/*

* Copyright (c) 2010 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: MediaIdUpdater

*

*/

#ifndef MEDIAIDUPDATER_H

#define MEDIAIDUPDATER_H

#include <string>

#include <set>

namespace java

{

namespace storage

{

    class JavaStorage;

}

namespace backup

{

/**

* MediaIdUpdater is responsible for ensuring that java storage contains

* valid media ids after restore.

* Media id may change in following situations:

*   - memory card is formatted between backup and restore

*   - another memory card is used during restore than originally

*/

class MediaIdUpdater

{

public:

    MediaIdUpdater();

    virtual ~MediaIdUpdater();

    /**

    * Updates media ids to valid values if needed

    * Note: this method must be called after java storage is restored

    */

    virtual void update();

protected:

    virtual std::set<std::wstring> getPresentMediaIds();

    virtual std::set<std::wstring> getPresentRemovableDriveMediaIds();

    virtual std::set<std::wstring> removePresentMediaIds(const std::set<std::wstring>& aStorageIds,

                                                         const std::set<std::wstring>& aPresentIds);

    virtual bool isMediaIdUpdateNeeded(const std::set<std::wstring>& aInvalidIds,

                                       const std::set<std::wstring>& aValidIds);

    virtual std::set<std::wstring> getMediaIdsFromStorage();

    virtual void updateMediaIds(const std::set<std::wstring>& aInvalidIds,

                                const std::set<std::wstring>& aValidIds);

    virtual void open();

    virtual void close();

    java::storage::JavaStorage* mStorage;

};

} // namespace backup

} // namespace java

#endif // MEDIAIDUPDATER_H