unmapped class Exception with Tools alpha

mkopp · **Joined:** Mon Nov 08, 2004 11:58 am **Posts:** 29

I just switched to hibernate 3 and thus tried to use Hibernate-tools 3 alpha hbm2java to generate my classes.

It always complains that associations reference unmapped classes, it never did that before. The unmapped class is also to be generated and was not yet generated. So I think that this is an order problem.

The 2.1 Extentions never had problems with that, do I have to take care of the order now?

I am using the hbm2java from ant!

max · **Posted:** Wed Feb 16, 2005 4:57 am

the "old" hbm2java is not supported at the moment for H3 - it will be back again soon in the toolset.

until then use the artifact generator from eclipse (just dont tell it to reverse engineer and it should work as a good old hbm2java)

mkopp · **Joined:** Mon Nov 08, 2004 11:58 am **Posts:** 29

Well, thanks I already found that one out. I don't use eclipse but I found that hbm2java 2.1 still works with the exception of UserTypes. But typedefs and meta tags work around that.

Any Idea when the new hbm2java will be available? At the same time as H3 final or later?

mike

max · **Posted:** Wed Feb 16, 2005 5:27 am

it will definitly be there when we go final.

please remember that hbm2java in h2.1 does not understand typedefs.

mkopp · **Joined:** Mon Nov 08, 2004 11:58 am **Posts:** 29

yes, but it ignores them. and when the typedef name equals the real classname everything works fine ;-)

max · **Posted:** Wed Feb 16, 2005 5:35 am

you hack! ,)

jimhazen2000 · **Joined:** Mon Jun 21, 2004 7:59 pm **Posts:** 21

I'm using the Hibernate 3 tools eclipse plugin and I get the same error while trying to generate artifacts. If I tell it not to reverse engineer from JDBC connection the error goes away but nothing is generated.

Am I missing something? What would help track this issue down?

I'm running the latest Hibernate tools 3.0 alpha 1, and Eclipse 3.1M5.

Thanks,
Jim

max · **Posted:** Tue Mar 01, 2005 11:14 pm

what error ?

jimhazen2000 · **Joined:** Mon Jun 21, 2004 7:59 pm **Posts:** 21

org.hibernate.MappingException:Association references unmapped class ...

Eclipse should be generating all the mappings and all the classes internally based on the JDBC meta data right?

-Jim

jimhazen2000 · **Joined:** Mon Jun 21, 2004 7:59 pm **Posts:** 21

SchemaExport runs without error but doesn't produce anything.

max · **Posted:** Thu Mar 03, 2005 9:15 am

yes it should work.

provide the schema you are trying to rev.eng for a start ....

jimhazen2000 · **Joined:** Mon Jun 21, 2004 7:59 pm **Posts:** 21

I'm unable to provide the schema. I don't exactly know what is failing, there are a number of tables, some very wide; the DDL for all of them would be huge (not forum friendly). Lastly the data structures are proprietary and my company wouldn't feel comfortable dumping them in a public forum.

I realize this doesn't really help you help me. Is there a log file I could look to that may narrow down the cause of the problem without exposing so much of my data layer?

-Jim

max · **Posted:** Sat Mar 05, 2005 12:22 am

hmm...you could mail it to my mail if that would be ok. dont promise i can fix the bug, but would love to find out about this error.

-max

jimhazen2000 · **Joined:** Mon Jun 21, 2004 7:59 pm **Posts:** 21

I'll see what I can do next week. My DBAs are overworked on another project and if I could get Hibernate to generate the schema I would have already. :) I'm going to give the middlegen plugin a shot. Crossing fingers.

tnine · **Joined:** Fri Feb 13, 2004 10:02 pm **Posts:** 90

I all, I'm am running into the same problem on DB2. I wanted let you know that the issue appears to be on the Database side. With my current userId I do not get all of the tables back from the ddl in the JDBC driver. I was using DB2's generate ddl to post my schema's ddl, and in doing so I noticed that the tables are not returned correctly. I will update this topic when I have found a solution.