gistfile1.java

public class ConfigHandler {

    private Collection<Class<?>> registeredClasses;
    private ConfigCollection<? extends Annotation> configCollection;

    public ConfigHandler() {
        registeredClasses = new LinkedHashSet<>();
        configCollection = new ConfigCollection<>();

        configCollection.registerAnnotations(Config.VALID_CONFIG_ANNOTATIONS);
    }

    public boolean register(Class<?> clazz) {
        if (!registeredClasses.contains(clazz))
            registeredClasses.add(clazz);
        return registeredClasses.contains(clazz);
    }

    public boolean unregister(Class<?> clazz) {
        if (registeredClasses.contains(clazz))
            registeredClasses.remove(clazz);
        return !registeredClasses.contains(clazz);
    }

    public void initialiseFields() {
        for (Class<?> clazz : registeredClasses)
            for (Field field : clazz.getDeclaredFields())
                processAnnotations(field);
    }

    public void readFrom(File file) {
        Configuration config = new Configuration(file);
        config.load();

        Collection<ConfigInteger> annotations = configCollection.getAnnotationCollection(ConfigInteger.class);

        CoreProperties.logger.info("ConfigInteger size: " + annotations.size());

        config.save();
    }

    private void processAnnotations(Field field) {
        Class[] validConfigAnnotations = Config.VALID_CONFIG_ANNOTATIONS;
        for (int i = 0; i < validConfigAnnotations.length; i++) {
            Class<? extends Annotation> clazz = validConfigAnnotations[i];
            if (field.isAnnotationPresent(clazz)){
                configCollection.add(clazz.cast(field.getAnnotation(clazz)));
            }
        }
    }
}