Java Classes Generation

chrisizquierdo · **Joined:** Thu Oct 02, 2003 6:37 pm **Posts:** 3

Hi,

I would like to generate two classes from hibernate mapping files; an abstract class containing the mapped fields for a given table and a concrete class (inheriting from the abstract class) that can be modified by developers.

This generation scheme allows developers to modify concrete classes without losing the changes the next time the classes are generated; concrete classes are generated in temporary folder and only copied to the src folder if they are not already present.

Given the following table:

Labor
FirstName
LastName

I would like the following classes to be generated:

Class AbstractLabor

david · **Posted:** Thu Oct 02, 2003 9:38 pm

hbm2java can be told top generate the domain objects from hbm to allow exactly what you are describing. The Ant task can be used to automate this for the developers or as a nightly build task.

chrisizquierdo · **Joined:** Thu Oct 02, 2003 6:37 pm **Posts:** 3

Thanks for your reply.

I have not been able to find an example showing how to configure hbm2java to do this.

I've read the documentation and searched this forum and unfortunately nothing comes up.

Can you briefly explain how to configure this tool to achieve what I want?

Thank you very much for your time and help,
Chris

Kat · **Posted:** Fri Oct 03, 2003 3:41 pm

Check here:
http://forum.hibernate.org/viewtopic.php?t=924447

-Kat

chrisizquierdo · **Joined:** Thu Oct 02, 2003 6:37 pm **Posts:** 3

Thanks for your reply.

I don't think I explained myself in my previous post.

I know how to use Ant and the Hbm2JavaTask. My problem is with configuring this task to generate two classes (an abstract and a concrete one) as specified in my first post.

Any suggestions?

Thank you very much

david · **Posted:** Fri Oct 03, 2003 11:37 pm

By default hbm2java will only generate one class but will allow that generated class to have an extends in it so you can separate your domain logic so it does not get deleted when the classes are next generated. If you really want this functionality you can extend hbm2java with an additional renderer designed for your purpose.

max · **Posted:** Sat Oct 04, 2003 11:44 am

chrisizquierdo wrote:

Thanks for your reply.

I have not been able to find an example showing how to configure hbm2java to do this.

I've read the documentation and searched this forum and unfortunately nothing comes up.

Can you briefly explain how to configure this tool to achieve what I want?

Thank you very much for your time and help,
Chris

Read about the meta tag support in hbm2java in the docs.
Look for the "generated-class" attribute - it does exactly what you want ....hbm2java will generate the abstract class - and you make the concrete class....

max · **Posted:** Sat Oct 04, 2003 11:45 am

sorry - you want to have the concerete class generated too....may I ask why ?

I normally only make an abstract class when I really want to have one...with hbm2jvav you could just tag the concrete classes you want to be abstract....