Dear All!

I'm new to Hibernate tools, so please be patient.
I am trying to generate POJO classes and mapping files (*.hbm.xml) from JDBC connection (from my DB scheme), but I'm not able to generate uni-directional association between two object.
In my DB, I have two tables, with two ID column, which are primary keys. No foreign key is specified in my DB. I set the foreign key link explicitly in hibernate.reveng.xml, that is:


When I generate my POJO classes, I got a reference in both classes (as it's bi-rectional), but I would like to have it uni-directional. I don't have mapping files (I generate them too) where i could set the mapping to be uni-directional.
Also, am I missing something, but a single foreign-key should result in uni-directional association, shouldn't it?

Thanks for all the help in advance,
gmate

I'm not a Hibernate buff myself, but seeing that nobody else has answered yet, I'll take the opportunity to show the limits of my understanding:

Actually, in databases, all links are bidirectional. The link is established by having the same ID field in both "airplane" an "airplane-online", and you can navigate in both directions.

What you want is a unidirectional link on the Java side.
In your case, the backlink doesn't hurt much actually - it's loaded lazily, so until and unless you access it, it won't hit the database. Just ignore it.
You do incur the overhead of having an unused field. Unless the Java object is really, really small (just one or two fields), you won't notice the memory footprint.
There may also be some overhead in the lazy loader because it has to deal with one more field. I don't know how relevant that is.

Of course, displaying the backlink might cause your debugger to access it, which would in turn load the object. But that should not be a problem for one-to-one relationships. (In a many-to-one relationship where a One row is related to a gazillion of Many rows, accidentally loading the backlink will cause loading of that gazillion of rows. That's annoying, so I do think that having unidirectional link would be useful in some cases beyond the one you presented here.)