Dirk Reiß

Carsten Kolassa, Markus Look, Klaus Müller et al.

Template-based code generator development as part of model-drivendevelopment (MDD) demands for strong mechanisms and tools that support developers to improve robustness, i.e., the desired code is generated for the specified inputs. Although different testing methods have been proposed,a method for testing only parts of template-based code generators that can be employed in the early stage of development is lacking. Thus, in this paper we present an approach and an implementation based on JUnit to test template-based code generators. Rather than testing a complete code generator,it facilitates partial testing by supporting the execution of templates with a mocked environment. This eases testing of code generators in early stages of development as well as testing new orchanged parts of a code generator. To test the source code generated by the templates under test, different methods are presented including string comparisons, API-based assertions, and abstract syntax tree based assertions.

Timo Greifenberg, Katrin Hölldobler, Carsten Kolassa et al.

Code generation from models is a core activity in model-driven development (MDD). For complex systems it is usually impossible to generate the entire software system from models alone. Thus, MDD requires mechanisms for integrating generated and handwritten code. Applying such mechanisms without considering their effects can cause issues in projects with many model and code artifacts, where a sound integration for generated and handwritten code is necessary. We provide an overview of mechanisms for integrating generated and handwritten code for object-oriented languages. In addition to that, we define and apply criteria to compare these mechanisms. The results are intended to help MDD tool developers in choosing an appropriate integration mechanism.

Dirk Reiß, Bernhard Rumpe, Marvin Schulze-Quester et al.

The Bologna Process has triggered a major restructuring of the current university diploma into a bachelor/master system. As one effect, the administration effort for the new system has increased dramatically. As a second effect, students need and demand a much better information policy, given the new possibilities of the internet. Both to increase efficiency of the university's administration and to provide students as well as lecturers with modern e government services, it is inevitable to evolve the current IT-infrastructure of a university into a modern web-based landscape of systems that support business processes on campus. In this paper, we describe the approach taken at the Braunschweig University of Technology to evolve the existing landscape of legacy systems by adding bridges between previously unrelated parts, adding and customizing unused modules of existing software to bring information and services online and to develop new software, where old modules could not serve the necessary purposes. Most of all, both implementation of the results in university's business processes and the resulting quick feedback and wishes for feature enhancement are seen as part of the software development processes and discussed in this paper.

Michael Dukaczewski, Dirk Reiss, Mark Stein et al.

The development process of web information systems is often tedious, error prone and usually involves redundant steps of work. Therefore, it is rather e_x000E_fficient to employ a modeldriven approach for the systematic aspects that comprise such a system. This involves models for the data structure that shall be handled by the system (here: class diagrams), various editable and read-only presentations (views) on combinations and extractions of the underlying data (here: a special view language) and ways to connect these views and define data flow between them (here: activity diagrams). In this paper, we present the MontiWeb approach to model and generate these aspects in a modular manner by incorperating the MontiCore framework. Therefor we shortly introduce the infrastructure that helps to develop modular systems. This involves the whole development process from defining the modeling languages to final code generation as well as all steps in between. We present the text-based class and activity diagram languages as well as a view language that are used to model our system.

Hans Grönninger, Dirk Reiß, Bernhard Rumpe

UML activity diagrams have become an established notation to model control and data ow on various levels of abstraction, ranging from fine-grained descriptions of algorithms to high-level workflow models in business applications. A formal semantics has to capture the flexibility of the interpretation of activity diagrams in real systems, which makes it inappropriate to define a fixed formal semantics. In this paper, we define a semantics with semantic variation points that allow for a customizable, application-specific interpretation of activity diagrams. We examine concrete variants of the activity diagram semantics which may also entail variants of the syntax re ecting the intended use at hand.

Dirk Reiß, Bernhard Rumpe

The development process of web information systems nowadays improved a lot regarding effectiveness and tool support, but still contains many redundant steps for similar tasks. In order to overcome this, we use a model-driven approach to specify a web information system in an agile way and generate a full- edged and runnable application from a set of models. The covered aspects of the system comprise data structure, page structure including view on data, page- and workflow within the system as well as overall application structure and user rights management. Appropriate tooling allows transforming these models to complete systems and thus gives us opportunity for a lightweight development process based on models. In this paper, we describe how we approach the page- and workflow aspect by using activity diagrams as part of the agile modeling approach MontiWIS. We give an overview of the defined syntax, describe the supported forms of action contents and finally explain how the behavior is realized in the generated application.