/*

* Copyright (c) 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:  Meta data Access Singleton

*

*/

#ifndef CMMMTPDPACCESSSINGLETON_H

#define CMMMTPDPACCESSSINGLETON_H

class CMmMtpDpMetadataAccessWrapper;

class MMTPDataProviderFramework;

class CMmMtpDpAccessSingleton : public CObject

    {

public:

    /**

     * Create Singleton instance

     * need Release(), if no use

     * @param aRFs RFs reference

     * @param aFramework framework reference

     */

    IMPORT_C static void CreateL( MMTPDataProviderFramework& aFramework );

    /**

     * release singleton instance

     */

    IMPORT_C static void Release();

    /**

     * get metadata access wrapper reference

     */

    IMPORT_C static CMmMtpDpMetadataAccessWrapper& GetAccessWrapperL();

    /**

     * do some special process with assess DBs when receives opensession command

     */

    IMPORT_C static void OpenSessionL();

    /**

     * do some special process with assess DBs when receives closesession command

     */

    IMPORT_C static void CloseSessionL();

    /**

     * Issue ActiveToIdle Status Change (ActiveObject)

     * this function is to be called after an MTP operation is finish to change status from Active to Idle

     * observer of the status might not get the notification if idle->active->idle happens in one synchronous operation 

     */

    IMPORT_C static void ActiveToIdleStatusChange();

    /**

     * Cancel Outstanding ActiveToIdle Status Change

     */

    IMPORT_C static void CancelActiveToIdleStatusChange();

private:

    /*

     * get singleton instance, for internal use

     */

    static CMmMtpDpAccessSingleton* Instance();

    /*

     * 2-phase construction

     */

    static CMmMtpDpAccessSingleton* NewL( MMTPDataProviderFramework& aFramework );

    /*

     * 2-phase construction

     */

    void ConstructL( MMTPDataProviderFramework& aFramework );

    /*

     * destruction

     */

    ~CMmMtpDpAccessSingleton();

    /**

     * get DelayStatusChanger instance, internal use only

     */

    static CIdle* DelayStatusChanger();

    /**

     * Perform actural ActiveToIdle Status Change after active object callback

     */

    static TInt DoActiveToIdleStatusChange(TAny* Any);

private:

    CMmMtpDpMetadataAccessWrapper* iWrapper;

    CIdle* iDelayStatusChanger;

    };

#endif // CMMMTPDPACCESSSINGLETON_H