Controlling Visibility of Class Extensions: Classboxes - Couverture souple

Bergel, Alexandre

Couverture souple

ISBN 10 : 3639165187 ISBN 13 : 9783639165180

Editeur : VDM Verlag, 2009

Synopsis

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.

A propos du livre

À propos de l?auteur

Alexandre Bergel is Assistant Professor at the University of Chile. He obtained his PhD in 2005 from the University of Berne, Switzerland, under the supervision of Prof. Nierstrasz and Prof. Ducasse.

Détails de l'édition

• Éditeur: VDM Verlag
• Date d'édition: 2009
• Langue: anglais
• ISBN 10: 3639165187
• ISBN 13: 9783639165180
• Reliure: Broché
• Nombre de pages: 156
• Coordonnées du fabricant: non disponible
• Personne responsable: non disponible