JPA : Support Hibernate XML Mappings

[bouil]

Would be nice if Querydsl could support also hibernate xml configuration (hbm.xml)

[Timo Westkämper (timo-westkamper)]

I assume you mean to make the code generation use hibernate XML configuration as the basis for the domain model instead of using APT?

[bouil (bouil)]

Yes, it was exactly what I mean. Thanks for the reformulation :-)

[Timo Westkämper (timo-westkamper)]

HibernateDomainExporter provides now the functionality you requested :

        File configuration = new File("examples.hbm.xml");
        HibernateDomainExporter exporter = new HibernateDomainExporter(
          "Q", // name prefix
          new File("target/gen3"), // target folder
          configuration); // hbm files (varargs)

          exporter.export();

[bouil (bouil)]

Who, I'm impressed how fast you implements this functionality. I can now give to the project a try in a wider context.

I had a quick look on the querydsl-jpa/src/main/java/com/mysema/query/jpa/hibernate/HibernateDomainExporter.java file and just got a bit suprised you parsed the XML file instead of trying to work with org.hibernate.cfg.Configuration directly. But maybe it is easier that way.

Is there a maven plugin that can integrate the HibernateDomainExporter ? If not I could simply use the groovy-maven-plugin to execute the previous code in the correct build phase.

[Timo Westkämper (timo-westkamper)]

I took the XML approach, since I could easily generate dummy hbm xml files for testing. Using the Hibernate Tools to generate hbm xml files from annotated classes didn't work.

> Is there a maven plugin that can integrate the HibernateDomainExporter ?

No. Using the groovy-maven-plugin sounds good.

[Timo Westkämper (timo-westkamper)]

I will see how easily I can refactor the HibernateDomainExporter to use the Hibernate configuration.

[Timo Westkämper (timo-westkamper)]

Refactored to work with Hibernate configuration :

  HibernateDomainExporter provides now the functionality you requested :
  File configuration = new File("examples.hbm.xml");
  HibernateDomainExporter exporter = new HibernateDomainExporter(
    "Q", // name prefix
    new File("target/gen3"), // target folder
    configuration); // instance of org.hibernate.cfg.Configuration

  exporter.export();

This was actually easier. But the implementation still relies on reflection.

[Timo Westkämper (timo-westkamper)]

Released in 2.0.2

[bouil (bouil)]

I believe there is a small error in the documentation of this item. You kept the

 File configuration = new File("examples.hbm.xml");

but in fact, the "configuration" variable should be a org.hibernate.cfg.Configuration object.

Btw, thanks for making a release with that feature.

[Timo Westkämper (timo-westkamper)]

Thanks, I just fixed the docs.