Frohner, Ákos

Porkoláb, Zoltán

Varga, László

Frohner Ákos

Porkoláb Zoltán

Varga László

University of Szeged

Code Generation from UML models 4Ákos Frohner, Zoltán Porkoláb and Dr. László VargaCreating a generic, object-oriented, component-based, transactional business system, which cov-ers the whole lifecycle, is possible only with integration of commercial tools, component technolo-gies, newly developed class libraries and using code generators. Most of the recently used tools fordevelopment techniques are focusing only of one the layers of the model from the code generationpoint of view. As a consequence the inter-layer connections are lost in the generated code.In this article we describe a code generator technique, which uses a UML model as a startingpoint and generates the following layers directly:	 Presentation layer (clients), which provides the user interface.	 Business logic layer. This can be a physically and geographically distributed N-tier architec-ture:– Business objects: correspondents of business entities. They implement the basic be-haviour of the entities including persistency.– Business processes: a series of operations on the business objects.	 Storage layer: either relational or object-oriented databases, special storage systems and legacysystems.Meanwhile generating the code it preserves the original inter- layer relationships originated in themodel.Based on the experiences with 4GL systems it is obvious the need to provide customisation in thegenerated code. We offer a multi-paradigm approach [1] to let the developer to choose the appropriatesolution for her or his implementation:	 Polymorph code sections: the calling part requests a general behaviour, the called code sectionsubstitutes a specialised version according to the context. [2]	 Run-time parameterisation of the generated code: the calling part requests a specialised be-haviour using a metadata parameter in the routine call.	 Aspect weaving: the modifications (new aspects) of the code are placed in a separated sourcefile, which is woven into the generated code before the compilation. [3]References[1] Jim Coplien: Multi Paradigm Design for C++, 1998, Addison- Wesley, ISBN: 0-201-82467-1[2] Barbara Liskov: Data Abstraction and Hierarchy, SIGPLAN Notices 23, 5. May 1988[3] Gregor Kiczales: Aspect Oriented Programming, AOP Computing surveys 28(es), 1996 p.1544This work has been supported by the Grants OMFB ALK-00229/9833

Code generation from UML models : [abstract]

http://acta.bibl.u-szeged.hu/59587/1/cscs_2000_033.pdf

Code generation from UML models

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