/*

* Copyright (c) 2007-2009 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:

*

*/

#ifndef CPOSSINGLETONMANAGER_H

#define CPOSSINGLETONMANAGER_H

#include <e32base.h>

// Singleton object ID.

enum {

    EPosSigletonObjectIdPsyFixStateManager   = 1,

    EPosSigletonObjectIdPsyListHandlerId     = 2,

    EPosSigletonObjectConstManagerId         = 3, 

    EPosSigletonObjectExtGpsMonitorId        = 4

    };

/**

* The CPosSingletonManager manages all singleton objects of default proxy. 

* Each singleton object must have a unique ID. This ID is not allocated

* by this class. The singleton class itself must guarentee that the ID

* is unique within the DLL.

*

* Usage:

*

* @code

* @endcode

*/

class CPosSingletonManager : public CBase

    {

    public: // Constructors and destructor

        /**

        * Destructor.

        */

        ~CPosSingletonManager();

    public: // Functions from base classes

        /**

        * Get the singleton object. This function 

        * returns NULL if the object is not set before.

        *

        * @param aObjectId The ID of the singleton object.

        * @return The pointer to the singleton ojbect. NULL

        * if the object has not been set.

        */

        static CBase* GetObject( TInt aObjectId );

        /**

        * Set the singleton object. This function

        * panics in debug mode if the object has been set.

        *

        * @param aObject The pointer to the object. NULL will

        * clear the object.

        * @param aObjectId The id of the object. 

        */

        static void SetObjectL( 

            CBase* aObject,

            TInt aObjectId );

        /**

        * Release the singleton object. 

        *

        * @param aObjectId The id of the object. 

        */

        static void ReleaseObject(

            TInt aObjectId );

    private:

        /**

        * Get instance of singleton manager.

        */

        static CPosSingletonManager* GetInstanceL();

        /**

        * Get instance of the singleton manager. This function

        * returns NULL if the singleton manager has not be 

        * constructed.

        */

        static CPosSingletonManager* GetInstance();

        /**

        * C++ default constructor.

        */

        CPosSingletonManager();

        /**

        * Get a object

        */

        CBase* GetAObject( TInt aObjectId );

        /**

        * Release a object

        */

        void ReleaseAObject( TInt aObjectId );

        /**

        * Set a object

        */

        void SetAObjectL(

            CBase* aObject,

            TInt aObjectId );

        /**

        * Check if the singleton manager object shall be cleard.

        * When there is no sigleton object stored, then this object

        * shall be cleared

        */

        void ClearIfNeeded();

        // By default, prohibit copy constructor

        CPosSingletonManager(const CPosSingletonManager&);

        // Prohibit assigment operator

        CPosSingletonManager& operator= (const CPosSingletonManager&);

    private: // Data

        //Struct defination for singleton object

        struct TSingletonOb

            {

            CBase* iObject;

            TInt iObjectId;

            };

        //Objects array    

        RArray< TSingletonOb > iObjectsArray;

    };

#endif      // CPOSSINGLETONMANAGER_H  

// End of File