// Copyright (c) 2006-2009 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:

//

/**

 @file

 @internalTechnology

*/

#ifndef CMTPDATAPROVIDERCONTROLLER_H

#define CMTPDATAPROVIDERCONTROLLER_H

#include <e32base.h>

#include <ecom/ecom.h>

#include <mtp/mtpdataproviderapitypes.h>

#include "rmtpframework.h"

#include "mtpdebug.h"

#include <swi/sisregistrysession.h> 

#include <swi/sisregistryentry.h>

#include <swi/sisregistrypackage.h>

class CMTPDataProvider;

class CMTPDataProviderConfig;

/**

Implements the MTP framework data provider controller singleton. This is a 

container class responsible for loading, storing, and managing 

@see CMTPDataProviderPlugin instances and their associated 

@see CMTPDataProvider bindings. The ECOM framework is used to load data 

@see CMTPDataProviderPlugin instances when instructed to do so by the MTP 

framework, either on start-up or when a mode switch occurs. 

@internalTechnology

*/

class CMTPDataProviderController : public CActive

    {

public:

	/**

    The active data provider set enumeration states.

    */

    enum TEnumerationStates

        {

        EUnenumerated                       = 0,

        EEnumerationStarting                = 1,

        EEnumeratingFrameworkStorages       = 2,

        EEnumeratingDataProviderStorages    = 3,

        EEnumeratingFrameworkObjects        = 4,

        EEnumeratingDataProviderObjects     = 5,

        EEnumerated                         = 6,

        };

public:

    static CMTPDataProviderController* NewL();

    ~CMTPDataProviderController();    

    IMPORT_C void LoadDataProvidersL();

    IMPORT_C void UnloadDataProviders();

    IMPORT_C void NotifyDataProvidersL(TMTPNotification aNotification, const TAny* aParams);

    IMPORT_C void NotifyDataProvidersL(TUint aDPId, TMTPNotification aNotification, const TAny* aParams);

    IMPORT_C TUint Count();

    IMPORT_C CMTPDataProvider& DataProviderL(TUint aId);

    IMPORT_C CMTPDataProvider& DataProviderByIndexL(TUint aIndex);

    IMPORT_C TBool IsDataProviderLoaded(TUint aId) const;

    IMPORT_C TInt DeviceDpId();

    IMPORT_C TInt DpId(TUint aUid);

    IMPORT_C TInt ProxyDpId();

    IMPORT_C TUint EnumerateState();

    IMPORT_C TInt FileDpId();

    void EnumerationStateChangedL(const CMTPDataProvider& aDp);    

	TMTPOperationalMode Mode();

    IMPORT_C void WaitForEnumerationComplete();

    TBool FreeEnumerationWaiter();

private: // From CActive

    void DoCancel();

    void RunL();

    TInt RunError(TInt aError);

private:

    CMTPDataProviderController();

    void ConstructL();

    CMTPDataProviderConfig* CreateConfigLC(const TDesC& aResourceFilename);

    void EnumerateDataProviderObjectsL(TUint aId);

	TBool IsObjectsEnumerationNeededL(CMTPDataProvider& dp);

    void  LoadInstalledDataProvidersL(const CImplementationInformation* aImplementations);

    TBool LoadROMDataProvidersL(const TDesC& aResourceFilename, const RImplInfoPtrArray& aImplementations);

    TBool LoadDataProviderL(const TDesC& aResourceFilename);

    TInt  Uid(const TDesC& aResourceFilename, TUint& aUid);

    void Schedule();

    void CreateRegistrySessionAndEntryL();

    void CloseRegistrySessionAndEntryL();

    static void ImplementationsCleanup(TAny* aData);

    static TInt ImplementationsLinearOrderUid(const TUid* aUid, const CImplementationInformation& aObject);

    static TInt ImplementationsLinearOrderUid(const CImplementationInformation& aL, const CImplementationInformation& aR);

private: // Owned

    /**

    FLOGGER debug trace member variable.

    */

    __FLOG_DECLARATION_MEMBER_MUTABLE;

    /**

    The active data provider set container, ordered bit implementation 

    UID.

    */

    RPointerArray<CMTPDataProvider> iDataProviders;

    /**

    The active data provider identifier container, ordered by enumeration phase.

    */

    RArray<TUint>                   iDataProviderIds;

    /**

    The device data provider identifier.

    */

    TUint                           iDpIdDeviceDp;

    /**

    The proxy data provider identifier.

    */

    TUint                           iDpIdProxyDp;

    /**

    The file data provider identifier.

    */

    TUint                           iDpIdFileDp;

    /**

    The actively enumerating data providers.

    */

    RArray<TUint>                   iEnumeratingDps;

    /**

    The actively enumerating storage IDs.

    */

    RArray<TUint>                   iEnumeratingStorages;

    /**

    The active data provider set enumeration states.

    */

    TEnumerationStates              iEnumerationState;

    /**

    The active data provider set enumeration phases.

    */

    TUint                           iEnumerationPhase;

    /**

    The index used for iterating through the iDataProviderIds array.

    */

    TUint                           iDpIdArrayIndex;

    /**

    A general purpose index used for iterating through the active data provider

    set.

    */

    TUint                           iNextDpId;

    /**

    The framework singletons.

    */

    RMTPFramework                   iSingletons;

    /**

    Current operation mode

    */

    TMTPOperationalMode 			iMode ;

    /**

    Session for sisRegistry

    */

    Swi::RSisRegistrySession iSisSession;

    /**

    Registry Entry 

    */

    Swi::RSisRegistryEntry iSisEntry;

    /**

    Stub Found

    */

    TBool iStubFound;

    /**

    opensession waiter

    */

    CActiveSchedulerWait *iOpenSessionWaiter;

    /**

    Flag for Create DBSnapshot

    */

    TUint8 iFlagDb;

    };

#endif