Design Patterns from Theory to Practice

2011 ◽  
pp. 1047-1052
Author(s):  
Jing Dong ◽  
Tu Peng ◽  
Yongtao Sun ◽  
Longji Tang ◽  
Yajing Zhao
Keyword(s):  
Design Pattern ◽  
Design Patterns ◽  
Research Work ◽  
Software Systems ◽  
Original Design ◽  
Design Problems ◽  
Design Decisions ◽  
Related Information ◽  
Theory To Practice

Design patterns (Gamma, Helm, Johnson, & Vlissides, 1995) extract good solutions to standard problems in a particular context. Modern software industry has widely adopted design patterns to reuse best practices and improve the quality of software systems. Each design pattern describes a generic piece of design that can be instantiated in different applications. Multiple design patterns can be integrated to solve different design problems. To precisely and unambiguously describe a design pattern, formal specification methods are used. Each design pattern presents extensible design that can evolve after the pattern is applied. While design patterns have been applied in many large systems, pattern-related information is generally not available in source code or even the design model of a software system. Recovering pattern-related information and visualizing it in design diagrams can help to understand the original design decisions and tradeoffs. In this article, we concentrate on the issues related to design pattern instantiation, integration, formalization, evolution, visualization, and discovery. We also discuss the research work addressing these issues.

scholarly journals Searching Design Patterns Fast by Using Tree Traversals

2015 ◽  
Vol 61 (4) ◽  
pp. 321-326
Author(s):  
Stefano Cicciarella ◽  
Christian Napoli ◽  
Emiliano Tramontana
Keyword(s):  
Design Pattern ◽  
Design Patterns ◽  
Software Systems ◽  
Software System ◽  
Large Software ◽  
Tree Traversals

Abstract Large software systems need to be modified to remain useful. Changes can be more easily performed when their design has been carefully documented. This paper presents an approach to quickly find design patterns that have been implemented into a software system. The devised solution greatly reduces the performed checks by organising the search for a design pattern as tree traversals, where candidate classes are carefully positioned into trees. By automatically tagging classes with design pattern roles we make it easier for developers to reason with large software systems. Our approach can provide documentation that lets developers understand the role each class is playing, assess the quality of the code, have assistance for refactoring and enhancing the functionalities of the software system.

scholarly journals Design pattern instantiation directed by concretization and specialization

2011 ◽  
Vol 8 (1) ◽  
pp. 41-72
Author(s):  
Peter Kajsa ◽  
Lubomir Majtas ◽  
Pavol Navrat
Keyword(s):  
System Design ◽  
Design Pattern ◽  
Design Patterns ◽  
Model Transformations ◽  
Levels Of Abstraction ◽  
Design Problems ◽  
Semantic Extension ◽  
And Control ◽  
Model Structures

Design patterns provide an especially effective way to improve the quality of a software system design as they provide abstracted, generalized and verified solutions of non-trivial design problems that occur repeatedly. The paper presents a method of design pattern instantiation support based on the key principles of both MDD and MDA. The method allows specification of the pattern instance occurrence via the semantic extension of UML directly on the context. The rest of the pattern instantiation is automated by model transformations of the specified pattern instances to lower levels of abstraction. Such approach enables the use of higher levels of abstraction in the modeling of patterns. Moreover, the model transformations are driven by models of patterns besides the instance specification, and thus the approach provides very useful ways how to determine and control the results of transformations. The method is not limited to design pattern support only, it also provides a framework for the addition of support for custom model structures which are often created in models mechanically.

A REVIEW OF DESIGN PATTERN MINING TECHNIQUES

2009 ◽  
Vol 19 (06) ◽  
pp. 823-855 ◽  
Author(s):  
JING DONG ◽  
YAJING ZHAO ◽  
TU PENG
Keyword(s):  
Design Patterns ◽  
Architectural Design ◽  
Pattern Mining ◽  
Source Code ◽  
Software Systems ◽  
Software System ◽  
Original Design ◽  
Trace Back ◽  
Mining Design

The quality of a software system highly depends on its architectural design. High quality software systems typically apply expert design experience which has been captured as design patterns. As demonstrated solutions to recurring problems, design patterns help to reuse expert experience in software system design. They have been extensively applied in the industry. Mining the instances of design patterns from the source code of software systems can assist in the understanding of the systems and the process of re-engineering them. More importantly, it also helps to trace back to the original design decisions, which are typically missing in legacy systems. This paper presents a review on current techniques and tools for mining design patterns from source code or design of software systems. We classify different approaches and analyze their results in a comparative study. We also examine the disparity of the discovery results of different approaches and analyze possible reasons with some insight.

ANALYZING AND IMPROVING WEB APPLICATION QUALITY USING DESIGN PATTERNS

2012 ◽  
Vol 2 (2) ◽  
pp. 112-116
Author(s):  
Shikha Bhatia ◽  
Mr. Harshpreet Singh
Keyword(s):  
Web Application ◽  
Design Pattern ◽  
Design Patterns ◽  
Web Applications ◽  
Past Research ◽  
Software Systems ◽  
Interactive Software ◽  
Web Based ◽  
Software Application ◽  
Execution Speed

With the mounting demand of web applications, a number of issues allied to its quality have came in existence. In the meadow of web applications, it is very thorny to develop high quality web applications. A design pattern is a general repeatable solution to a generally stirring problem in software design. It should be noted that design pattern is not a finished product that can be directly transformed into source code. Rather design pattern is a depiction or template that describes how to find solution of a problem that can be used in many different situations. Past research has shown that design patterns greatly improved the execution speed of a software application. Design pattern are classified as creational design patterns, structural design pattern, behavioral design pattern, etc. MVC design pattern is very productive for architecting interactive software systems and web applications. This design pattern is partition-independent, because it is expressed in terms of an interactive application running in a single address space. We will design and analyze an algorithm by using MVC approach to improve the performance of web based application. The objective of our study will be to reduce one of the major object oriented features i.e. coupling between model and view segments of web based application. The implementation for the same will be done in by using .NET framework.

iPattern

2017 ◽  
Vol 6 (2) ◽  
pp. 12-27
Author(s):  
Youmna Bassiouny ◽  
Rimon Elias ◽  
Philipp Paulsen
Keyword(s):  
Design Pattern ◽  
Design Patterns ◽  
Three Dimensional ◽  
Computational Design ◽  
Pattern Design ◽  
Design Problems ◽  
Innovative Design ◽  
Rule Based ◽  
Science And Art ◽  
Design Software

Computational design takes a computer science view of design, applying both the science and art of computational approaches and methodologies to design problems. This article proposes to convert design methodologies studied by designers into rule-based computational design software and help them by providing suggestions for designs to build upon given a set of primitive shapes and geometrical rules. iPattern is a pattern-making software dedicated to designers to generate innovative design patterns that can be used in a decorative manner. They may be applied on wallpapers, carpets, fabric textiles, three-dimensional lanterns, tableware, etc. The purpose is to create a modern pattern design collection that adds a new essence to the place. In order to generate creative design patterns, primitive shapes and geometrical rules are used. The generated design pattern is constructed based on the grid of the Flower of Life of the sacred geometry or similar grids constructed using primitive shapes (rectangles, squares and triangles) combined in the layout of the Flower of Life.

A Multi-Agent-Based Approach for Critical Components Identification and Testing

2017 ◽  
pp. 657-678
Author(s):  
D. Jeya Mala ◽  
R. Iswarya
Keyword(s):  
Crucial Role ◽  
Research Work ◽  
Software Systems ◽  
Test Cases ◽  
Agent Based ◽  
Multi Agent ◽  
Adequacy Criterion ◽  
Critical Components ◽  
Test Adequacy

In real time software systems, testing plays a crucial role as any of the critical components in these systems are left undetected, then inadvertent effects will happen which will lead to erroneous operations, system failure, high cost and resource wastage etc. To address this most important and the emergent problem, this research work proposes an effective method by means of multi-agents based approach to identify such critical components and execute test cases along the critical test paths which will aid in effectively covering them during testing. Finally, this paper also compared the performance with existing approaches in terms of time taken for the search process and the component coverage based test adequacy criterion to ensure quality of the software.

A General Framework to Detect Design Patterns by Combining Static and Dynamic Analysis Techniques

2021 ◽  
Vol 31 (01) ◽  
pp. 21-54
Author(s):  
Cong Liu
Keyword(s):  
Dynamic Analysis ◽  
Open Source ◽  
Design Pattern ◽  
Design Patterns ◽  
General Framework ◽  
Process Mining ◽  
Pattern Detection ◽  
Software Systems ◽  
Static And Dynamic Analysis ◽  
Analysis Techniques

Design pattern detection can provide useful insights to support software comprehension. Accurate and complete detection of pattern instances are extremely important to enable software usability improvements. However, existing design pattern detection approaches and tools suffer from the following problems: incomplete description of design pattern instances, inaccurate behavioral constraint checking, and inability to support novel design patterns. This paper presents a general framework to detect design patterns while solving these issues by combining static and dynamic analysis techniques. The framework has been instantiated for typical behavioral and creational patterns, such as the observer pattern, state pattern, strategy pattern, and singleton pattern to demonstrate the applicability. Based on the open-source process mining toolkit ProM, we have developed an integrated tool that supports the whole detection process for these patterns. We applied and evaluated the framework using software execution data containing around 1,000,000 method calls generated from eight synthetic software systems and three open-source software systems. The evaluation results show that our approach can guarantee a higher precision and recall than existing approaches and can distinguish state and strategy patterns that are indistinguishable by the state-of-the-art.

Modeling Design Patterns for Semi-Automatic Reuse in System Design

2012 ◽  
pp. 29-56
Author(s):  
Galia Shlezinger ◽  
Iris Reinhartz-Berger ◽  
Dov Dori
Keyword(s):  
System Design ◽  
Software Quality ◽  
Design Pattern ◽  
Design Patterns ◽  
Design Problems ◽  
Suggested Approach ◽  
Main Design ◽  
Analysis And Design ◽  
Correct Usage

Design patterns provide reusable solutions for recurring design problems. They constitute an important tool for improving software quality. However, correct usage of design patterns depends to a large extent on the designer. Design patterns often include models that describe the suggested solutions, while other aspects of the patterns are neglected or described informally only in text. Furthermore, design pattern solutions are usually described in an object-oriented fashion that is too close to the implementation, masking the essence of and motivation behind a particular design pattern. We suggest an approach to modeling the different aspects of design patterns and semi-automatically utilizing these models to improve software design. Evaluating our approach on commonly used design patterns and a case study of an automatic application for composing, taking, checking, and grading analysis and design exams, we found that the suggested approach successfully locates the main design problems modeled by the selected design patterns.

A Multi Agent Based Approach for Critical Components Identification and Testing

2014 ◽  
Vol 4 (1) ◽  
pp. 21-38 ◽  
Author(s):  
D. Jeya Mala ◽  
R. Iswarya
Keyword(s):  
Research Work ◽  
Software Systems ◽  
Test Cases ◽  
Critical Test ◽  
Agent Based ◽  
Multi Agent ◽  
Critical Components ◽  
Test Adequacy ◽  
Multi Agents

In real time software systems, testing plays a crucial role as any of the critical components in these systems are left undetected, then inadvertent effects will happen which will lead to erroneous operations, system failure, high cost and resource wastage etc. To address this most important and the emergent problem, this research work proposes an effective method by means of multi-agents based approach to identify such critical components and execute test cases along the critical test paths which will aid in effectively covering them during testing. Finally, this paper also compared the performance with existing approaches in terms of time taken for the search process and the component coverage based test adequacy criterion to ensure quality of the software.

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