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@Target(value={METHOD,FIELD}) @Retention(value=RUNTIME) public @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; }
JoinColumn
,
ForeignKey
Required Element Summary | |
---|---|
JoinColumn[] |
value
The join columns that map the relationship. |
Optional Element Summary | |
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ForeignKey |
foreignKey
(Optional) Used to specify or control the generation of a foreign key constraint when table generation is in effect. |
Element Detail |
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public abstract JoinColumn[] value
public abstract 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.
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EclipseLink 2.5.0, build 'v20130507-3faac2b' API Reference | ||||||||
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SUMMARY: REQUIRED | OPTIONAL | DETAIL: ELEMENT |