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Implement JPA 2.1 entity graph support

Description

IMHO Chapter 3.7.4.2 of the JPA spec says that @NamedEntityGraph can be used instead of fetch joins. For instance:

1 2 3 4 5 6 7 8 9 10 11 @Entity @Table(name = "kunde") @DiscriminatorColumn(name = "art", length = 1) @NamedQueries({...}) @NamedEntityGraphs({@NamedEntityGraph(name = "bestellungen", attributeNodes = @NamedAttributeNode("bestellungen"))}) public abstract class AbstractKunde implements Serializable, Cloneable {...} // 2 concrete classes are derived from the abstract class @PersistenceContext private EntityManager em; ... List<AbstractKunde> kunden = em.createNamedQuery("...", AbstractKunde.class).setParameter("...", "...").setHint("javax.persistence.loadgraph", "bestellungen").getResultList();

When I try to access the attribute "bestellungen" after committing the transaction, then I get a LazyInitializationException.

Environment

None

Status

Assignee

Steve Ebersole

Reporter

Juergen Zimmermann

Fix versions

Labels

backPortable

None

Suitable for new contributors

None

Requires Release Note

None

Pull Request

None

backportDecision

None

Components

Affects versions

4.3.0.Beta3

Priority

Major