public Map<String, Set<String>> getMapping() {
        return mapping;
    }

    @Override
    public void started(TaskEvent e) {
        JavaFileObject sourceFile = e.getSourceFile();
        if (isSourceFile(sourceFile)) {
            File asSourceFile = new File(sourceFile.getName());
            if (isClassGenerationPhase(e)) {
                processSourceFile(e, asSourceFile);