Hibernate 4.x - Accessing Hibernate Configuration from JPA

djmbrasil · **Posted:** Wed Feb 29, 2012 6:52 pm

At Hibernate 4.1 developer guide section 3.9 (Accessing Hibernate APIs from JPA) is explaind how to get Session and SessionImplementor using JPA API. I'm having a lot of problems trying to use Hibernate Tools and Ant Schema Export Task, since I use JPA persistence.xml configuration file.

I'm trying to generate schema programatically, so I need access to Hibernate Configuration object. I could be done using Ejb3Configuration, but it's deprecated. How to get Hibernate Configuration using JPA?

pb00067 · **Joined:** Tue Jun 16, 2009 3:36 am **Posts:** 990

Hi Daniel,

unfortunately there's no official Hibernate4-conform Hibernate-Tools available so far,
thus there is also no Ant Schema Export Task working for the moment.

You can generate the schema by launching your application with a persistence.xml
specifying property:

Code:

djmbrasil · **Posted:** Thu Mar 08, 2012 6:44 pm

Thank's.

I've tried to use Ant Tasks and Maven Plugin but i've no success. So I'm using EJB3Configuration deprecated class.

Code:

public class SchemaExportUtils {
   public static void export(String persistenceUnit, String exportFileName) {
      Ejb3Configuration cfg = new Ejb3Configuration();
      Ejb3Configuration configured = cfg.configure(persistenceUnit,
            new HashMap<String, Object>());
      Configuration hbmcfg = cfg.getHibernateConfiguration();
      SchemaExport schemaExport = new SchemaExport(hbmcfg);
      schemaExport.setOutputFile(exportFileName);
      schemaExport.setFormat(false);
      schemaExport.setDelimiter(";");
      schemaExport.drop(true, true);
      schemaExport.create(true, true);
   }
}