/*

 * Copyright (c) 2002-2007 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:  Virtual Phonebook field selector interface needed 

 *                by e.g. CVPbkFieldFilter.

 *

 */

 #ifndef MVPBKCONTACTFIELDSELECTOR_H

 #define MVPBKCONTACTFIELDSELECTOR_H

 // INCLUDES

 #include <e32cmn.h>

 // FORWARD DECLARATIONS

 class MVPbkBaseContactField;

 // CLASS DECLARATIONS

 /**

  * Virtual Phonebook Contact field selector interface.

  * This interface can be used to create a selection object, which

  * can determine which fields belong to the set criteria.

  */

 class MVPbkContactFieldSelector

     {

     public:

         /**

          * Returns true if aField belongs to the set defined by this field

          * selector.

          * 

          * In case field is an IMPP field service name is compared to 

          * existing service installations. Only matched IMPP service

          * providers are included.

          * 

          * @param aField    Contact field to check againt criteria.

          * @return ETrue if the field is included in the set.

          */

         virtual TBool IsFieldIncluded(

                 const MVPbkBaseContactField& aField) const =0;

         /**

          * Returns an extension point for this interface or NULL.

          * @param aExtensionUid Uid of extension

          * @return Extension point or NULL

          */

         virtual TAny* ContactFieldSelectorExtension(

                 TUid /*aExtensionUid*/) { return NULL; }

     protected:

         /**

          * Destructor.

          */

         virtual ~MVPbkContactFieldSelector() { }

     };

 #endif  // MVPBKCONTACTFIELDSELECTOR_H

 //End of file