Data processing: database and file management or data structures – Database design – Data structure types
Reexamination Certificate
1998-05-07
2001-04-17
Kulik, Paul V. (Department: 2777)
Data processing: database and file management or data structures
Database design
Data structure types
C707S793000
Reexamination Certificate
active
06219673
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates generally to computerized methods for accessing datastores, and in particular, to a computerized object-oriented method for accessing non-object-oriented datastores.
2. Description of Related Art
It is well known in the art to use database management systems, such as IBM's IMS™ (Information Management System) database management system, to manage computerized datastores. Indeed, IMS™ has been used for decades and remains in use today. Currently, application programs developed by object-oriented programming systems (OOPS) require an object-oriented database management system (OODBMS) to store persistent objects. Because of the prevalence of such “legacy” datastores as IMS™, there is a need to store persistent objects in non-object-oriented datastores. There is a need in the art for tools to assist OOPS programmers in storing persistent objects without substantial additional coding, both object-oriented and non-object-oriented.
Thus, there is a need in the art for improved techniques for bridging between non-object-oriented datastores and object-oriented application programs.
SUMMARY OF THE INVENTION
To overcome the limitations in the prior art described above, and to overcome other limitations that will become apparent upon reading and understanding the present specification, the present invention discloses a method, apparatus, and article of manufacture for using a non-object-oriented datastore as a generic persistent datastore for persistent objects. A computerized system in accordance with the principles of the present invention provides a “bridge” that interfaces between an application program and a non-object-oriented database management system to provide persistent storage for objects manipulated by the application program. The invention further provides a class definition tool for defining a generic database description associated with the non-object-oriented datastore, for defining a specification for the non-object-oriented datastore using the generic database description, for defining a specification for a generic datastore persistent object class using the specification of the non-object-oriented datastore, and for generating generic schema mapper class definition and method source code using the generic datastore persistent object class specification, wherein the generic schema mapper class definition and method source code has methods for interfacing the application program and the non-object-oriented datastore.
Various advantages and features of novelty which characterize the invention are pointed out with particularity in the claims annexed hereto and form a part hereof. However, for a better understanding of the invention, its advantages, and the objects obtained by its use, reference should be made to the drawings which form a further part hereof, and to accompanying descriptive matter, in which there is illustrated and described specific examples of an apparatus in accordance with the invention.
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Blackman Kenneth R.
Howe, III Jack L.
Gates & Cooper
International Business Machines - Corporation
Kulik Paul V.
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