javax.persistence.GeneratedValue - JPA annotation
javax.persistence
Annotation GeneratedValue
- Target:
- Fields (including property get methods)
The GeneratedValue
annotation may be applied to a primary key property or field of an entity or mapped superclass in conjunction with the Id
annotation. The use of the GeneratedValue
annotation is only required to be supported for simple primary keys. Use of the GeneratedValue
annotation is not supported for derived primary keys.
Example 1:
@Id @GeneratedValue(strategy=SEQUENCE, generator="CUST_SEQ") @Column(name="CUST_ID") public Long getId() { return id; }
Example 2:
@Id @GeneratedValue(strategy=TABLE, generator="CUST_GEN") @Column(name="CUST_ID") Long id;
- Since:
- JPA 1.0
- See Also:
-
Id
-
TableGenerator
-
SequenceGenerator
SequenceGenerator
or TableGenerator
annotation. Defaults to the id generator supplied by persistence provider.
- Default value:
- ""
- Since:
- JPA 1.0
- Default value:
- javax.persistence.GenerationType.AUTO
- Since:
- JPA 1.0