Create Framework for raw data or Binary read and write

Question

I am working on one project in which data has to read in binary format but one can put into a structure format. In java Structure is not available. I have send the data in byte array. It also has some structure.

For Example

Packet

int length 
int sequence no
MessageData

MessageData MessageHeader MessageBody

MessageHeader int data1 long data2 char[] data3//2bytes char[] data4//3 bytes

Same for MessageBody

But data should be packed in byte array.

One can do in CPP as

#pragma(2) //for word alignment

struct Packet{
    int length 
    int sequence no
    MessageData msgdata

}

I have to implement in java.

for reading data I am using Preon library

But for writing data I am still using normal method for packaging data in byte array with help of some function Anybody have work on same kind project or have better idea

If you are reading using the Preon library, I suggest you write using it as well. Otherwise you need to know how it expects your data to be structured. My guess is you intend to use a byte[] for the text rather than a char[] (char is 16-bit in Java) — Peter Lawrey, Jan 05 '11 at 09:14
Yes, it is in byte[]. I don't know how write using Preon lib. If you have code then please post it. I didn't find any help or documentation on net. — Kamahire, Jan 05 '11 at 09:17

score 0 · Answer 1 · answered Jan 26 '11 at 18:01

The current codebase does contain some bytes for writing data, however, it's not completed yet. Having said that, it might work for your current case:

Codec<Packet> codec = Codecs.create(Packet.class);
Packet packet = ...;
OutputStream out = ...;
codecs.encode(packet, codec, out);

Create Framework for raw data or Binary read and write

1 Answers1