Working with Inheritance

In TopLink, inheritance describes how a child class inherits the characteristics of its parent class. TopLink provides multiple methods to preserve the inheritance relationships. You can override mappings that have been specified in a superclass, or map attributes that have not been mapped at all in the superclass.

Note: When using an aggregate descriptor in an inheritance, all the descriptors in the inheritance tree must be aggregates. Aggregate and Class descriptors cannot exist in the same inheritance tree.