sbool isPersistableClass(Class c) {
  if (isPrimitive(c)) true;
  if (isAnonymousClassName(c.getName())) false;
  if (isBoxedType(c)) true;
  if (isArrayClas(c)) true;
  
  if (hasThisDollarFields(c))
    ret hasSingleArgumentConstructor(c);
  else
    ret getDefaultConstructor(c) != null;
}