Top Description Methods
javax.persistence

public @Interface GeneratedValue

extends Annotation
Annotations
@Target:METHOD, FIELD
@Retention:RUNTIME
Imports
java.lang.annotation.Target, .Retention
Provides for the specification of generation strategies for the values of primary keys.

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
Java Persistence 1.0
See Also
Id, TableGenerator, SequenceGenerator

Method Summary

Modifier and TypeMethod and Description
public String
generator()

(Optional) The name of the primary key generator to use as specified in the SequenceGenerator or TableGenerator annotation.

public GenerationType
strategy()

(Optional) The primary key generation strategy that the persistence provider must use to generate the annotated entity primary key.

Inherited from java.lang.annotation.Annotation:
annotationTypeequalshashCodetoString

Method Detail

generatorback to summary
public String generator()

(Optional) The name of the primary key generator to use as specified in the SequenceGenerator or TableGenerator annotation.

Defaults to the id generator supplied by persistence provider.

strategyback to summary
public GenerationType strategy()

(Optional) The primary key generation strategy that the persistence provider must use to generate the annotated entity primary key.