Package javax.persistence
Annotation Type JoinColumns
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@Target({METHOD,FIELD}) @Retention(RUNTIME) public @interface JoinColumns
Defines mapping for composite foreign keys. This annotation groupsJoinColumn
annotations for the same relationship.When the
JoinColumns
annotation is used, both thename
and thereferencedColumnName
elements must be specified in each suchJoinColumn
annotation.Example: @ManyToOne @JoinColumns({ @JoinColumn(name="ADDR_ID", referencedColumnName="ID"), @JoinColumn(name="ADDR_ZIP", referencedColumnName="ZIP") }) public Address getAddress() { return address; }
- Since:
- Java Persistence 1.0
- See Also:
JoinColumn
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Required Element Summary
Required Elements Modifier and Type Required Element Description JoinColumn[]
value
The join columns that map the relationship.
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Optional Element Summary
Optional Elements Modifier and Type Optional Element Description ForeignKey
foreignKey
(Optional) The foreign key constraint specification for the join columns.
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Element Detail
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value
JoinColumn[] value
The join columns that map the relationship.
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foreignKey
ForeignKey foreignKey
(Optional) The foreign key constraint specification for the join columns. This is used only if table generation is in effect. Default is provider defined.- Returns:
- The foreign key specification
- Default:
- @javax.persistence.ForeignKey
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