyway i think that we can generate a jar which contains interfaces of all BO, and then directly insert BO into the session, but i'm not sure of Drools behaviour. I'm perfectly aware that it's quite ugly, and if you have any other idea to perform a "lazy loading direclty from database", i'l take it. Regards / Cordialement -- View this message in context: http://drools.46999.n3.nabble.com/Mapping-fields-of-all-theses-facts-take... Sent from the Drools: User forum mailing list archive at Nabble.com.