Several mobile middleware solutions addressing these issues have been proposed. However, they rely on either significant changes in application structure, extensions to the programming language syntax and semantics, domain specific languages, cumbersome development tools, or a combination of the above. The main disadvantages of these approaches are lack of transparency and reduced portability.

In this paper we describe our work on enabling transparent integration between applications and middleware without changing application structure, extending the programming language or otherwise reducing portability. We used the OBIWAN middleware but our solutions are general. To achieve this goal we employ program analysis and transformation techniques for extending application code with hooks for calling middleware services. Application code extension is performed automatically at compile-time by a code extension tool integrated with the development environment tool set. We describe the implementation of our .NET and Java prototypes and discuss evaluation results.