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@Target(value={TYPE,METHOD,FIELD})
@Retention(value=RUNTIME)
public @interface AssociationOverrideThis annotation is used to override a many-to-one or one-to-one mapping of property or field for an entity relationship.
The AssociationOverride annotation may be applied
to an entity that extends a mapped superclass to override a many-to-one
or one-to-one mapping defined by the mapped superclass. If the
AssociationOverride annotation is not specified, the join
column is mapped the same as in the original mapping.
Example:
@MappedSuperclass
public class Employee {
...
@ManyToOne
protected Address address;
...
}
@Entity
@AssociationOverride(name="address",
joinColumns=@JoinColumn(name="ADDR_ID"))
// address field mapping overridden to ADDR_ID fk
public class PartTimeEmployee extends Employee {
...
}
OneToOne,
ManyToOne,
MappedSuperclass| Required Element Summary | |
|---|---|
JoinColumn[] |
joinColumns
The join column that is being mapped to the persistent attribute. |
String |
name
The name of the relationship property whose mapping is being overridden if property-based access is being used, or the name of the relationship field if field-based access is used. |
| Element Detail |
|---|
public abstract String name
public abstract JoinColumn[] joinColumns
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Copyright 2006 Sun Microsystems, Inc. All rights reserved.