Hibernate as DAO code generator

joelbcohen · **Joined:** Thu Dec 11, 2003 12:02 pm **Posts:** 23

Has anyone used hibernate simply as a RAD dao code generator? (pun intended).

I work at a company where the persistence layer is hand written for various reasons. I am wondering if there is a way to make hibernate output a file something like the following pseduo code below (Assume customer.hbm.xml already exists).

Code:

public class customerDAO{

   public insertCustomer(Customer customer){
       connx = getConnx();
       connx.set...
       insert into CSTMR (customerId, customerName) values (...)
   }


   public updateCustomer(Customer customer){
      connx = getConnx();
      connx.set...
      update CSTMR ....
   }


   public deleteCustomer(Customer customer){

   }

It would save me time from looking up the database field names, getting the corresponding property of the value object, etc.

I guess because the .hbm.xml file is available I could create a custom xml parser, parse the file, and spit out the code above based on any preferences I have.

Any thoughts or ideas for other ways to do this?

christian · **Posted:** Fri Feb 20, 2004 11:45 am

The hbm2java tool (Hibernate Extensions) already has some templates for basic finder/DAO generation. More velocity templates would certainly be very welcome, check it out.

joelbcohen · **Joined:** Thu Dec 11, 2003 12:02 pm **Posts:** 23

I couldn't find any reference to a velocity template (*.vm) being used in hibernate extensions (hbm2java) or hibernate2.1.2

It appears to me that hbm2.java builds the java files directly and does not consult an external template.

Can you please tell me what the external template file hbm2java uses to build the java code and where it is located. Also if you have the DAO templates or know where to download them that would be nice too.

Thankx.

michael · **Posted:** Fri Feb 20, 2004 1:46 pm

You can enable the Velocity based renderer by specifying

Code:

<codegen> 
<generate renderer="net.sf.hibernate.tool.hbm2java.VelocityRenderer"> 
<param name="template">pojo.vm</param> 
</generate> 
</codegen>

in the config.xml

max · **Posted:** Fri Feb 20, 2004 9:26 pm

....but PLEEASE be aware that velocity su...eh, is hard to use with respect to proper code generation....but hey - it's a free world ;)

I would recommend extending the current BasicRenderer or utilize the helper code to write a custom Renderer.