RONet.cpp

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/****************************************************************************/
// The router's network representation
/****************************************************************************/
// SUMO, Simulation of Urban MObility; see http://sumo.sourceforge.net/
// Copyright (C) 2001-2011 DLR (http://www.dlr.de/) and contributors
/****************************************************************************/
//
//   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.
//
/****************************************************************************/


// ===========================================================================
// included modules
// ===========================================================================
#ifdef _MSC_VER
#include <windows_config.h>
#else
#include <config.h>
#endif

#include <string>
#include <iostream>
#include <fstream>
#include <deque>
#include <queue>
#include "ROEdge.h"
#include "RONode.h"
#include "RONet.h"
#include "RORoute.h"
#include "RORouteDef.h"
#include "ROVehicle.h"
#include <utils/common/SUMOVTypeParameter.h>
#include <utils/common/SUMOAbstractRouter.h>
#include <utils/options/OptionsCont.h>
#include <utils/common/UtilExceptions.h>
#include <utils/common/MsgHandler.h>
#include <utils/common/ToString.h>
#include <utils/common/RandHelper.h>
#include <utils/common/SUMOVehicleClass.h>
#include <utils/iodevices/OutputDevice.h>

#ifdef CHECK_MEMORY_LEAKS
#include <foreign/nvwa/debug_new.h>
#endif // CHECK_MEMORY_LEAKS


// ===========================================================================
// method definitions
// ===========================================================================
RONet::RONet() throw()
    : myVehicleTypes(),
      myRoutesOutput(0), myRouteAlternativesOutput(0),
      myReadRouteNo(0), myDiscardedRouteNo(0), myWrittenRouteNo(0),
      myHaveRestrictions(false) {}


RONet::~RONet() throw() {
    myNodes.clear();
    myEdges.clear();
    myVehicleTypes.clear();
    myRoutes.clear();
    myVehicles.clear();
}


bool
RONet::addEdge(ROEdge* edge) throw() {
    if (!myEdges.add(edge->getID(), edge)) {
        WRITE_ERROR("The edge '" + edge->getID() + "' occurs at least twice.");
        delete edge;
        return false;
    }
    return true;
}


void
RONet::addNode(RONode* node) throw() {
    if (!myNodes.add(node->getID(), node)) {
        WRITE_ERROR("The node '" + node->getID() + "' occurs at least twice.");
        delete node;
    }
}


bool
RONet::addRouteDef(RORouteDef* def) throw() {
    return myRoutes.add(def->getID(), def);
}


void
RONet::openOutput(const std::string& filename, bool useAlternatives) throw(IOError) {
    myRoutesOutput = &OutputDevice::getDevice(filename);
    myRoutesOutput->writeXMLHeader("routes", "", "xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xsi:noNamespaceSchemaLocation=\"http://sumo.sf.net/xsd/routes_file.xsd\"");
    if (useAlternatives) {
        size_t len = filename.length();
        if (len > 4 && filename.substr(len - 4) == ".xml") {
            myRouteAlternativesOutput = &OutputDevice::getDevice(filename.substr(0, len-4)+".alt.xml");
        } else {
            myRouteAlternativesOutput = &OutputDevice::getDevice(filename+".alt");
        }
        myRouteAlternativesOutput->writeXMLHeader("route-alternatives", "", "xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xsi:noNamespaceSchemaLocation=\"http://sumo.sf.net/xsd/routes_file.xsd\"");
    }
}


void
RONet::closeOutput() throw() {
    // end writing
    if (myRoutesOutput!= 0) {
        myRoutesOutput->close();
    }
    // only if opened
    if (myRouteAlternativesOutput!=0) {
        myRouteAlternativesOutput->close();
    }
}



SUMOVTypeParameter*
RONet::getVehicleTypeSecure(const std::string& id) throw() {
    // check whether the type was already known
    SUMOVTypeParameter* type = myVehicleTypes.get(id);
    if (type!=0) {
        return type;
    }
    if (id=="") {
        // ok, no vehicle type was given within the user input
        //  return the default type
        return 0;
    }
    // Assume, the user will define the type somewhere else
    //  return a type which contains the id only
    type = new SUMOVTypeParameter();
    type->id = id;
    type->onlyReferenced = true;
    addVehicleType(type);
    return type;
}


bool
RONet::addVehicleType(SUMOVTypeParameter* type) throw() {
    if (!myVehicleTypes.add(type->id, type)) {
        WRITE_ERROR("The vehicle type '" + type->id + "' occurs at least twice.");
        delete type;
        return false;
    }
    return true;
}


bool
RONet::addVehicle(const std::string& id, ROVehicle* veh) throw() {
    if (myVehIDs.find(id)==myVehIDs.end()&&myVehicles.add(id, veh)) {
        myVehIDs.insert(id);
        myReadRouteNo++;
        return true;
    }
    WRITE_ERROR("The vehicle '" + id + "' occurs at least twice.");
    return false;
}


bool
RONet::computeRoute(OptionsCont& options, SUMOAbstractRouter<ROEdge,ROVehicle> &router,
                    const ROVehicle* const veh) {
    MsgHandler* mh = MsgHandler::getErrorInstance();
    std::string noRouteMsg = "The vehicle '" + veh->getID() + "' has no valid route.";
    if (options.getBool("ignore-errors")) {
        mh = MsgHandler::getWarningInstance();
    }
    RORouteDef* const routeDef = veh->getRouteDefinition();
    // check if the route definition is valid
    if (routeDef==0) {
        mh->inform(noRouteMsg);
        return false;
    }
    // check whether the route was already saved
    if (routeDef->isSaved()) {
        return true;
    }
    //
    RORoute* current = routeDef->buildCurrentRoute(router, veh->getDepartureTime(), *veh);
    if (current==0||current->size()==0) {
        delete current;
        mh->inform(noRouteMsg);
        return false;
    }
    // check whether we have to evaluate the route for not containing loops
    if (options.getBool("remove-loops")) {
        current->recheckForLoops();
    }
    // check whether the route is still valid
    if (current->size()==0) {
        delete current;
        mh->inform(noRouteMsg + " (after removing loops)");
        return false;
    }
    // add built route
    routeDef->addAlternative(router, veh, current, veh->getDepartureTime());
    return true;
}


SUMOTime
RONet::saveAndRemoveRoutesUntil(OptionsCont& options, SUMOAbstractRouter<ROEdge,ROVehicle> &router,
                                SUMOTime time) {
    SUMOTime lastTime = -1;
    // write all vehicles (and additional structures)
    while (myVehicles.size()!=0) {
        // get the next vehicle
        const ROVehicle* const veh = myVehicles.getTopVehicle();
        SUMOTime currentTime = veh->getDepartureTime();
        // check whether it shall not yet be computed
        if (currentTime>time) {
            lastTime = currentTime;
            break;
        }
        // check whether to print the output
        if (lastTime!=currentTime&&lastTime!=-1) {
            // report writing progress
            if (options.getInt("stats-period")>=0 && ((int) currentTime%options.getInt("stats-period"))==0) {
                WRITE_MESSAGE("Read: " + toString(myReadRouteNo) + ",  Discarded: " + toString(myDiscardedRouteNo) + ",  Written: " + toString(myWrittenRouteNo));
            }
        }
        lastTime = currentTime;

        // ok, compute the route (try it)
        if (computeRoute(options, router, veh)) {
            // write the route
            veh->saveAllAsXML(router, *myRoutesOutput, myRouteAlternativesOutput, options.getBool("exit-times"));
            myWrittenRouteNo++;
            // remove the route if it is not longer used
            /*
            if (!myRoutes.erase(route->getID())) {
                WRITE_WARNING("Could not remove " + route->getID());
            }
            */
        } else {
            myDiscardedRouteNo++;
        }
        // and the vehicle
        myVehicles.erase(veh->getID());
    }
    return lastTime;
}


bool
RONet::furtherStored() {
    return myVehicles.size()>0;
}


ROEdge*
RONet::getRandomSource() throw() {
    // check whether an edge may be returned
    checkSourceAndDestinations();
    if (mySourceEdges.size()==0) {
        return 0;
    }
    // choose a random edge
    return RandHelper::getRandomFrom(mySourceEdges);
}


const ROEdge*
RONet::getRandomSource() const throw() {
    // check whether an edge may be returned
    checkSourceAndDestinations();
    if (mySourceEdges.size()==0) {
        return 0;
    }
    // choose a random edge
    return RandHelper::getRandomFrom(mySourceEdges);
}



ROEdge*
RONet::getRandomDestination() throw() {
    // check whether an edge may be returned
    checkSourceAndDestinations();
    if (myDestinationEdges.size()==0) {
        return 0;
    }
    // choose a random edge
    return RandHelper::getRandomFrom(myDestinationEdges);
}


const ROEdge*
RONet::getRandomDestination() const throw() {
    // check whether an edge may be returned
    checkSourceAndDestinations();
    if (myDestinationEdges.size()==0) {
        return 0;
    }
    // choose a random edge
    return RandHelper::getRandomFrom(myDestinationEdges);
}


void
RONet::checkSourceAndDestinations() const {
    if (myDestinationEdges.size()!=0||mySourceEdges.size()!=0) {
        return;
    }
    const std::map<std::string, ROEdge*> &edges = myEdges.getMyMap();
    for (std::map<std::string, ROEdge*>::const_iterator i=edges.begin(); i!=edges.end(); ++i) {
        ROEdge* e = (*i).second;
        ROEdge::EdgeType type = e->getType();
        // !!! add something like "classified edges only" for using only sources or sinks
        if (type!=ROEdge::ET_SOURCE) {
            myDestinationEdges.push_back(e);
        }
        if (type!=ROEdge::ET_SINK) {
            mySourceEdges.push_back(e);
        }
    }
}


unsigned int
RONet::getEdgeNo() const {
    return (unsigned int) myEdges.size();
}


const std::map<std::string, ROEdge*> &
RONet::getEdgeMap() const {
    return myEdges.getMyMap();
}


bool
RONet::hasRestrictions() const {
    return myHaveRestrictions;
}


void
RONet::setRestrictionFound() {
    myHaveRestrictions = true;
}



/****************************************************************************/