Run queries on your Java code to check if it meets the criteria suggested by the book Effective Java. And some others, soon.

Download the standalone jar from the releases directory. No deps needed, everything is packed inside the jar. Feel free to rename it (effectivejava-0.1.0-SNAPSHOT-standalone.jar is a mouthful...)

Now, suppose you want to know which classes has 5 or more constructor; you can run this command:

java -jar effectivejava-0.1.1-SNAPSHOT-standalone.jar -q mc -d "<myJavaProjectDir>" -t 5

You can expect a similar output:

Considering 109 Java files
japa.parser.ast.expr.ArrayCreationExpr  :  5
japa.parser.ast.body.MethodDeclaration  :  5
japa.parser.ast.body.BaseParameter  :  5
japa.parser.ast.body.FieldDeclaration  :  5

I am just getting started so I implemented only a few queries for now:

• mc=many constructors : find the classes which contain the same number of constructors as the given threshold, or more
• mcp=many constructor parameters : find the constructors which contain the same number of parameters as the given threshold, or more
• st=singleton type: find if a type implements the singleton pattern and distinguish between the three types (public field, static factory, singleton enum)

The project is written in Clojure using a java library called JavaParser. Stricly speaking it is using my fork at this moment, but my chages will be soon getting merged in the main branch.

When my changes will find their way in the main branch I will update project.clj and javaparser will be download from Maven automatically. For the time being, if you want to play with the code you can clone my project and compile it to your local maven repository. Look at the other MD file in this dir, there there are the commands to run to do it.

You will need also Leiningen, the build tool for Clojure. It should download also Clojure for you.

I am reading this book and many advices seem sort of obvious in theory but I guess there are some violations lurking in the large codebase I am working with. I was curious to assess how many violations there were and I needed a way to find them out automatically. And I wanted to learn Clojure. And I had a free sunday. So...

Hope you enjoy this small project of mine. Feel free to open issues and ask questions!