Qt Reference Documentation

# stationquery.cpp Example File

xmlpatterns/trafficinfo/stationquery.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
     ** All rights reserved.
     ** Contact: Nokia Corporation (qt-info@nokia.com)
     **
     ** This file is part of the examples of the Qt Toolkit.
     **
     ** $QT_BEGIN_LICENSE:BSD$
     ** You may use this file under the terms of the BSD license as follows:
     **
     ** "Redistribution and use in source and binary forms, with or without
     ** modification, are permitted provided that the following conditions are
     ** met:
     **   * Redistributions of source code must retain the above copyright
     **     notice, this list of conditions and the following disclaimer.
     **   * Redistributions in binary form must reproduce the above copyright
     **     notice, this list of conditions and the following disclaimer in
     **     the documentation and/or other materials provided with the
     **     distribution.
     **   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
     **     the names of its contributors may be used to endorse or promote
     **     products derived from this software without specific prior written
     **     permission.
     **
     ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
     ** $QT_END_LICENSE$
     **
     ****************************************************************************/

     #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;
     }