@Target(value={METHOD,FIELD})
@Retention(value=RUNTIME)
public @interface GeneratedValue
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;
Id,
TableGenerator,
SequenceGenerator| Modifier and Type | Optional Element and Description |
|---|---|
java.lang.String |
generator
(Optional) The name of the primary key generator
to use as specified in the
SequenceGenerator
or TableGenerator annotation. |
GenerationType |
strategy
(Optional) The primary key generation strategy
that the persistence provider must use to
generate the annotated entity primary key.
|
public abstract GenerationType strategy
public abstract java.lang.String generator
SequenceGenerator
or TableGenerator annotation.
Defaults to the id generator supplied by persistence provider.