基于Java的软件再工程支持工具研究

Internet的发展和构件化的软件开发为再工程指明了新的方向。面向对象软件再工程将以构件库为中心,并关注于将遗产系统改造为B/S结构的Internet应用。论文提出了一个面向对象软件再工程模型,分析了面向对象软件再工程支持工具的特性,然后介绍了基于Java的再工程支持工具原型。     

Developing GIS Applications with Objects: A Design Patterns Approach

In this paper we present an object-oriented approach for designing GIS applications; it combines well known software engineering practices with the use of design patterns as a conceptual tool to cope with recurrent problems appearing in the GIS domain. Our approach allows the designer to decouple the conceptual definition of application objects from their spatial representation. In this way, GIS applications can evolve smoothly, because maintenance is achieved by focusing on different concerns at different times. We show that our approach is also useful to support spatial features in conventional applications built with object-oriented technology. The structure of this paper is as follows: We first introduce design patterns, an efficient strategy to record design experience; then we discuss the most common design problems a developer of GIS applications must face. The core of our method is then presented by explaining how the use of decorators helps in extending objects to incorporate spatial attributes and behavior. Next, we analyze some recurrent design problems in the GIS domain and present some new patterns addressing those problems. Some further work is finally discussed.     

面向Agent的软件设计模式

设计模式针对一类在特定上下文中反复出现的问题给出了通用解决方案,模式的提取和重用有助于提高软件开发的效率和质量,其思想和方法已在面向对象软件工程中得到广泛应用和验证。我们认为同一问题采用不同的实现技术往往具有不同的设计形态,不同软件开发范型也有其各自不同的设计模式。作为一种新颖的软件开发范型,近年来面向Agent软件工程的研究取得了长足进展,如何提高软件Agent技术实用性,发挥其技术潜力,扩大其应用范围成为当前人们关注的焦点。本文将模式思想引入到面向Agent软件工程,针对软件Agent技术的特点,从组织结构、交互协作和个体Agent体系结构三个视点提出了一组面向Agent的软件设计模式,以支持多Agent系统的设计;并进一步给出了面向Agent设计模式的描述框架,进行了典型设计模式和应用案例的分析。     

设计模式在3G综合业务管理平台中的应用

设计模式在面向对象软件开发领域中得到了广泛的应用,增强了代码的重用性、灵活性和模块化,提高了系统开发的效率。成功运用设计模式的关键在于系统设计者能够准确地理解应用场景和预测使用模式后产生的效果。文章通过在一个3G综合业务管理平台中引入设计模式,阐述了Filter模式、Adapter模式在综合业务管理系统中的应用。     

Using Reusable Design Patterns in Distributed Systems

The article revealed the software design issues for the object-oriented distributed system. By surveying several existed design issues, the solution of common design issues is conducted which is compromised by design patterns. Each pattern is described according to its functionality which could be valuable for objected-oriented distributed system developer.     

设计模式在飞行仿真软件中的应用

飞行仿真已经成为飞行控制系统分析、设计和研发过程的一个重要部分,仿真软件的设计是实现仿真目的的关键.面向对象仿真方法是当前飞行仿真软件发展的一个重要方向.而设计模式是面向对象技术的最新进展之一.本文介绍了设计模式的原则与策略,简要描述了飞行仿真系统的结构与主要功能.以此为基础,通过UML类图示例,详细论述了多个设计模式在飞行仿真软件设计中的应用.最后重新设计和开发了数字飞行仿真软件.     

软件设计模式及其使用

文中综述了面向对象软件的各种设计模式，描述了各种模式之间的关系以及它们在软件设计过程中的使用，并对设计模式的进一步发展作了展望。     

MSA-Lab：模型驱动的微服务集成设计平台

从单体系统迁移到微服务系统是当前业界对遗留系统实施再工程化的主流选项之一,基于单体遗留系统的微服务体系架构重构则是实现该迁移的关键步骤.目前学界多集中在微服务识别方法的研究上;业界虽有许多面向微服务架构的遗留系统重构的实践,但缺乏系统性的方法及高效鲁棒的工具.鉴于此,在微服务识别与模型驱动开发方法前期研究的基础上,研发一种模型驱动的、可用于单体遗留系统微服务化重构的集成设计平台MSA-Lab.它通过分析单体遗留系统运行日志中的方法调用序列,对其中的类和数据表进行类型识别和聚类以构造抽象微服务,同时生成包括微服务图和微服务序列图在内的系统架构设计模型.它包括用于微服务自动识别与设计模型自动生成的核心部件MSA-Generator,以及用于微服务静态结构模型与动态行为模型可视化展现、交互式建模、模型语法约束检验的核心部件MSA-Modeller.在MSA-Lab平台上,通过对4个开源项目实施有效性、鲁棒性、功能转换完备性等实验以及对3个同类型工具实施性能对比实验,结果表明:所提平台拥有很好的有效性、鲁棒性及实现面向日志的功能转换完备性,且性能更加优越.     

A graph mining approach for detecting identical design structures in object-oriented design models

The object-oriented approach has been the most popular software design methodology for the past twenty-five years. Several design patterns and principles are defined to improve the design quality of object-oriented software systems. In addition, designers can use unique design motifs that are designed for the specific application domains. Another commonly used technique is cloning and modifying some parts of the software while creating new modules. Therefore, object-oriented programs can include many identical design structures. This work proposes a sub-graph mining-based approach for detecting identical design structures in object-oriented systems. By identifying and analyzing these structures, we can obtain useful information about the design, such as commonly-used design patterns, most frequent design defects, domain-specific patterns, and reused design clones, which could help developers to improve their knowledge about the software architecture. Furthermore, problematic parts of frequent identical design structures are appropriate refactoring opportunities because they affect multiple areas of the architecture. Experiments with several open-source and industrial projects show that we can successfully find many identical design structures within a project (intra-project) and between different projects (inter-project). We observe that usually most of the detected identical structures are an implementation of common design patterns; however, we also detect various anti-patterns, domain-specific patterns, reused design parts and design-level clones.     

Reengineering for Parallelism: an entry point into PLPP for legacy applications

Many parallel programs begin as legacy sequential code that is later reengineered to take advantage of parallel hardware. This paper presents a pattern called Reengineering for Parallelism to help with this task. The new pattern is intended to be used in conjunction with PLPP (Pattern Language for Parallel Programming), described in our book (Mattson TG, Sanders BA, Massingill BL. Patterns for Parallel Programming. Addison‐Wesley: Reading, MA, 2004). PLPP contains a structured collection of patterns and embodies a methodology for developing parallel programs in which the programmer starts with a good understanding of the problem, works through a sequence of patterns, and finally ends up with the code. Most of the patterns in PLPP are also applicable when reengineering legacy code, but it is not always clear how to get started. Reengineering for Parallelism provides an alternate point of entry into PLPP and addresses particular issues that arise when dealing with legacy code. Copyright © 2006 John Wiley & Sons, Ltd.     

面向对象和模式在嵌入式软件中的应用

由于嵌入式系统的特殊性，长期以来嵌入式软件设计和开发使用的是过程化技术，使用面向对象和模式进行嵌入式软件设计，是一种全新的设计理念。该文描述了面向对象和模式的实现机制，分析了面向对象和模式在嵌入式软件设计和开发中的应用，提出了一个基于面向对象和模式设计的面向通信领域的嵌入式软件平台模型，并给出了基于该平台的上层应用开发模式。     

基于Design Patterns的大型工控软件研究与实践

针对大型工控软件开发面临的各种难题，提出了基于设计模式(Design Patterns)的工控软件设计的解决方案．在大型电力系统监控软件设计中，采用设计模式进行工控软件框架和工位的设计，实现了功能模块的松耦合关系，降低了代码的复杂度，从而提高了运行效率，同时也加快了系统开发、调试的效率．论证了设计模式在工控软件设计中应用的潜力，提出了大型工控软件设计的新思路。     

Formal approach for reengineering fuzzy XML in fuzzy object-oriented databases

Since semi-structured documents (e.g., XML) could benefit greatly from database support and more specifically from object-oriented (OO) database management systems, we study the methodology of reengineering XML to object-oriented databases when database migration occurs in this paper. In particular, considering the need of processing the imprecise and uncertain information existing in practical applications, we investigate the problem of migrating fuzzy XML to fuzzy object-oriented databases. To find the object-oriented schema that best describes the existing fuzzy XML schema (DTD), we devise a comprehensive approach centering on a set of mapping rules. Such reengineering practices could not only provide a significant consolidation of the interoperability between fuzzy OO and fuzzy XML modeling techniques, but also develop the practical design methodology for fuzzy OO databases.     

Converting legacy code into Ada: a cognitive approach

Describes a code conversion tool that helps programmers visualize and understand system design. The author first reviews current software reengineering tools and then describe a new cognitive approach to system (re)engineering based on code comprehension tools that provide a visual representation of code containing less cognitive noise. This better enables programmers to understand system design. The approach integrates code comprehension tools with current reengineering methodologies to create an integrated reengineering workbench for converting legacy code into newer languages such as Ada or C/C++     

组态软件设计中的模式应用

组态软件作为一种在工业上被广泛应用的可配置软件，其设计面临着过多的可变因素。通过在组态软件的开发过程中引入设计模式，可以简化组态软件的结构，提高代码的复用性，并能有效应对将来可能出现的变更。本文着重讨论了Adapter、Bridge、Observer三种设计模式在组态软件设计中的应用。     

基于面向服务架构的遗留系统再设计方法

提出了一种遗留系统再设计的方法,应用改进的层次聚类算法构建遗留代码,能够方便地将代码取出以构建Web服务.该方法支持服务鉴别和服务包装,通过改造有用的遗留代码,经济有效地将遗留系统迁移到面向服务架构中.最后利用上述技术,成功地再现了一个分布式并行计算平台的再设计过程.     

Web应用中的面向对象模型与设计模式

介绍了Web应用中的面向对象模型及其基于XML的建模语言OOWML。它为实现Web应用开发从设计到实现的平滑过渡、提高Web应用的可重用性、开发出高质量的Web应用提供了基础。然后展示了如何在此模型中应用设计模式改善Web应用的设计。     

一种面向对象的软件设计模式库的设计

成功地利用模式可以有效提高软件的开发效率和设计质量,通用模式具有较强的普适性,结合具体领域特点形成的实例模式具有更强、更具体的指导作用。为了实现一个辅助设计模式复用的CASE工具,对设计模式的几个面向对象的原则进行分析,提出了一种面向对象的分布式软件实例模式库来存储设计模式,并给出相应的类层次库组织结构、分布式的交互管理和基于聚类的多级索引方法及面向对象的嵌套索引方法。依此存储模式以更有效地管理和利用模式。     

设计模式中的面向对象原则及其子模式

在[Gamm95]中总结并提出了面向对象软件设计中非常重要的23个设计模式，这些模式尽管形态各异、目的不同，但它们都体现了相同的几个面向对象原则。该文讨论了这些面向对象的原则并对隐含在设计模式中的几个“子模式”进行了分析和总结。     

A Theory of Object-Oriented Design

Progress was made in the understanding of object-oriented (O-O) design through the introduction of patterns of design and architecture. Few works, however, offer methods of precise specification for O-O design.This article provides a well-defined ontology and an underlying framework for the formal specification of O-O design: (1) We observe key design motifs in O-O design and architectures. (2) We provide a computational model in mathematical logic suitable for the discussion in O-O design. (3) We use our conceptual toolkit to analyze and compare proposed formalisms.