metadataengine/server/inc/mdsmanipulationengine.h
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/*
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* Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies). 
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:  This is Manipulation engine to manage adding,*
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*/
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#ifndef __MDSMANIPULATIONENGINE_H__
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#define __MDSMANIPULATIONENGINE_H__
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#include <e32base.h>
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#include "mdscommoninternal.h"
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#include "mdsgarbagecollector.h"
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// FORWARD DECLARATIONS
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class CMdSSchema;
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class CMdsSchema;
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class CMdSNotifier;
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class CMdSServerSession;
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class CMdSObjectLockList;
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class CMdCSerializationBuffer;
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class CMdSSqlObjectManipulate;
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// CONSTANT DECLARATION
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const TInt KGarbageCollectionDelay = 90; // 1,5 minutes
0
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// CLASS DECLARATION
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/**
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* CMdSManipulationEngine.
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*  Class for manipulating metadata database entries.
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*/
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class CMdSManipulationEngine : public CBase, public MMdSGarbageCollectorObserver
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    {
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    public: // Constructors and destructors
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        /**
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        * NewL.
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        * Two-phased constructor.
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        * @param aObjectManipulate pointer to object manipulator
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        * @return Pointer to created CMdSManipulationEngine object.
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        */
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        static CMdSManipulationEngine* NewL( CMdsSchema& aSchema, 
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            CMdSNotifier& aNotifier, CMdSObjectLockList& aLockList );
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        /**
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         * NewLC.
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         * Two-phased constructor.
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         * @param aObjectManipulate pointer to object manipulator
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         * @return Pointer to created CMdSManipulationEngine object.
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         */
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         static CMdSManipulationEngine* NewLC( CMdsSchema& aSchema,
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             CMdSNotifier& aNotifier, CMdSObjectLockList& aLockList );
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        /**
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        * ~CMdSManipulationEngine.
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        * Destructor.
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        */
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        virtual ~CMdSManipulationEngine();
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    public:
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		/** 
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		 * Adds object to DB from serialized buffer and put a result item IDs 
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		 * to result buffer 
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		 */
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		void AddL( CMdCSerializationBuffer& aBuffer, 
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				CMdCSerializationBuffer& aResultBuffer,
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				const CMdSServerSession* aServerSession );
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	    /** 
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	     * Removes items from the database
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	     * @param aBuffer serialized TMdCItemIds object
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	     * @param aSuccessfulBuffer successfully removed objects
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	     */
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	    void RemoveL( CMdCSerializationBuffer& aBuffer, 
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	    		CMdCSerializationBuffer& aSuccessfulBuffer );
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	    /** 
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	     * Updates items to database
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	     */
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	    void UpdateL( CMdCSerializationBuffer& aBuffer, 
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	    		CMdCSerializationBuffer& aResultBuffer );
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	    /**
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	     * Gets object id, object def and flags in serialization buffer.
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	     * @param aResultBufferSize size of result buffer
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	     * @param aUri object URI
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	     * @param aNamespaceDefId namespace id
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	     * 
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	     * @return serialization buffer that contains object id, object def id and object flags
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	     */
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		CMdCSerializationBuffer* CheckObjectL( TInt aResultBufferSize, 
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				const TDesC& aUri, TDefId aNamespaceDefId );
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		/**
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	     * Gets object def and flags in serialization buffer.
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	     * @param aResultBufferSize size of result buffer
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	     * @param aId object id
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	     * @param aNamespaceDefId namespace id
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	     * 
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	     * @return serialization buffer that contains object def id and object flags
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	     */
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		CMdCSerializationBuffer* CheckObjectL( TInt aResultBufferSize, 
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				TItemId aId, TDefId aNamespaceDefId );
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		/**
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	     * Gets object def and flags in serialization buffer.
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	     * @param aResultBufferSize size of result buffer
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	     * @param aIds list of object ids in serialization buffer
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	     * @param aNamespaceDefId namespace id
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	     * 
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	     * @return serialization buffer that contains object id, object def id and object flags for
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	     * all objects
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	     */
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		CMdCSerializationBuffer* CheckObjectL( TInt aResultBufferSize, 
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				CMdCSerializationBuffer& aIds, TDefId aNamespaceDefId );
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	    /**
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         * Give a reference to the manipulator object
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         */
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		CMdSSqlObjectManipulate& Manipulate();
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	    /**
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	     * Give a reference to the manipulator object
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	     */
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        CMdSGarbageCollector& GarbageCollector();
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		/**
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        * Add memory card media ID
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        * @param aMediaId Memory card's media ID
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        */
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		void AddMemoryCardL(TUint32 aMediaId);
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        /**
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        * Get the lastest memory card's media ID
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        * @param aMediaId Returned the latest memory card's media ID
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		* @leave KErrNotFound Not memory cards exist at all
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        */
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        void GetMemoryCardL(TUint32& aMediaId);
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        /**
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         * Checks if memory card's with given media ID exists
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         * @param aMediaId memory card's media ID
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         * @return memory card exists or not
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         */
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        TBool CheckMemoryCardL(TUint32 aMediaId);
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        /**
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         * Set media's media ID, drive and present state to DB.
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         * 
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         * @param aMediaId media ID
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         * @param aMediaId drive
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         * @param aMediaId present state
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         */
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        void SetMediaL(TUint32 aMediaId, TChar aDrive, TBool aPresentState);
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        /**
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         * Check if the media's with given media ID exist in DB and return 
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         * drive and present state.
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         * 
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         * @param aMediaId given media ID
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         * @param aMediaId drive
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         * @param aMediaId present state
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         * 
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         * @return does media exist
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         */
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        TBool GetMediaL(TUint32 aMediaId, TChar& aDrive, TBool& aPresentState);
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        /**
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         * Get present medias' media IDs and drives.
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         * 
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         * @param aMediaInfoBuffer buffer where media infos are written
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         * 
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         * @return present media count
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         */
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        TInt32 GetPresentMediasL(TDes8& aMediaInfoBuffer);
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        /**
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         * Sets files object to present state.
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         * @param aMediaId Memory card's media ID
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         * @param aFileCount File count
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         * @param aUris Files' URIs
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         * @param aFileInfos Files' file infos
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         * @param aResults TFilePresentStates results (casted to TUint8)
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         */
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        void SetFilesToPresentL(TUint32 aMediaId, TUint32 aFileCount, 
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        		CMdCSerializationBuffer& aUris, CMdCSerializationBuffer& aFileInfos,
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        		CMdCSerializationBuffer& aResults);
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        /**
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        * Sets all file objects which has given media ID to not present state.
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        * @param aMediaId Memory card's media ID
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        * @param aStartUp start up not present
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        */
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        void SetFilesToNotPresentL(TUint32 aMediaId, TBool aStartUp);
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        /**
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        * Removes all file objects which has given media ID and are in not 
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        * present.
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        *
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        * @param aMediaId Memory card's Media ID
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        * @param aStartUp start up not present
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        */
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        void RemoveFilesNotPresentL(TUint32 aMediaId, TBool aStartUp);
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   217
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		/**
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		 * Get schema version
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		 */
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		void GetSchemaVersionL(TInt& aMajorVersion, TInt& aMinorVersion);
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   222
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		/**
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		 * Set object to "present" state bu GUID
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		 * 
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		 * @leave KErrNotFound MdE can't find object in "not present" state 
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		 *                     with matching GUID
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		 */
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		void SetObjectToPresentByGuidL( 
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				const TInt64& aGuidHigh, const TInt64& aGuidLow );
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		/**
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		 * Change a path of a media object to another.
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		 * @param aOldPath old path
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		 * @param aNewPath new path
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		 */
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		void ChangePathL(const TDesC& aOldPath, const TDesC& aNewPath);
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		/**
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		 * Updates C drive media id for all objects with the old media id. 
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		 */
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		void ChangeMediaIdL();
3
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        /**
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         * Updates internal mass storage media id for all objects. 
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         */
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        void CheckMassStorageMediaIdL( const TUint32 aMediaId );
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0
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		/**
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		 * Adds new relation definition to the DB.
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		 * @param aNamespaceId namespace id
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		 * @param aRelationDefName name of the new relation def
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		 */
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		void AddRelationDefL( TDefId aNamespaceId, const TDesC& aRelationDefName );
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		/**
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		 * Adds new event definition to the DB.
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		 * @param aNamespaceId namespace id
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		 * @param aEventDefName name of the new event def
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		 */
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		void AddEventDefL( TDefId aNamespaceId, const TDesC& aEventDefName );
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		/**
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		 * Set the "pending" flag for objects. The pending flag means that composing to binary is 
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		 * pending for the object.
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		 * @param aObjectIds list of object ids
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		 */
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		void SetPendingL(const RArray<TItemId>& aObjectIds);
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		/**
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		 * Resets the "pending" flag for objects.
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		 * @param aObjectIds list of object ids.
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		 */
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		void ResetPendingL(const RArray<TItemId>& aObjectIds);
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		/**
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		 * Gets count of objects pending.
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		 * @param aObjectDefId type of objects
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		 * @return count of pending objects
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		 */
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		TInt GetPendingCountL( TDefId aObjectDefId );
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		/**
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		 * Gets ids of pending objects of type defined with aObjectDefId.
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		 * @param aObjectDefId objects definition id
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		 * @param aBufferSize max count of object ids in aObjectIds
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		 * @param aObjectIds on return contains ids of pending objects
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		 * 
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		 * @return 1 if there were more pending objects than could be appended to the array,
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		 * 	0 otherwise
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		 */
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		TInt GetPendingL( TDefId aObjectDefId, TInt aBufferSize, 
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				RArray<TItemId>& aObjectIds );
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21
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	      /**
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	         * Fetches object uris based on id array
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	         * @param aObjectIds list of object ids.
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	         * @param aObjectUris array for object uris.
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	         */
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		void GetObjectUrisByIdsL( const RArray<TItemId>& aObjectIds, 
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		                                         RPointerArray<HBufC>& aUriArray );
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0
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	protected:
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		TBool StartGarbageCollectionL();
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    private: // Constructors and destructors
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        /**
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        * CMdSManipulationEngine.
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        * C++ default constructor.
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        * @param .
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        */
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        CMdSManipulationEngine( CMdsSchema& aSchema, CMdSNotifier& aNotifier, 
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        		CMdSObjectLockList& aLockList );
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        /**
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        * ConstructL.
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        * 2nd phase constructor.
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        */
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        void ConstructL();
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   321
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    private: // Methods for own use
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    private: // Data
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       /**
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        * Object adding, removing and modification.
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        * Provides DB coding.
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        */
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    	CMdSSqlObjectManipulate* iManipulate;
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   331
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        /**
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        * Schema
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        */
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        CMdsSchema& iSchema;
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        /**
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        * Notifier
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        */
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        CMdSNotifier& iNotifier;
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		CMdSGarbageCollector* iGarbageCollector;
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   343
		
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		CMdSObjectLockList& iLockList;
41
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hgs
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		//For DB maintenance
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		TInt iAddedObjectsCount;
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		TInt iModifiedObjectsCount;
0
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	};
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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#endif //__MDSMANIPULATIONENGINE_H__