AssociationOverride (Java EE 5)

javax.persistence Annotation Type AssociationOverride

@Target(value={TYPE,METHOD,FIELD})
@Retention(value=RUNTIME)
public @interface AssociationOverride

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 {
        ...
    }
 

Since:

Java Persistence 1.0

See Also:

OneToOne, ManyToOne, MappedSuperclass

name

public abstract 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.

joinColumns

public abstract JoinColumn[] joinColumns

The join column that is being mapped to the persistent attribute. The mapping type will remain the same as is defined in the mapped superclass.

Copyright 2007 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms.