Syntax-based Improvements to Plagiarism Detectors and their Evaluations

This repository contains the implementation of our plagiarism detection tool.

Dependencies

• Java 8+
• Scala 2.12.0+
• SBT 0.13.13+
• Check build.sbt for dependencies fetched by SBT
• Check project/assembly.sbt for used SBT plugins

How to Build

You can run sbt assembly to get an executable CLI program immediately. If build fails, you can stage the build as follows to figure out where the problem is:

1. Run sbt clean to fetch the dependencies.
2. Run sbt compile to compile the code.
3. Run sbt assembly to create an executable at target/scala-2.12/fett

How to run

We assume that the current working directory set to the root directory of this repository.

Running our method on the tests from the paper:

target/scala-2.12/fett -s smith-waterman -g file -X similarity=classBased matchScore=1 gapScore=-2 classFile=src/main/resources/new.json -c ~/Downloads/results.csv -j6 allpairs src/test/resources/plagiarism-detection/generated/java/*.java;

Running Zhang et al.'s method on the tests from the paper:

target/scala-2.12/fett -s zhang13-smith-waterman -g file -X matchScore=1 gapScore=-1 -j6 -c ~/Downloads/results.csv allpairs src/test/resources/plagiarism-detection/generated/java/*.java;

It will compute similarity scores for each pair, and save those results in ~/Downloads/results.csv.

Project structure

• build.sbt and project/: SBT configurations
• lib: binary dependencies
• src/main/scala
  • main.scala: Entry point of the program
  • sexp.scala: S-expressions
  • scoring: Scoring algorithms
  • util: Utility functions