Aspects modification in business logic of compiled Java programs

We propose aspect modification of compiled Java programs for which source code and documentation is not available. Aspect oriented programming is used to trace the program execution and identify points, in which aspects implementing new functionalities may be applied. A special tool supporting this approach was designed and implemented. A modification in business logic of an real, compiled program without source code and documentation is presented in this paper. Advantages and disadvantages of described concepts are pointed out.