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A Semantical Approach to Method-Call Interception

By Ralf Lämmel


We study a language construct superimpose for methodcall interception (MCI). The construct enables a programmer to attach additional functionality to certain join points along the execution of specified method calls. This is done in a completely type-safe manner where the additional functionality shares its state with the registry location. We present the static and the dynamic semantics of MCI. We use a disciplined style of Natural semantics for an accessible specification of MCI. We organize the constructs in a design space so that we can add expressiveness to a simple objectoriented language core in a stepwise fashion. It is one simple extension to enable interactive MCI, that is, MCI code can interact with the objects involved in a method call. Another simple extension is to allow for collective MCI by using patterns for the calls to be intercepted

Year: 2002
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