javax.persistence
Annotation Type MapKeyClass

@Target(value={METHOD,FIELD})
@Retention(value=RUNTIME)
public @interface MapKeyClass

The MapKeyClass annotation is used to specify the type of the map key for associations of type java.util.Map. The map key can be a basic type, an embeddable class, or an entity. If the map is specified using Java generics, the MapKeyClass annotation and associated type need not be specified; otherwise they must be specified.

Since:

JPA 2.0 version.

Author:

Florent Benoit

See Also:

JPA 2.0 specification

Required Element Summary

Class

value (Required) The type of the map key.

Element Detail

value

public abstract Class value

(Required) The type of the map key.