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@Target(value={TYPE,METHOD,FIELD})
@Retention(value=RUNTIME)
public @interface PrimaryKeyJoinColumns
Groups PrimaryKeyJoinColumn annotations.
It is used to map composite foreign keys.
Example: ValuedCustomer subclass
@Entity
@Table(name="VCUST")
@DiscriminatorValue("VCUST")
@PrimaryKeyJoinColumns({
@PrimaryKeyJoinColumn(name="CUST_ID",
referencedColumnName="ID"),
@PrimaryKeyJoinColumn(name="CUST_TYPE",
referencedColumnName="TYPE")
})
public class ValuedCustomer extends Customer { ... }
ForeignKey| Required Element Summary | |
|---|---|
PrimaryKeyJoinColumn[] |
value
One or more PrimaryKeyJoinColumn annotations. |
| Optional Element Summary | |
|---|---|
ForeignKey |
foreignKey
(Optional) Used to specify or control the generation of a foreign key constraint when table generation is in effect. |
| Element Detail |
|---|
public abstract PrimaryKeyJoinColumn[] value
PrimaryKeyJoinColumn annotations.
public abstract ForeignKey foreignKey
foreignKey element
of any of the PrimaryKeyJoinColumn elements are specified,
the behavior is undefined. If no foreign key annotation element
is specified in either location, the persistence provider's
default foreign key strategy will apply.
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