Rule-based engine for transformation of class hierarchy of an object-oriented program
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United States of America Patent
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Nov 9, 1999
Grant Date -
N/A
app pub date -
Oct 2, 1997
filing date -
Oct 2, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A 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.
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