SUMO - Simulation of Urban MObility
MSRouteLoader.cpp
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00001 /****************************************************************************/
00008 // A class that performs the loading of routes
00009 /****************************************************************************/
00010 // SUMO, Simulation of Urban MObility; see http://sumo.sourceforge.net/
00011 // Copyright (C) 2001-2012 DLR (http://www.dlr.de/) and contributors
00012 /****************************************************************************/
00013 //
00014 //   This file is part of SUMO.
00015 //   SUMO is free software: you can redistribute it and/or modify
00016 //   it under the terms of the GNU General Public License as published by
00017 //   the Free Software Foundation, either version 3 of the License, or
00018 //   (at your option) any later version.
00019 //
00020 /****************************************************************************/
00021 
00022 // ===========================================================================
00023 // included modules
00024 // ===========================================================================
00025 #ifdef _MSC_VER
00026 #include <windows_config.h>
00027 #else
00028 #include <config.h>
00029 #endif
00030 
00031 #include <string>
00032 #include <utils/common/MsgHandler.h>
00033 #include <utils/common/UtilExceptions.h>
00034 #include <utils/xml/XMLSubSys.h>
00035 #include "MSNet.h"
00036 #include "MSRouteHandler.h"
00037 #include "MSRouteLoader.h"
00038 
00039 #ifdef CHECK_MEMORY_LEAKS
00040 #include <foreign/nvwa/debug_new.h>
00041 #endif // CHECK_MEMORY_LEAKS
00042 
00043 
00044 // ===========================================================================
00045 // method definitions
00046 // ===========================================================================
00047 MSRouteLoader::MSRouteLoader(MSNet&,
00048                              MSRouteHandler* handler)
00049     : myParser(0), myMoreAvailable(true), myHandler(handler) {
00050     myParser = XMLSubSys::getSAXReader(*myHandler);
00051 }
00052 
00053 
00054 MSRouteLoader::~MSRouteLoader() {
00055     delete myParser;
00056     delete myHandler;
00057 }
00058 
00059 
00060 void
00061 MSRouteLoader::init() {
00062     myMoreAvailable = true;
00063     if (!myParser->parseFirst(myHandler->getFileName().c_str(), myToken)) {
00064         throw ProcessError("Can not read XML-file '" + myHandler->getFileName() + "'.");
00065     }
00066 }
00067 
00068 
00069 void
00070 MSRouteLoader::loadUntil(SUMOTime time) {
00071     // read only when further data is available, no error occured
00072     //  and vehicles may be found in the between the departure time of
00073     //  the last read vehicle and the time to read until
00074     if (!myMoreAvailable || time <= myHandler->getLastDepart()) {
00075         return;
00076     }
00077 
00078     // read vehicles until specified time or the period to read vehicles
00079     //  until is reached
00080     while (myParser->parseNext(myToken)) {
00081         // return when the last read vehicle is beyond the period
00082         if (time <= myHandler->getLastDepart()) {
00083             return;
00084         }
00085     }
00086 
00087     // no data are available anymore
00088     myMoreAvailable = false;
00089     return;
00090 }
00091 
00092 
00093 bool
00094 MSRouteLoader::moreAvailable() const {
00095     return myMoreAvailable;
00096 }
00097 
00098 
00099 
00100 /****************************************************************************/
00101 
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