sl@0: // Copyright (c) 2002-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: // All rights reserved.
sl@0: // This component and the accompanying materials are made available
sl@0: // under the terms of "Eclipse Public License v1.0"
sl@0: // which accompanies this distribution, and is available
sl@0: // at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: //
sl@0: // Initial Contributors:
sl@0: // Nokia Corporation - initial contribution.
sl@0: //
sl@0: // Contributors:
sl@0: //
sl@0: // Description:
sl@0: //
sl@0: 
sl@0: #ifndef __LOGFILTQ__
sl@0: #define __LOGFILTQ__
sl@0: 
sl@0: #include <badesca.h>
sl@0: #include <logwrap.h>
sl@0: #include "LogDynBuf.h"
sl@0: #include "LogCliServShared.h"
sl@0: 
sl@0: // Classes referenced
sl@0: class CLogFilter;
sl@0: class CLogFilterList;
sl@0: class MLogServDatabaseTransactionInterface;
sl@0: 
sl@0: /**
sl@0: This class provides only one public method (apart from constructor) - BuildExprLC().
sl@0: BuildExprLC() accepts as an input parameter a list with view filters and constructs from them
sl@0: a "WHERE" SQL expression that is returned to the caller into the RLogDynBuf output parameter. 
sl@0: 
sl@0: @see CLogFilterList
sl@0: @see RLogDynBuf
sl@0: @see MLogServDatabaseTransactionInterface
sl@0: @internalComponent
sl@0: */
sl@0: class TLogFilterExprBuilder
sl@0: 	{
sl@0: public:
sl@0:     TLogFilterExprBuilder(MLogServDatabaseTransactionInterface& aDatabase);
sl@0: 	void BuildExprLC(RLogDynBuf& aExpr, const CLogFilterList& aFilterList, const TDesC& aInitial, 
sl@0:                      TLogFilterConstructionType aType = ELogFilterConstructFilterByFilterFieldByField);
sl@0: 	
sl@0: private:
sl@0: 	void DoNextProcessFilterByFilterFieldByFieldL(RLogDynBuf& aExpr);
sl@0: 	void DoNextProcessFieldByFieldFilterByFilterL(RLogDynBuf& aExpr);
sl@0: 	void MakePredicatesL();
sl@0: 	void MakeConditionL(RLogDynBuf& aExpr);
sl@0: 	void MakeFlagPredicatesL();
sl@0: 	const TDesC& ColumnName() const;
sl@0:     void MakeNullPredicate(TDes& aDes);
sl@0: 	void MakePredicateL(TDes& aDes, const CLogFilter& aFilter);
sl@0:     TBool IsDuplicateNullField() const;
sl@0: 	TBool IsDuplicateField(const CLogFilter& aFilter) const;
sl@0: 	TBool IsFieldEmpty(const CLogFilter& aFilter) const;
sl@0: 	TBool IsDuplicate(const CLogFilter& aFilter1, const CLogFilter& aFilter2) const;
sl@0: 	void Invariant() const;
sl@0: 
sl@0: private:
sl@0: 	MLogServDatabaseTransactionInterface& iDatabase;
sl@0:     const CLogFilterList* iFilterList;
sl@0:     const TDesC* iInitial;
sl@0:     TLogFilterConstructionType iConstructionType;
sl@0: 	TInt iFilterIndex;
sl@0: 	TUint16 iField; //It must be 16-bit. The iField value is read from a resource file. 
sl@0: 					//See CLogServRecentCondition::ConstructL() implementation. 
sl@0: 					//The iField type width then restricts the max number of field macro values - 
sl@0: 					//ELogContactField...ELogSimIdField. 
sl@0: 	TInt iFlagIndex;
sl@0:     CDesCArrayFlat* iPredicateList;
sl@0: 	};
sl@0: 
sl@0: #endif