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Walkmod plugin to support the Java 8 programming language. It contains helper visitors, a walker and a basic code writer.

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package org.walkmod.javalang.walkers;

import java.io.File;

import org.walkmod.javalang.ast.CompilationUnit;
import org.walkmod.javalang.ast.PackageDeclaration;
import org.walkmod.javalang.ast.expr.NameExpr;

public class JavaSourceUtils {

    public static String getSourceDirs(String rootDir, File file, CompilationUnit cu) throws Exception {
        String readerFile = new File(rootDir).getCanonicalPath();
        if (!readerFile.endsWith(File.separator)) {
            readerFile += File.separator;
        }

        String path = file.getCanonicalPath();
        String cuPath = getRelativePath(file, cu);

        int srcIndex = path.indexOf(cuPath);
        return path.substring(readerFile.length(), srcIndex);
    }

    public static String getRelativePath(File file, CompilationUnit cu) throws Exception {
      
        String cuPath = "";

        PackageDeclaration pd = cu.getPackage();

        if (pd != null) {
            NameExpr packageName = pd.getName();
            String packPath = packageName.toString().replace('.', File.separatorChar);
            cuPath = packPath + File.separator + file.getName();
        } else {
            cuPath = file.getName();
        }
        return cuPath;
    }

}