MyObserver.java

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/* *********************************************************************** *
 * project: org.matsim.*                                                   *
 *                                                                         *
 * *********************************************************************** *
 *                                                                         *
 * copyright       : (C) 2008 by the members listed in the COPYING,        *
 *                   LICENSE and WARRANTY file.                            *
 * email           : info at matsim dot org                                *
 *                                                                         *
 * *********************************************************************** *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *   See also COPYING, LICENSE and WARRANTY file                           *
 *                                                                         *
 * *********************************************************************** */
package tutorial.programming.ownMobsimAgentWithPerception;

import java.util.HashMap;
import java.util.Map;

import org.matsim.api.core.v01.Id;
import org.matsim.api.core.v01.Scenario;
import org.matsim.api.core.v01.TransportMode;
import org.matsim.api.core.v01.events.Event;
import org.matsim.api.core.v01.events.LinkEnterEvent;
import org.matsim.api.core.v01.events.LinkLeaveEvent;
import org.matsim.api.core.v01.events.VehicleEntersTrafficEvent;
import org.matsim.api.core.v01.events.VehicleLeavesTrafficEvent;
import org.matsim.api.core.v01.network.Link;
import org.matsim.core.events.handler.BasicEventHandler;

class MyObserver implements BasicEventHandler {
    Map<Id<Link>,Double> nVehs = new HashMap<>() ;
    private Scenario scenario;
    
    MyObserver( Scenario sc ) {
        this.scenario = sc ;
    }
    
    @Override
    public void handleEvent(Event event) {
        Id<Link> linkId = null ;

        if ( event instanceof LinkEnterEvent ) {
            linkId = ((LinkEnterEvent) event).getLinkId() ;
        } else if ( event instanceof VehicleEntersTrafficEvent ) {
            linkId = ((VehicleEntersTrafficEvent) event).getLinkId() ;
        }
        if ( nVehs.get( linkId ) != null ) {
            double val = nVehs.get( linkId ) ;
            nVehs.put( linkId, val++ ) ;
        } else {
            nVehs.put( linkId, 1. ) ;
        }
        
        String arrivalMode = TransportMode.car ;
        if ( event instanceof LinkLeaveEvent ) {
            linkId = ((LinkLeaveEvent) event).getLinkId() ;
        } else if ( event instanceof VehicleLeavesTrafficEvent ) {      
            linkId = ((VehicleLeavesTrafficEvent)event).getLinkId() ;
            arrivalMode = ((VehicleLeavesTrafficEvent)event).getNetworkMode() ;
        }
        if ( arrivalMode.equals( TransportMode.car ) ) {
            if ( nVehs.get( linkId ) != null ) {
                double val = nVehs.get( linkId ) ;
                nVehs.put( linkId,  val-- ) ;
            } else {
                throw new RuntimeException("should not happen; a car should always have to enter a link before leaving it") ;
            }
        }
    }
    
    double congestionLevel(Id<Link> linkId) {
        final Double nn = nVehs.get( linkId );
        if ( nn == null ) {
            return 0. ;
        }
        final Link link = this.scenario.getNetwork().getLinks().get(linkId);
        double nLanes = link.getNumberOfLanes() ;
        double length = link.getLength() ;
        double estimStorCap = nLanes * length / 7.5 ; // estimated storage capacity
        return nn / estimStorCap ;
    }

    @Override
    public void reset(int iteration) {
    }


}