Lajos Jeno Fulop

• PhD
• Head of Department at ELI-HU Research and Development Non-Profit

Most of the software maintenance costs come from usability bugs reported after the release and deployment. A usability bug is really subjective, hence there is a large communication overhead between the end user and the developer. Moreover, the reputation of the software development company could be decreased as well. Therefore, proactively testing...

Complex Event Processing deals with the detection of complex events based on rules and patterns defined by domain experts. Many complex events require real-time detection in order to have enough time for appropriate reactions. However, there are several events (e.g. credit card fraud) that should be prevented proactively be-fore they occur, not jus...

Software Quality Assurance involves all stages of the software life cycle including development, operation and evolution as well. Low level measurements (product and process metrics) are used to predict and control higher level quality attributes. There exists a large body of proposed metrics, but their interpretation and the way of connecting them...

For Complex Event Processing (CEP), the synergy with Predictive Analytics (PA) is a promising research direction. In this paper we focus on the inclusion of PA technologies into CEP applications. Involving PA opens a wide range of possibilities in several application fields. However, we have observed that only a few CEP solutions apply PA technique...

Observing failures and other – desired or undesired – behavior patterns in large scale software systems of specific domains (telecommunication systems, information systems, online web applications, etc.) is difficult. Very often, it is only possible by examining the runtime behavior of these systems through operational logs or traces. However, thes...

Having an up-to-date knowledge of the architecture of a software system is of primary importance, since it affects every aspect of software development. It aids under-standing the system, helps defining high level conditions and constraints for making decisions, supports dependency analysis, logical grouping of components, evaluation of high level...

The research field of change impact analysis plays an important role in software engineering theory and practice nowadays. Not only because it has many scientific challenges, but it has many industrial applications too (e.g., cost estimation, test optimization), and the current techniques are still not ready to fulfill the requirements of industry....

Tools for design pattern detection (DPD) can ease program comprehension, helping programmers understand the design and intention of certain parts of a system's implementation. Many tools have been proposed in the past. However, the many different output formats used by the tools make it difficult to compare their results and to improve their accura...

The availability of up-to-date documentation of the architecture is crucial for software maintenance tasks, but it is often missing or differs from the implemented architecture. An increasingly popular and feasible way to get a clear picture of the architecture is to reconstruct it from the source code. The result of the reconstruction procedure is...

Several tools are published in the literature which are able to mine design pattern usage from source code. Because a common test database – a benchmark – is not available, the accuracy of the tools is difficult to check and measuring any kind of improvements on the tools is also problematic. As an all-in-one solution we have developed a benchmark...

In this paper we present work in progress towards implementing a benchmark called BEFRIEND (benchmark for reverse engineering tools working on source code), with which the outputs of reverse engineering tools can be evaluated and compared easily and efficiently. Such tools are e.g. design pattern miners, duplicated code detectors and coding rule vi...

Recovering design pattern usage in source code is a very difficult task. Several tools are described in the literature for this purpose, but there is little work invested in evaluating them. The main reason for this is the lack of an approved benchmark for these tools. In this paper we present work in progress towards creating a benchmark, called D...

Reverse engineering tools analyze the source code of a software system and produce various results, which usually point back to the original source code. Such tools are e.g. design pattern miners, duplicated code detectors and coding rule violation checkers. Most of the time these tools present their results in different formats, which makes them v...

Many articles and tools have been proposed over the years for mining design patterns from source code. These tools differ in several aspects, thus their fair comparison is hard. Besides the basic methodology, the main differences are that the tools operate on different representations of the subject system and that the pattern definitions differ as...

Design patterns present good solutions to frequently occurring problems in object-oriented software design. Thus their correct application in a system's design may significantly improve its internal quality attributes such as reusability and maintainability. In software maintenance the existence of up-to-date documentation is crucial, so the discov...