To customize the Database Table Mapping service, you can customize
the requester and service object that interacts with the tables. To customize
the service object, modify the service definition in the service definition
file (see Database Table Mapping external definitions for a list of attributes
in the service definition) or extend JDBCTable and JDBCTableImpl to provide
your own implementation. JDBCTable is the implementation of the service requester
and JDBCTableImpl is the implementation of the service object. Because JDBCTable
merely passes method calls to JDBCTableImpl, JDBCTable must provide the functionality
of the Database Table Mapping service. Any replacement classes must follow
the same pattern.