ClassTrim is a framework to recommend move method refactoring using Non-dominated Sorting Genetic Algorithm-III ( NSGA-III) to minimizing the number of classes that exceed predefined metric thresholds.

1. Prerequisites

• JDK 17+
• Maven 3.8+

2. Configure environment

• Copy src/main/resources/config.properties.example to src/main/resources/config.properties.
• Edit the new config.properties and set values for your environment:
  • mavenRepo: absolute path to your local Maven repository
  • datasetRoot: absolute path to the datasets root folder
  • outputFolder: output folder for results (optional; default output)
  • projectCacheFolder: folder for serialized project cache (optional; default .project)
  • notifyUrl: optional webhook for notifications

3. Entry point
   • org.classtrim.Main run the move method refactoring algorithm on each project.
   • org.classtrim.NSGAII or org.classtrim.NSGAIII run it once.
   • org.classtrim.baseline.BaselineRefactor run baseline comparison experiment.

How I calculate metrics and some common question are in wiki.

This folder contains results from baseline tools for comparison, including:

• Runtime screenshots produced during baseline runs
• Suggested outputs generated by each baseline tool (e.g., *.tsv summaries)

Typical subfolders include JDeodorant/, JMove/, HMove/ and REsolution/, each organized by project-version. These provide reference suggestions and artifacts to compare against this project's NSGA-based refactoring outputs.

1. Follow unix philosophy.
2. Uses Lombok to simplify data classes (getters/setters, constructors)
3. Uses Java 8 Optional to handle nulls elegantly
4. Emphasizes immutability; returns unmodified collections
5. Caches computed objects to improve performance
6. Keeps dependencies minimal
7. Automatically records experiment results and summaries (summary may be improved by using a database)
8. Includes unit tests

• ASM
• JMetal

MIT