Configuring a One-to-One Mapping

Use a one-to-one mapping to represent simple pointer references between two Java objects. In Java, a single pointer stored in an attribute represents the mapping between the source and target objects. Relational database tables implement these mappings using foreign keys.

You define a one-to-one mapping at one of the property (getter or setter method) or field level of your entity.

For more information, see "Understanding One-to-One Mapping" in the Oracle TopLink Developer's Guide.

@OneToOne(cascade=ALL, fetch=LAZY)
@JoinColumn(name="ADDR_ID")
public Address getAddress()
{
    return address;
}