[OJB-developers] n:m relations to polymorph classes, automatic ddl generation

[Christoph S. <ch...@sc...>]

Hi All!

I am evaluation ojb for a simple content management system that supports 
multiple article types. Each article will be saved in a separate table, 
but i want to search across all of them. I think the <extends> feature 
of ojb enables that.
But I also have a categories table with a n:m relation to article.
now my questions:
Is it possible to have a n:m relationship to a base class?
I assume that ojb joins all involved tables when doing a query on an 
interface or baseclass. Will that still work if I have really lots of 
different article types?

Some other questions relating to my cms efforts:
Is there support planned for automatic updating of the database scheme? 
 (ie create table or alter table)
How hard would it be to use ojb without generating a class for every 
table? I'd just like to use ojb for generating a query, but i want to 
get my data back in a map instead of a bean. Then I could just define an 
article as a ojb mapping, and dont need to generate and compile java 
code if a new articletype is generated.

TIA
 chris