inc/mdeharvestersession.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Thu, 19 Aug 2010 10:20:41 +0300
branchRCL_3
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/*
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* Copyright (c) 2007-2009 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:  Metadata engine Harverster Server client session*
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*/
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#ifndef __MDEHARVESTERSESSION_H__
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#define __MDEHARVESTERSESSION_H__
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#include <e32base.h>
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#include <badesca.h>
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#include <mdesession.h>
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#include "mdscommoninternal.h"
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class CMdESessionImpl;
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class CMdCSerializationBuffer;
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NONSHARABLE_CLASS(TGetPendingPgckWrapper)
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	{
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private:
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	TDefId iObjectDefId;
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public:
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	TPckgC<TDefId> iObjectDefIdPckg;
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	TPckg<TInt> iIdCountPckg;
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	TGetPendingPgckWrapper(TDefId aObjectDefId, TInt& aIdCount) : 
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		iObjectDefId(aObjectDefId), iObjectDefIdPckg(iObjectDefId), 
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		iIdCountPckg(aIdCount)
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		{
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		}
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	TInt GetIdCount()
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		{
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		return iIdCountPckg();
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		}
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	};
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/**
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 * Metadata Engine Harvester Server session.
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 */
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NONSHARABLE_CLASS(CMdEHarvesterSession) : public CBase
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	{
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public:
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	/* Constructors and destructor. */
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	/**
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	 * Opens a new metadata engine harvester server session.
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	 *
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	 * @param aObserver  observer to notify when opening the session has been 
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	 *                   completed
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	 *
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	 * @return  metadata engine session
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	 */
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	IMPORT_C static CMdEHarvesterSession* NewL(CMdESession& aSession);
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	/**
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	 * Opens a new metadata engine harvester server session and leaves the 
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	 * session in the cleanup stack.
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	 *
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	 * @param aObserver  observer to notify when opening the session has been 
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	 *                   completed
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     *
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	 * @return  metadata engine session
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	 */
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	IMPORT_C static CMdEHarvesterSession* NewLC(CMdESession& aSession);
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	/**
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	 * Destructor.
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	 */
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	~CMdEHarvesterSession();
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	IMPORT_C void SetSession( CMdESession& aSession );
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	IMPORT_C CMdESession& SessionRef();
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	// DEPRICATED
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	IMPORT_C CMdESession* Session();
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	/**
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	 * Add memory card with given media ID and current time. If memory card 
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	 * already exist only time is updated to current time.
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	 * 
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	 * @param memory card's media ID
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	 */
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	IMPORT_C void AddMemoryCard(TUint32 aMediaId);
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	/**
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	 * Get latest memory card's media ID.
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	 * @param returned memory card's media ID
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	 * @return EFalse if there is no any memory cards added
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	 */
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	IMPORT_C TBool GetMemoryCard(TUint32& aMediaId);
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    /**
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	 * Check if there is memory card with given media ID already in DB.
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	 * 
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	 * @param memory card's media ID
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	 * @param returned boolean if memory card exists or not
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	 * 
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	 * @return EFalse if there was error
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	 * 
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     * @depricated
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	 */
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	IMPORT_C TBool CheckMemoryCard(TUint32 aMediaId, TBool& aExist);
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	/**
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	 * Set media's media ID, drive and present state.
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	 * 
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	 * @param aMediaId media's media ID
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	 * @param aDrive media's drive
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	 * @param aPresentState media's present state
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	 */
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	IMPORT_C void SetMediaL(TUint32 aMediaId, TChar aDrive, 
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			TBool aPresentState);
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	/**
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	 * Get media's drive and present state by media ID.
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	 * 
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	 * @param aMediaId media's media ID
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	 * @param aDrive returned media's drive
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	 * @param aPresentState returned media's present state
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	 * @return EFalse if there is no media with matching media ID in DB
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	 */
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	IMPORT_C TBool GetMediaL(TUint32 aMediaId, TChar& aDrive, 
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			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 aMedias returned present medias' media IDs and drives
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	 */
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	IMPORT_C void GetPresentMediasL(RArray<TMdEMediaInfo>& aMedias);
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    /**
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     * Set file to present state.
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     * 
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     * @param aMediaId file's media ID
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     * @param aUri file's URI
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     * @param aFileInfo file's modified date and byte size
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     *
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     * @return ETrue if file existed and changing to present state was 
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     *               successful
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     * 
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     * @depricated
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     */
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	IMPORT_C TBool SetFileToPresent(TUint32 aMediaId, const TDesC& aUri, 
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	                               TMdSFileInfo& aFileInfo);
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	/**
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	 * Set files to present state.
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	 * 
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	 * @param aMediaId file's media ID
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	 * @param aUris files' URIs
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	 * @param aFileInfos files' modified dates and byte sizes
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	 * @param aResults Values from TFilePresentStates
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	 */
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	IMPORT_C void SetFilesToPresentL(TUint32 aMediaId, 
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			const RArray<TPtrC>& aUris,
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			const RArray<TMdSFileInfo>& aFileInfos, 
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			RArray<TFilePresentStates>& aResults);
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    /**
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     * Set all files, which media ID is given, to not present or start up not 
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     * present state.
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     *
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     * @param aMediaId memory card's media ID
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     * @deprecated
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     */
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	IMPORT_C void SetFilesToNotPresent(TUint32 aMediaId);
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    /**
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     * Remove all objects, which are in not present state, with given media ID
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     * 
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     * @param aMediaId memory card's media ID
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     * @deprecated
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     */
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	IMPORT_C void RemoveFilesNotPresent(TUint32 aMediaId);
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	/**
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     * Set all files, which media ID is given, to not present state.
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     * If aMediaId is 0, call is silently ignored.
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     *
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     * @param aMediaId memory card's media ID
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     * @param aStartUp is start up or normal mount
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     */
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	IMPORT_C void SetFilesToNotPresent(TUint32 aMediaId, TBool aStartUp);
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    /**
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     * Remove all objects, which are in not present state, with given media ID.
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     * 
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     * @param aMediaId memory card's media ID
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     * @param aStartUp is start up or normal mount
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     */
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	IMPORT_C void RemoveFilesNotPresent(TUint32 aMediaId, TBool aStartUp);
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	/**
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	 * Create global harvester prioritization chunk and set it to MdE Server. 
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	 * There can be only one chunk and observer at once. If MdE Server already 
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	 * contains active observer, old observer completes with KErrAbort, chunk 
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	 * is always changed to this new one. Observer is added using 
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	 * DoAddHarvestingPrioritizationObserver.
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	 *
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     * @param aSize   the size of global chunk that will receive object 
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     *                URIs which need to be prioritize
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	 */
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	IMPORT_C void SetHarvestingPrioritizationChunkL( TInt aSize );
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	/**
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	 * Add harvester prioritization observer to MdE Server. There can be 
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	 * only one chunk and observer at once. If MdE Server already contains 
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	 * active observer, aStatus completes with KErrAlreadyExists. When MdE 
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	 * Server needs prioritize object, aStatus completes with KErrNone.
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	 *
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     * @param aStatus the asynchronous response status which is changed 
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     *                when there is object URIs to be prioritize
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	 */
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	IMPORT_C void AddHarvestingPrioritizationObserver(TRequestStatus& aStatus);
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	/**
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	 * Cancel harvester prioritization observer from MdE Server. 
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	 *
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	 * @return If MdE Server doesn't have outstanding observer method 
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	 *         returns KErrNotFound, otherwise KErrNone is returned.
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	 */
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	IMPORT_C TInt CancelHarvestingPrioritizationObserver();
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	/**
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	 * Return harvester prioritization URI count. Data is valid only after 
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	 * AddHarvestingPrioritizationObserver aStatus is completed.
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	 *
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	 * @return harvester prioritization URI count
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	 */
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	IMPORT_C TInt HarvestingPrioritizationUriCountL();
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	/**
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	 * Return harvester prioritization URI from index aIndex. Data is valid 
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	 * only after AddHarvestingPrioritizationObserver aStatus is completed.
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	 *
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	 * @return harvester prioritization URI, ownership is transfered to caller
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	 */
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	IMPORT_C HBufC* HarvestingPrioritizationUriL( TInt aIndex );
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	/**
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	 * Objects are left locked automatically after those are added to DB. Only 
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	 * properties and freetexts can be modified after those objects are added 
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	 * to DB. Objects' locking must be removed by commiting those to DB or 
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	 * canceling object.
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	 *
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	 * @param aObjects Array of object to be auto locked after adding
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	 */
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	IMPORT_C void AutoLockL( RPointerArray<CMdEObject>& aObjects );
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	/**
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	 * Change path of objects.
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	 * 
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	 * @param aOldPath old path
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	 * @param aNewPath new path
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     * @param aStatus the asynchronous response status which is changed when 
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     *                URIs are changed
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	 */
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	IMPORT_C void ChangePath( const TDesC& aOldPath, const TDesC& aNewPath,
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			TRequestStatus& aStatus );
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	/**
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	 * Update current C-drive media id to all objects in DB that have the old media id.
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	 */
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	IMPORT_C void ChangeCDriveMediaId();
0
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	/**
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	 * Set "binary composing to file" pending flag to objects
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	 *
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	 * @param aObjectId object IDs
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	 */
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	IMPORT_C void SetPendingL( const RArray<TItemId>& aObjectIds );
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	/**
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	 * Reset "binary composing to file" pending flag from objects
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	 *
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	 * @param aObjectId object IDs
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	 */
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	IMPORT_C void ResetPendingL( const RArray<TItemId>& aObjectIds );
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	/**
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	 * Get count of objects with "binary composing to file" pending flag
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	 *
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	 * @param aObjectDef object definition which limits what objects are
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	 *                   returned or NULL when all objects are returned
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	 * 
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	 * @return count of objects
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	 */
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	IMPORT_C TInt GetPendingCount( const CMdEObjectDef* aObjectDef );
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	/**
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	 * Get objects with "binary composing to file" pending flag
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	 *
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	 * @param aObjectDef object definition which limits what objects are
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	 *                   returned or NULL when all objects are returned
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	 * @param aObjectIdCount count of returned object IDs
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	 * @param aObjectIdBuffer serialized buffer of returned object IDs
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	 *
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	 * @return If returned value is > 0, buffer is not large enough for 
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	 * 		    objects ID from DB, otherwise error code is returned.
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	 */
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	IMPORT_C TInt GetPending( 
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			const CMdEObjectDef* aObjectDef, TInt& aObjectIdCount, 
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			CMdCSerializationBuffer& aObjectIdBuffer );
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	/**
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	 * Reset DB
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	 * only for internal use (works in DEBUG ONLY!!)
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	 */
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	IMPORT_C void ResetDBL();
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3
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	/**
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	 * Update DB with current internal mass storage media id
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	 */
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	IMPORT_C void CheckMassStorageMediaId( const TUint32 aMediaId );
3
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0
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private:
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	CMdESessionImpl* iSession;
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	RChunk iHarvestingPrioritizationChunk;
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	CMdCSerializationBuffer* iHarvestingPrioritizationSerializationBuffer;
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protected:
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	/* Constructors. */
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	/**
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	 * Constructor.
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	 */
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	CMdEHarvesterSession(CMdESession& aSession);
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	/**
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	 * Second-phase constructor.
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	 */
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	void ConstructL();
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	};
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#endif  // __MDEHARVESTERSESSION_H__