metadataengine/client/src/mdequerycriteriaserialization.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Mon, 15 Mar 2010 12:42:24 +0200
branchRCL_3
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permissions -rw-r--r--
Revision: 201009 Kit: 201010
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/*
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* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). 
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:  Serialize query criteria
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*
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*/
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#include "mdequerycriteriaserialization.h"
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#include "mdelogiccondition.h"
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#include "mdepropertydef.h"
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#include "mdenamespacedef.h"
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#include "mdeobjectdef.h"
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#include "mdcquery.h"
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#include "mdcserializationbuffer.h"
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CMdEQueryCriteriaSerialization* CMdEQueryCriteriaSerialization::NewL(
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	TQueryResultMode aResultMode, TQueryType aQueryType, 
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	CMdENamespaceDef& aNamespaceDef, 
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	CMdEObjectDef* aObjectDef, RPointerArray<CMdEObjectDef>* aObjectDefs, 
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	TUint32 aLimit, TUint32 aOffset, TUint32 aQueryOptimizationFlags,
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	CMdELogicCondition& aRootCondition, RArray<TMdEOrderRule>& aOrderRule, 
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	RPointerArray<CMdEPropertyDef>* aPropertyFilter)
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	{
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    CMdEQueryCriteriaSerialization* serialization = 
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    	CMdEQueryCriteriaSerialization::NewLC( aResultMode, aQueryType,
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    										   aNamespaceDef, aObjectDef, aObjectDefs, 
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    										   aLimit, aOffset, aQueryOptimizationFlags,
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    										   aRootCondition, aOrderRule,
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    										   aPropertyFilter );
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    CleanupStack::Pop( serialization );
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    return serialization;
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    }
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CMdEQueryCriteriaSerialization* CMdEQueryCriteriaSerialization::NewLC(
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	TQueryResultMode aResultMode, TQueryType aQueryType, 
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	CMdENamespaceDef& aNamespaceDef, 
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	CMdEObjectDef* aObjectDef, RPointerArray<CMdEObjectDef>* aObjectDefs, 
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	TUint32 aLimit, TUint32 aOffset, TUint32 aQueryOptimizationFlags, 
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	CMdELogicCondition& aRootCondition, RArray<TMdEOrderRule>& aOrderRule, 
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	RPointerArray<CMdEPropertyDef>* aPropertyFilter)
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	{
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    CMdEQueryCriteriaSerialization* serialization = 
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    	new( ELeave ) CMdEQueryCriteriaSerialization( ETrue ); // Owns serialized buffer
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    CleanupStack::PushL( serialization );
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    serialization->ConstructL( aResultMode, aQueryType,
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    						   aNamespaceDef, aObjectDef, aObjectDefs, 
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    						   aLimit, aOffset, aQueryOptimizationFlags,
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    						   aRootCondition, aOrderRule,
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    						   aPropertyFilter );
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    return serialization;
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	}
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CMdEQueryCriteriaSerialization* CMdEQueryCriteriaSerialization::NewL(
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	CMdCSerializationBuffer& aSerializationBuffer)
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	{
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    CMdEQueryCriteriaSerialization* serialization = 
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    	CMdEQueryCriteriaSerialization::NewLC( aSerializationBuffer );
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    CleanupStack::Pop( serialization );
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    return serialization;
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	}
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CMdEQueryCriteriaSerialization* CMdEQueryCriteriaSerialization::NewLC(
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	CMdCSerializationBuffer& aSerializationBuffer)
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	{
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    CMdEQueryCriteriaSerialization* serialization = 
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    	new( ELeave ) CMdEQueryCriteriaSerialization( EFalse ); // Doesn't own serialized buffer
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    CleanupStack::PushL( serialization );
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    serialization->iSerializedBuffer = &aSerializationBuffer;
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    return serialization;
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	}
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CMdEQueryCriteriaSerialization::~CMdEQueryCriteriaSerialization()
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	{
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	if( iOwnSerializedBuffer )
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		{
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		delete iSerializedBuffer;
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		}
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	}
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TPtr8 CMdEQueryCriteriaSerialization::Buffer() const
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	{
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	return iSerializedBuffer->Buffer();
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	}
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const TPtr8* CMdEQueryCriteriaSerialization::BufferPtr() const
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	{
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	return iSerializedBuffer->BufferPtr();
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	}
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CMdCSerializationBuffer& CMdEQueryCriteriaSerialization::SerializationBuffer()
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	{
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	return *iSerializedBuffer;
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	}
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CMdEQueryCriteriaSerialization::CMdEQueryCriteriaSerialization(TBool aOwnSerializedBuffer)
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	: iSerializedBuffer( NULL ), iOwnSerializedBuffer( aOwnSerializedBuffer )
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	{
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	}
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   112
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void CMdEQueryCriteriaSerialization::ConstructL(
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	TQueryResultMode aResultMode, TQueryType aQueryType, 
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	CMdENamespaceDef& aNamespaceDef, 
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	CMdEObjectDef* aObjectDef, RPointerArray<CMdEObjectDef>* aObjectDefs, 
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	TUint32 aLimit, TUint32 aOffset, TUint32 aQueryOptimizationFlags, 
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	CMdELogicCondition& aRootCondition, RArray<TMdEOrderRule>& aOrderRules, 
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	RPointerArray<CMdEPropertyDef>* aPropertyFilter)
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	{
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	// If aResultMode is EModeDistinctValues aQueryType must be CMdEQuery::ETypeObject
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	if( EQueryResultModeDistinctValues == aResultMode )
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		{
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		if( EQueryTypeObject != aQueryType )
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			{
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			User::Leave( KErrNotSupported );
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			}
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		else
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			{
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			// Order rules might also contain one order rule and it must be 
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			// same as defined in propery condition.
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			if( aOrderRules.Count() > 1 )
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				{
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				User::Leave( KErrCompletion );
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				}
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			// One property filter must exist and it must be same as property condition
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			if( aPropertyFilter )
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				{
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				if( aPropertyFilter->Count() != 1 )
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					{
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					User::Leave( KErrCompletion );
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					}
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				}
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			else
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				{
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				User::Leave( KErrCompletion);
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				}
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			}
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		}
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	TUint32 criteriaBufferSize = sizeof( TMdCSearchCriteria );
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	// Required size for object defs IDs
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	TUint32 objectDefIdCount = 0;
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	if( aObjectDefs )
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		{
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		objectDefIdCount = aObjectDefs->Count();
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		criteriaBufferSize += objectDefIdCount * 
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				CMdCSerializationBuffer::KRequiredSizeForTDefId;
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		}
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	// Required size for conditions
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	criteriaBufferSize += aRootCondition.RequiredBufferSize();
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	// Required size for order rule offsets
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	const TInt orderRuleCount = aOrderRules.Count();
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	criteriaBufferSize += orderRuleCount * 
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			CMdCSerializationBuffer::KRequiredSizeForTUint32;
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	// Required size for order rules
7
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	for( TInt i = orderRuleCount - 1; i >=0; i-- )
0
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		{
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		criteriaBufferSize += aOrderRules[i].RequiredBufferSize();
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		}
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	// Required size for property filters
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	TUint32 propertyFilterCount = 0;
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	if( aPropertyFilter )
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		{
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		propertyFilterCount = aPropertyFilter->Count();
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   183
		
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		criteriaBufferSize += propertyFilterCount * 
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			CMdCSerializationBuffer::KRequiredSizeForTDefId;
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		}
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	// Reserve buffer
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	iSerializedBuffer = CMdCSerializationBuffer::NewL( criteriaBufferSize );
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	// Insert data to search criteria
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   192
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	TMdCSearchCriteria criteria;
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	criteria.iQueryResultType = aResultMode;
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	criteria.iQueryType = aQueryType;
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	criteria.iNamespaceDefId = aNamespaceDef.Id();
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   197
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	if( aObjectDef )
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   199
		{
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		criteria.iObjectDefId = aObjectDef->Id();
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		}
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	else
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		{
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		criteria.iObjectDefId = KNoDefId;
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		}
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   206
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	criteria.iObjectDefIds.iPtr.iCount = objectDefIdCount;
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	// init offset to "zero", will be updated later if needed
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	criteria.iObjectDefIds.iPtr.iOffset = KNoOffset;
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   210
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	criteria.iLimit = aLimit;
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	criteria.iOffset = aOffset;
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	criteria.iOptimizationFlags = aQueryOptimizationFlags;
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   214
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	// init offset to "zero", will be updated later
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	criteria.iRootCondition = KNoOffset;
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   217
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	criteria.iOrderRules.iPtr.iCount = orderRuleCount;
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	// init offset to "zero", will be updated later if needed
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	criteria.iOrderRules.iPtr.iOffset = KNoOffset;
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   221
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	criteria.iPropertyFilters.iPtr.iCount = propertyFilterCount;
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	// init offset to "zero", will be updated later if needed
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	criteria.iPropertyFilters.iPtr.iOffset = KNoOffset;
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   225
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	// Insert data to serialized buffer
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   227
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	// Position after search criteria
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	const TUint32 afterCriteriaOffset = sizeof( TMdCSearchCriteria );
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	// Move to position after search criteria
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	iSerializedBuffer->PositionL( afterCriteriaOffset );
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   233
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	if( aObjectDefs )
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		{
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		// Update object defs offset to search criteria
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		criteria.iObjectDefIds.iPtr.iOffset = afterCriteriaOffset;
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		// Update object defs count
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		for( TUint32 i = 0; i < objectDefIdCount; i++ )
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			{
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			TDefId defId = (*aObjectDefs)[i]->Id();
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			iSerializedBuffer->InsertL( defId );
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			}
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		}
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	// Update root condition offset to position after search criteria 
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	// (and possible object defs IDs)
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	criteria.iRootCondition = iSerializedBuffer->Position();
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	TUint32 offset = KNoOffset;
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	// Insert root condition to serialized buffer
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	aRootCondition.SerializeL( *iSerializedBuffer, offset );
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	// move position after conditions
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	iSerializedBuffer->PositionL( offset );
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   257
	
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	if( orderRuleCount > 0 )
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		{
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		// Update order rule offset to position after search criteria 
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		// (and possible object defs IDs) and root condition
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		criteria.iOrderRules.iPtr.iOffset = iSerializedBuffer->Position();
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   263
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		for( TUint32 i = 0; i < orderRuleCount; i++)
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			{
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			// Insert current order rule
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			aOrderRules[i].SerializeL( *iSerializedBuffer, offset );
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			}
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		}
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	// move position after order rules
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	iSerializedBuffer->PositionL( offset );
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   273
	
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	if( aPropertyFilter )
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		{
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		// Update order property filter offset to position after search 
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		// criteria (and possible object defs IDs), 
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		// root condition and order rules
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		criteria.iPropertyFilters.iPtr.iOffset = iSerializedBuffer->Position();
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		for( TUint32 i = 0; i < propertyFilterCount; i++ )
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			{
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			CMdEPropertyDef* propertyDef = (*aPropertyFilter)[i];
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			iSerializedBuffer->InsertL( propertyDef->Id() );
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			}
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		}
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	// move buffer to begin and serialize search criteria
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	iSerializedBuffer->PositionL( KNoOffset );
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	criteria.SerializeL( *iSerializedBuffer );
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	}