61 lines
1.6 KiB
Java
61 lines
1.6 KiB
Java
package org.moparscape.msc.gs.connection;
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import org.apache.mina.common.ByteBuffer;
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import org.apache.mina.common.IoSession;
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import org.apache.mina.filter.codec.ProtocolEncoder;
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import org.apache.mina.filter.codec.ProtocolEncoderOutput;
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import org.moparscape.msc.gs.util.Logger;
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/**
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* Encodes the high level <code>LSPacket</code> class into the proper protocol
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* data required for transmission.
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*/
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public class LSProtocolEncoder implements ProtocolEncoder {
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/**
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* Releases all resources used by this encoder.
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*
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* @param session
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* The IO session
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*/
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public void dispose(IoSession session) {
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}
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/**
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* Converts a <code>LSPacket</code> object into the raw data needed for
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* transmission.
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*
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* @param session
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* The IO session associated with the packet
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* @param message
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* A <code>LSPacket</code> to encode
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* @param out
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* The output stream to which to write the data
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*/
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public void encode(IoSession session, Object message,
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ProtocolEncoderOutput out) {
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if (!(message instanceof LSPacket)) {
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Logger.error(new Exception("Wrong packet type! "
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+ message.toString()));
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return;
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}
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LSPacket p = (LSPacket) message;
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byte[] data = p.getData();
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int packetLength = data.length;
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ByteBuffer buffer;
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if (!p.isBare()) {
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buffer = ByteBuffer.allocate(data.length + 13);
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packetLength += 9;
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buffer.putInt(packetLength);
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buffer.put((byte) p.getID());
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buffer.putLong(p.getUID());
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} else {
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buffer = ByteBuffer.allocate(data.length);
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}
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buffer.put(data, 0, data.length);
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buffer.flip();
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out.write(buffer);
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}
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}
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