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Nowadays context-aware adaptation is becoming an important feature for pervasive computing applications. In this paper, the authors present JCOOL, a COntext Oriented Language tailored to handle context awareness in Java applications. JCOOL exploits Aspect Oriented techniques so that context changes detection and related adaptations can be considered as two separated crosscutting concerns with respect to the core "Business logic" of new or legacy Java applications. Moreover, mobile and pervasive applications generally rely on middlewares that hide the complexity of the underlying environment. In order to show how JCOOL support can be introduced into middleware based application, in the second part of the paper they also describe JCOOL integration in SMILE, a Middleware Independent Layer developed in the scope of the SMS project.
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