Fingerprint subtype checking

Details Fingerprint subtype checking Fingerprint subtype checking

2007-05-08

2007-05-08

Zhen, Wei (Department: 2191)

Data processing: software development, installation, and managem

Software program development tool

Code generation

C717S116000

Reexamination Certificate

active

10410020

ABSTRACT:
One or more fingerprints may be utilized in each class in order to allow for faster subtype checking. A subclass fingerprint may be utilized to track the superclasses of a class, and an interface fingerprint may be utilized to track the locally declared interfaces of the class and any interfaces which it inherits. This allows for subtype checking that is extremely fast and efficient by utilizing comparison and other logical operations during the checking.

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Cliff Click, John Rose, “Fast subtype checking in the HotSpot JVM”, Nov. 2002, Proceedings of the 2002 joint ACM-ISCOPE conference on Java Grandep. p. 96-103.
Bruce et al., “Safe and decidable type checking in an object-oriented language”, Oct. 1993, ACM SIGPLAN Notices , Proceedings of the eigth annual conference on Object-oriented programming systems, languages, and applications OOPSLA '93, vol. 28 Issue 10, p. 29-46.
Vitek et al., “Efficient type inclusion tests”, Oct. 1997, ACM SIGPLAN Notices , Proceedings of the 12th ACM SIGPLAN conference on Object-oriented programming, systems, languages, and applications OOPSLA '97, vol. 32 Issue 10, p. 142-157.

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