C++ QXmlQuery::bindVariable方法代码示例

//! [0]
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;
}

std::string parserxml::getAnyValue(std::string pNodeDirectionValue)
{
    if( !_file.open(QIODevice::ReadOnly))
    {
        qDebug() << "No se pudo abrir el XML para lectura.";
    }
    else
    {
        QXmlQuery query;
        query.bindVariable("document", &_file);
        std::string stringdocument = "doc($document)";
        std::string finalstring = std::string(stringdocument) + std::string(pNodeDirectionValue);
        query.setQuery(QString::fromStdString(finalstring));
        if(!query.isValid()) 
        {
           qDebug()<< "Xpath invalido.";
        }
        QString queryresult;
        query.evaluateTo(&queryresult);
        if (queryresult == "\n")
        {
            queryresult = "";
        }
        _file.close();
        return queryresult.toStdString();
    }  
}

void ShoutcastFetcher::newStationsAvailable(QIODevice * openInputDevice, const QString & keyWord)
{
	// Using read() putting the content into a QBuffer to workaround
	// some strange hang if passing IO device directly into
	// QXmlQuery object.
	QByteArray content = openInputDevice->read(maxSize);
	QBuffer buf(&content);
	buf.open(QIODevice::ReadOnly);
	QXmlQuery q;
	q.bindVariable("stations", &buf);
	q.setQuery("for $i in doc($stations)/stationlist/station " \
			   "let $tunein := doc($stations)/stationlist/tunein/@base " \
			   "return (string($i/@name), string($i/@id), string($i/@br), string($i/@genre)," \
			   "        string($i/@lc), string($i/@mt), string($i/@ct), string($tunein))");
	QStringList strings;
	q.evaluateTo(&strings);
	m_keywordStationMapping[keyWord].clear();
	ShoutcastStationList & sl = m_keywordStationMapping[keyWord];
	for (QStringList::const_iterator iter = strings.constBegin(); iter != strings.constEnd(); iter += 8)
	{
		QString tuneIn = stationsURL + *(iter + 1);
		ShoutcastStation s(*iter, (*(iter + 1)).toInt(), (*(iter + 2)).toInt(),
						   *(iter + 3), (*(iter + 4)).toInt(), *(iter + 5), *(iter + 6),
						   tuneIn);
		sl.append(s);
	}
	emit newStationsAvailable(keyWord);
}

void AVRStudioXMLParser::Parse(QString configDirPath, Part *pPart)
{
    QXmlQuery query;
    QString result;
    query.bindVariable("partName", QVariant(configDirPath));
    query.setQuery(GetXQuery());
    query.evaluateTo(&result);

    // for future use
    QString errorMsg;
    int line;
    int col;

    QDomDocument doc;
    if(!doc.setContent(result, &errorMsg, &line, &col))
        return;

    QDomNode root = doc.firstChild();
    QDomNode fuses = root.firstChild();
    QDomNode locks = fuses.nextSibling();
    QDomNode interfaces = locks.nextSibling();

    pPart->SetFuseBits(GetBits(fuses.firstChild()));
    pPart->SetLockBits(GetBits(locks.firstChild()));
    pPart->SetProgrammingInterfaces(GetInterfaces(interfaces.firstChild()));
}

void QueryMainWindow::evaluate(const QString &str)
{
    /* This function takes the input string and displays the
     * appropriate output using QXmlQuery.
     */
    QXmlQuery query;

    QFile sourceDocument;
    sourceDocument.setFileName(":/files/cookbook.xml");
    sourceDocument.open(QIODevice::ReadOnly);
    query.bindVariable("inputDocument", &sourceDocument);

    query.setQuery(str);

    if(!query.isValid())
        return;

    QByteArray outArray;
    QBuffer buffer(&outArray);
    buffer.open(QIODevice::ReadWrite);
    
    QXmlFormatter formatter(query, &buffer);

    if(!query.evaluateTo(&formatter))
        return;
 
    buffer.close();
    qFindChild<QTextEdit*>(this, "outputTextEdit")->setPlainText(QString::fromUtf8(outArray.constData()));
    
}

void NetFlixQueueProxy::getQueueRequestCompleted(int retCode, QString body){
    qDebug() << "queue request completed!!";
    qDebug() << retCode;

    QXmlQuery query;
    QString result;

    QBuffer device;
    device.setData(body.toUtf8());
    device.open(QIODevice::ReadOnly);

    query.bindVariable("netflix_queue",&device);
    query.setQuery(QUrl("qrc:/queries/queue.xq"));
    if (query.isValid())
    {
        if (query.evaluateTo(&result))
            qDebug() << result;
        else
            qDebug() << "Evaluate failed";
    }
    else
        qDebug() << "setQuery Failed.";


}

QString Server::commandForPlayer(QString aPlayerName)
{
    mCommands->reset();
    QXmlQuery* xmlQuery = new QXmlQuery;
    xmlQuery->bindVariable(KXmlFileName,mCommands);

    xmlQuery->bindVariable(KPlayer,QVariant(aPlayerName));
    xmlQuery->setQuery(KXqReadCommandForPlayer);
    QString result = QString();
    if(xmlQuery->isValid())
    {
        xmlQuery->evaluateTo(&result);
    }
    delete xmlQuery;
    return result;
}

void RssFeedNode::render(Grantlee::OutputStream* stream, Grantlee::Context* c)
{
  QNetworkAccessManager *mgr = new QNetworkAccessManager(this);
  QUrl url(Grantlee::getSafeString(m_url.resolve(c)));
  QNetworkReply *reply = mgr->get(QNetworkRequest(url));
  QEventLoop eLoop;
  connect( mgr, SIGNAL( finished( QNetworkReply * ) ), &eLoop, SLOT( quit() ) );
  eLoop.exec( QEventLoop::ExcludeUserInputEvents );

  c->push();
  foreach(Grantlee::Node *n, m_childNodes) {
    if (!n->inherits(XmlNamespaceNode::staticMetaObject.className()))
      continue;
    Grantlee::OutputStream _dummy;
    n->render(&_dummy, c);
  }

  QXmlQuery query;
  QByteArray ba = reply->readAll();

  QBuffer buffer;
  buffer.setData(ba);
  buffer.open(QIODevice::ReadOnly);
  query.bindVariable("inputDocument", &buffer);
  QString ns;
  QHash<QString, QVariant> h = c->lookup("_ns").toHash();
  QHash<QString, QVariant>::const_iterator it = h.constBegin();
  const QHash<QString, QVariant>::const_iterator end = h.constEnd();
  for ( ; it != end; ++it ) {
    if (it.key().isEmpty()) {
      ns += QLatin1Literal( "declare default element namespace " ) + QLatin1Literal( " \"" ) + it.value().toString() + QLatin1Literal( "\";\n" );
    } else {
      ns += QLatin1Literal( "declare namespace " ) + it.key() + QLatin1Literal( " = \"" ) + it.value().toString() + QLatin1Literal( "\";\n" );
    }
  }
  query.setQuery(ns + "doc($inputDocument)" + Grantlee::getSafeString(m_query.resolve(c)).get());

  QXmlResultItems result;
  query.evaluateTo(&result);

  QXmlItem item(result.next());
  int count = 0;
  while (!item.isNull()) {
      if (count++ > 20)
        break;
      query.setFocus(item);
      c->push();
      foreach(Grantlee::Node *n, m_childNodes) {
        if (n->inherits(XmlNamespaceNode::staticMetaObject.className()))
          continue;
        c->insert("_q", QVariant::fromValue(query));
        n->render(stream, c);
      }
      c->pop();
      item = result.next();
  }
  c->pop();
}

void FeedEntryListModel::initFeedEntryList()
{
    QFile queryFile(":/cxReader/xquery/feedEntryList.xq");
    queryFile.open(QIODevice::ReadOnly);

    QXmlQuery query;
    query.setNetworkAccessManager(this->config->manager());
    query.bindVariable("file", QVariant(this->config->baseUrl() + "/feeds/"+this->id));
    query.setQuery(&queryFile);
    this->namePool = query.namePool();
    query.evaluateTo(this);

    queryFile.close();
}

QStringList ExternalPlaylist::executeXmlQuery(const QString& libraryPath, const QString& xPath, const QStringList& parameters){

  QStringList results;

  QFile xmlFile(libraryPath);
  if (!xmlFile.open(QIODevice::ReadOnly))
    return results;

  QXmlQuery xmlQuery;
  xmlQuery.bindVariable("inputDocument", &xmlFile);

  // bind any other parameters
  for(int i=0; i<(signed)parameters.size(); i += 2){
    if(i + 1 >= (signed)parameters.size())
      break;
    xmlQuery.bindVariable(parameters[i], QVariant(parameters[i+1]));
  }

  xmlQuery.setQuery(xPath);
  xmlQuery.evaluateTo(&results);

  xmlFile.close();
  return results;
}

void ShoutcastFetcher::genresAvailable(QIODevice * openInputDevice)
{
	// Using read() putting the content into a QBuffer to workaround
	// some strange hang if passing IO device directly into
	// QXmlQuery object.
	m_genres.clear();
	QByteArray content = openInputDevice->read(maxSize);
	QBuffer buf(&content);
	buf.open(QIODevice::ReadOnly);
	QXmlQuery q;
	q.bindVariable("glist", &buf);
	q.setQuery("for $i in doc($glist)/genrelist/genre/@name return string($i)");
	m_success = q.evaluateTo(&m_genres);
	emit genresAvailable();
}

// Program entry point
int main(int argc, char **argv)
{
	// Validate arguments
	if (argc < 3) {
		qFatal("Usage: %s <html-file> <xquery-file>\nUse - to read from stdin", argv[0]);
	}
	if (!strcmp(argv[1], "-") && !strcmp(argv[2], "-")) {
		qFatal("Err, cannot read both HTML and XQuery file from stdin");
	}

	// We'll need a QCoreApplication instance for this
	QCoreApplication app(argc, argv);

	// Setup query first, so we can use its name pool
	QXmlQuery query;

	// Read HTML data
	QFile htmlFile;
	if (!openFile(&htmlFile, argv[1])) {
		qFatal("Err, can't open HTML file %s", argv[1]);
	}
	QByteArray source = htmlFile.readAll();
	QHtmlNodeModel model(query.namePool(), source, QUrl::fromLocalFile(argv[1]));

	// Bind the "dom" variable to the root element of the document
	query.bindVariable("dom", model.dom());

	// Setup the query
	QFile queryFile;
	if (!openFile(&queryFile, argv[2])) {
		qFatal("Err, can't open XQuery file %s", argv[2]);
	}
	query.setQuery(&queryFile, QUrl::fromLocalFile(argv[2]));

	// Setup a formatter printing to stdout
	QFile out;
	out.open(stdout, QIODevice::WriteOnly);
	QXmlFormatter formatter(query, &out);

	// Evaluate and exit
	if (!query.evaluateTo(&formatter)) {
		return 1;
	}
	return 0;
}

void ErrorHandler::handleMessage(QtMsgType type,
                                 const QString &description,
                                 const QUrl &identifier,
                                 const QSourceLocation &)
{
    /* Don't use pDebug() in this function, it results in infinite
     * recursion. Talking from experience.. */

    Message msg;
    msg.setType(type);
    msg.setIdentifier(identifier);

    /* Let's remove all the XHTML markup. */
    QBuffer buffer;
    buffer.setData(description.toLatin1());
    buffer.open(QIODevice::ReadOnly);

    QXmlQuery query;
    query.bindVariable(QLatin1String("desc"), &buffer);
    query.setQuery(QLatin1String("string(doc($desc))"));

    QStringList result;
    const bool success = query.evaluateTo(&result);

    if(!description.startsWith(QLatin1String("\"Test-suite harness error:")))
    {
        const QString msg(QString::fromLatin1("Invalid description: %1").arg(description));
        QVERIFY2(success, qPrintable(msg));

        if(!success)
            QTextStream(stderr) << msg;
    }


    if(!result.isEmpty())
        msg.setDescription(result.first());

    m_messages.append(msg);
}

void Parser131500ComAu::parseStationsByName(QNetworkReply *networkReply)
{
    StationsResultList result;

    QRegExp regexp = QRegExp("<select name=\"(.*)\" id=\"from\" size=\"6\" class=\"multiple\">(.*)</select>");
    regexp.setMinimal(true);

    regexp.indexIn(networkReply->readAll());

    QString element = "<?xml version=\"1.0\" encoding=\"ISO-8859-1\"?><html xmlns=\"http://www.w3.org/1999/xhtml\">\n<body>\n" + regexp.cap(0) + "\n</body>\n</html>\n";

    QBuffer readBuffer;
    readBuffer.setData(element.toAscii());
    readBuffer.open(QIODevice::ReadOnly);

    QXmlQuery query;
    query.bindVariable("path", &readBuffer);
    //Query for more than one result
    query.setQuery("declare default element namespace \"http://www.w3.org/1999/xhtml\"; declare variable $path external; doc($path)/html/body/select/option/string()");

    QStringList stationNames;
    if (!query.evaluateTo(&stationNames))
    {
        qDebug() << "parser131500ComAu::getStationsByName - Query 1 Failed";
    }

    for (int i = 0; i < stationNames.count(); i++) {
        //Remove unneeded stuff from the result
        stationNames[i].replace(" (Location)", "");
        StationsResultItem *item = new StationsResultItem();
        item->setStationName(stationNames[i].trimmed());
        result.appendItem(item);
    }

    emit stationsResult(&result);
}

void ParserHafasXml::parseSearchJourney(QNetworkReply *networkReply)
{
    lastJourneyResultList = new JourneyResultList();
    journeyDetailInlineData.clear();

    QBuffer readBuffer;
    readBuffer.setData(networkReply->readAll());
    readBuffer.open(QIODevice::ReadOnly);

    QXmlQuery query;
    query.bindVariable("path", &readBuffer);
    query.setQuery("doc($path)/ResC/Err//@text/string()");

    QStringList errorResult;
    if (!query.evaluateTo(&errorResult))
    {
        qDebug() << "parserHafasXml::ErrorTest - Query Failed";
    }

    if (errorResult.count() > 0 ) {
        emit errorOccured(errorResult.join("").trimmed());
        qWarning()<<"ParserHafasXml::parseSearchJourneyPart2:"<<errorResult.join("");
        return;
    }

    //Query for station infos
    query.setQuery("doc($path)/ResC/ConRes/ConnectionList/Connection/@id/string()");

    QStringList resultIds;
    if (!query.evaluateTo(&resultIds))
    {
        qDebug() << "parserHafasXml::getJourneyData 2 - Query Failed";
    }

    if (resultIds.count() <= 0) {
        emit journeyResult(lastJourneyResultList);
        return;
    }

    for(int i = 0;i<resultIds.count(); i++) {
        //qDebug()<<"Connection:"<<resultIds[i];

        query.setQuery("doc($path)/ResC/ConRes/ConnectionList/Connection[@id='" + resultIds[i] + "']/Overview/Date/string()");
        QStringList dateResult;
        if (!query.evaluateTo(&dateResult))
        {
            qDebug() << "parserHafasXml::getJourneyData 3 - Query Failed";
        }

        query.setQuery("doc($path)/ResC/ConRes/ConnectionList/Connection[@id='" + resultIds[i] + "']/Overview/Transfers/string()");
        QStringList transfersResult;
        if (!query.evaluateTo(&transfersResult))
        {
            qDebug() << "parserHafasXml::getJourneyData 4 - Query Failed";
        }

        query.setQuery("doc($path)/ResC/ConRes/ConnectionList/Connection[@id='" + resultIds[i] + "']/Overview/Duration/Time/string()");
        QStringList durationResult;
        if (!query.evaluateTo(&durationResult))
        {
            qDebug() << "parserHafasXml::getJourneyData 5 - Query Failed";
        }

        query.setQuery("doc($path)/ResC/ConRes/ConnectionList/Connection[@id='" + resultIds[i] + "']/Overview/Products/Product/@cat/string()");
        QStringList trainsResult;
        if (!query.evaluateTo(&trainsResult))
        {
            qDebug() << "parserHafasXml::getJourneyData 6 - Query Failed";
        }

        query.setQuery("doc($path)/ResC/ConRes/ConnectionList/Connection[@id='" + resultIds[i] + "']/Overview/Departure/BasicStop/Station/@name/string()");
        QStringList depResult;
        if (!query.evaluateTo(&depResult))
        {
            qDebug() << "parserHafasXml::getJourneyData 7 - Query Failed";
        }

        query.setQuery("doc($path)/ResC/ConRes/ConnectionList/Connection[@id='" + resultIds[i] + "']/Overview/Arrival/BasicStop/Station/@name/string()");
        QStringList arrResult;
        if (!query.evaluateTo(&arrResult))
        {
            qDebug() << "parserHafasXml::getJourneyData 8 - Query Failed";
        }

        query.setQuery("doc($path)/ResC/ConRes/ConnectionList/Connection[@id='" + resultIds[i] + "']/Overview/Departure/BasicStop/Dep/Time/string()");
        QStringList depTimeResult;
        if (!query.evaluateTo(&depTimeResult))
        {
            qDebug() << "parserHafasXml::getJourneyData 9 - Query Failed";
        }

        query.setQuery("doc($path)/ResC/ConRes/ConnectionList/Connection[@id='" + resultIds[i] + "']/Overview/Departure/BasicStop/Dep/Platform/Text/string()");
        QStringList depPlatResult;
        if (!query.evaluateTo(&depPlatResult))
        {
            qDebug() << "parserHafasXml::getJourneyData 10 - Query Failed";
        }

        query.setQuery("doc($path)/ResC/ConRes/ConnectionList/Connection[@id='" + resultIds[i] + "']/Overview/Arrival/BasicStop/Arr/Time/string()");
        QStringList arrTimeResult;
//.........这里部分代码省略.........