/*

* Copyright (c) 2002 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: 

*       Implementation for extension dll loader.

*

*/

// INCLUDE FILES

#include "CLogsExtensionLoader.h"

#include "TLogsDummyExtensionFactory.h"

#include "ExtensionUID.h"

#include <data_caging_path_literals.hrh>  //KDC_APP_BITMAP_DIR and KDC_SHARED_LIB_DIR

#include <featmgr.h>

// MODULE DATA STRUCTURES

typedef MLogsExtensionFactory* (*TExtensionEntryPoint)();

// ================= MEMBER FUNCTIONS =======================

inline CLogsExtensionLoader::CLogsExtensionLoader()

    {

    }

inline void CLogsExtensionLoader::ConstructL()

    {

    //Tries to load the extension dll and initialise iFactory to point to the loaded dll

    TRAPD(err, LoadExtensionDllL());

    //If dll is not part of rom image then initialise iFactory to point to dummy implementation instead

    if (err)

        {    

        if ( iFactory )

            {

            iFactory->Release();

            iFactory = NULL;

            }

        iFactory = TLogsDummyExtensionFactory::NewL();

        }

    }

CLogsExtensionLoader* CLogsExtensionLoader::NewL()

    {

    CLogsExtensionLoader* self = new (ELeave) CLogsExtensionLoader;

    CleanupStack::PushL(self);

    self->ConstructL();

    CleanupStack::Pop(self);

    return self;

    }

CLogsExtensionLoader::~CLogsExtensionLoader()

    {      

    if ( iFactory )

        {

        iFactory->Release();

        iFactory = NULL;

        }

    iDll.Close(); // This has to be last 

    }

//Returns refrence to loaded dll's factory functionality or default implementation

MLogsExtensionFactory& CLogsExtensionLoader::ExtensionFactory()

    {    

    return *iFactory;

    }

TUidType CLogsExtensionLoader::UidType()

    {

    return TUidType(KNullUid, TUid::Uid(KExtensionDllUID2), KNullUid);

    }

void CLogsExtensionLoader::LoadExtensionDllL()

    {

    // If voip is not supported then don't try to load the

    // extension dll, leave will cause the dummy extension to be

    // used instead

    if ( !FeatureManager::FeatureSupported(KFeatureIdCommonVoip))

        {

        User::Leave(KErrNotFound);

        }        

    else

        {

        // Set up path+filename for extension dll

        TFileName dllFileWithPath;

        dllFileWithPath += KDC_SHARED_LIB_DIR;

        dllFileWithPath += KLogsUiExtensionDllFile;  

        User::LeaveIfError(iDll.Load(dllFileWithPath, UidType()));  

        // Get the 1st entry point from the DLL

        TExtensionEntryPoint createExtensionFactoryL =

            reinterpret_cast<TExtensionEntryPoint>(iDll.Lookup(1));

        if (!createExtensionFactoryL)

            {

            User::Leave(KErrNotFound);

            }

         // Call the entry point to create the test suite

        iFactory = createExtensionFactoryL();

        if (!iFactory)

            {

            User::Leave(KErrNotFound);

            }

        }

    }

// End of File