Feat: Automatic Language Detection for JPlag CLI

[KaitongQin]

Automatic Language Detection for JPlag CLI

Backgroud

When using JPlag for similarity detection, users often forget to specify the target language using the -l option. Previously, this would result in incorrect language assumptions or require setting a default language, which could lead to inaccurate analysis or even failure. This pull request addresses this usability issue by introducing a mechanism to automatically detect the programming language(s) used in the input directory based on file suffixes.

Summary of Changes

• Added a new utility class LanguageChecker, which scans the root input directory recursively to collect file suffixes.
• If the user provides an option (-l), the tool checks whether all file suffixes in the directory are valid for that language.
  • If yes, it proceeds with the user-specified language.
  • If no, it warns the user and attempts to detect a better matching language automatically.
• If no exact match is found or multiple possible matches exist:
  • The user is advised to use the multi-language mode for handling multiple languages.
• Languages are loaded from the class LanguageLoader

[tsaglam]

Hey, thanks for your contribution. This might be very similar to #2087, which introduced the multi-language module. Right now, this module relies on specifying the languages, but we are in the process of adapting that to automatically choose the language for each parsed file individually, see #2304. Maybe you can weigh in on the differences compared to your solution. Also, note that you committed binary files in this PR branch.

[sonarqubecloud]

Quality Gate passed for 'JPlag Plagiarism Detector'

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud