Ggthjy

I have a settings.txt file with the following format:

property=value

another_property=value



category.sub_category.property_name=value

And a Settings class that reads the properties out of this file and uses reflection to assign values to the appropriate fields within the class and it's subclasses:

public final class Settings {

    private Settings(){}



    public static void loadSettingsFile(){



        String dir = System.getProperty("user.dir") + "/settings.txt";

        try {

            List<String> lines = Files.readAllLines(Paths.get(dir));

            for(String str : lines){

                String[] property = str.split("=");

                if(property.length == 2)

                    setProperty(property[0], property[1]);

            }

        } catch (Exception e) {

            System.out.println("Settings file not found");

        }

    }



    public static void setProperty(String name, String value){

        try {

            @SuppressWarnings("rawtypes")

            Class target = Settings.class;

            int lastDot = name.lastIndexOf('.');



            if(lastDot != -1){



                String classPath = Settings.class.getPackage().getName();

                classPath += ".Settings$" + name.substring(0, lastDot).replace('.', '$');



                target = Class.forName(classPath);

                name = name.substring(lastDot + 1);

            }



            Field property = target.getField(name);



            switch (property.getType().getName()) {

            case "boolean":

                property.set(null, value.equals("true"));

                break;

            case "int":

                property.set(null, Integer.parseInt(value));

                break;

            case "double":

                property.set(null, Double.parseDouble(value));

                break;



            default:

                System.out.println("Could not set property '" + name + "' - unsupported field type: " + property.getType().getName());

                return;

            }



        } catch (NoSuchFieldException | ClassNotFoundException e) {

            System.out.println("Can't find or access property: " + name);

        } catch (IllegalAccessException | SecurityException e) {

            System.out.println("Can't set property '" + name + "' to " + value);

            e.printStackTrace();

        } catch (Exception e) {

            System.out.println("Can't set property '" + name + "' to " + value);

        }

    }













    /*------------------------------

       settings fields start here

    ------------------------------*/



    public static String mode = "training AI";



    public static class map{

        private map(){}



        public static int width = 35;

        public static int height = 30;

        public static boolean generate_random_walls = false;

        public static int random_walls_count = 10;

    }



    public static class training{

        private training(){}



        public static String algorithm = "genetic";

        public static String custom_ann_file = "default.ann";



        public static boolean override_ann_file_settings = false;

        public static String sensory_input = "basic";

        public static int smell_precision = 1;

        public static boolean interfering_outputs = false;



        // more settings...

    }



    // more subclasses containing settings...

}

I find it convenient to be able to access these settings OOP style from anywhere in my program, I prefer it over a Settings.get(String name) solution because that way the IDE shows me what settings there are so I don't have to remember all their names.

Are there any disadvantages to this solution?

Also I'm not sure about the naming convention, should I make the setProperty(...) method convert property names to match normal Java naming convention or is it ok to have the settings names match the settings file naming convention?

category.sub_category.property_name

convert name to:

Settings.Category.SubCategory.propertyName