/*

* Copyright (c) 2005-2009 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 CPOSITIONERREGISTRY_H

#define CPOSITIONERREGISTRY_H

#include <e32base.h>

// FORWARD DECLARATIONS

class MPosStatusObserver;

class MPosParameterObserver;

class MPositionerStatus;

class CPosPsyExtension;

// CLASS DECLARATION

/**

* Class used to keep track of all CPositioner instances. All such instances 

* should register/de-register themselves once to this class.

* 

*/

class CPositionerRegistry : public CBase

    {

    public:  // Constructors and destructor

        /**

        * Singleton constructor.

        *

        * @param aImplementationUid PSY implementation UID

        * @return the one and only CPositionerRegistry instance.

        */

        static CPositionerRegistry* InstanceL(

        /* IN  */       MPosStatusObserver* aStatusObserver

        );

        /**

        * Singleton destructor.

        *

        * @param aImplementationUid PSY implementation UID

        */

        void Release();

    public:  // New functions

        /**

        * Registers a positioner as user of this PSY.

        *

        * @param aImplementationUid the implementation UID for the PSY.

        * @return the CPosPsyExtension instance, common for all CPositioner

        *         instances with the same implementation UID.

        */

        CPosPsyExtension* RegisterPositionerL(

        /* IN  */       TUid aImplementationUid

        );

        /**

        * De-registers a positioner as user of this PSY.

        *

        * @param aImplementationUid the implementationUid for the PSY.

        */

        void DeregisterPositioner(

        /* IN  */       TUid aImplementationUid

        );

    private:  // New functions

        TInt Find(TUid aImplementationUid);

    private:  // Constructors and destructor

        /**

        * C++ default constructor.

        */

        CPositionerRegistry(MPosStatusObserver* aStatusObserver);

        /**

        * Destructor.

        */

        ~CPositionerRegistry();

        // By default, prohibit copy constructor

        CPositionerRegistry( const CPositionerRegistry& );

        // Prohibit assigment operator

        CPositionerRegistry& operator= ( const CPositionerRegistry& );

    private: // Data

        RPointerArray<CPosPsyExtension> iPsyExtensions;

        TInt                            iRefCount;

        MPosStatusObserver*             iStatusObserver;

    };  

#endif  // CPOSITIONERREGISTRY_H

// End of File