--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/commsfwtools/preparedefaultcommsdatabase/src/MetaDatabaseVisitor.cpp	Thu Dec 17 09:22:25 2009 +0200
@@ -0,0 +1,246 @@
+// Copyright (c) 2004-2009 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:
+// Implementation of visitor classes to process MetaDatabase objects
+// 
+//
+
+/**
+ @file 
+ @internalTechnology
+*/
+
+#ifdef SYMBIAN_ENABLE_SPLIT_HEADERS
+#include <commsdattypesv1_1_partner.h>
+#endif
+
+#include "CommsDatInternalDefs.h"
+#include "MetaDatabaseVisitor.h"
+#include "CommsDat.h"
+
+using namespace CommsDat;
+using namespace Meta;
+
+
+
+//
+// These functions don't need to be specialised in derived templated visitors
+// 
+TMDBVisitorBase::TMDBVisitorBase()
+: Meta::MMetaType(), iMaxLength(0), iOwner(0), iElementId(0)
+    {   
+    }
+
+
+TMDBVisitorBase::TMDBVisitorBase(TMDBElementId* aElementId)
+: Meta::MMetaType(), iMaxLength(0), iOwner(0), iElementId(aElementId) 
+    {   
+    }
+
+
+TMDBVisitorBase::~TMDBVisitorBase()
+/*
+Nothing to delete
+*/
+    {
+    }
+
+
+void TMDBVisitorBase::SetElementId(TMDBElementId* aElementId)
+    {
+    if (aElementId)
+        {
+            iElementId = aElementId;
+        }
+    }
+
+void TMDBVisitorBase::SetElementId(TMDBElementId aElementId)
+    {
+    if (aElementId)
+        {
+            *iElementId = aElementId;
+        }
+    }
+
+void TMDBVisitorBase::ResetElementId(TInt aRecId)
+	{
+	*iElementId &= ~KCDChangedFlag;
+	*iElementId &= (~ECDHidden);
+	if (aRecId)
+		{
+		*iElementId |= aRecId;
+		}
+	}
+
+TBool TMDBVisitorBase::IsFieldLoaded()
+/*
+Has the value been changed by the caller?
+
+@internalComponent
+*/  { 
+	if (iElementId)
+    	{
+    	return( (*iElementId & KCDNotNullFlag) == KCDNotNullFlag );
+    	}
+    	
+    return false;
+    } 
+
+void TMDBVisitorBase::FieldLoaded()
+/*
+The value has been loaded from the db
+
+@internalComponent
+*/  { 
+	if (iElementId)
+    	{
+    		*iElementId |= KCDNotNullFlag;
+            *iElementId &= ~KCDChangedFlag;
+    	}
+    } 
+    
+void TMDBVisitorBase::SetFieldNull()
+/*
+The value is not set in the db
+
+@internalComponent
+*/  { 
+	if (iElementId)
+    	{
+    		*iElementId &= ~KCDNotNullFlag;
+            *iElementId &= ~KCDChangedFlag;
+    	}
+    } 
+
+
+
+void TMDBVisitorBase::Change()
+/*
+set the changed flag in element id
+*/
+    { 
+    if (iElementId)
+    	{
+    		*iElementId |= KCDChangedFlag;
+    	}
+    } 
+
+
+void TMDBVisitorBase::Sync()
+/*
+switch off the changed flag in element id
+*/
+    { 
+    if (iElementId)
+    	{
+    		*iElementId &= ~KCDChangedFlag;
+    	}
+    }
+
+
+TUint32 TMDBVisitorBase::TypeId() 
+    {
+    if (iElementId)
+    	{
+    		return *iElementId & KCDMaskShowType;
+    	}
+    	return 0;
+    }
+
+
+TUint32 TMDBVisitorBase::ElementId()
+    {
+    if (iElementId)
+    	{
+    		return *iElementId;
+    	}
+    	return 0;
+    }
+
+
+void TMDBVisitorBase::SetMaxLength(TInt aLength)
+    {
+    iMaxLength = aLength;
+    }
+
+
+void TMDBVisitorBase::SetOwner(CMDBElement* aOwner)
+/*
+Set the owner of this element as is needed for callback.
+If necessary set the element id or amend it with info from the owner
+
+@internalComponent
+*/  
+	{ 
+    iOwner = aOwner; 
+
+    if (! iElementId)
+        {
+        iElementId = aOwner->Data();
+        }
+	else
+		{
+		*iElementId |= aOwner->ElementId() & (KCDMaskShowRecordId | KCDMaskShowAttributes);
+		}
+    }
+
+TInt TMDBVisitorBase::GetL(CMDBSessionImpl* /*aSession*/) 
+/*
+Retrieve this element from the database
+not all sub-classes need to provide this function.
+*/
+    {
+    return KErrNotSupported;
+    }
+    
+TBool CompareByRecordId(const TUint32& aFirst, const TUint32& aSecond)
+// Utility for RArray Find
+    {
+    return( (aFirst & KCDMaskShowRecordId) == (aSecond & KCDMaskShowRecordId) );
+    }
+
+
+void TMDBVisitorBase::FindRecordsUsingTemplateL(CMDBSessionImpl* aSession, RArray<TUint32>& aRecordIds, RArray<TUint32>& aCandidateIds)
+// because entry exists in template, must include all records that don't have any entries
+    {
+    // First find all record ids by looking at placeholders
+    TUint32 mask = KCDMaskShowType | aSession->GetReadAttributeMask();
+
+    TInt err = aSession->StorageL()->FindL(ElementId() | 0x80000000 | KCDMaskShowFieldType, mask | 0x80000000, aRecordIds);
+    
+    if (err != KErrNone)
+        {
+        User::Leave(err); // at this stage know there is something there
+        }
+
+    RArray<TUint32> fieldIds;
+    CleanupClosePushL(fieldIds);
+ 
+
+    // then find all fields not using template
+    err = aSession->StorageL()->FindL(ElementId() & KCDMaskHideAttrAndRes, mask, fieldIds);
+
+    // The fields not found are the records using the template so add the difference to the list of candidates
+    for ( TInt i = 0; i < (aRecordIds.Count() - 1); i++ ) // don't ever want to include the table id.
+        {
+        if ( KErrNotFound == fieldIds.Find(aRecordIds[i], CompareByRecordId) )
+            {
+            aCandidateIds.Append(aRecordIds[i]);
+            }
+        }
+    CleanupStack::PopAndDestroy(&fieldIds); 
+    }
+
+
+
+//EOF