Rule-based engine for transformation of class hierarchy of an object-oriented program
Patent 5983020 Issued on November 9, 1999. Estimated Expiration Date: 
October 2, 2017. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
October 2, 2017. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesInterprocedural slicing of computer programs using dependence graphs Object-oriental system for managing shared libraries Object-oriented framework for creating and using container objects with built-in properties Method of rule execution in an expert system using equivalence classes to group database objects C++ ojbect model alternatives Robust method of forming a cylinder capacitor for DRAM circuits Patent #: 5854119 InventorsApplicationNo. 942519 filed on 10/02/1997US Classes:717/141, Analysis of code form706/47, Ruled-based reasoning system706/59, Creation or modification707/100, DATABASE SCHEMA OR DATA STRUCTURE717/116Object orientedExaminersPrimary: Hafiz, Tariq R.Assistant: Dam, Tuan Q. Attorney, Agent or FirmInternational ClassG06F 009/44AbstractA mechanism is provided that transforms a class hierarchy of an object-oriented program to a new class hierarchy based upon a set of rules. The new class hierarchy is constructed by transforming a class hierarchy based upon a set of transformation rules which perform one of the following operations: i) merging of two classes; ii) removing a virtual inheritance relation; and iii) replacing a virtual inheritance relation with a non-virtual inheritance relation. The transformation is preferably generated on either a specialized class hierarchy or a class hierarchy obtained by class hierarchy slicing. Thus, the new class hierarchy is a simplification of the inheritance structure, which may result in a reduction in the number of compiler-generated fields in objects, and hence in a reduction of object size of the program.Other References
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