Commented on the Jira. I am confused how you are "mind mapping" PreparedStatement parameters and entity construction into the same conversation. We are not instantiating entities based on PreparedStatement parameters....
On Fri, Mar 18, 2016 at 2:32 AM Lovro Pandzic <lovro.pand...@gmail.com> wrote: > Hello, > > I'd like to discuss issue HHH-9440. > > Basic idea behind this issue is that we try to and eliminate the > requirement for no arg constructor on entities or at least weaken that > requirement to specific cases. > Construction from both the user code and the hibernate itself would go > through user specified constructors. > This would enable use cases like enforcing invariants in constructors, > immutable entities and in the long run, maybe even support for value types > coming in Java 10 that, at least for now, we know will be immutable and > won't have a no arg constructor. > > By using parameter names and Java 8 API you can, for instance, map those > parameter names to fields to find out column mappings and other information > required for mapping arguments to parameters. > > A similar approach like this is used by jackson-databind with the > jackson-module-parameter-names (this will soon be integrated into the > jackson-databind itself). Another example, Spring also uses parameter names > to map bean names to parameters in constructors. > > There are border cases like the one Steve mentioned in the issue: > > > How would you see lazy loading working then? > > > > >From my perspective, there are 2 approaches here: > - use a library like Objenesis that enables you to construct classes > without using the constructor > - document that all entities that are to be proxied must have a no arg > constructor > > What do you guys think? > _______________________________________________ > hibernate-dev mailing list > hibernate-dev@lists.jboss.org > https://lists.jboss.org/mailman/listinfo/hibernate-dev > _______________________________________________ hibernate-dev mailing list hibernate-dev@lists.jboss.org https://lists.jboss.org/mailman/listinfo/hibernate-dev
