Evolvable Pattern Implementations Need Generic Aspects

13 years 9 months ago

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Design patterns are a standard means to create large software systems. However, with standard object-oriented techniques, typical implementations of such patterns are not themselves reusable software entities. Evolution of a program into a ‘patterned’ form (also known as ‘refactoring to patterns’) and subsequent evolution of a ‘patterned’ design is largely left to the programmer. Due to their ability to encapsulate elements that crosscut different modules, aspect languages have the potential to change this situation. For many interesting patterns, a large part of the process of refactoring to patterns can already be implemented modularly in aspects. Still, existing aspect languages can only express a small number of typical patterns implementations in a generally reusable way. In many cases, evolution of an application that uses one pattern variant into one that uses another one cannot be achieved at all. In others, it requires duplicating parts of the aspect implementatio...

Günter Kniesel, Tobias Rho, Stefan Hanenberg

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