private <T> void encodeOptional(DataOutputStream os, Optional<T> ot, Codec<T> codec)
throws IOException {
if (ot.isPresent()) {
os.writeBoolean(true);
codec.encode(os, ot.get());
} else {
os.writeBoolean(false);
}
}
private <T> Optional<T> decodeOptional(DataInputStream is, Codec<T> codec)
throws IOException {
return is.readBoolean() ? Optional.of(codec.decode(is)) : Optional.empty();
}