xmlstreamlint.cpp Example File

    /****************************************************************************
     **
     ** Portions Copyright (C) 2012 Research In Motion Limited.
     ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
     ** All rights reserved.
     ** Contact: Research In Motion Ltd. (http://www.rim.com/company/contact/)
     ** Contact: Nokia Corporation (qt-info@nokia.com)
     **
     ** This file is part of the examples of the BB10 Platform and is derived
     ** from a similar file that is part of the Qt Toolkit.
     **
     ** 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 Research In Motion, nor 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."
     **
     ****************************************************************************/

    #include "xmlstreamlint.hpp"

    #include <QtCore/QBuffer>
    #include <QtCore/QFile>
    #include <QtCore/QXmlStreamReader>
    #include <QtCore/QXmlStreamWriter>

    XmlStreamLint::XmlStreamLint(QObject *parent)
        : QObject(parent)
    {
    }

    void XmlStreamLint::checkXmlFile(const QString &fileName)
    {
        // Initialize the properties with some sane values
        m_result = tr("No syntax errors");
        emit resultChanged();

        m_output.clear();
        emit outputChanged();

        // Try to open the passed file and report an error if that doesn't work
        QFile file(fileName);
        if (!file.open(QIODevice::ReadOnly)) {
            m_result = tr("Couldn't open the file.");
            emit resultChanged();
            return;
        }

        // Create a memory buffer where we save the validated and reformatted XML document
        QByteArray outputData;
        QBuffer buffer(&outputData);
        buffer.open(QIODevice::WriteOnly);

        // Create a XML stream reader that reads the XML document from the file
        QXmlStreamReader reader(&file);

        // Create a XML stream reader that writes an XML document to the memory buffer
        QXmlStreamWriter writer(&buffer);

        // Now let the XML stream reader parse the XML document token by token ...
        while (!reader.atEnd()) {
            reader.readNext();

            // ... and update the result property if an error occurs ...
            if (reader.error()) {
                m_result = tr("Error: %1 in file %2 at line %3, column %4.\n")
                             .arg(reader.errorString(), fileName, QString::number(reader.lineNumber()), QString::number(reader.columnNumber()));
                emit resultChanged();

            } else {
                // ... otherwise let the XML stream writer write out this token
                writer.writeCurrentToken(reader);
            }
        }

        // Update the output property with the content of the memory buffer
        m_output = QString::fromUtf8(outputData);
        emit outputChanged();
    }

    QString XmlStreamLint::result() const
    {
        return m_result;
    }

    QString XmlStreamLint::output() const
    {
        return m_output;
    }