/*+
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* Copyright (c) 2002-2006 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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*/+
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+
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+
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#ifndef C_CFCONTEXTQUERYIMPL_H+
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#define C_CFCONTEXTQUERYIMPL_H+
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+
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#include "cfcontextquery.h"    // defs type & source lengths+
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+
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class RWriteStream;+
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class RReadStream;+
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+
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/**+
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* CCFContextQuery implementation.+
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*+
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* @lib CFServices.lib+
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* @since S60 5.0+
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*/+
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NONSHARABLE_CLASS( CCFContextQueryImpl ): public CCFContextQuery+
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    {+
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            +
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    public:+
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    +
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        /**+
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        * Two phased constructor.+
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        * Takes a source and type of the queried context as+
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        * a parameter.+
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        *+
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        * @since S60 5.0+
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        * @param aSource Context source.+
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        * @param aType Context Type.+
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        * @return CCFContextQuery*+
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        */+
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        IMPORT_C static CCFContextQueryImpl* NewL( const TDesC& aSource,+
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            const TDesC& aType );+
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        IMPORT_C static CCFContextQueryImpl* NewLC( const TDesC& aSource,+
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            const TDesC& aType );+
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            +
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        // Destructor+
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        ~CCFContextQueryImpl();+
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    +
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    public: // From base classes+
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    +
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        // @see CCFContextQuery+
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        void SetTypeL( const TDesC& aType );+
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			+
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        // @see CCFContextQuery+
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        const TDesC& Type() const;+
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			+
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        // @see CCFContextQuery+
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        void SetSourceL( const TDesC& aSource );+
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			+
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        // @see CCFContextQuery+
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        const TDesC& Source() const;+
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			+
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        // @see CCFContextQuery+
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        void SetSubTypeMatch( TBool aMatchSubTypes );+
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			+
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        // @see CCFContextQuery+
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        TBool SubTypeMatch() const;+
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			+
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    public:+
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+
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        /**+
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        * Internalizes object.+
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        *+
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        * @since S60 5.0+
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        * @param aStream Stream from which to internalize.+
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        * @return None.+
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        */+
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        IMPORT_C void InternalizeL( RReadStream& aStream );+
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+
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        /**+
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        * Externalizes object.+
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        * +
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        * @since S60 5.0+
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        * @param aStream Stream where to externalize.+
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        * @return None+
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        */+
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        IMPORT_C void ExternalizeL( RWriteStream& aStream );+
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+
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        /**+
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        * Gets object size in bytes.+
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        *+
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        * @since S60 5.0+
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        * @param None+
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        * @return TInt+
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        */+
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        IMPORT_C TInt Size() const;+
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+
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        /**+
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        * Checks if a context source and context type matches this query.+
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        * +
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        * @since S60 5.0+
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        * @param aContextType Context type to match.+
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        * @param aContextSource Context source to match.+
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        * @return ETrue if a match.+
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        */+
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        IMPORT_C TBool Matches( const TDesC& aContextType, +
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            const TDesC& aContextSource ) const;+
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+
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        /**+
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        * Checks if a particular query matches a context source,+
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        * context type and sub type match.+
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        * +
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        * @since S60 5.0+
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        * @param aQuery Query to match with.+
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        * @param aContextType Context type to match with query.+
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        * @param aContextSource Context source to match with query.+
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        * @param aMatchSubTypes Match sub types flag.+
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        * @return ETrue if a match.+
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        */+
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        IMPORT_C static TBool MatchesQuery( const CCFContextQuery& aQuery,+
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			const TDesC& aContextType,+
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			const TDesC& aContextSource,+
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			TBool aMatchSubTypes );+
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+
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        /**+
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        * Checks if tow queries are the same.+
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        *+
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        * @since S60 5.0+
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        * @param aQuery1 First query.+
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        * @param aQuery2 Second query.+
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        * @return ETrue if a match.+
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        */+
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        IMPORT_C static TBool IsSame( const CCFContextQuery& aQuery1,+
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			const CCFContextQuery& aQuery2 );+
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			+
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    private:+
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    +
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        CCFContextQueryImpl();+
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        void ConstructL( const TDesC& aSource, const TDesC& aType );+
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+
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    private: // Data+
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+
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        /** +
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        * The (URI or semantic description of the) source from which the+
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        * context originates.+
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        */+
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        HBufC* iSource;+
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+
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        /**+
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        * One context category description.+
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        * Example: <code>Environment.Temperature</code>+
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        */+
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        HBufC* iType;+
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+
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        /**+
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        * Are subtypes are matched by this query.+
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        */+
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        TBool iMatchSubTypes;+
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    };+
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+
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#endif+
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