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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 | |
|---|---|
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 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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