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Title
Japanese: 
English:LEAD++: An Object-Oriented Reflective Language for Dynamically Adaptable Software Model 
Author
Japanese: 天野憲樹, 渡部 卓雄.  
English: Noriki Amano, Takuo Watanabe.  
Language English 
Journal/Book name
Japanese: 
English:IEICE Transactions on Fundamental of Electronics, Communications and Computer Science 
Volume, Number, Page Vol. E82-A    No. 6    pp. 1009-1016
Published date June 25, 1999 
Publisher
Japanese: 
English:IEICE 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
Official URL https://search.ieice.org/bin/summary.php?id=e82-a_6_1009&category=A&lang=E&year=1999&abst=
 
Abstract A software system has dynamic adaptability if it can adapt itself to dynamically changing runtime environments. As open-ended distributed systems and mobile computing systems have spread widely, the need for software systems with dynamic adaptability increases. We propose a software model with dynamic adaptability called DAS and its description language LEAD++. The basic mechanism for dynamic adaptability is called adaptable procedure. An adaptable procedure is a special kind of generic procedures (functions) whose methods are selected based upon the state of its runtime environment. Furthermore, control mechanisms of adaptable procedures -- including method selection strategies -- are realized using generic procedures. This sort of reflective architecture enables us to write a dynamically adaptable software system in highly flexible, extensible, readable and maintainable way. LEAD++ is an object-oriented reflective language that provides adaptable procedures and their control mechanisms as its basic language functionalities. We are currently implementing a prototype of LEAD++ as a pre-processor of Java. Using LEAD++, we can systematically describe dynamically adaptable applets, mobile objects, etc.

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