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IEICE TRANSACTIONS on Information

Changes of Evaluation Values on Component Rank Model by Taking Code Clones into Consideration

Reishi YOKOMORI, Norihiro YOSHIDA, Masami NORO, Katsuro INOUE

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Summary :

There are many software systems that have been used and maintained for a long time. By undergoing such a maintenance process, similar code fragments were intentionally left in the source code of such software, and knowing how to manage a software system that contains a lot of similar code fragments becomes a major concern. In this study, we proposed a method to pick up components that were commonly used in similar code fragments from a target software system. This method was realized by using the component rank model and by checking the differences of evaluation values for each component before and after merging components that had similar code fragments. In many cases, components whose evaluation value had decreased would be used by both the components that were merged, so we considered that these components were commonly used in similar code fragments. Based on the proposed approach, we implemented a system to calculate differences of evaluation values for each component, and conducted three evaluation experiments to confirm that our method was useful for detecting components that were commonly used in similar code fragments, and to confirm how our method can help developers when developers add similar components. Based on the experimental results, we also discuss some improvement methods and provide the results from applications of these methods.

Publication
IEICE TRANSACTIONS on Information Vol.E101-D No.1 pp.130-141
Publication Date
2018/01/01
Publicized
2017/10/05
Online ISSN
1745-1361
DOI
10.1587/transinf.2017EDP7125
Type of Manuscript
PAPER
Category
Software System

Authors

Reishi YOKOMORI
  Nanzan University
Norihiro YOSHIDA
  Nagoya University
Masami NORO
  Nanzan University
Katsuro INOUE
  Osaka University

Keyword