/*

* Copyright (c) 2006 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:   Contains CNcdNodeDownloadProxy class

*

*/

#ifndef C_NCD_NODE_DOWNLOAD_PROXY_H

#define C_NCD_NODE_DOWNLOAD_PROXY_H

// For the streams

#include <s32mem.h>

#include "ncdinterfacebaseproxy.h"

#include "ncdnodedownload.h"

class CNcdNodeMetadataProxy;

/**

 *  This class implements the functionality for the

 *  MNcdNodeDownload interfaces. The interface is provided for

 *  API users.

 *

 *  @since S60 v3.2

 */

class CNcdNodeDownloadProxy : public CNcdInterfaceBaseProxy, 

                              public MNcdNodeDownload

    {

public:

    /**

     * @param aSession The session between the client proxy and the

     * corresponding server object.

     * @param aHandle The handle which identifies the server object

     * that this proxy uses.

     * @param aMetadata Owns and uses the information of this proxy.

     * The proxy also keeps track of the refence counts of its objects. 

     * And handles the deletion of these objects when the total reference 

     * count reaches zero.

     * @return CNcdNodeDownloadProxy* Pointer to the created object 

     * of this class.

     */

    static CNcdNodeDownloadProxy* NewL(

        MCatalogsClientServer& aSession,

        TInt aHandle,

        CNcdNodeMetadataProxy& aMetadata );

    /**

     * @param aSession The session between the client proxy and the

     * corresponding server object.

     * @param aHandle The handle which identifies the server object

     * that this proxy uses.

     * @param aMetadata Owns and uses the information of this proxy.

     * The proxy also keeps track of the refence counts of its objects. 

     * And handles the deletion of these objects when the total reference 

     * count reaches zero.

     * @return CNcdNodeDownloadProxy* Pointer to the created object 

     * of this class.

     */

    static CNcdNodeDownloadProxy* NewLC(

        MCatalogsClientServer& aSession, 

        TInt aHandle,

        CNcdNodeMetadataProxy& aMetadata );

    /**

     * Destructor.

     * The destructor is set public. So, the node that owns the Download may

     * delete it directly when the reference count of the node reaches zero

     * and the destructor of the node is called.

     */

    virtual ~CNcdNodeDownloadProxy();

    /**

     * @return CNcdNodeMetadataProxy& Gives the proxy that owns this class object.

     */

    CNcdNodeMetadataProxy& Metadata() const;

    /**

     * Gets the data for descriptors from the server side. This function is

     * called to update proxy data. The function uses the protected virtual

     * internalize functions. So, the child classes may provide their own

     * implementations for internalizations of certain metadata.

     */

    void InternalizeL();

public: // MNcdNodeDownload

    /**

     * @see MNcdNodeDownload::IsDownloadedL

     */

    virtual TBool IsDownloadedL() const;

    /**

     * @see MNcdNodeDownload::DownloadContentL

     */

    virtual MNcdDownloadOperation* DownloadContentL( 

        MNcdDownloadOperationObserver& aObserver );

protected:

    /**

     * Constructor

     *

     * @param aSession The session between the client proxy and the

     * corresponding server object.

     * @param aHandle The handle which identifies the server object

     * that this proxy uses.

     * @param aMetadata Owns and uses the information of this proxy.

     * The proxy also keeps track of the refence counts of its objects. 

     * And handles the deletion of these objects when the total reference 

     * count reaches zero.

     * @return CNcdNodeDownloadProxy* Pointer to the created object 

     * of this class.

     */

    CNcdNodeDownloadProxy(

        MCatalogsClientServer& aSession,

        TInt aHandle,

        CNcdNodeMetadataProxy& aMetadata );

    /**

     * ConstructL

     */

    virtual void ConstructL();

    // These functions are used to update the data of this class object

    /**

     * @param aStream This stream will contain all the data content for

     * this class object. The stream is gotten from the server side. The

     * memeber variables will be updated according to the data from

     * the stream. 

     */

    virtual void InternalizeDataL( RReadStream& aStream );

private:

    // Prevent if not implemented

    CNcdNodeDownloadProxy( const CNcdNodeDownloadProxy& aObject );

    CNcdNodeDownloadProxy& operator =( const CNcdNodeDownloadProxy& aObject );

private: // data

    CNcdNodeMetadataProxy& iMetadata;

    TBool iIsDownloaded;    

    };

#endif // C_NCD_NODE_DOWNLOAD_PROXY_H