/**

* Copyright (c) 2010 Sasken Communication Technologies Ltd.

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the "{License}"

* which accompanies  this distribution, and is available

* at the URL "{LicenseUrl}".

*

* Initial Contributors:

* Narasimhulu Kavadapu, Sasken Communication Technologies Ltd - Initial contribution

*

* Contributors:

* Siddhartha Chandra, Sasken Communication Technologies Ltd

* Description:

* XML Parser class

*/

#ifndef FB_XML_HANDLER_H

#define FB_XML_HANDLER_H

#include <QObject>

#include <QString>

#include <QXmlDefaultHandler>

#include <QVariantList>

#include "authAppConstants.h"

// FORWARD DECLARATIONS

class FBRequest;

///////////////////////////////////////////////////////////////////////////////////////////////////

class FBXMLHandler : public QObject, public QXmlDefaultHandler

{

    Q_OBJECT

private:

    QVariantList        iStack;

    QList<QString>      iNameStack;

    QVariant            iRootObject;

    QString             iRootName;

    QString             iChars;

    QString         iParseErrorMessage;

    bool            iError;

public: /* class functions */

    FBXMLHandler();

    ~FBXMLHandler();

    inline const QString& rootName() const { return iRootName; }

    inline QVariant rootObject() const { return iRootObject; }

    inline bool parseError() const { return iError; }

private:

    /* methods from QXmlDefaultHandler */

    bool startElement( const QString & namespaceURI,

                       const QString & localName,

                       const QString & qName,

                       const QXmlAttributes & atts);

    bool characters(const QString& text);

    bool endElement( const QString & namespaceURI,

                     const QString & localName,

                     const QString & qName );

    /* methods from QXmlErrorHandler */

    bool error(const QXmlParseException& exception);

    bool fatalError(const QXmlParseException& exception);

    /* private functions*/

    const QString& topName() const;

    void flushCharacters();

    QVariant topObject(bool aCreate);

    QVariant topContainer();

    void initWhiteSpaceHash();

    QHash<QChar, bool> iWhiteSpaceAndNewLineCharSet;

};

#endif // FB_XML_HANDLER_H