Main.java

import com.github.javaparser.StaticJavaParser;
import com.github.javaparser.ast.CompilationUnit;
import com.github.javaparser.ast.expr.MethodCallExpr;
import com.github.javaparser.ast.visitor.ModifierVisitor;
import com.github.javaparser.ast.visitor.Visitable;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.PrintWriter;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;

public class Main {

	static Set<String> logMethods = new HashSet<>();
	static Set<String> logClasses = new HashSet<>();

	static Set<String> combinations = new HashSet<>();

	static {
		logMethods.add("info");
		logMethods.add("debug");
		logMethods.add("warn");
		logMethods.add("error");
		logMethods.add("fatal");
		logMethods.add("trace");

		logClasses.add("log");

		for(String methods : logMethods) {
			for(String classes : logClasses) {
				combinations.add(classes + "." + methods);
			}
		}

	}

	public static void main(String[] args) throws IOException {

		// careful: it's gonna overwrite the files!
		String dir = "/Users/mauricioaniche/workspace/logremoval/fixture";

		List<Path> javaFiles = Files.walk(Paths.get(dir))
				.filter(Files::isRegularFile)
				.filter(x -> !x.toAbsolutePath().toString().contains(".git"))
				.map(x -> x.toAbsolutePath())
				.collect(Collectors.toList());

		for(Path javaFile : javaFiles) {

			try {
				CompilationUnit cu = StaticJavaParser.parse(new FileInputStream(javaFile.toString()));

				cu.accept(new ModifierVisitor<Void>() {

					@Override
					public Visitable visit(final MethodCallExpr n, Void arg) {

						String methodCall = n.toString().trim();
						boolean logCall = combinations.stream().anyMatch(x -> methodCall.startsWith(x));

						if (logCall) {
							n.getParentNode().get().remove();
						}

						return super.visit(n, arg);

					}
				}, null);

				PrintWriter pw = new PrintWriter(new FileOutputStream(javaFile.toString()), false);
				pw.print(cu.toString());
				pw.close();
			} catch (Exception e) {
				System.out.println("fail " + javaFile.toString());
			}
		}


	}
}