Browsing by Author "Nowakowski, Wiktor"

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Access status: Open Access ,
Recovery and migration of application logic from legacy systems
(Wydawnictwa AGH, 2012) Nowakowski, Wiktor; Śmiałek, Michał; Ambroziewicz, Albert; Jarzębowski, Norbert; Straszak, Tomasz
Future Internet technologies necessitate dramatic changes in system design, delivery and usage patterns. For many legacy applications it means that their further development and transition to the Internet becomes problematic or even impossible due to the obsolescence of technologies they use. Replacement of the old system with the new one, built from scratch, is usually economically unacceptable. Therefore, there is a call for methods and tools supporting the automated migration of legacy systems into a new paradigm. This paper proposes a tool supported method for recovery and migration of application logic information from legacy systems. The information extracted from a legacy application is stored in the form of precise requirement-level models enabling automated transformation into a new system structure in a model-driven way. Evaluation of the approach is based on a case study legacy system.
Access status: Open Access ,
Translation of use case scenarios to Java code
(Wydawnictwa AGH, 2012) Śmiałek, Michał; Jarzębowski, Norbert; Nowakowski, Wiktor
Use cases are usually treated as second class citizens in the software development chain based on models. Their textual descriptions (scenarios) are treated as informal input to more formal design models that can then be (semi-)automatically transformed down to code. In this paper we will show that use case scenarios can gain precise metamodel-based notation and semantics enabling automatic processing. What is more, we will show transformation algorithms that can transform use case scenarios directly to dynamic code in Java. The presented transformation can generate the full structure of the system following the MVP architectural pattern, including complete method contents for the application logic (Presenter) and presentation (View) layers. It also provides a code skeleton for the domain logic (Model) layer. The use case notation and the transformation were implemented within a sophisticated tool suite. Based on this, the paper discusses the evaluation efforts based on a case study.