Package jakarta.persistence
Annotation Interface JoinColumns
Specifies the mapping for composite foreign keys. This annotation
groups
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; }
- Since:
- 1.0
- See Also:
-
Required Element Summary
Modifier and TypeRequired ElementDescriptionThe join columns that map the relationship. -
Optional Element Summary
Modifier and TypeOptional ElementDescription(Optional) Used to specify or control the generation of a foreign key constraint when table generation is in effect.
-
Element Details
-
value
JoinColumn[] valueThe join columns that map the relationship.
-
-
-
foreignKey
ForeignKey foreignKey(Optional) Used to specify or control the generation of a foreign key constraint when table generation is in effect. If both this element and theforeignKey
element of any of theJoinColumn
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.- Since:
- 2.1
- Default:
- @jakarta.persistence.ForeignKey(PROVIDER_DEFAULT)
-