Need for Instance Level Aspect Language with Rich Pointcut Language

A potentially important part of the design space for aspect-oriented languages remains largely unexplored: namely that space of languages that combine expressive pointcut languages and instance level aspect weaving. We define instance level aspect weaving as the ability to differentiate between two instances of a class and to weave them differently if needed. Note that instance level aspect weaving and dynamic/run-time aspect weaving are not the same, former allowing the developer to differentiate between instances whereas the later gives him/her the ability to attach and detach aspects at run-time. In summary, instance level aspect weaving allows you to say, “weave this aspect to only these instances of that class”.