Package jakarta.persistence
Annotation Type GeneratedValue
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@Target({METHOD,FIELD}) @Retention(RUNTIME) public @interface GeneratedValue
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 theId
annotation. The use of theGeneratedValue
annotation is only required to be supported for simple primary keys. Use of theGeneratedValue
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:
- 1.0
- See Also:
Id
,TableGenerator
,SequenceGenerator
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Optional Element Summary
Optional Elements Modifier and Type Optional Element Description String
generator
(Optional) The name of the primary key generator to use as specified in theSequenceGenerator
orTableGenerator
annotation.GenerationType
strategy
(Optional) The primary key generation strategy that the persistence provider must use to generate the annotated entity primary key.
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Element Detail
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strategy
GenerationType strategy
(Optional) The primary key generation strategy that the persistence provider must use to generate the annotated entity primary key.- Default:
- jakarta.persistence.GenerationType.AUTO
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generator
String generator
(Optional) The name of the primary key generator to use as specified in theSequenceGenerator
orTableGenerator
annotation.Defaults to the id generator supplied by persistence provider.
- Default:
- ""
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