import java.io.IOException;

        try (StandardJavaFileManager fileManager = compiler.getStandardFileManager(null, null, null)) {

            SmartFileManager smartFileManager = new SmartFileManager(fileManager);

            Context context = new Context();

            // Now setup the actual compilation....

            CompilationResult compilationResult = new CompilationResult(0);

            // First deal with explicit source files on cmdline and in at file.

            ListBuffer<JavaFileObject> compilationUnits = new ListBuffer<>();

            for (JavaFileObject i : fileManager.getJavaFileObjectsFromFiles(explicitSources)) {

                compilationUnits.append(i);

            }

            // Now deal with sources supplied as source_to_compile.

            ListBuffer<File> sourcesToCompileFiles = new ListBuffer<>();

            for (URI u : sourcesToCompile) {

                sourcesToCompileFiles.append(new File(u));

            }

            for (JavaFileObject i : fileManager.getJavaFileObjectsFromFiles(sourcesToCompileFiles)) {

                compilationUnits.append(i);

            }

            // Create a new logger.

            StringWriter stdoutLog = new StringWriter();

            StringWriter stderrLog = new StringWriter();

            PrintWriter stdout = new PrintWriter(stdoutLog);

            PrintWriter stderr = new PrintWriter(stderrLog);

            com.sun.tools.javac.main.Main.Result rc = com.sun.tools.javac.main.Main.Result.OK;

            DependencyCollector depsCollector = new DependencyCollector();

            PublicApiCollector pubApiCollector = new PublicApiCollector();

            PathAndPackageVerifier papVerifier = new PathAndPackageVerifier();

            try {

                if (compilationUnits.size() > 0) {

                    smartFileManager.setVisibleSources(visibleSources);

                    smartFileManager.cleanArtifacts();

                    smartFileManager.setLog(stdout);

                    // Do the compilation!

                    JavacTaskImpl task =

                            (JavacTaskImpl) compiler.getTask(stderr,

                                                             smartFileManager,

                                                             null,

                                                             Arrays.asList(args),

                                                             null,

                                                             compilationUnits,

                                                             context);

                    smartFileManager.setSymbolFileEnabled(!Options.instance(context).isSet("ignore.symbol.file"));

                    task.addTaskListener(depsCollector);

                    task.addTaskListener(pubApiCollector);

                    task.addTaskListener(papVerifier);

                    rc = task.doCall();

                    smartFileManager.flush();

                }

            } catch (Exception e) {

                stderrLog.append(Util.getStackTrace(e));

                rc = com.sun.tools.javac.main.Main.Result.ERROR;

            compilationResult.packageArtifacts = smartFileManager.getPackageArtifacts();

            Dependencies deps = Dependencies.instance(context);

            for (PackageSymbol from : depsCollector.getSourcePackages()) {

                for (PackageSymbol to : depsCollector.getDependenciesForPkg(from))

                    deps.collect(from.fullname, to.fullname);

            }

            for (ClassSymbol cs : pubApiCollector.getClassSymbols())

                deps.visitPubapi(cs);

            if (papVerifier.getMisplacedCompilationUnits().size() > 0) {

                for (CompilationUnitTree cu : papVerifier.getMisplacedCompilationUnits()) {

                    System.err.println("Misplaced compilation unit.");

                    System.err.println("    Directory: " + Paths.get(cu.getSourceFile().toUri()).getParent());

                    System.err.println("    Package:   " + cu.getPackageName());

                }

                rc = com.sun.tools.javac.main.Main.Result.ERROR;

            compilationResult.packageDependencies = deps.getDependencies();

            compilationResult.packagePubapis = deps.getPubapis();

            compilationResult.stdout = stdoutLog.toString();

            compilationResult.stderr = stderrLog.toString();

            compilationResult.returnCode = rc.exitCode;

            return compilationResult;

        } catch (IOException e) {

            throw new Error(e);