Dependent object class and subclass mapping to relational data store

摘要: A method and system for mapping a persistent dependent object between object-oriented schema relational data store schema. Prior to application program run-time, code is generated that defines logical combination of null non-null columns in the tables each class subclass. The maps instance variable subclass one column value which has no corresponding variable. At an may invoke services map object, turn calls database driver such as ODBC or retrieve from store. In response referencing accesses associates elements with variables accordance defined by code. subclasses are determined comparing pattern values read program, having been provided dependent, then (non-null) into object.