Package org.hibernate.annotations

Annotation Interface ConcreteProxy

@Target(TYPE)
@Retention(RUNTIME)
@Incubating
public @interface ConcreteProxy

Annotating ConcreteProxy on the root entity class of an inheritance hierarchy will allow types of that hierarchy to always produce proxies that resolve to the concrete subtype class. This means both lazy associations and plain references can safely be used with instanceof checks and type-casts.

Note that the table(s) of an entity might need to be accessed to determine the concrete proxy type:

• With single table inheritance, the discriminator column value will be left joined when fetching associations or simply read from the entity table when getting references.
• When using joined inheritance, all subtype tables will need to be left joined to determine the concrete type. Note however that when using an explicit discriminator column, the behavior is the same as for single-table inheritance.
• Finally, for table-per-class inheritance, all subtype tables will need to be (union) queried to determine the concrete type.

Since:

6.6