sl@0: /*
sl@0: * Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: * All rights reserved.
sl@0: * This component and the accompanying materials are made available
sl@0: * under the terms of the License "Eclipse Public License v1.0"
sl@0: * which accompanies this distribution, and is available
sl@0: * at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: *
sl@0: * Initial Contributors:
sl@0: * Nokia Corporation - initial contribution.
sl@0: *
sl@0: * Contributors:
sl@0: *
sl@0: * Description: 
sl@0: * Implements CViewEvaluator.	 See class and function definitions for
sl@0: * more information.
sl@0: *
sl@0: */
sl@0: 
sl@0: 
sl@0: /**
sl@0:  @file
sl@0: */
sl@0: #include "upsserver.h"
sl@0: #include "viewevaluator.h"
sl@0: #include <ups/upsdbw.h>
sl@0: #include <scs/ipcstream.h>
sl@0: #include <scs/nullstream.h>
sl@0: 
sl@0: namespace UserPromptService
sl@0: {
sl@0: inline CUpsSession *CViewEvaluator::UpsSession()
sl@0: 	{
sl@0: 	return static_cast<CUpsSession*>(iSession);
sl@0: 	}
sl@0: 
sl@0: CViewEvaluator* CViewEvaluator::NewLC(CUpsSession* aSession, const RMessage2& aMessage)
sl@0: 	{
sl@0: 	CViewEvaluator* self = new(ELeave) CViewEvaluator(aSession, aMessage);
sl@0: 	CleanupStack::PushL(self);
sl@0: 	self->ConstructL(aMessage);
sl@0: 	return self;
sl@0: 	}
sl@0: 
sl@0: CViewEvaluator::~CViewEvaluator()
sl@0: /**
sl@0: 	Normally cleanup should be done when DoCleanup function is called by the framework.
sl@0: 	Sometime later, possibly after our parent CUpsSession has been deleted, this
sl@0: 	destructor will be run. In this case the framework will have cleared our iSession variable
sl@0: 	and we must do NOTHING.
sl@0: 
sl@0: 	Unfortunately there is a special case where this object fails inside ConstructL, when we must do 
sl@0: 	some cleanup. We can detect this be seeing iSession (and hence UpsServer()) is non-NULL.
sl@0: */
sl@0: 	{
sl@0: 	CUpsSession *session = UpsSession();
sl@0: 	if(session)
sl@0: 		{
sl@0: 		/*lint -save -e1506 */ // ignore warning about calling virtual function in destructor
sl@0: 		DoCleanup();
sl@0: 		/*lint -restore */
sl@0: 		}
sl@0: 	}
sl@0: 
sl@0: void CViewEvaluator::StartEvaluatingView()
sl@0: 	/// Starts evaluating the database view
sl@0: 	{
sl@0: 	UpsSession()->iManagementView->EvaluateView(iStatus);
sl@0: 	SetActive();
sl@0: 	}
sl@0: 
sl@0: CViewEvaluator::CViewEvaluator(CUpsSession* aSession, const RMessage2& aMessage)
sl@0: 	:	CAsyncRequest(aSession, 0, aMessage)
sl@0: 	{
sl@0: 	}
sl@0: 
sl@0: void CViewEvaluator::ConstructL(const RMessage2& aMessage)
sl@0: 	{
sl@0: 	// Read filter from the client
sl@0: 	RIpcReadStream ipcstream;
sl@0: 	ipcstream.Open(aMessage, 0);
sl@0: 	CleanupClosePushL(ipcstream);
sl@0: 	CDecisionFilter *filter = CDecisionFilter::NewLC();
sl@0: 	ipcstream >> *filter;
sl@0: 
sl@0: 	// Set the session slave DB handle callback to us, so we know if the handle is about to be 
sl@0: 	// deleted...
sl@0: 	//RDebug::Printf("CViewEvaluator::ConstructL calling SetCallback(%x)\n", this);
sl@0: 	UpsSession()->iDbViewHandle.SetCallback(this);
sl@0: 
sl@0: 	// Create the CDecisionView object
sl@0: 	// nb. We do not need to check iManagementView is NULL here because CUpsSession would have failed the request with KErrServerBusy if it were not.
sl@0: 	UpsSession()->iManagementView = UpsSession()->iDbViewHandle->CreateViewL(*filter);
sl@0: 
sl@0: 	CleanupStack::PopAndDestroy(filter);
sl@0: 	CleanupStack::PopAndDestroy(&ipcstream);
sl@0: }
sl@0: 
sl@0: 
sl@0: void CViewEvaluator::DoCleanup()
sl@0: /// implement CAsyncRequest
sl@0: 	{
sl@0: 	Cancel();
sl@0: 	// Reset slave DB handle callback to the session object
sl@0: 	//RDebug::Printf("CViewEvaluator::DoCleanup - %x calling SetCallback(%x)\n", this, UpsSession());
sl@0: 	UpsSession()->iDbViewHandle.SetCallback(UpsSession());
sl@0: 	}
sl@0: 
sl@0: void CViewEvaluator::DoCancel()
sl@0: 	/// implement CActive - Cancel the database CreateView
sl@0: 	{
sl@0: 	CDecisionView *view = UpsSession()->iManagementView;
sl@0: 	ASSERT(view != 0);
sl@0: 	view->Cancel();
sl@0: 
sl@0: 	// Cancelled so cleanup view 
sl@0: 	UpsSession()->CleanupView();
sl@0: 	}
sl@0: 
sl@0: 	
sl@0: void CViewEvaluator::RunL()
sl@0: 	/// implement CActive, override CAsyncRequset
sl@0: 	{
sl@0: 	User::LeaveIfError(iStatus.Int());
sl@0: 	UpsSession()->PrefetchRecordAndWriteLengthToClientL(iMessagePtr2);
sl@0: 	CompleteAndMarkForDeletion(KErrNone);
sl@0: 	}
sl@0: 
sl@0: TInt CViewEvaluator::RunError(TInt aError)
sl@0: 	{
sl@0: 	// Something bad happened so delete the view objects
sl@0: 	UpsSession()->CleanupView();
sl@0: 	return CAsyncRequest::RunError(aError);
sl@0: 	}
sl@0: 
sl@0: void CViewEvaluator::DbHandleAboutToBeDeleted()
sl@0: /**
sl@0: 	Called just before the master database handle is shut.
sl@0: 	Need to cancel and cleanup/delete our view and fail the client request.
sl@0: */
sl@0: 	{
sl@0: 	// Make sure our request is cancelled
sl@0: 	// If the view create is in progress, or has completed but our RunL hasn't had a chance to run yet, we will still be active
sl@0: 	// so the DoCancel will get called and cleanup the view.
sl@0: 	// If RunL fails, RunError will cleanup the view, if it completes we will no longer be registered to be called.
sl@0: 	Cancel();
sl@0: 
sl@0: 	// Abort the client view request.
sl@0: 	CompleteAndMarkForDeletion(KErrAbort);
sl@0: 	}
sl@0: }
sl@0: // End of file