Capa do livro de Controlling Visibility of Class Extensions
Título do livro:

Controlling Visibility of Class Extensions

Classboxes

VDM Verlag Dr. Müller (2009-06-16 )

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ISBN- 1 3:

978-3-639-16518-0

ISBN- 1 0:
3639165187
EAN:
9783639165180
Idioma do livro:
Inglês
Anotações e citações/ texto breve:
Unanticipated changes to complex software systems can introduce anomalies such as duplicated code, suboptimal inheritance relationships and a proliferation of run-time downcasts. Refactoring to eliminate these anomalies may not be an option, at least in certain stages of software evolution. A class extension is a method that is defined in a module, but whose class is defined elsewhere. Class extensions offer a convenient way to incrementally modify existing classes when subclassing is inappropriate. Unfortunately existing approaches suffer from various limitations. Either class extensions have a global impact or they have a purely local impact, with negative results for collaborating clients. Furthermore, conflicting class extensions are either disallowed, or resolved by linearization, with subsequent negative effects. To solve these problems we present classboxes, a module system for object-oriented languages that provides for behavior refinement (i.e., method addition and replacement). Moreover, the changes made by a classbox are only visible to that classbox (or classboxes that import it), a feature we call local rebinding.
Editora:
VDM Verlag Dr. Müller
Website:
http://www.vdm-verlag.de
Por (autor):
Alexandre Bergel
Número de páginas:
156
Publicado em:
2009-06-16
Stock:
Disponível
Categoria:
Informática, IT
Preço:
59.00 €
Palavras chave:
software engineering, code evolution

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