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package bboss.org.jgroups.protocols;


import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;

import bboss.org.jgroups.Header;



/**
 * Generic transport header, used by TP.
 * @author Bela Ban
 * @version $Id: TpHeader.java,v 1.6 2010/06/15 06:44:35 belaban Exp $
 */
public class TpHeader extends Header {
    public String channel_name=null;
    int size=0;

    public TpHeader() {
    }  // used for externalization

    public TpHeader(String n) {
        channel_name=n;
        if(channel_name != null)
            size=channel_name.length()+2; // +2 for writeUTF()
    }

    public String toString() {
        return "[channel_name=" + channel_name + ']';
    }

    public int size() {
        return size;
    }

    public void writeTo(DataOutputStream out) throws IOException {
        out.writeUTF(channel_name);
    }

    public void readFrom(DataInputStream in) throws IOException, IllegalAccessException, InstantiationException {
        channel_name=in.readUTF();
        if(channel_name != null)
            size=channel_name.length()+2; // +2 for writeUTF()
    }
}