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This 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 | |
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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 |
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public abstract String name
public abstract JoinColumn[] joinColumns
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Copyright 2006 Sun Microsystems, Inc. All rights reserved.