Each entity class should be mapped to its own primary table. Each primary table has a reference key referring to a primary table of its parent class except for the primary table of the root class. The reference key should join on the primary key of the primary table.
- Define class mappings for each class in the hierarchy. Each class is mapped to its own primary table.
- Define identifier mapping in the root class.
- Define attribute mappings or association mappings for each class.
- Define persistence generation type for each class.
- Define persistence generation type of all the classes as Generate table.