stationquery.cpp Example File

 /****************************************************************************
 **
 ** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
 ** Contact: http://www.qt-project.org/
 **
 ** 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;
 }