Abstract Features Legal Description Technology History Future Development Credits No Warranty

more screenshots

jrexx-Lab is a rich visualization and graphical editor for regular expressions.

With jrexx-Lab you can qickly create, edit, analyze and test regular expressions.

• creation and editing of jrexx regular expressions
• graphical representation of regular expressions as finite state automaton graphs
• testing environment for checking stepwise processing of input strings
• set operations on regular expressions (unify, intersect, substract, complement)
• minimizing of automatons
• interactive layout manipulation of the automaton graph (move, scroll, zoom)
• usage of simple 'relax' alogrithm to untangle the automaton graph
• printing
• load and save
• jrexx-Lab is implemented in 100% pure Java and runs on any plattform providing a Java Runtime Environment (JRE) version 1.3.x

jrexx-Lab is published under a BSD-like License and therefore is freely distributeable as long as you include the readme file and keep the licensing conditions of it's modules. The jrexx-Lab Application makes use of the following modules:

• jrexx
• EditorFramework
• JAZZ

jrexx-Lab is a GUI frontend to the jrexx - automaton based regular expression API for Java. You can create, edit, analyse and test regular expressions. Since jrexx handles regular expressions as finite state automatons, jrexx-Lab does present them graphically as typical networks of states and transitions. jrexx handles regular expressions as sets of character strings. All basic set operations (unify, intersect, substract and complement) are available from the GUI also.

jrexx-Lab is implemented in 100% pure Java by Michael Karneim and is based on the jrexx - automaton based regular expression API for Java by Ralf Meyer.

jrexx-Lab was created in my spare time during 3 months since September 2002 after I have finished the last customer project and had some time off to do some interesting stuff. The idea was fairly old and came first into Ralf's (the author of jrexx) mind when we were building a home banking client that could read and write HBCI and SWIFT messages.
Since the SWIFT format and all it's clones are fairly ugly to parse, he decided to write a non-deterministic parser that can deal ambigous format definitions based on regular expressions. Later during our work we realized, that it wouldn't be a handicap to have also a tool for testing SWIFT regular expressions. And even not worse would it be if we could do these tests while seeing the expressions as a finite state automaton diagram. So here is it!

With jrexx-Lab you can do all this!

Since we think that there migth be some other people around that have similar wishes, we contribute the result to the net.
If you find it usefull, we would be happy to hear about it, and of course, when you find bugs or you have some really neat feature requests.

• SVG Export of the automaton graph
• interactive manipulation of the automaton through java code evaluation
• adding and removing states and transitions from the GUI

• jrexx-Lab - Laboratory for regular expression analysis
    Author: Michael Karneim
  
  

• jrexx - automaton based regular expression API for Java
    Author: Ralf Meyer
  
  
• EditorFramework - java beans library and IDE plugins for building rich Java Swing applications
    Authors: Richard Karneim, Michael Karneim, Ralf Meyer
  
  
• JAZZ - api for 2d grapics tree manipulation
    Version: 1.2
    Authors: Jazz Development Team led by by Professor Ben Bederson,
    University of Maryland.
    License: Mozilla Public License