Do I realy need to list @Entity twice?

Question

I'm trying to create a simple Hibernate (version 5.4) application with hibernate.cfg.xml file. I'm using SessionFactory. All the entities are annotated with @Entity. To my surprise, the application doesn't work without <mapping class="..."/> tags as well. No autodetaction works.
So I have to list entities twice - with the @Entity annotation in code and within the mapping tag in XML file. Is that correct?

Is it java ee application? Do you use application server? – SternK May 21 '20 at 16:12 — SternK, May 21 '20 at 16:12
No, it' Java SE application – Ekaterina May 21 '20 at 16:16 — Ekaterina, May 21 '20 at 16:16

score 1 · Accepted Answer · answered May 22 '20 at 20:32

You can initialize the hibernate's SessionFactory in the following way:

MetadataSources metadata = new MetadataSources(
   new StandardServiceRegistryBuilder().configure("hibernate.cfg.xml").build()
);

for (Class<?> clazz: ClassUtil.getClassesForPackage("com.xxx.hibernate.entities"))
{
   if (clazz.isAnnotationPresent(Entity.class)) {
      metadata.addAnnotatedClass(clazz);
   }
}

Metadata meta = metadata.buildMetadata();
SessionFactory sessionFactory = meta.buildSessionFactory();

Where the ClassUtil.getClassesForPackage method uses one of approaches described in this question.

Do I realy need to list @Entity twice?

1 Answers1