/*

* Copyright (c) 2006,2007 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:  This class is responsible for loading,upgrading and holding 

*				 the stratergy ecom plugin

*

*/

// INCLUDE FILES

#include <e32base.h>

#include <ecom.h>

#include <implementationinformation.h>

#include <e32property.h>

#include "lbtstratergycontainer.h"

#include "lbtstatuspskeys.h"

#include "lbtstrategybase.h"

#include "lbttriggeringsupervisionobserver.h"

#include "lbtlogger.h"

// ======== LOCAL FUNCTIONS =========

// static cleanup function

static void RImpleInfoPtrArrayCleanup( TAny* aArray )

	{

	static_cast<RImplInfoPtrArray*>( aArray )->ResetAndDestroy();

	}

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

// ---------------------------------------------------------------------------

// CLbtStratergyContainer::NewL

// Symbian Two - phase constructor

// ---------------------------------------------------------------------------

//

CLbtStratergyContainer* CLbtStratergyContainer::NewL()

	{

	FUNC_ENTER("CLbtStratergyContainer::NewL");

	CLbtStratergyContainer* self = new ( ELeave ) CLbtStratergyContainer;

    CleanupStack::PushL( self );

    self->ConstructL();    

    CleanupStack::Pop();

    return self;

	}

// ---------------------------------------------------------------------------

// CLbtStratergyContainer::ConstructL

// ---------------------------------------------------------------------------

//

void CLbtStratergyContainer::ConstructL()

	{

	FUNC_ENTER("CLbtStratergyContainer::ConstructL");

	iEComSession = &(REComSession::OpenL());

	iStratergy = NULL;

	User::LeaveIfError( iProperty.Attach(KPSUidLbtStatusInformation, 

                                         KLbtLocationTriggeringSupervisionStatus,

                                         EOwnerThread) );

  }

// ---------------------------------------------------------------------------

// CLbtStratergyContainer::~CLbtStratergyContainer

// ---------------------------------------------------------------------------

//

CLbtStratergyContainer::~CLbtStratergyContainer()

	{

	FUNC_ENTER("CLbtStratergyContainer::~CLbtStratergyContainer");

	delete iStratergy;

	Cancel();

	if(iEComSession)

		{

		iEComSession->Close();

		}

    // This has to be called to free resources by

    // ECom Framework. Failing this call memory is leaked

	REComSession::FinalClose();

	iProperty.Close();

	}

// ---------------------------------------------------------------------------

// CLbtStratergyContainer::CLbtStratergyContainer

// ---------------------------------------------------------------------------

//

CLbtStratergyContainer::CLbtStratergyContainer()

    : CActive(EPriorityStandard)

	{

	FUNC_ENTER("CLbtStratergyContainer::CLbtStratergyContainer");

	CActiveScheduler::Add(this);

	}

// ---------------------------------------------------------------------------

// CLbtStratergyContainer::LoadStratergyL

// ---------------------------------------------------------------------------

//

void CLbtStratergyContainer::LoadStratergyL(MLbtTriggeringSupervisionObserver* aPtr)

	{

	FUNC_ENTER("CLbtStratergyContainer::LoadStratergyL");

	RImplInfoPtrArray implArray;

	REComSession::ListImplementationsL(KLocAcquisitionStrategyInterfaceUid, implArray);	

	if(implArray.Count() != 1)

		{

		implArray.ResetAndDestroy();

		// Leave if there are more than one or no 

		// implementation of stratergy

		User::Leave(KErrNotFound);

		}

	TCleanupItem arrayCleanup( RImpleInfoPtrArrayCleanup, &implArray );

	CleanupStack::PushL(arrayCleanup);

	CImplementationInformation* info = implArray[0];

	iStratergy = CLbtStrategyBase::NewL(aPtr);

	iVersion = info->Version();

	CleanupStack::PopAndDestroy(); // implArray

	iProperty.Set(KPSUidLbtStatusInformation, 

                  KLbtLocationTriggeringSupervisionStatus, 

                  ELbtLocationTriggeringSupervisionSuccessful);

  // request ecom framework for ecom change notification

	iEComSession->NotifyOnChange(iStatus);	

	SetActive();

	}

// ---------------------------------------------------------------------------

// CLbtStratergyContainer::Stratergy

// ---------------------------------------------------------------------------

//

CLbtStrategyBase* CLbtStratergyContainer::Stratergy()

	{

	FUNC_ENTER("CLbtStratergyContainer::Stratergy");

	return iStratergy;

	}

// ---------------------------------------------------------------------------

// CLbtStratergyContainer::RunL

// ---------------------------------------------------------------------------

//

void CLbtStratergyContainer::RunL()

	{

	FUNC_ENTER("CLbtStratergyContainer::RunL");

	// request ecom framework for notification

	iEComSession->NotifyOnChange(iStatus);

	SetActive();

	RImplInfoPtrArray implArray;

	REComSession::ListImplementationsL(KLocAcquisitionStrategyInterfaceUid, implArray);

	CleanupClosePushL(implArray);

	CImplementationInformation* info = implArray[0];

	// If stratergy is already loaded, and if its

	// dll has changed then reload it

	if(info->Version() != iVersion && iStratergy )

	    {

	    // this will unload stratergy

	    delete iStratergy;

	    iStratergy = NULL;

	    // Load the dll again

	    iStratergy = CLbtStrategyBase::NewL(this);

	    iVersion = info->Version();

        }

    CleanupStack::PopAndDestroy(); // implArray

	}

// ---------------------------------------------------------------------------

// CLbtStratergyContainer::RunError

// ---------------------------------------------------------------------------

//

TInt CLbtStratergyContainer::RunError(TInt /*aError*/)

	{

	FUNC_ENTER("CLbtStratergyContainer::RunError");

	return KErrNone;

	}

// ---------------------------------------------------------------------------

// CLbtStratergyContainer::DoCancel

// ---------------------------------------------------------------------------

//

void CLbtStratergyContainer::DoCancel()

	{

	FUNC_ENTER("CLbtStratergyContainer::DoCancel");

	if(iEComSession)

		{

		// cancel request for ecom notification

		// Note that although this takes a iStatus parameter, this is a

		// synchronous call.

		iEComSession->CancelNotifyOnChange(iStatus);

		}

	}

// ---------------------------------------------------------------------------

// CLbtStratergyContainer::UnloadStratergy

// ---------------------------------------------------------------------------

//

void CLbtStratergyContainer::UnloadStratergy()

    {

    FUNC_ENTER("CLbtStratergyContainer::UnloadStratergy");

    // Deleting the interface will unload 

    // Stratergy

    delete iStratergy;

    iStratergy = NULL;

    iProperty.Set(KPSUidLbtStatusInformation, 

                  KLbtLocationTriggeringSupervisionStatus, 

                  ELbtLocationTriggeringSupervisionNotActive);

    // Cancel ECom upgrade notification

    Cancel();

    }

// end of file