/*

* Copyright (c) 2007-2009 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: This file defines class MESMRFieldStorage.

*

*/

#ifndef MESMRFIELDSTORAGE_H

#define MESMRFIELDSTORAGE_H

#include <e32std.h>

class MESMRCalEntry;

class CESMRField;

/**

 * Pure virtual class to be inherited by field storage classes.

 */

class MESMRFieldStorage

    {

public:

    virtual ~MESMRFieldStorage(){}

public:

    /**

     * Returns the count for all the fields in the storage

     *

     * @return TInt - field count

     */

    virtual TInt Count() const = 0;

    /**

     * Returns field for given index.

     *

     * @param aInd - index of the wanted field.

     * @return CESMRField pointer

     */

    virtual CESMRField* Field( TInt aInd ) const = 0;

    /**

     * Returns field for given field id.

     * 

     * @param aId field id

     * @return CESMRField poiter or NULL. 

     */

    virtual CESMRField* FieldById( TESMREntryFieldId aId ) const = 0;

    /**

     * Called in the construction phase to set needed

     * entry informations to fields.

     *

     * @param aEntry - contains needed information.

     */

    virtual void InternalizeL( MESMRCalEntry& aEntry ) = 0;

    /**

     * Called when editing the entry is done. Information from edited fields

     * is collected to aEntry.

     *

     * @param aEntry - entry where all the edited information is stored

     */

    virtual void ExternalizeL( MESMRCalEntry& aEntry ) = 0;

    /**

     * Validates the content of fields

     *

     * @param aId Field id where focus is set if validation fails

     * @param aForceValidate ETrue if force validation is used

     * @return TInt

     */

    virtual TInt Validate( 

    		TESMREntryFieldId& aId, 

    		TBool aForceValidate = EFalse ) = 0;

    };

#endif