@Target({METHOD,FIELD})
@Retention(RUNTIME)
public @interface JoinColumns
JoinColumn
annotations for the same relationship.
When the JoinColumns
annotation is used,
both the name
and the referencedColumnName
elements
must be specified in each such JoinColumn
annotation.
Example: @ManyToOne @JoinColumns({ @JoinColumn(name="ADDR_ID", referencedColumnName="ID"), @JoinColumn(name="ADDR_ZIP", referencedColumnName="ZIP") }) public Address getAddress() { return address; }
JoinColumn
,
ForeignKey
Modifier and Type | Required Element | Description |
---|---|---|
JoinColumn[] |
value |
The join columns that map the relationship.
|
Modifier and Type | Optional Element | Description |
---|---|---|
ForeignKey |
foreignKey |
(Optional) Used to specify or control the generation of a
foreign key constraint when table generation is in effect.
|
JoinColumn[] value
ForeignKey foreignKey
foreignKey
element
of any of the JoinColumn
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.Copyright © 2018. All rights reserved.