Jafar M. Al-Kofahi

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Model-Driven Engineering (MDE) has become an important development framework for many large-scale software. Previous research has reported that as in traditional code-based development, cloning also occurs in MDE. However, there has been little work on clone detection in models with the limitations on detection precision and completeness. This paper(More)
Locating buggy code is a time-consuming task in software development. Given a new bug report, developers must search through a large number of files in a project to locate buggy code. We propose BugScout, an automated approach to help developers reduce such efforts by narrowing the search space of buggy files when they are assigned to address a bug report.(More)
Previous research confirms the existence of <i>recurring bug fixes</i> in software systems. Analyzing such fixes manually, we found that a large percentage of them occurs in <i>code peers</i>, the classes/methods having the similar roles in the systems, such as providing similar functions and/or participating in similar object interactions. Based on(More)
Recent research results suggest a need for code clone management. In this paper, we introduce JSync, a novel clone management tool. JSync provides two main functions to support developers in being aware of the clone relation among code fragments as software systems evolve and in making consistent changes as they create or modify cloned code. JSync(More)
The interplay of multiple objects in object-oriented programming often follows specific protocols, for example certain orders of method calls and/or control structure constraints among them that are parts of the intended object usages. Unfortunately, the information is not always documented. That creates long learning curve, and importantly, leads to subtle(More)
Bug triaging aims to assign a bug to the most appropriate fixer. That task is crucial in reducing time and efforts in a bug fixing process. In this paper, we propose Bugzie, a novel approach for automatic bug triaging based on fuzzy set and cache-based modeling of the bug-fixing expertise of developers. Bugzie considers a software system to have multiple(More)
Software tagging has been shown to be an efficient, lightweight social computing mechanism to improve different social and technical aspects of software development. Despite the importance of tags, there exists limited support for automatic tagging for software artifacts, especially during the evolutionary process of software development. We conducted an(More)
Code clone management has been shown to have several benefits for software developers. When source code evolves, clone management requires a mechanism to efficiently and incrementally detect code clones in the new revision. This paper introduces an incremental clone detection tool, called ClemanX. Our tool represents code fragments as subtrees of Abstract(More)
Recent research results show several benefits of the management of code clones. In this paper, we introduce Clever, a novel clone-aware software configuration management (SCM) system. In addition to traditional SCM functionality, Clever provides clone management support, including clone detection and update, clone change management, clone consistency(More)
Structure-oriented approaches in clone detection have become popular in both code-based and model-based clone detection. However, existing methods for capturing structural information in software artifacts are either too computationally expensive to be efficient or too light-weight to be accurate in clone detection. In this paper, we present Exas, an(More)