/** @file

* Copyright (c) 2007 Nokia Corporation and/or its subsidiary(-ies). 

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies  this distribution, and is available 

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:  Declares the CUpnpSingleTagContentHandler class

*

*/

#ifndef __UPNPSINGLETAGCONTENTHANDLER_H__

#define __UPNPSINGLETAGCONTENTHANDLER_H__

#include "upnpcontenthandler.h"

using namespace Xml;

/**

*  This class handles single tag of xml subtree. It stores name of tag, and value found inside

*  in descriptors passed to it. It allows only single level values and ignores any tag inside.

*  <acceptedtag>

*  acceptedValue<ignoredtag1 \><ignoredtag2>ignoredValue (inside ignoredtag)</ignoredtag2>

*  </acceptedtag>

*  It is designed to be used by upnp controler that delegates to it events from xml sax parser

*

*/

NONSHARABLE_CLASS( CUpnpSingleTagContentHandler ) : public CUpnpContentHandler

{

public:

    /**

    * Two-phased constructor

    * @param aControler controler of parsing process

    * @param aTagName out parameter where name of found tag will be stored

    * @param aValue out patameter where value found inside tag will be stored

    * @return instance of CUpnpSingleTagContentHandler class

    */

    static CUpnpSingleTagContentHandler* NewL(

            CUpnpContentHandlersController& aController,

            RBuf8& aTagName, RBuf8& aValue );

    /**

    * Two-phased constructor. Leaves the object on CleanupStack

    * @param aControler controler of parsing process

    * @param aTagName out parameter where name of found tag will be stored

    * @param aValue out patameter where value found inside tag will be stored

    * @return instance of CUpnpSingleTagContentHandler class

    */

    static CUpnpSingleTagContentHandler* NewLC(

            CUpnpContentHandlersController& aController,

            RBuf8& aTagName, RBuf8& aValue );

    /**

    * Destructor of CUpnpSingleTagContentHandler class

    *

    */

    virtual ~CUpnpSingleTagContentHandler();

public:	// from CUpnpContentHandler

    /**

    * This method is a callback to indicate an element has been parsed.

    * @param				aElement is a handle to the element's details.

    * @param				aAttributes contains the attributes for the element.

    */

    virtual void OnStartElementL( const RTagInfo& aElement,

                                  const RAttributeArray& aAttributes );

    /**

    * This method is a callback to indicate the end of the element has been reached.

    * @param              aElement is a handle to the element's details.

    */

    virtual void OnEndElementL( const RTagInfo& aElement );

    /**

    * This method is a callback that sends the content of the element.

    * @param              aBytes is the raw content data for the element in one chunk

    */

    virtual void OnContentL( const TDesC8& aBytes );

    /**

     * Returns value if class is interested in tags all namespaces

     *

     * @return ETrue when the class is interested in tags in all namespaces

     */

    virtual TBool InterestedInAllNamespaces();

protected:

    /**

    * Default C++ constructor

    */

    CUpnpSingleTagContentHandler( CUpnpContentHandlersController& aController,

        RBuf8& aTagName, RBuf8& aValue );

public:

    /**

     * Copy bytes from aSrc to aDest, and realloc aDest if its length is too less.

     * @param aDest descriptor to make copy to

     * @param aSrc data to copy

     */

    static void SafeCopyL( RBuf8& aDest, const TDesC8& aSrc );

private:

    //not owned

    RBuf8& iTagName;

    //not owned

    RBuf8& iValue;

    TBool iIsInsideOfTag;

};

#endif //__UPNPSINGLETAGCONTENTHANDLER_H__