A Metric-Based Heuristic Framework to Detect Object-Oriented Design Flaws

One of the important activities in re-engineering pro-cess is detecting design flaws. Such design flaws prevent an efficient maintenance, and further development of a sys-tem. This research proposes a novel metric-based heuristic framework to detect and locate object-oriented design flaws from the source code. It is accomplished by evaluating de-sign quality of an object-oriented system through quantify-ing deviations from good design heuristics and principles. While design flaws can occur at any level, the proposed ap-proach assesses the design quality of internal and external structure of a system at the class level which is the most fundamental level of a system. In a nutshell, design flaws are detected and located systematically in two phases using a generic OO design knowledge-base. In the first phase, hotspots are detected by primitive classifiers via measuring metrics indicating a design feature (e.g. complexity). In the second phase, individual design flaws will be detected by composite classifiers using a proper set of metrics. We have chosen JBoss Application Server as the case study, due to its pure OO large size structure, and its success as an open source J2EE platform among developers. 1