/*

* Copyright (c) 2002 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: 

*     Abstract base class for logs model.

*

*/

#ifndef __CLogsModel_H_

#define __CLogsModel_H_

//  INCLUDES

#include <e32base.h>

#include <f32file.h>

#include "MLogsModel.h"

#include "MLogsObserver.h"

#include "MLogsStateHolder.h"

#include "TLogsEventStrings.h"

// MACROS

// DATA TYPES

// FUNCTION PROTOTYPES

// FORWARD DECLARATIONS

class MLogsStateHolder;

class MLogsEvent;

class MLogsReader;

class MLogsEventWrapper;

class MLogsEventArray;

class CLogsEngine;

// CLASS DECLARATION

/**

 *	Defines abstract interface for Logs model

 */

class CLogsModel :  public CBase,

                    public MLogsModel,

                    public MLogsObserver,

                    public MLogsStateHolder

    {

    public:

        /**

         * EPOC constructor. 

         *

         * @param aFsSession   ref. to file server session

         * @param aModel model type

         * @param aStrings     log client constants

         * @return model object

         */

        static CLogsModel* NewL( RFs& aFsSession, TLogsModel aModel,

                            TLogsEventStrings& aStrings, CLogsEngine* aLogsEngine );

        /**

         *  Destructor

         */

        ~CLogsModel();

    private:

        /**

         * EPOC constructor. 

         */

        void ConstructL();

        /**

         * C++ constructor. 

         *

         * @param aFsSession   ref. to file server session

         * @param aModel model type

         * @param aStrings     log client constants

         */

        CLogsModel( RFs& aFsSession, 

                    TLogsModel aModel, 

                    TLogsEventStrings& aStrings, 

                    CLogsEngine* aLogsEngineRef );

    private:

    public: // from MLogsModel

		void Delete( TInt aIndex );

        TInt Count();

        const MLogsEventGetter* At( TInt aIndex );

        void SetObserver( MLogsObserver* aObserver );

        void DoActivateL( TDoActivate aDoActivate );  

        void DoDeactivate( TClearMissedCalls aClearMissedCalls,

                           TDoDeactivate aDisconnectDb  );  

        void Reset();

        void ConfigureL( const MLogsReaderConfig* aConfig );

        void KickStartL( TBool aReset );

    public: // from MLogsStateHolder

        TLogsState State() const;

    public: // from MLogsObserver

        void StateChangedL( MLogsStateHolder* aHolder );

    private: // data

        /// Ref: File server session

        RFs& iFsSession;

        /// Own: model type

        TLogsModel iModel;

        /// Ref: log strings

        TLogsEventStrings& iStrings;

        /// Own: Event array

        MLogsEventArray* iEventArray;

        /// Own: MLogsReader

        MLogsReader* iReader;

        /// Own: wrapper for CLogsGetEvent

        MLogsEventWrapper* iWrapper;

        /// Ref: Observer

        MLogsObserver* iObserver;

        /// own: state for observer

        TLogsState      iState;

        /// Ref: Log db engine        

        CLogsEngine* iLogsEngineRef;         

    };

#endif

// End of File  __CLogsModel_H_