Package javax.persistence
Annotation Interface MapKeyEnumerated
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<ProjectStatus, Project> getProjects() {...} @OneToMany @MapKeyEnumerated(STRING) public Map<SalaryRate, Employee> getEmployees() {...} ... }
- Since:
- Java Persistence 2.0
- See Also:
-
Optional Element Summary
-
Element Details
-
value
EnumType value(Optional) The type used in mapping a map key enum type.- Default:
- ORDINAL
-