/*

* Copyright (c) 2006-2007 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:      XML SAX Parser for UPnP.

*

*/

#ifndef C_UPNPXMLPARSER_H_

#define C_UPNPXMLPARSER_H_

// INCLUDES

#include <e32base.h>

#include <xml/contenthandler.h>

// FORWARD DECLARATIONS

class CUpnpObject;

class CUPnPObjectStack; 

class CUpnpElement;

class CUpnpItem;

class CUpnpContainer;

using namespace Xml;

/**

 * XML SAX Parser for UPnP.

 *

 * @since s60 3.1

 * @lib upnpxmlparser.lib

 */

class CUPnPXMLParser :  public CBase,

                        public MContentHandler

    {

public:

    /**

     * 2-phased constructor.

     */

    IMPORT_C static CUPnPXMLParser* NewL();

    /**

     * 2-phased constructor.

     */

    IMPORT_C static CUPnPXMLParser* NewLC();

    /**

     * Destructor.

     */

    virtual ~CUPnPXMLParser();

public:

    /**

     * Parses xml data to the array of objects.

     * @param aResultArray, An array for objects in xml root.

     * @param aData, xml data.

     */

    IMPORT_C void ParseResultDataL( RPointerArray<CUpnpObject>& aResultArray,

        const TDesC8& aData );

    /**

     * Creates an xml document from a given item 

     *

     * @param aItem item to convert

     * @return xml document as a heap descriptor

     */

    IMPORT_C static HBufC8* ItemAsXmlLC( const CUpnpItem& aItem );

    /**

     * Creates an xml document from a given item, for CreateObject-action. 

     *

     * @param aItem item to convert

     * @return xml document as a heap descriptor

     */

    IMPORT_C static HBufC8* XmlForCreateObjectLC( const CUpnpItem& aItem );

    /**

     * Creates an xml document from a given item container

     *

     * @param aContainer container to convert

     * @return xml document as a heap descriptor

     */

    IMPORT_C static HBufC8* ContainerToXmlLC( 

                                    const CUpnpContainer& aContainer );

protected: // from MContentHandler

    /**

     * From MContentHandler.

     * @param aDocParam, not used.

     * @param aErrorCode, not used.

     */

    void OnStartDocumentL( const RDocumentParameters& aDocParam, 

                           TInt aErrorCode );

    /**

     * From MContentHandler.

     * @param aErrorCode, not used.

     */

    void OnEndDocumentL( TInt aErrorCode );

    /**

     * From MContentHandler.

     * @param aElement, holds the element info.

     * @param aAttributes, holds the element's attributes.

     * @param aErrorCode, if not KErrNone, the method is ignored.

     */

    void OnStartElementL( const RTagInfo& aElement, 

                          const RAttributeArray& aAttributes, 

                          TInt aErrorCode );

    /**

     * From MContentHandler.

     * @param aElement, holds the element info.

     * @param aErrorCode, if not KErrNone, the method is ignored.

     */

    void OnEndElementL( const RTagInfo& aElement, TInt aErrorCode );

    /**

     * From MContentHandler.

     * @param aBytes, The value of the content.

     * @param aErrorCode, if not KErrNone, the method is ignored.

     */

    void OnContentL( const TDesC8& aBytes, TInt aErrorCode );

    /**

     * From MContentHandler.

     * @param aPrefix, not used.

     * @param aUri, not used.

     * @param aErrorCode, not used.

     */    

    void OnStartPrefixMappingL( const RString& aPrefix, 

                                const RString& aUri, 

                                TInt aErrorCode );

    /**

     * From MContentHandler.

     * @param aPrefix, not used.

     * @param aErrorCode, not used.

     */

    void OnEndPrefixMappingL( const RString& aPrefix, TInt aErrorCode );

    /**

     * From MContentHandler.

     * @param aBytes, not used.

     * @param aErrorCode, not used.

     */

    void OnIgnorableWhiteSpaceL( const TDesC8& aBytes, TInt aErrorCode );

    /**

     * From MContentHandler.

     * @param aName, not used.

     * @param aErrorCode, not used.

     */

    void OnSkippedEntityL( const RString& aName, TInt aErrorCode );

    /**

     * From MContentHandler.

     * @param aTarget, not used.

     * @param aData, not used.

     * @param aErrorCode, not used. 

     */

    void OnProcessingInstructionL( const TDesC8& aTarget, 

                                   const TDesC8& aData, 

                                   TInt aErrorCode );

    /**

     * From MContentHandler.

     * @param aErrorCode

     */                               

    void OnError( TInt aErrorCode );

    /**

     * From MContentHandler.

     * @param aUid, not used.

     * @return None.

     */

    TAny* GetExtendedInterface( const TInt32 aUid );

private:

    /**

     * Constructor.

     */

    CUPnPXMLParser();

    /**

     * 2nd phase constructor.

     */

    void ConstructL();

private: 

    /**

     * Sets element's attributes to the object.

     *

     * @param aObject attributes will be set to this object

     * @param aAttributes attributes to set

     */

    void SetAttributesL( CUpnpObject& aObject, 

                         const RAttributeArray& aAttributes );

    /**

     * Set value to a element

     * 

     * @since Series 60 3.1

     * @param aItem (CUpnpObject&) a item which owns the element

     * @param aValue element value

     */

    void SetValueToElementL( CUpnpObject& aItem,

        const TDesC8& aValue );

    /**

     * Sets element's attributes to the element

     *

     * @param aElement attributes will be set to this element

     * @param aAttributes attributes to set

     */

    void SetAttributesL( const RAttributeArray& aAttributes ); 

    /**

     * Reset member for parse again.

     */

	void ResetMember();

private: // data

    /**

     * A pointer to result array from the client.

     * Not own.

     */      

    RPointerArray<CUpnpObject>* iResultRoot;

    /**

     * A stack for UPnP objects.

     * Own.

     */

    CUPnPObjectStack*           iStack;

    /**

     * Element value

     * Own.

     */

    HBufC8*                     iElementValue;

    /**

     * Upnp element

     * Owned until ownership is transferred for an object

     */

    CUpnpElement*               iNewElement;

    TBool                       iTitle;

    TBool                       iObjectClass;

    };

#endif // C_UPNPXMLPARSER_H_

// End of File