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In this paper, we present case studies of recovering structural design patterns from object-oriented source code. The proposed recovery technique is based on the use of visual language parsing techniques, and is supported by a visual environment automatically produced by a grammar based visual environment generator. We have applied the recovery technique to public-domain programs and libraries obtaining...
Recovering the architecture is the first step towards reengineering a software system. Many reverse engineering tools use top-down exploration as a way of providing a visual and interactive process for architecture recovery. During the exploration process, the user navigates through various views on the system by choosing from several exploration operations. Although some sequences of these operations...
Migration of form based legacy systems towards service-oriented computing is a challenging task, requiring the adaptation of the legacy interface to the interaction paradigm of Web services. In this paper a flexible wrapper supporting a process for making accessible functionalities of legacy systems as Web services is presented
The high cost of software maintenance could potentially be greatly reduced by the automatic refactoring of object-oriented programs to increase their understandability, adaptability and extensibility. This paper describes a novel approach in providing automated refactoring support for software maintenance; the formulation of the task as a search problem in the space of alternative designs. Such a...
Database reengineering consists in deriving a new database from a legacy database and adapting associated software components accordingly. This migration process typically involves three main steps, namely schema conversion, data conversion and program conversion. This paper presents a wrapper-based approach to automating the program conversion step. The proposed approach combines program transformations...
Adapting software components usable by a particular application is a crucial issue in software component based technology. In fact, software components can be used in contexts that can be different from the context assumptions made by the component designers. We present in this paper a tool aiming at adapting software component structure. Among the motivations of this kind of adaptation, we note its...
When reengineering legacy systems, it is crucial to assess if the legacy behavior has been preserved or how it changed due to the reengineering effort. Ideally if a legacy system is covered by tests, running the tests on the new version can identify potential differences or discrepancies. However, writing tests for an unknown and large system is difficult due to the lack of internal knowledge. It...
Design patterns are important in software maintenance because they help in designing, in understanding, and in re-engineering programs. The identification of occurrences of a design pattern consists in identifying, in a program, classes which structure and organisation match - strictly or approximately - the structure and organisation of classes as suggested by the design pattern. We express the problem...
It is observed that most object oriented coupling metrics are macroscopic, which makes them unsuitable for making finer refactoring decisions. The notions of microscopic viewpoints and coupling projections are introduced. Existing metrics are classified in terms of viewpoints and projections. Two microscopic metrics called relative method coupling (RMC) and relative inward coupling (RIC) are introduced,...
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