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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(More)
SUMMARY Previous taxonomies of software change have focused on the purpose of the change (i.e. the why) rather than the underlying mechanisms. This paper proposes a taxonomy of software change based on characterizing the mechanisms of change and the factors that influence these mechanisms. The ultimate goal of this taxonomy is to provide a framework that(More)
The number of possible refactorings is unlimited, so no tool vendor will ever be able to provide custom refactorings for all specific user needs. Therefore, we propose a new kind of refactoring tools, which allow users to create, edit and and compose required refactorings just like any other documents. The heart of such a refactoring editor is the ability(More)
Current proposals for load-time transformation of Java classes are either dependent on the use of a specific class loader or dependent on a specific JVM implementation. This is not due to an inadequacy of the Java platform but to the wrong choice of the level at which to hook into the Java Class Loader Architecture. JMangler follows a novel approach that(More)
In this paper we evaluate logic code analysis and transformation frameworks for their suitability as basic infrastructures for fast detection and extraction of (crosscutting) concerns. Using design patterns as example concerns, we identify desirable properties that an infrastructure should fulfill. We then report our initial results of evaluating candidate(More)
Jointly deployed aspects may interact with each other. While some interactions might be intended, unintended interactions (interferences) can break a program. Detecting and resolving interferences is particularly hard if aspects are developed independently, without knowledge of each other. Work on interference detection has focused so far on the correctness(More)