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Open Modules: Reconciling Extensibility and Information Hiding

Summary: Open Modules:
Reconciling Extensibility and Information Hiding
Jonathan Aldrich
School of Computer Science
Carnegie Mellon University
5000 Forbes Avenue
Pittsburgh, PA 15213, USA
Aspect-oriented programming systems provide powerful
mechanisms for separating concerns, but understanding
how these concerns interact can be challenging. In partic-
ular, many aspect-oriented programming constructs can vio-
late encapsulation, creating dependencies between concerns
that make software evolution more difficult and error-prone.
In this paper, we introduce Open Modules, a mechanism
for enforcing a strong form of encapsulation while support-
ing much of the extensibility provided by languages like
AspectJ. Open Modules provide extensibility by allowing
clients to advise the interface of a module, but enforce encap-


Source: Aldrich, Jonathan - School of Computer Science, Carnegie Mellon University


Collections: Computer Technologies and Information Sciences