Qt Reference Documentation

stationquery.cpp Example File

xmlpatterns/trafficinfo/stationquery.cpp
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 #include "stationquery.h"

 #include <QtCore/QStringList>
 #include <QtXmlPatterns/QXmlQuery>

 StationInformation::StationInformation()
 {
 }

 StationInformation::StationInformation(const QString &id, const QString &name)
     : m_id(id), m_name(name)
 {
 }

 QString StationInformation::id() const
 {
     return m_id;
 }

 QString StationInformation::name() const
 {
     return m_name;
 }

 StationInformation::List StationQuery::query(const QString &name)
 {
     const QString stationIdQueryUrl = QString("doc(concat('http://wap.trafikanten.no/FromLink1.asp?fra=', $station))/wml/card/p/small/a[@title='Velg']/substring(@href,18)");
     const QString stationNameQueryUrl = QString("doc(concat('http://wap.trafikanten.no/FromLink1.asp?fra=', $station))/wml/card/p/small/a[@title='Velg']/string()");

     QStringList stationIds;
     QStringList stationNames;

     QXmlQuery query;

     query.bindVariable("station", QVariant(QString::fromLatin1(QUrl::toPercentEncoding(name))));
     query.setQuery(stationIdQueryUrl);
     query.evaluateTo(&stationIds);

     query.bindVariable("station", QVariant(QString::fromLatin1(QUrl::toPercentEncoding(name))));
     query.setQuery(stationNameQueryUrl);
     query.evaluateTo(&stationNames);

     if (stationIds.count() != stationNames.count()) // something went wrong...
         return StationInformation::List();

     StationInformation::List information;
     for (int i = 0; i < stationIds.count(); ++i)
         information.append(StationInformation(stationIds.at(i), stationNames.at(i)));

     return information;
 }
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