Improvement and Implementation of Code Clone Visualization Method Based on Academic-industrial Collaboration

サンガク　レンケイ　二　モトヅイタ　コードクローン　カシカ　シュホウ　ノ　カイリョウ　ト　ジッソウ

ヒゴ, ヨシキ

Higo, Yoshiki

吉田, 則裕

ヨシダ, ノリヒロ

Yoshida, Norihiro

楠本, 真二

クスモト, シンジ

Kusumoto, Shinji

井上, 克郎

イノウエ, カツロウ

Inoue, Katsuro

ジョウホウ　ショリ　ガッカイ

Maintaining software systems becomes more difficult as the size and complexity of software increase. One of the factors that makes software maintenance more difficult is the presence of code clones. A code clone is a code fragment which has identical or similar code fragments to it in source code. Code clones are introduced by various reasons such as reusing code by 'copy-and-paste'. If we modify a code clone with many similar code fragments, it is necessary to consider whether or not we have to modify each of them. For supporting software maintenance against code cloning, we have developed a code clone detection tool, CCFinder and a code clone visualization tool, Gemini. These tool have been delivered to domestic or overseas organizations/individuals. Also, we have held code clone seminars that provide opportunities for discussions between developers and users of the tools. Through the seminars, we can get what industrial people really require. In addition to seminars, we are managing a mailing list. Users ask about how to use the tools and require new functionalities that they want, and developers announce a version upgrade of the tools and the date for next seminar. As a result, we were able to improve our visualization method and succeed to refine it as a practical one. We re-implemented Gemini based on the improvements as a tool which can be used in practice. In this paper, we describe how we are promoting academic-industrial collaboration and how the visualization method was improved. Moreover, We applied new Gemini to a system which was co-developed by 5 Japanese companies. Application results demonstrate the usefulness and capability of new Gemini.

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吉田, 則裕

楠本, 真二

井上, 克郎