922 

   923 /** 

   924 Update a selection of children to read or Unread asynchronously of the context. 

   925 The returned CMsvOperation object .

   926 

   927 @param	aSelection 

   928 The selectio of entry values for the context

   929 

   930 @param	aMark 

   931 True : Update selection to UnRead .

   932 False: Update selection to Read . 

   933 

   934 @param aStatus The request status to be completed when the operation has finished .

   935 

   936 @leave KErrAccessDenied The entry is locked by another client 

   937 

   938 @return

   939 An operation object controlling the change command

   940 */

   941 EXPORT_C CMsvOperation* CMsvEntry::ChangeL(const CMsvEntrySelection& aSelection,TBool aMark, TRequestStatus& aStatus)

   942      {

   943 #ifndef _NO_SESSION_LOGGING_

   944     Log(_L("Asynchronous ChangeL with selection of %d entries"), aSelection.Count()); 

   945 #endif

   946 

   947     __ASSERT_DEBUG(aSelection.Count(), PanicServer(EMsvEmptySelection));

   948 

   949 #if defined(_DEBUG)    

   950      

   951       TInt aCount = aSelection.Count();

   952       while (aCount--)

   953           {

   954           TMsvEntry aEntry;

   955           TMsvId aService;

   956           if (iMsvSession.Session().GetEntry(aSelection.At(aCount), aService, aEntry)==KErrNone)

   957               {

   958               __ASSERT_DEBUG(iState==EValid || iState==EInvalidDeletedContext, PanicServer(EMsvEntryAlreadyChangingContext));

   959               __ASSERT_DEBUG(MsvUtils::ValidEntry(aEntry), PanicServer(EMsvChangingToInvalidEntry));

   960              

   961               // can only change the current context

   962               if (!MsvUtils::ValidEntry(aEntry))

   963                   User::Leave(KErrArgument);

   964               }

   965            }

   966 #endif

   967       // cannot change standard folders

   968       if (iEntryPtr->StandardFolder())

   969           User::Leave(KErrAccessDenied);

   970   

   971       //// create the operation

   972       CMsvEntryOperation* operation = CMsvEntryOperation::NewL(iMsvSession, aStatus);

   973       CleanupStack::PushL(operation);

   974       User::LeaveIfError(iMsvSession.Session().OperationMtmL(aSelection.At(0), operation->iMtm, operation->iService)); 

   975    

   976       // start the change operation

   977 	  iMsvSession.Session().ChangeEntriesL(aSelection, aMark, operation->Id(), RProcess().SecureId(), operation->iStatus);

   978      

   979       operation->Start();

   980       iState = EInvalidChangingContext;

   981       CleanupStack::Pop(1); // operation 

   982       return operation; 

   983       }