javax.persistence.MapKeyEnumerated - JPA annotation
Specifies the enum type for a map key whose basic type is an enumerated type. The
MapKeyEnumerated
annotation can be applied to an element collection or relationship of type
java.util.Map
, in conjunction with the
ElementCollection
,
OneToMany
, or
ManyToMany
annotation. If the enumerated type is not specified or the
MapKeyEnumerated
annotation is not used, the enumerated type is assumed to be
ORDINAL
.
Example:
public enum ProjectStatus {COMPLETE, DELAYED, CANCELLED, IN_PROGRESS}
public enum SalaryRate {JUNIOR, SENIOR, MANAGER, EXECUTIVE}
@Entity public class Employee {
@ManyToMany
public Projects
getProjects() {...}
@OneToMany
@MapKeyEnumerated(STRING)
public Map
getEmployees() {...} ... }
- Since:
- JPA 2.0
- See Also:
-
ElementCollection
-
OneToMany
-
ManyToMany
(Optional) The type used in mapping a map key enum type.
(Optional) The type used in mapping a map key enum type.
- Default value:
- javax.persistence.EnumType.ORDINAL
- Since:
- JPA 2.0