1 /*

     2 * Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:  helper function for loading CUpnpCommand plugin

    15 *

    16 */

    17 

    18 

    19 #include <e32base.h>

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

    21 #include <mmf/common/mmfcontrollerpluginresolver.h>

    22 #include "upnpcommand.h"

    23 

    24 /**

    25  * -------------------------------------------------------------------------

    26  * LoadUpnpCommandL

    27  * A helper inline function to load the upnp plugin.

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

    29  * If plugin can not be located, leaves with KErrNotSupported

    30  *

    31  * @param aCommandId the identity of command to load

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

    33  * -------------------------------------------------------------------------

    34  */

    35 inline CUpnpCommand* LoadUpnpCommandL(

    36     UpnpCommand::TUpnpCommandId aCommandId,

    37     MUpnpCommandCallback* aCallback = 0 )

    38     {

    39     CUpnpCommand* command = NULL;

    40 

    41     // Create resolver parameters to pin point the implementation

    42     TEComResolverParams resolverParams;

    43     _LIT8( KCommandDataType, "UpnpCommand" );

    44     resolverParams.SetDataType( KCommandDataType );

    45     resolverParams.SetWildcardMatch( EFalse );

    46 

    47     RImplInfoPtrArray implArray;

    48    CleanupResetAndDestroyPushL( implArray );

    49 

    50     // Find implementation for the interface

    51     const TUid implIFUid = {0x200075DB};

    52     REComSession::ListImplementationsL( implIFUid, implArray );

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

    54         {

    55         CImplementationInformation* implInfo = implArray[i];

    56 

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

    58             {

    59             TAny* impl = REComSession::CreateImplementationL(

    60                 implIFUid,

    61                 CUpnpCommand::DtorKeyOffset(),

    62                 resolverParams );

    63 

    64             // Cast the object to correct type before returning

    65             command = REINTERPRET_CAST( CUpnpCommand*, impl );

    66 

    67             // Set the command ID

    68             CleanupStack::PushL( command );

    69             command->SetCommandIdL( aCommandId );

    70             if ( aCallback )

    71                 {

    72                 command->SetObserver( aCallback );

    73                 }

    74             CleanupStack::Pop( command );

    75             }

    76         }

    77     CleanupStack::PopAndDestroy(); // empties implArray

    78 

    79     if ( command == 0 )

    80         {

    81         User::Leave( KErrNotSupported );

    82         }

    83 

    84     // Return the object

    85     return command;

    86     }

    87 

    88 // End of File