@Override
    public boolean acceptsURL(String url) throws SQLException {
        if (!App.checkForExistence(url)) {
            throw new SQLException();
        } else if (url.equals("jdbc:xmldb://localhost")) {
            return true;
        } else if (url.equals("jdbc:altdb://localhost")) {
            return true;
        } else {
            return false;
        }
    }



@Override
    public Connection connect(String url, Properties info) throws SQLException {
        try {
            if (!acceptsURL(url)) {
                return null;
            }
        } catch (SQLException e) {
            throw new SQLException();
        }
        String username = info.getProperty("username", null);
        String password = info.getProperty("password", null);
        try {
            if (!canLogIn(username, password)) {
                // return null;
            }
        } catch (Exception e) {
        }
        File appDir = (File) info.get("path");
        try {
            String writerType = url.substring(url.indexOf(':') + 1, url.lastIndexOf(':'));
            if (appDir.exists()) {
                return new eg.edu.alexu.csd.oop.DBMS.plugins.jdbc.Connection(appDir.getPath(),
                        BackEndWriterFactory.getBackEndWriter(writerType));
            }
            appDir.mkdirs();
            return new eg.edu.alexu.csd.oop.DBMS.plugins.jdbc.Connection(appDir.getPath(),
                    BackEndWriterFactory.getBackEndWriter(writerType));
        } catch (Exception e) {
            throw new SQLException();
        }
    }