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// Copyright (c) 2002-2009 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:
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//
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#ifndef __LOGFILTQ__
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#define __LOGFILTQ__
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#include <badesca.h>
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#include <logwrap.h>
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#include "LogDynBuf.h"
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#include "LogCliServShared.h"
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// Classes referenced
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class CLogFilter;
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class CLogFilterList;
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class MLogServDatabaseTransactionInterface;
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/**
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This class provides only one public method (apart from constructor) - BuildExprLC().
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BuildExprLC() accepts as an input parameter a list with view filters and constructs from them
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a "WHERE" SQL expression that is returned to the caller into the RLogDynBuf output parameter.
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@see CLogFilterList
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@see RLogDynBuf
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@see MLogServDatabaseTransactionInterface
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@internalComponent
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*/
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class TLogFilterExprBuilder
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{
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public:
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TLogFilterExprBuilder(MLogServDatabaseTransactionInterface& aDatabase);
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void BuildExprLC(RLogDynBuf& aExpr, const CLogFilterList& aFilterList, const TDesC& aInitial,
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TLogFilterConstructionType aType = ELogFilterConstructFilterByFilterFieldByField);
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private:
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void DoNextProcessFilterByFilterFieldByFieldL(RLogDynBuf& aExpr);
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void DoNextProcessFieldByFieldFilterByFilterL(RLogDynBuf& aExpr);
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void MakePredicatesL();
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void MakeConditionL(RLogDynBuf& aExpr);
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void MakeFlagPredicatesL();
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const TDesC& ColumnName() const;
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void MakeNullPredicate(TDes& aDes);
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void MakePredicateL(TDes& aDes, const CLogFilter& aFilter);
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TBool IsDuplicateNullField() const;
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TBool IsDuplicateField(const CLogFilter& aFilter) const;
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TBool IsFieldEmpty(const CLogFilter& aFilter) const;
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TBool IsDuplicate(const CLogFilter& aFilter1, const CLogFilter& aFilter2) const;
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void Invariant() const;
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private:
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MLogServDatabaseTransactionInterface& iDatabase;
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const CLogFilterList* iFilterList;
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const TDesC* iInitial;
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TLogFilterConstructionType iConstructionType;
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TInt iFilterIndex;
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TUint16 iField; //It must be 16-bit. The iField value is read from a resource file.
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//See CLogServRecentCondition::ConstructL() implementation.
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//The iField type width then restricts the max number of field macro values -
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//ELogContactField...ELogSimIdField.
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TInt iFlagIndex;
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CDesCArrayFlat* iPredicateList;
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};
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#endif
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