public class Main {

    public static void main(String[] args) throws IOException {
        File dir = new File("C:/Users/Lucia/Desktop/test");
        HashMap<String, HashMap<String, String>> paramsHash = new HashMap<>();
        for (File file : Objects.requireNonNull(dir.listFiles())) {
            String fileToString = readFile(file.toString());
            String ctorPattern = "(public)(\\s+)((?:[a-z][a-z0-9_]*))(\\(.*\\))";
            Pattern p = Pattern.compile(ctorPattern, Pattern.CASE_INSENSITIVE);
            Matcher m = p.matcher(fileToString);
            if (m.find()) {
                ArrayList<String> paramTypes = new ArrayList<>();
                ArrayList<String> paramNames = new ArrayList<>();
                String ctor = m.group().replaceFirst("public ", "");
                ctor = ctor.replace(",", "");
                ctor = ctor.replace(")", "");
                String[] ctorArr = ctor.split("\\(");
                String className = ctorArr[0];
                String params = ctorArr[1];
                String[] paramsArr = params.split(" ");
                ArrayList<String> paramsArrList = new ArrayList<>(Arrays.asList(paramsArr));
                for (String s : paramsArrList) {
                    if (paramsArrList.indexOf(s) % 2 == 0) {
                        paramTypes.add(s);
                    } else {
                        paramNames.add(s);
                    }
                }
                HashMap<String, String> paramsPairing = new HashMap<>();
                for (String s : paramTypes) {
                    paramsPairing.put(s, paramNames.get(paramTypes.indexOf(s)));
                }
                paramsHash.put(className, paramsPairing);
            }
        }
        JSONObject actionsJSON = new JSONObject();
        for (Map.Entry<String, HashMap<String, String>> e : paramsHash.entrySet()) {
            String key = e.getKey();
            HashMap<String, String> value = e.getValue();
            actionsJSON.put(key, value);
        }
        try (FileWriter file = new FileWriter("C:/Users/Lucia/Desktop/stsmods/STSRegex/test.json")) {
            file.write(actionsJSON.toJSONString());
            System.out.println("Successfully Copied JSON Object to File...");
        }
    }

    private static String readFile(String path) throws IOException {
        byte[] encoded = Files.readAllBytes(Paths.get(path));
        return new String(encoded, StandardCharsets.UTF_8);
    }
}