public Enum read (Kryo kryo, Input input, Class<Enum> type) {
int ordinal = input.readInt(true);
if (ordinal == NULL) return null;
ordinal--;
if (ordinal < 0 || ordinal > enumConstants.length - 1)
throw new KryoException("Invalid ordinal for enum \"" + type.getName() + "\": " + ordinal);
Object constant = enumConstants[ordinal];
return (Enum)constant;
}