/*

* Copyright (c) 2008 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:  helper function for loading CUpnpCommand plugin

*

*/

#include <e32base.h>

#include <ecom/ecom.h>          // REComSession

#include <mmf/common/mmfcontrollerpluginresolver.h>

#include "upnpcommand.h"

/**

 * -------------------------------------------------------------------------

 * LoadUpnpCommandL

 * A helper inline function to load the upnp plugin.

 * The method guarantees the correct instance is loaded in a secure way.

 * If plugin can not be located, leaves with KErrNotSupported

 *

 * @param aCommandId the identity of command to load

 * @param aCalback callback interface pointer (may be left NULL)

 * -------------------------------------------------------------------------

 */

inline CUpnpCommand* LoadUpnpCommandL(

    UpnpCommand::TUpnpCommandId aCommandId,

    MUpnpCommandCallback* aCallback = 0 )

    {

    CUpnpCommand* command = NULL;

    // Create resolver parameters to pin point the implementation

    TEComResolverParams resolverParams;

    _LIT8( KCommandDataType, "UpnpCommand" );

    resolverParams.SetDataType( KCommandDataType );

    resolverParams.SetWildcardMatch( EFalse );

    RImplInfoPtrArray implArray;

   CleanupResetAndDestroyPushL( implArray );

    // Find implementation for the interface

    const TUid implIFUid = {0x200075DB};

    REComSession::ListImplementationsL( implIFUid, implArray );

    for( TInt i=0; i<implArray.Count() && command==0; ++i )

        {

        CImplementationInformation* implInfo = implArray[i];

        if( implInfo->VendorId() == VID_DEFAULT && implInfo->RomBased() )

            {

            TAny* impl = REComSession::CreateImplementationL(

                implIFUid,

                CUpnpCommand::DtorKeyOffset(),

                resolverParams );

            // Cast the object to correct type before returning

            command = REINTERPRET_CAST( CUpnpCommand*, impl );

            // Set the command ID

            CleanupStack::PushL( command );

            command->SetCommandIdL( aCommandId );

            if ( aCallback )

                {

                command->SetObserver( aCallback );

                }

            CleanupStack::Pop( command );

            }

        }

    CleanupStack::PopAndDestroy(); // empties implArray

    if ( command == 0 )

        {

        User::Leave( KErrNotSupported );

        }

    // Return the object

    return command;

    }

// End of File