/*

* Copyright (c) 2004 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:  callback interface for sort.

*

*/

#ifndef I_ALFSORTFUNCTION

#define I_ALFSORTFUNCTION

// CLASS DECLARATIONS

namespace Alf

    {

class IAlfMap;

/**

 * callback- interface for sort.

 * 

 * @since S60 ?S60_version  

 * @status Draft

 */

class IAlfSortFunction

    {

public:

    /**

     * compares two leafs

     *

     * @param aFirst first parameter for comparison

     * @param aSecond second parameter for comparison

     * @return < 0, if aFirst is less than aSecond, > 0 if aFirst is more than aSecond,

                0, if aFirst equals aSecond.

     * @since S60 ?S60_version

     */ 

    virtual int compareLeafs( const IAlfMap* aFirst, const IAlfMap* aSecond ) const = 0;

    };

    }

#endif

// End of File