The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 24, 2001
Filed:
Jun. 11, 1998
Scott Neal Gerard, Rochester, MN (US);
Steven Lester Halter, Rochester, MN (US);
Steven J. Munroe, Rochester, MN (US);
Erik E. Voldal, Rochester, MN (US);
Internationl Business Machines Corporation, Armonk, NY (US);
Abstract
The present invention provides a method and apparatus for versioning persistent objects which updates the version of a persistent object by splitting the persistent object up into two sections, a header section and a data section. The header section has a data pointer to the data section. The header section determines the object identity of the persistent object and always remains in place. Since the header section of the object always remains intact, the object identity of the persistent object never changes. When updating the version of the persistent object, the persistent object versioning mechanism simply updates the pointer in the header section of the object to reference a newly created data section. Once the persistent object versioning mechanism updates the data pointer to reference the new data section, existing objects can reference the new version of the persistent object using the original object identity of the persistent object.