package org.moparscape.msc.ls.codec;
import java.net.URLEncoder;
import org.apache.mina.common.ByteBuffer;
import org.apache.mina.common.IoSession;
import org.apache.mina.filter.codec.ProtocolEncoder;
import org.apache.mina.filter.codec.ProtocolEncoderOutput;
import org.moparscape.msc.ls.Server;
import org.moparscape.msc.ls.net.FPacket;
/**
* Encodes the high level <code>FPacket</code> class into the proper protocol
* data required for transmission.
*/
public class FProtocolEncoder implements ProtocolEncoder {
/**
* Releases all resources used by this encoder.
*
* @param session
* The IO session
*/
public void dispose(IoSession session) {
}
/**
* Converts a <code>FPacket</code> object into the raw data needed for
* transmission.
*
* @param session
* The IO session associated with the packet
* @param message
* A <code>FPacket</code> to encode
* @param out
* The output stream to which to write the data
*/
public void encode(IoSession session, Object message,
ProtocolEncoderOutput out) {
if (!(message instanceof FPacket)) {
Server.error(new Exception("Wrong packet type! "
+ message.toString()));
return;
}
FPacket p = (FPacket) message;
try {
String s = String.valueOf(p.getID());
if (p.countParameters() > 0) {
for (String param : p.getParameters()) {
s += " " + URLEncoder.encode(param, "UTF-8");
}
}
byte[] data = s.getBytes();
ByteBuffer buffer = ByteBuffer.allocate(data.length);
buffer.put(data, 0, data.length);
buffer.flip();
out.write(buffer);
} catch (Exception e) {
Server.error(e);
}
}
}