diff -r 000000000000 -r c53acadfccc6 metadataengine/client/src/mderelation.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/metadataengine/client/src/mderelation.cpp	Mon Jan 18 20:34:07 2010 +0200
@@ -0,0 +1,268 @@
+/*
+* Copyright (c) 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:  ?Description
+*
+*/
+
+
+#include "mderelation.h"
+
+#include "mdcitem.h"
+#include "mdcserializationbuffer.h"
+#include "mderelationdef.h"
+#include "mdenamespacedef.h"
+
+
+//----------------------------------------------------------
+//               TMdERelation
+//----------------------------------------------------------
+
+TMdERelation::TMdERelation()
+	: iId( KNoId ), iLeftObjectId( KNoId ),
+	  iRightObjectId( KNoId ), iDef( NULL )
+	{
+	}
+
+EXPORT_C TItemId TMdERelation::Id() const
+	{
+	return iId;
+	}
+
+EXPORT_C CMdERelationDef& TMdERelation::DefL() const
+	{
+	if ( !iDef )
+		{
+		User::Leave( KErrNotFound );
+		}
+	return *iDef;
+	}
+
+EXPORT_C TItemId TMdERelation::LeftObjectId() const
+	{
+	return iLeftObjectId;
+	}
+
+EXPORT_C TItemId TMdERelation::RightObjectId() const
+	{
+	return iRightObjectId;
+	}
+
+TUint32 TMdERelation::RequiredBufferSize() const
+	{
+	return sizeof(TMdCRelation);
+	}
+
+void TMdERelation::DeSerializeL(CMdCSerializationBuffer& aBuffer, CMdENamespaceDef& aNamespaceDef)
+	{
+	const TMdCRelation& relation = TMdCRelation::GetFromBufferL( aBuffer );
+	iId = relation.iId;
+	iLeftObjectId = relation.iLeftObjectId;
+	iRightObjectId = relation.iRightObjectId;
+	if (iId == KNoId || iLeftObjectId == KNoId || iRightObjectId == KNoId)
+		{
+		User::Leave(KErrNotFound);
+		}
+	if(iLeftObjectId == iRightObjectId )
+		{
+		User::Leave( KErrArgument );
+		}
+	iDef = aNamespaceDef.GetRelationDefL( relation.iDefId );
+	}
+
+//----------------------------------------------------------
+//               CMdERelation
+//----------------------------------------------------------
+
+CMdERelation::CMdERelation(CMdESession* aSession, TItemId aId, 
+						   CMdERelationDef& aDef, TItemId aLeftObjectId, 
+						   TItemId aRightObjectId, TInt32 aParameter)
+		: CMdEInstanceItem(aSession, aId), iDef(aDef),
+		  iLeftObjectId(aLeftObjectId), iRightObjectId(aRightObjectId), 
+		  iParameter(aParameter), iGuidHigh( 0 ), iGuidLow( 0 ), iLastModifiedDate( 0 )
+	{
+	}
+
+
+void CMdERelation::ConstructL()
+	{
+	// Same object cannot be on both side of the relation
+	if(iLeftObjectId == iRightObjectId )
+		{
+		User::Leave( KErrArgument );
+		}
+
+	InstanceItemBaseConstruct();
+	}
+
+
+CMdERelation::~CMdERelation()
+	{
+	}
+
+CMdERelation* CMdERelation::NewL(CMdERelationDef& aDef, TItemId aLeftObjectId, 
+		 TItemId aRightObjectId, TInt32 aParameter)
+	{
+	CMdERelation* ret = CMdERelation::NewLC( aDef, aLeftObjectId, aRightObjectId, aParameter );
+	CleanupStack::Pop( ret );
+	return ret;
+	}
+
+CMdERelation* CMdERelation::NewLC(CMdERelationDef& aDef, TItemId aLeftObjectId, 
+		 TItemId aRightObjectId, TInt32 aParameter)
+	{
+	CMdERelation* ret = new (ELeave) CMdERelation( NULL, KNoId, aDef, aLeftObjectId, aRightObjectId, aParameter );
+	CleanupStack::PushL( ret );
+	ret->ConstructL();
+	return ret;
+	}
+
+CMdERelation* CMdERelation::NewL(CMdESession* aSession, CMdCSerializationBuffer& aBuffer, CMdENamespaceDef& aNamespaceDef)
+	{
+	CMdERelation* ret = CMdERelation::NewLC( aSession, aBuffer, aNamespaceDef );
+	CleanupStack::Pop( ret );
+	return ret;
+	}
+
+CMdERelation* CMdERelation::NewLC(CMdESession* aSession, CMdCSerializationBuffer& aBuffer, CMdENamespaceDef& aNamespaceDef)
+	{
+	const TMdCRelation& serializedRelation = TMdCRelation::GetFromBufferL( aBuffer );
+	if (serializedRelation.iId == KNoId)
+		{
+		User::Leave( KErrNotFound );
+		}
+	if (serializedRelation.iDefId == KNoDefId)
+		{
+		User::Leave( KErrNotFound );
+		}
+	CMdERelationDef* relationDef = aNamespaceDef.GetRelationDefL( serializedRelation.iDefId );
+	if ( !relationDef )
+		{
+		User::Leave( KErrNotFound );
+		}
+	if (serializedRelation.iLeftObjectId == KNoId)
+		{
+		User::Leave( KErrNotFound );
+		}
+	if (serializedRelation.iRightObjectId == KNoId)
+		{
+		User::Leave( KErrNotFound );
+		}
+
+	CMdERelation* relation = new (ELeave) CMdERelation( aSession, serializedRelation.iId, *relationDef,
+			serializedRelation.iLeftObjectId, serializedRelation.iRightObjectId, serializedRelation.iParameter );
+	CleanupStack::PushL( relation );
+
+	relation->SetGuid( serializedRelation.iGuidHigh, serializedRelation.iGuidLow );
+
+	relation->SetLastModifiedDate( serializedRelation.iLastModifiedDate );
+
+	return relation;
+	}
+
+EXPORT_C CMdERelationDef& CMdERelation::Def() const
+	{
+	return iDef;
+	}
+
+
+EXPORT_C TItemId CMdERelation::LeftObjectId() const
+	{
+	return iLeftObjectId;
+	}
+
+
+EXPORT_C TItemId CMdERelation::RightObjectId() const
+	{
+	return iRightObjectId;
+	}
+	
+EXPORT_C TInt32 CMdERelation::Parameter() const
+	{
+	return iParameter;
+	}
+
+EXPORT_C void CMdERelation::SetParameter(TInt32 aParameter)
+	{
+	iParameter = aParameter;
+	}
+	
+EXPORT_C void CMdERelation::SetLeftObjectIdL( TItemId aLeftObjectId )
+	{
+	// Same object cannot be on both side of the relation
+	if( aLeftObjectId == iRightObjectId )
+		{
+		User::Leave( KErrArgument );
+		}
+
+	iLeftObjectId = aLeftObjectId;
+	}
+
+EXPORT_C void CMdERelation::SetRightObjectIdL( TItemId aRightObjectId )
+	{
+	// Same object cannot be on both side of the relation
+	if( aRightObjectId == iLeftObjectId )
+		{
+		User::Leave( KErrArgument );
+		}
+
+	iRightObjectId = aRightObjectId;
+	}
+
+EXPORT_C void CMdERelation::Guid(TInt64& aGuidHigh, TInt64& aGuidLow) const
+	{
+	aGuidHigh = iGuidHigh;
+	aGuidLow = iGuidLow;
+	}
+
+EXPORT_C void CMdERelation::SetGuid(const TInt64& aGuidHigh, const TInt64& aGuidLow)
+	{
+	iGuidHigh = aGuidHigh;
+	iGuidLow = aGuidLow;
+	}
+
+EXPORT_C TTime CMdERelation::LastModifiedDate() const
+	{
+	return iLastModifiedDate;
+	}
+
+EXPORT_C void CMdERelation::SetLastModifiedDate(TTime aLastModifiedDate)
+	{
+	iLastModifiedDate = aLastModifiedDate;
+	}
+
+TUint32 CMdERelation::RequiredBufferSize() const
+	{
+	return sizeof(TMdCRelation);
+	}
+
+TMdCOffset CMdERelation::SerializeL(CMdCSerializationBuffer& aBuffer, TMdCOffset aFreespaceOffset) const
+	{
+	TMdCRelation relation;
+	relation.iId = Id();
+	relation.iDefId = iDef.Id();
+	relation.iLeftObjectId = iLeftObjectId;
+	relation.iRightObjectId = iRightObjectId;
+	relation.iParameter = iParameter;
+	relation.iGuidHigh = iGuidHigh;
+	relation.iGuidLow = iGuidLow;
+	relation.iLastModifiedDate = iLastModifiedDate;
+	
+	relation.SerializeL( aBuffer );
+	return aFreespaceOffset;
+	}
+
+TMdEInstanceType CMdERelation::InstanceType() const
+	{
+	return EMdETypeRelation;
+	}