Papers and other publications

Revisiting the Delta IC Approach to Component Recovery

Rainer Koschke, Gerardo Canfora, Jörg Czeranski

Science of Computer Programming, Vol. 60, No. 2 (2006)

Abstract

Component recovery supports program understanding, architecture recovery, and re-use. Among the best known techniques for detection of re-usable objects (related global variables and their accessor functions) is Delta-IC (the improvement in internal connectivity). This paper re-visits the original approach and extends it in different ways. It describes a variant of Delta-IC suitable for reverse engineering that omits the slicing step of the original approach. The underlying metric of Delta-IC is extended toward types integrating ideas of the Internal Access technique such that abstract data types can also be detected. Furthermore, the connectivity metric of Delta-IC is combined with a cohesion metric based on vertex connectivity. The new metrics and the new algorithm for reverse engineering are evaluated and compared to other techniques quantitatively. The new contributions of this paper over the conference paper are the analysis of the relation of the connectivity threshold and recall and precision, additional experiments in varying the ICVC (internal connectivity vertex connectivity) factor, and a detailed comparison of the complementarity of the various techniques.

A Product Line Asset Management Tool

Stefan Bellon, Jörg Czeranski, Thomas Eisenbarth, Daniel Simon

Workshop on Software Variability Management, 2004

Abstract

When developing a software product line, software engineers are confronted with the task of configuration and revision management for the product line as a whole. Furthermore, both on domain and product level explicit variation management has to be provided for. While there are partial solutions to these tasks, there is no integrated support for the product line developers.
In this paper we present a tool for the integrated management of software assets for software product line development. We address the problems of configuration and revision management, explicit variation point handling, and the differences in domain and product development. In our approach, the available solutions to specific tasks are integrated to provide a new solution.

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Softwarevisualisierungstool Gravis

(Extended abstract for a demonstration)

Jörg Czeranski, Thomas Eisenbarth, Daniel Simon

Workshop Software-Reengineering, 2002

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Revisiting the Delta IC Approach to Component Recovery

Gerardo Canfora, Jörg Czeranski, Rainer Koschke

Working Conference on Reverse Engineering, 2000

Abstract

Component recovery supports program understanding, architecture recovery, and re-use. Among the best known techniques for detection of re-usable objects (related global variables and their accessor functions) is Delta-IC. This paper re-visits the original approach and extends it in different ways. It describes a variant of Delta-IC suitable for reverse engineering that omits the slicing step of the original approach. The underlying metric of Delta-IC is extended toward types integrating ideas of the Internal Access technique such that abstract data types can also be detected. Furthermore, the connectivity metric of Delta-IC is combined with a cohesion metric based on vertex connectivity. The new metrics and the new algorithm for reverse engineering are quantitatively evaluated using the framework proposed in A Framework for Experimental Evaluation of Clustering Techniques as a standard evaluation of clustering techniques for component recovery.

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Analyzing xfig Using the Bauhaus Tool

Jörg Czeranski, Thomas Eisenbarth, Holger M. Kienle, Rainer Koschke, Daniel Simon

Working Conference on Reverse Engineering, 2000

Abstract

We used the Bauhaus tool, which helps program understanding and architecture recovery, to analyze the xfig program. xfig's architecture was recovered and all of the (hypothetical) maintenance tasks described in the Developer Handbook were performed.

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Data Exchange in Bauhaus

Jörg Czeranski, Thomas Eisenbarth, Holger M. Kienle, Rainer Koschke, Erhard Plödereder, Daniel Simon, Yan Zhang, Jean-François Girard, Martin Würthner

Working Conference on Reverse Engineering, 2000

Abstract

In the context of the Bauhaus project, reengineering environments to support program understanding of legacy code are being developed. Bauhaus defines two formats to represent information that has been extracted from source code. One of these formats, RG, is suitable as an exchange format. This paper introduces RG, describes how it is represented as an exchange format, and discusses schema conversions in RG.

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Exchange Format Bibliography

Holger M. Kienle, Jörg Czeranski, Thomas Eisenbarth

Workshop on Standard Exchange Format, 2000

Abstract

This paper gives a brief bibliographical overview of exchange formats and related research areas. We classify exchange formats and try to give a brief assessment of the more interesting ones.

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The API Perspective of Exchange Formats

Holger M. Kienle, Jörg Czeranski, Thomas Eisenbarth

Workshop on Standard Exchange Format, 2000

Abstract

The discussion about a universal exchange format mainly centers around syntax and semantic issues. This paper focuses on the requirements for the API that sits on top of an exchange format.

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Wiedergewinnung von Architekturinformationen: Ausblicke

Jörg Czeranski, Thomas Eisenbarth, Holger M. Kienle, Rainer Koschke, Daniel Simon

Workshop Software-Reengineering, 2000

Zusammenfassung

Wiedergewinnen von Informationen über die Architektur einer Software ist eine Voraussetzung für viele Tätigkeiten des Reverse-Engineerings. Ein Aspekt der Software-Architektur ist die Aufteilung eines Softwareartefaktes in Komponenten, Konnektoren und Protokolle. Techniken zur halbautomatischen Komponentenerkennung sind inzwischen in vielfältigen Variationen verfügbar. Ziel des Bauhaus-Projektes ist es, eine Software-Architektur aus dem Quelltext eines Softwareartefaktes halbautomatisch abzuleiten. Die nächsten Ziele des Bauhaus-Projektes umfassen unter anderem die Erkennung von Traces und Konnektoren, die Klassifikation von Teilen einer Komponente, sowie die Unterstützung von Software-Prüfungen durch Datenflussanalysen.

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Adaptive Sortierverfahren

Jörg Czeranski

Einsatz kryptographischer Methoden zur Authentisierung

Jörg Czeranski

Netzwerkprogrammierung unter Unix (am Beispiel des Spiels iMaze)

Jörg Czeranski, Hans-Ulrich Kiel