@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 |
|---|---|
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 String generator
SequenceGenerator or TableGenerator
annotation.
Defaults to the id generator supplied by persistence provider.
public abstract GenerationType strategy
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