Sheet of mamont. I think it will useless, but I will be able to be wrong

FieldsExtractor

public class FieldsExtractor {

    protected static final Map<Class, List<Field>> classFieldsCache = new HashMap<>();

    public static List<Field> getPublicFields(Class targetClass) {
        List<Field> result = new ArrayList<>();
        if (!classFieldsCache.containsKey(targetClass)) {
            List<Field> fields = new ArrayList<>();
            Class currentValuesTypeClass = targetClass;
            do {
                fields.addAll(Arrays.asList(currentValuesTypeClass.getDeclaredFields()));
                currentValuesTypeClass = currentValuesTypeClass.getSuperclass();
            } while (currentValuesTypeClass != null);
            classFieldsCache.put(targetClass, fields);
        }
        result.addAll(classFieldsCache.get(targetClass));

        for (int i = 0; i < result.size(); i++) {
            Field currentField = result.get(i);
            int modifiers = currentField.getModifiers();
            if (Modifier.isStatic(modifiers) ||
                    currentField.isSynthetic() ||
                    !Modifier.isPublic(modifiers)) {
                result.remove(i);
                i--;
                continue;
            }
            try {
                currentField.getType().getConstructor(String.class);
            } catch (NoSuchMethodException e) {
                throw new IllegalStateException("Can't create isntance", e);
            }
        }
        return result;
    }

}