/*

* Copyright (c) 2006-2007 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:  Class representing a search condition

*

*/

#ifndef C_SEARCHCONDITION_H

#define C_SEARCHCONDITION_H

#include <e32base.h>

#include <s32strm.h>

/**

 *  Abstract base class for all search conditions.

 *

 *  All concrete conditions must derive from this class.

 *

 *  @lib searchutilities.lib

 */

class CSearchCondition : public CBase

    {

public:

	/**  Condition type can be one of following types */

    enum TConditionType

        {

        EConditionTypeSimple = 0x1,

        EConditionTypeBoolean = 0x2

        };

    /**

     * Destructor

     */

     IMPORT_C virtual ~CSearchCondition();

    /**

     * Returns type of the condition

     * @return TConditionType  

     */

     IMPORT_C TConditionType Type() const;

    /**

     * Externalize function

     *

     * @param aStream - stream

     */

     IMPORT_C virtual void ExternalizeL( RWriteStream& aStream ) const;

    /**

     * Returns the extension for this interface. If no extension is available, return NULL.

     *

     * @param aExtensionUid Uid of the extension.

     * @return TAny*

     */

     virtual TAny* ConditionExtensionL( TUid /*aExtensionUid*/ ) { return NULL; }

protected:

    /**

     * constructor

     *

     * @param aType - Condition type

     */

     CSearchCondition( const TConditionType& aType );

private: // Data

    /**

     * Condition type

     */

     TConditionType iType;

    /**

     * Reserved for extension

     */

     TAny* iReservedExtension;

    };

#endif // C_SEARCHCONDITION_H