Code smells are structures in the source code that suggest the possibility of refactorings.
Consequently, developers may identify refactoring opportunities by detecting code smells …

The ability to evolve software rapidly and reliably is a major challenge for software
engineering. In this introductory chapter we start with a historic overview of the research …

Software refactoring is widely employed to improve software quality. A key step in software
refactoring is to identify which part of the software should be refactored. To facilitate the …

Refactoring is a widely accepted technique to improve the structure of object-oriented
software. Nevertheless, existing tool support remains restricted to automatically applying …

Graphs are important structures in mathematics, computer science and several other
research and application areas. The concepts of graph transformation and graph grammars …

Bad smells are signs of potential problems in code. Detecting and resolving bad smells,
however, remain time-consuming for software engineers despite proposals on bad smell …

Refactoring is widely recognized as a crucial technique applied when evolving object‐
oriented software systems. If applied well, refactoring can improve different aspects of …

Abstract Model-driven software engineering promotes the use of models and
transformations as primary artifacts. Several formalisms can be used for the specification of …

During its lifecycle, the internal structure of a software system undergoes continuous
modifications. These changes push away the source code from its original design, often …

Program querying and analysis tools are of growing importance, and occur in two main
variants. Firstly there are source-code query languages which help software engineers to …