Software system maintainability evaluation and improvement method based on multi-objective community discovery

Abstract

The invention provides a software system maintainability evaluation and promotion method based on multi-objective community detection. The software system maintainability evaluation and promotion method comprises the following steps: 1) constructing a maximum weakly connected subgraph; 2) calling the maximum weakly connected subgraph by a partition method, and calculating different method community cohesions of each class; 3) calculating the Spearman correlation coefficients of different method community cohesions, selecting two community partitioning algorithms with the maximum correlation coefficient to calculate the modularity of a software system, and evaluating software system maintainability; and 4) on the basis of the method community cohesions of each class, filtering classes with the low cohesion by adopting an adaptive threshold value filtering algorithm, wherein certain methods in the classes are in close connection with other classes, and the methods are removed to improve the cohesions of the classes and the modularity of the software system and improve the software system maintainability. The cohesions of the classes in the software system are improved, and the modularity of the whole software system is improved so as to improve the software system maintainability.

Description

Technical field: [0001] The invention belongs to the cross field of trusted software and software testing, and in particular relates to a method for evaluating and improving the maintainability of a software system. Background technique: [0002] The software system is composed of many modules, relying on the mutual calls between modules to complete various complex functions, the quality of software modularity will directly affect the realization of software functions, the operating efficiency of the system and the overall stability. The goal of software engineering is to use new technologies and correct management methods to improve the quality and survival rate of software, so that software systems have higher maintainability, reliability and reusability. [0003] Object-oriented technology adopts data abstraction, encapsulation, polymorphism, information hiding, reuse and other mechanisms to enhance the maintainability of software and improve production efficiency. In or...

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Problems solved by technology

[0004] Developing a software system with high cohesion and low coupling is widely considered to be a software structure with relatively good modularity. Cohesion is the relationship between modules. High cohesion means that each module of the software is cohesive and closely related. For this research Staff have proposed a series of class cohesion measurement methods, such as: LCOM1, Coh, TCC, LCC, SCOM, CCM, etc. These methods are basically based on the use and sharing of instance variables in the class by methods in the class , only considering the relationship between methods and variables, methods and methods in the class, but these measurement methods cannot effectively evaluate and improve the maintainability of software systems

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