--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/photosgallery/viewframework/medialists/src/glxerrormanager.cpp	Thu Dec 17 08:45:44 2009 +0200
@@ -0,0 +1,291 @@
+/*
+* Copyright (c) 2008-2009 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:    Utility class to manage attribute retrieval errors
+*
+*/
+
+
+
+
+#include "glxerrormanager.h"
+
+//#include <glxerrors.h>
+
+#include "glxfetcherrorarray.h"
+#include "glxcachemanager.h"
+#include "glxmedialist.h"
+#include <glxtracer.h>                         // For Logs
+#include <glxlog.h>                         // For Logs
+
+/** Error attribute content ID */
+const TInt KGlxErrorContentId = 0x200071AC;
+const TMPXAttributeData KGlxMediaErrorArray = { KGlxErrorContentId, 0x01 }; // CGlxFetchErrorArray
+
+const TInt KGlxErrorTimeOut = -10033;
+
+// -----------------------------------------------------------------------------
+// Return errors
+// -----------------------------------------------------------------------------
+//
+inline CGlxFetchErrorArray* Errors( const CGlxMedia& aMedia ) 
+    {
+    TRACER("GlxErrorManager::Errors");
+    
+    return const_cast<CGlxFetchErrorArray*>(
+        static_cast<const CGlxFetchErrorArray*>( aMedia.ValueCObject( 
+            KGlxMediaErrorArray ) ) );
+    }
+
+// -----------------------------------------------------------------------------
+// SetAttributeErrorL
+// -----------------------------------------------------------------------------
+//
+void GlxErrorManager::SetAttributeErrorL(CGlxMedia* aItem, const RArray<TMPXAttribute>& aAttributes, TInt aError)
+    {
+    TRACER("GlxErrorManager::SetAttributeErrorL");
+    
+    if ( aItem )
+        {
+        CGlxFetchErrorArray* errorArray = NULL;
+            
+        if ( aItem->IsSupported(KGlxMediaErrorArray) )
+            {
+    		const CGlxFetchErrorArray* existingArray = static_cast<const CGlxFetchErrorArray*>(aItem->ValueCObject(KGlxMediaErrorArray));
+    		
+    		if ( existingArray )
+    		    {
+                errorArray = CGlxFetchErrorArray::NewLC(existingArray);
+                }
+            }
+            
+        if ( !errorArray )            
+            {
+            errorArray = new(ELeave) CGlxFetchErrorArray();
+            CleanupStack::PushL(errorArray);
+            }
+
+        TInt attrCount = aAttributes.Count();
+        
+        for ( TInt attrIndex = 0; attrIndex < attrCount; attrIndex++ )
+            {
+            errorArray->AddErrorL(TGlxFetchError(aAttributes[attrIndex], aError));
+            }
+        
+        aItem->SetCObjectValueL(KGlxMediaErrorArray, errorArray);
+
+        CleanupStack::Pop(errorArray);
+        }            
+    }
+    
+// -----------------------------------------------------------------------------
+// HasAttributeErrorL
+// -----------------------------------------------------------------------------
+//
+EXPORT_C TInt GlxErrorManager::HasAttributeErrorL(const CGlxMedia* aMedia, 
+        const TMPXAttribute& aAttribute)
+    {
+    TRACER("GlxErrorManager::HasAttributeErrorL");
+    
+    TInt retVal = KErrNone;
+    
+    if ( aMedia )
+        {
+        const CGlxFetchErrorArray* errors = Errors( *aMedia );
+		
+		if ( errors )
+		    {
+		    TInt index = errors->FindError(aAttribute);
+		    if ( KErrNotFound != index )
+		        {
+    		    TGlxFetchError error = errors->Error(index);
+		        retVal = error.iError;
+		        
+	            if ( IsExpired( error ) )
+	                {
+	                retVal = KErrNone;
+	                }
+	                
+	            if ( KErrNone != retVal )
+	                {
+	                if ( IsTemporaryError(retVal) )
+	                    {
+    		            // Inform cache manager that at least one temporary error still exists
+    		            CGlxCacheManager* cacheManager = CGlxCacheManager::InstanceL();
+    		            cacheManager->SetTemporaryErrorFlag();
+    		            cacheManager->Close();
+	                    }
+	                }
+		        }
+		    }
+        }
+        
+    return retVal;
+    }
+    
+// -----------------------------------------------------------------------------
+// HasAttributeErrorL
+// -----------------------------------------------------------------------------
+//
+EXPORT_C TInt GlxErrorManager::HasAttributeErrorL(const CGlxMedia* aMedia, 
+        TInt aContentId)
+    {
+    TRACER("GlxErrorManager::HasAttributeErrorL");
+    
+    TInt retVal = KErrNone;
+    if ( aMedia )
+        {
+        const CGlxFetchErrorArray* errors = Errors( *aMedia );
+		
+		if ( errors )
+		    {
+		    TInt index = errors->FindError(aContentId);
+		    if ( KErrNotFound != index )
+		        {
+    		    TGlxFetchError error = errors->Error(index);
+		        retVal = error.iError;
+		        
+	            if ( IsExpired( error ) )
+	                {
+	                retVal = KGlxErrorTimeOut;
+	                }
+	                
+	            if ( KErrNone != retVal && KGlxErrorTimeOut != retVal)
+	                {
+	                if ( IsTemporaryError(retVal) )
+	                    {
+    		            // Inform cache manager that at least one temporary error still exists
+    		            CGlxCacheManager* cacheManager = CGlxCacheManager::InstanceL();
+    		            cacheManager->SetTemporaryErrorFlag();
+    		            cacheManager->Close();
+	                    }
+	                }
+		        }
+		        
+		    }
+        }
+        
+    return retVal;
+    }
+
+// -----------------------------------------------------------------------------
+// IsTemporaryError
+// -----------------------------------------------------------------------------
+//
+TBool GlxErrorManager::IsTemporaryError(TInt aErrorCode)
+    {
+    TRACER("GlxErrorManager::IsTemporaryError");
+ 	GLX_DEBUG2("GlxErrorManager::IsTemporaryError() aErrorCode=%d", aErrorCode);
+	               	 	    
+    /// @todo Implement this when list of temporary and permanent errors are known. Currently assume
+    ///       all errors are temporary
+    switch ( aErrorCode )
+        {
+        case KErrArgument: // fallthrough
+        case KErrNotSupported: // fallthrough
+        case KErrNoMemory:
+		case KErrCorrupt:
+        // add other permanent error codes here
+            return EFalse;
+            
+        default:
+            return ETrue;
+        };
+    }
+    
+// -----------------------------------------------------------------------------
+// IsErrorStillVal
+// -----------------------------------------------------------------------------
+//
+TBool GlxErrorManager::IsExpired( const TGlxFetchError& aError )
+    {
+    TRACER("GlxErrorManager::IsExpired");
+    
+    if ( IsTemporaryError(aError.iError) )
+        {
+        TTime now;
+        now.UniversalTime();
+
+        TTime errorTime(aError.iTimestamp);
+
+        if ( now - TTimeIntervalSeconds(KGlxTemporaryErrorValidityPeriodInSeconds) > errorTime )
+            {
+            return ETrue;
+            }
+        }
+        
+    return EFalse;
+    }
+    
+// -----------------------------------------------------------------------------
+// HasError
+// -----------------------------------------------------------------------------
+//
+TBool GlxErrorManager::HasError(const CGlxMedia* aMedia)
+    {
+    TRACER("GlxErrorManager::HasError");
+    
+    if ( aMedia )
+        {
+        return ( Errors( *aMedia ) != NULL );
+        }
+    
+    return EFalse;
+    }
+    
+// -----------------------------------------------------------------------------
+// ClearExpiredAndUnusedErrorsL
+// -----------------------------------------------------------------------------
+//
+void GlxErrorManager::ClearExpiredAndUnusedErrorsL( CGlxMedia& aMedia, 
+        const RArray<TMPXAttribute>& aAttributesInUse )
+    {
+    TRACER("GlxErrorManager::ClearExpiredAndUnusedErrorsL");
+    
+    CGlxFetchErrorArray* errors = Errors( aMedia );
+    
+    if ( errors )
+        {
+        // Iterate through the list of errors backwards, so that removal is more
+        // efficient, and loop control easier
+        for ( TInt i = errors->ErrorCount() - 1; i >= 0; i-- )
+            {
+            TGlxFetchError error = errors->Error( i );
+            // remove the error if it has expired, or if the attribute 
+            // that the error is for is no longer in use
+            if ( IsExpired( error ) || 
+                 KErrNotFound == aAttributesInUse.Find( error.iAttr, TMPXAttribute::Match ) )
+                {
+                errors->Remove( i );
+                }
+            }
+            
+        // no further errors are remaining, so can remove the error array 
+        // attribute from the media object
+        if ( errors->ErrorCount() == 0 )
+            {
+            aMedia.DeleteAttribute( KGlxMediaErrorArray );
+            }
+        }
+    }
+
+// -----------------------------------------------------------------------------
+// Return error attribute's id
+// -----------------------------------------------------------------------------
+//
+TMPXAttribute GlxErrorManager::ErrorAttribute()
+    {
+    TRACER("GlxErrorManager::ErrorAttribute");
+    
+    return KGlxMediaErrorArray;
+    }