msgindication.java

JADE(JAVA Agent开发框架)是一个完全由JAVA语言开发的软件,它简化了多Agent系统的实现。

/*****************************************************************
JADE - Java Agent DEvelopment Framework is a framework to develop 
multi-agent systems in compliance with the FIPA specifications.
Copyright (C) 2000 CSELT S.p.A. 

GNU Lesser General Public License

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation, 
version 2.1 of the License. 

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA  02111-1307, USA.
*****************************************************************/


package jade.tools.DummyAgent;

// Import required Java classes
import java.util.*;
import java.io.*;
import java.text.*;

// Import required Jade classes
import jade.core.*;
import jade.lang.acl.*;

import jade.util.Logger;

/**
@author Giovanni Caire - CSELT S.p.A
@version $Date: 2004-07-19 17:54:06 +0200 (lun, 19 lug 2004) $ $Revision: 5217 $
*/

class MsgIndication
{
	private static final int TYPE_LEN = 20;
	public static final  int INCOMING = 0;
	public static final  int OUTGOING = 1;

	public ACLMessage msg;
	public int    direction;
	public Date   date;
	
	//logging
	private static Logger logger = Logger.getMyLogger(MsgIndication.class.getName());

	private static DateFormat df = DateFormat.getDateTimeInstance(DateFormat.SHORT, DateFormat.SHORT);

	MsgIndication()
	{
		msg = new ACLMessage(ACLMessage.NOT_UNDERSTOOD);
		direction = OUTGOING;
		date = new Date();
	}

	MsgIndication(ACLMessage m, int dir, Date d)
	{
		msg = (ACLMessage) m.clone();
		direction = dir;
		date = d;
	}

	String getIndication()
	{
		int perf = msg.getPerformative();
		String tmpType = ACLMessage.getPerformative(perf);
		int blancCharCnt = TYPE_LEN - tmpType.length();
		while (blancCharCnt-- > 0)
			tmpType += " ";
		
		// Put the destination agent group in form of a string
		String dest = new String();
		Iterator destAG = msg.getAllReceiver();
		
		while(destAG.hasNext())
			dest = dest + ((AID)destAG.next()).getName() + " ";

		String tmpDir = (direction == OUTGOING ? "sent to  " : "recv from");
	
		String tmpPeer = (direction == OUTGOING ? dest : msg.getSender().getName());
		return(df.format(date) + ":  " + tmpType + " " + tmpDir + "   " + tmpPeer);
	}

	void setMessage(ACLMessage m)
	{
		msg = (ACLMessage) m.clone();
	}

	ACLMessage getMessage()
	{
		return(msg);
	}

	public String toString()
	{
		return(df.format(date) + "\n" + direction + "\n" + msg.toString());
	}

	void toText(BufferedWriter w)
	{
		try
		{
			// Date
			w.write(df.format(date));
			w.newLine();
			// Direction
			w.write(String.valueOf(direction));
			w.newLine();
			// Message length 
			String tmp = msg.toString();
			w.write(String.valueOf(tmp.length()));
			w.newLine();
			// Message
			w.write(tmp);
			w.newLine();

			w.flush();
		}
		catch(IOException e) { 
		if(logger.isLoggable(Logger.WARNING))
			logger.log(Logger.WARNING,"IO Exception in MsgIndication.toText()"); }
	}

	static MsgIndication fromText(BufferedReader r)
	{
		MsgIndication mi = new MsgIndication();
		try
		{
			String  line;
			Integer ii;

			// Date
			line = r.readLine(); 
			mi.date = df.parse(line);

			// Direction
			ii = new Integer(r.readLine());
			mi.direction = ii.intValue();
			 
			// Message length
			ii = new Integer(r.readLine());
			int len = ii.intValue();

			// Message
			char[] cBuf = new char[len];
			r.read(cBuf,0,len);
			
			StringACLCodec codec =  new StringACLCodec (new StringReader(new String(cBuf)),null);
			mi.msg = codec.decode();

			// Read the last newline
			line = r.readLine();
 
		}
		catch(IOException e) { 
		if(logger.isLoggable(Logger.WARNING))
			logger.log(Logger.WARNING,"IO Exception in MsgIndication.fromText()"); }
		catch (java.text.ParseException e1) { 
		if(logger.isLoggable(Logger.WARNING))
			logger.log(Logger.WARNING,"ParseException in MsgIndication.fromText()"); }
		catch (ACLCodec.CodecException e2) {
			if(logger.isLoggable(Logger.WARNING))
				logger.log(Logger.WARNING,"ParseException in parsing the ACL message"); } //Exception thrown by ACLMessage.fromText()

		return(mi);
	}
}