code: public static void serializeData(DataOutputStream outputStream, byte[] data) throws IOException {
  
  		outputStream.writeInt(data.length);
  		outputStream.write(data);
  
  		outputStream.flush();
  	}
docs: Serializes the given object into the given writer. The following format will
  be used to serialize objects. The first two characters are the type index, see
  typeMap above. After that, a single digit that indicates the length of the following
  length field follows. After that, the length field is serialized, followed by the
  string value of the given object and a space character for human readability.
  
  @param outputStream
  @param obj