source: proiecte/ptvs/src/vnsim/applications/vitp/services/RouteInfo.java @ 31

/************************************************************************************
 * Copyright (C) 2008 by Politehnica University of Bucharest and Rutgers University
 * All rights reserved.
 * Refer to LICENSE for terms and conditions of use.
 ***********************************************************************************/
package vnsim.applications.vitp.services;


import java.util.*;

import vnsim.applications.trafficview.SimulatedCarInfo;
import vnsim.applications.vitp.utils.*;
import vnsim.core.*;



public class RouteInfo extends Service {

        // this is an example of a service

        SimulatedCarInfo info;

        public RouteInfo(SimulatedCarInfo info) {
                this.info = info;
        }

        public VITPRequest satisfy(VITPRequest req, HashMap params) {

                // takes the request, reduces the count field in the URI, and adds a
                // line
                // in the message body, of the type "speed=40";
                // params is a map of parameters of the local node (among them should be
                // 'speed')
//              System.out.println("Route Information modifying a request!");
                int speed =(int) info.getSpeed();

                try {
                        VITPRequest request = (VITPRequest) req;
                        req.addToBody("speed=" + speed);
                        if (info.getRealPos().currentRoadState != 0) {
                                req.addToBody("R" + info.getRoadIdx() + "P"
                                                + info.getPointIdx() + "C" + info.getRealPos().currentRoadState);
                        }
                        // reduce cnt by one
                        Vector<String> rcs = URIParser.getRCExpressions(request.getURI());
                        if (rcs == null)
                                return req;
                        for (int i = 0; i < rcs.size(); i++) {
                                if (((String) rcs.elementAt(i)).startsWith("cnt")) {
                                        String cntSir = (String) rcs.elementAt(i);
                                        int i1 = cntSir.indexOf('=');
                                        if (i1 == -1)
                                                return req;
                                        Integer old = new Integer(cntSir.substring(i1 + 1));
                                        int newcnt = old.intValue() - 1;
                                        String newSir = "cnt=" + newcnt;
                                        rcs.removeElementAt(i);
                                        rcs.addElement(newSir);

                                        String oldUri = request.getURI();
                                        String newUri = URIParser.getURIFromParts(URIParser
                                                        .getType(oldUri), URIParser.getTag(oldUri), rcs,
                                                        URIParser.getParams(oldUri));
                                        request.setURI(newUri);
                                        return request;
                                }
                        }
                        return req;
                } catch (Exception ex) {
                        System.out.println("WARNING! EXCEPTION in VehicleTraffic:"
                                        + ex.toString());
                        return req;
                }
        }
}