Data processing: database and file management or data structures – Database design – Data structure types
Reexamination Certificate
1998-03-25
2001-04-24
Kulik, Paul V. (Department: 2777)
Data processing: database and file management or data structures
Database design
Data structure types
C707S793000
Reexamination Certificate
active
06223184
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, there is a need to access such “legacy” datastores using application programs developed by object-oriented programming systems (OOPS). However, there are few tools available to assist OOPS programmers.
For object-oriented applications to access non-object-oriented datastores, OOPS programmers often need to generate much code to satisfy the constraints of the object-oriented application, the non-object-oriented datastore, and the particular needs of the user. Thus, there is a need in the art for improved tools to facilitate bridging between non-object-oriented datastores and object-oriented application programs and to minimize the need to write to code for accessing the external datastore.
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 cataloging datastore characteristics and defining and generating datastore persistent objects. A computerized system in accordance with the principles of the present invention includes an external non-object-oriented datastore and a class definition tool that defines a specification for the external non-object-oriented datastore, defines a specification for a datastore persistent object class using the specification for the external non-object-oriented datastore, and defines a specification for an application program that interacts with the datastore persistent object class.
The class definition tool stores the datastore specification, the datastore persistent object class specification, and the application program specification in a catalog.
The class definition tool further uses the datastore specification and the datastore persistent object class specification to generate datastore persistent object class and schema mapper class definition and method source code, and uses the application program specification to generate subschema mapper class definition and method source code.
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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