/*

* 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:

* Declaration of CSsmMapperUtility class.

*

*/

#ifndef SSMMAPPERUTILITY_H

#define SSMMAPPERUTILITY_H

#include <e32base.h>

class TSsmState;

/**

* Utility class for mapping Uids, getting feature

* and system states and cenrep values.

*

*/

class CSsmMapperUtility : public CBase

    {

public:

    /**

     * Two-phased constructor. Clients of mapper utility

     * should use this method for creating instance.

     */

    IMPORT_C static CSsmMapperUtility* NewL();

    /**

     * Destructor

     */

    IMPORT_C virtual ~CSsmMapperUtility();

    /**

     * Methods for mapping p&s, cenrep and feature Uids

     *

     * @param aUid The Uid to map

     * @return The mapped Uid 

     */

    virtual TUid PsUid( const TUid& aUid );

    virtual TUid CrUid( const TUid& aUid );

    virtual TUid FeatureUid( const TUid& aUid );

    /**

     * Get the current system state

     *

     * @param aState On return contains the current state

     * @return KErrNone if system state read successfully.

     *         Otherwise one of Symbian error codes. 

     */

    virtual TInt GetCurrentState( TSsmState& aState ) const;

    /**

     * Gets the requested feature Uid's status

     *

     * @param aUid Requested feature Uid

     * @return ETrue if feature supported, otherwise EFalse

     */

    IMPORT_C TBool FeatureStatus( const TUid& aUid );

    /**

     * Gets the requested cenrep key's value

     *

     * @param aUid Requested cenrep Uid

     * @param aKey Requested cenrep key

     * @param aValue On return contains value of requested key

     * @return KErrNone if value read successfully.

     *         Otherwise one of Symbian error codes.

     */

    IMPORT_C TInt CrValue( const TUid& aUid, TUint32 aKey, TInt& aValue );

    /**

     * Gets the requested cenrep key's value

     *

     * @param aUid Requested cenrep Uid

     * @param aKey Requested cenrep key

     * @param aValue On return contains value of requested key

     * @return KErrNone if descriptor read successfully.

     *         Otherwise one of Symbian error codes.

     */

    IMPORT_C TInt CrValue( const TUid& aUid, TUint32 aKey, TDes& aValue );

    /**

     * Gets the path to command lists

     *

     * @param aCmdListPath Default path. Will be modified if called from test code.

     */

    virtual void GetCommandListPath( TDes& aCmdListPath );

    /**

     * Checks the capabilities of client

     *

     * @aMessage Client message

     * @return ETrue if capabilities ok, otherwise EFalse

     */

    IMPORT_C virtual TBool CheckCaps( const RMessagePtr2& aMessage );

    /**

    * First phase constructor. Exported for 

    * deriver classes.

    */

    IMPORT_C CSsmMapperUtility();

private:

    /**

    * Second phase of construction.

    */

    void ConstructL();

private:

    // Extension library handle

    RLibrary iExtensionLib;

    // Extension instance. Can be NULL when extension is missing. Own.

    CSsmMapperUtility *iExtension;

    };

#endif // SSMMAPPERUTILITY_H