scholarly journals Detecting Design Patterns in Object-Oriented Program Source Code by Using Metrics and Machine Learning

2014 ◽  
Vol 07 (12) ◽  
pp. 983-998 ◽  
Author(s):  
Satoru Uchiyama ◽  
Atsuto Kubo ◽  
Hironori Washizaki ◽  
Yoshiaki Fukazawa
Author(s):  
Tran Thanh Luong ◽  
Le My Canh

JavaScript has become more and more popular in recent years because its wealthy features as being dynamic, interpreted and object-oriented with first-class functions. Furthermore, JavaScript is designed with event-driven and I/O non-blocking model that boosts the performance of overall application especially in the case of Node.js. To take advantage of these characteristics, many design patterns that implement asynchronous programming for JavaScript were proposed. However, choosing a right pattern and implementing a good asynchronous source code is a challenge and thus easily lead into less robust application and low quality source code. Extended from our previous works on exception handling code smells in JavaScript and exception handling code smells in JavaScript asynchronous programming with promise, this research aims at studying the impact of three JavaScript asynchronous programming patterns on quality of source code and application.


2014 ◽  
Author(s):  
Guinther de B. Pauli ◽  
Eduardo K. Piveta

It is difficult to maintain and to adapt poorly written code presenting shortcomings in its structure. Refactoring techniques are used to improve thecode and the structure of applications, making them better and easier to modify. Design patterns are reusable solutions used in similar problems in object-oriented systems, so there is no need to recreate the solutions. Applying design patterns in the context of refactoring in a corrective way becomes a desired activity in the life cycle of a specific software system. However, in large-scale projects, the manual examination of artefacts to find problems and opportunities to apply a design pattern is a hard task. In this context, wepresent a metric-based heuristic function to detect where the Strategy designpattern can be applied in a given project. To evaluate the heuristic functionand its results we have also built a tool to show the results. This tool canexamine source code using ASTs (Abstract Syntax Trees), searching for opportunities to apply the Strategy pattern, indicating the exact location in the source code where the pattern is suggested, also showing some evidences usedin the detection.


2001 ◽  
Vol 33 (4) ◽  
pp. 68-70 ◽  
Author(s):  
Joseph E. Lang ◽  
Brian R. Bogovich ◽  
Sean C. Barry ◽  
Brian G. Durkin ◽  
Michael R. Katchmar ◽  
...  

e-xacta ◽  
2016 ◽  
Vol 9 (1) ◽  
pp. 37
Author(s):  
Cristiano Martins Monteiro ◽  
Flavianne Braga Campos de Lima ◽  
Carlos Renato Storck

<p>A geração automática de código-fonte é uma prática adotada no desenvolvimento de softwares para agilizar, facilitar e padronizar a implementação dos projetos. Embora seja uma prática comum nas fábricas de software, não se conhece uma ferramenta que permita escolher o padrão de projeto a ser usado. O objetivo principal deste trabalho é apresentar um gerador de códigos para o desenvolvimento de sistemas Web a partir de uma modelagem entidade-relacionamento, uma linguagem de programação e um padrão de projeto determinados pelo usuário. Os objetivos específicos são propor uma arquitetura do sistema capaz de adequar e reaproveitar diferentes padrões de projeto, linguagens de programação e projetos cadastrados; permitir que o usuário cadastre, altere, exclua, importe e exporte um projeto; e gerar automaticamente o seu código-fonte e scripts de banco de dados. Este trabalho se justifica pela importância de reduzir erros de codificação; e evitar perca tempo ao realizar atividades rotineiras de implementação de padrões de projeto. Possibilitando assim, maior dedicação no planejamento das regras de negócios e redução de custos. A ferramenta proposta (GCER) foi desenvolvida em linguagem Java com o uso banco de dados Oracle 11g, e seguindo os padrões DAO e MVC. Os resultados foram avaliados através da geração e compilação de códigos de um projeto para cadastro de veículos. A geração com êxito evidencia a viabilidade da ferramenta proposta para a geração automática de códigos no processo de desenvolvimento de software.</p><p>Abstract</p><p>The automatic generation of source code is a practice adopted in the development of software to streamline, facilitate and standardize the implementation of projects. Although it be a common practice in software factories, it is not known a tool able to choose the design pattern to be used. The main objective of this paper is to present a code generator for the development of Web systems from an entity-relationship modeling, a programming language and a design pattern determined by the user. The specific objectives are to propose a system architecture able to suit and reuse different design patterns, programming languages and saved projects; allow the user to insert, update, delete, import and export a project; and automatically generate the source code and database scripts. This work is justified by the importance to reduce errors of coding; and to avoid waste of time in the development of Web systems performing routine tasks. Allowing, then, a greater dedication in the planning of business rules and the reduction of costs. The tool proposed (GCER) was developed in Java with the database using Oracle 11g, and following the DAO and MVC patterns. The results were evaluated by generating and compiling codes of a project for vehicle registration. The successful code generation demonstrate the feasibility of the proposed tool for the automatic generation of code in the software development process.</p>


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