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#include <QtCore/QFileInfo>

#include <QtCore/QDir>

#include <QtCore/QVector>

#include <QtXmlPatterns/QSimpleXmlNodeModel>

class FileTree : public QSimpleXmlNodeModel

{

 public:

    FileTree(const QXmlNamePool &namePool);

    QXmlNodeModelIndex nodeFor(const QString &fileName) const;

    //! [0]

    virtual QXmlNodeModelIndex::DocumentOrder compareOrder(const QXmlNodeModelIndex&, const QXmlNodeModelIndex&) const;

    virtual QXmlName name(const QXmlNodeModelIndex &node) const;

    virtual QUrl documentUri(const QXmlNodeModelIndex &node) const;

    virtual QXmlNodeModelIndex::NodeKind kind(const QXmlNodeModelIndex &node) const;

    virtual QXmlNodeModelIndex root(const QXmlNodeModelIndex &node) const;

    virtual QVariant typedValue(const QXmlNodeModelIndex &node) const;

    //! [0]

 protected:

    //! [1]

    virtual QVector<QXmlNodeModelIndex> attributes(const QXmlNodeModelIndex &element) const;

    virtual QXmlNodeModelIndex nextFromSimpleAxis(SimpleAxis, const QXmlNodeModelIndex&) const;

    //! [1]

 private:

    //! [4]

    enum Type {

        File,

        Directory,

        AttributeFileName,

        AttributeFilePath,

        AttributeSize,

        AttributeMIMEType,

        AttributeSuffix

    };

    //! [4]

    inline QXmlNodeModelIndex nextSibling(const QXmlNodeModelIndex &nodeIndex,

                                          const QFileInfo &from,

                                          qint8 offset) const;

    inline const QFileInfo &toFileInfo(const QXmlNodeModelIndex &index) const;

    inline QXmlNodeModelIndex toNodeIndex(const QFileInfo &index,

                                          Type attributeName) const;

    inline QXmlNodeModelIndex toNodeIndex(const QFileInfo &index) const;

    /*

     One possible improvement is to use a hash, and use the &*&value()

     trick to get a pointer, which would be stored in data() instead

     of the index.

    */

    //! [2]

    mutable QVector<QFileInfo>  m_fileInfos;

    const QDir::Filters         m_filterAllowAll;

    const QDir::SortFlags       m_sortFlags;

    QVector<QXmlName>           m_names;

    //! [2]

};

    //! [3]

    //! [3]