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@Target(value={METHOD,FIELD})
@Retention(value=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
the Id annotation.
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;
| Optional Element Summary | |
|---|---|
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 String generator
SequenceGenerator
or TableGenerator annotation.
Defaults to the id generator supplied by persistence provider.
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Copyright 2006 Sun Microsystems, Inc. All rights reserved.