code: /*****************************************************************
  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 gr.demokritos.iit.jinsect.distributed;
  
  
  
  import jade.proto.*;
  import jade.lang.acl.*;
  
  import jade.domain.JADEAgentManagement.*;
  import jade.domain.mobility.MobilityOntology;
  import jade.domain.FIPANames;
  import jade.content.onto.basic.Action;
  import jade.content.onto.basic.Result;
  
    /**
     * This behaviour extends SimpleAchieveREInitiator in order
     * to request to the AMS the list of available locations where
     * the agent can move.
     * Then, it displays these locations into the GUI
     * @author Fabio Bellifemine - CSELT S.p.A.
     * @version $Date: 2003-02-25 13:29:42 +0100 (mar, 25 feb 2003) $ $Revision: 3687 $
     */
  public class GetAvailableLocationsBehaviour extends SimpleAchieveREInitiator {
  
      private ACLMessage request;
      
     public GetAvailableLocationsBehaviour(MobileAgent a) {
       // call the constructor of FipaRequestInitiatorBehaviour
       super(a, new ACLMessage(ACLMessage.REQUEST));
       request = (ACLMessage)getDataStore().get(REQUEST_KEY);
       // fills all parameters of the request ACLMessage
       request.clearAllReceiver();
       request.addReceiver(a.getAMS());
       request.setLanguage(FIPANames.ContentLanguage.FIPA_SL0);
       request.setOntology(MobilityOntology.NAME);
       request.setProtocol(FIPANames.InteractionProtocol.FIPA_REQUEST);
       // creates the content of the ACLMessage
       try {
         Action action = new Action();
         action.setActor(a.getAMS());
         action.setAction(new QueryPlatformLocationsAction());
         a.getContentManager().fillContent(request, action);
       }
       catch(Exception fe) {
  	      fe.printStackTrace();
       }
       // creates the Message Template
       // template = MessageTemplate.and(MessageTemplate.MatchOntology(MobilityOntology.NAME),template);
       // reset the fiparequestinitiatorbheaviour in order to put new values
       // for the request aclmessage and the template
       reset(request);
     }
  
     protected void handleNotUnderstood(ACLMessage reply) {
       System.out.println(myAgent.getLocalName()+ " handleNotUnderstood : "+reply.toString());
     }
  
     protected void handleRefuse(ACLMessage reply) {
       System.out.println(myAgent.getLocalName()+ " handleRefuse : "+reply.toString());
     }
  
     protected void handleFailure(ACLMessage reply) {
       System.out.println(myAgent.getLocalName()+ " handleFailure : "+reply.toString());
     }
  
     protected void handleAgree(ACLMessage reply) {
     }
  
     protected void handleInform(ACLMessage inform) {
       String content = inform.getContent();
       //System.out.println(inform.toString());
       try {
         Result results = (Result)myAgent.getContentManager().extractContent(inform);
         //update the GUI
         ((MobileAgent)myAgent).updateLocations(results.getItems().iterator());
       }
       catch(Exception e) {
         e.printStackTrace();
       }
     }
     
  }
  