Hereby Certify to Have Made the Available Thesis without Assistance of Third and Only with the Indicated Sources

The development and maintenance of large and long-lived enterprise applications is very complex. These tasks can be significantly simplified using visual programming languages that allow to generate programs by graph specifications for the software design. FUJABA and PROGRES can be mentioned as representatives. Long-lived applications require persistence. Thus, generating code with an integrated persistence mechanism is an important aspect for those visual programming languages. The CASE tool FUJABA uses UML and SDM diagrams for the specification of software systems including static structure and dynamic behaviour modeling. FUJABA generates Java source code from the specifications only for an in-memory object structure. The graph-oriented database management system Dragos has been designed according to the requirements resulting from software engineering applications and allows to store object structures as graphs in graph databases. This master thesis introduces a new approach to persistent programming and presents a framework that provides a graph-oriented persistence layer for source code generated by the FUJABA Tool Suite. FUJABA supplies a visual language to specify attributed graph structures and graph transformations. Dragos is used for storing object structures of the generated code and manages the persistence. For the mapping of Java objects to graph objects, a specialized Dragos graph model is developed. The code generation technique of FUJABA is adapted according to the Dragos reqiurements. As the result of this thesis, FUJABA can generate Java code which uses Dragos for persistency. Source code generated by FUJABA supports transactional executions as well.