[hibernate-issues] [Hibernate-JIRA] Created: (EJB-399) Collecitons in Associated Objects should never be null per EJB 3.0 Specification 2.1.7 Entity Relationships

[Jon Kofal (JIRA)]

Collecitons in Associated Objects should never be null per EJB 3.0 Specification 2.1.7 Entity Relationships
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                 Key: EJB-399
                 URL: http://opensource.atlassian.com/projects/hibernate/browse/EJB-399
             Project: Hibernate Entity Manager
          Issue Type: Bug
          Components: EntityManager
    Affects Versions: 3.3.1.GA
         Environment: Windows XP, JRE 1.6.0_07
            Reporter: Jon Kofal


"EJB 3.0 Specification 2.1.7 Entity Relationships" says (last paragraph):

"If there are no associated entities for a multi-valued relationship of an entity fetched from the database,
the persistence provider is responsible for returning an empty collection as the value of the relationship."

This code below throws a NullPointerException, because the Collection returned from "p.getReports()" is null.  I'd expect that p.getReports() wold return an empty Collection per the EJB 3.0 Specification.

public void testProjectReport() throws Exception {
	EntityManager em = null;
	try {
		em = emf.createEntityManager();
		em.getTransaction().begin();
		Projekt p = new Projekt();
		p.setName(PROJEKT[0]);
		em.persist(p);
		p = (Projekt) em.createQuery("from Projekt").getSingleResult();
		for (Iterator<Report> i = p.getReports().iterator(); i.hasNext();) {
			logger.info(i.next().toString());
		}
		em.getTransaction().commit();
	} catch (Exception e) {
		logger.log(Level.SEVERE, e.getMessage(), e);
		throw e;
	} finally {
		if (em != null) {
			em.close();
		}
	}
}


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