/*

* Copyright (c) 2006 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* which accompanies this distribution, and is available

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:  Geographical base class definition.

*

*/

#ifndef LBTGEOAREABASE_H

#define LBTGEOAREABASE_H

#include <e32base.h>

#include <s32strm.h>

/**

 * Base class for geographical area.

 *

 * @lib lbt.lib

 *

 * @since S60 5.1

 */

class CLbtGeoAreaBase : public CBase

    {

public:

    /** 

     * Type of geographical area

     */

    enum TGeoAreaType

        {

        ECircle = 1,    ///<Circular area

        ERectangular = 2,     ///<Rectangular area

        };

    /**

     * Destructor

     */

    IMPORT_C virtual ~CLbtGeoAreaBase();

    /**

     * Gets the type of the geographical area

     * 

     * @return The type of geographical area.

     */

    virtual TGeoAreaType Type() const = 0;

    /**

     * Internalizes the trigger condition object's details and attributes 

     * from stream.

     *

     * The presence of this function means that the standard templated 

     * operator>>() ( defined in s32strm.h ) is available to internalize objects 

     * of this class.

     *

     * @param[in] aStream Stream from which the object should be internalized.

     */

    IMPORT_C void InternalizeL( RReadStream& aStream );

    /**

     * Externalizes the trigger condition object's details and attributes

     * to stream.

     *

     * The presence of this function means that the standard templated 

     * operator<<() ( defined in s32strm.h ) is available to externalize objects 

     * of this class.

     *

     * @param[in] aStream Stream to which the object should be externalized.

     */

    IMPORT_C void ExternalizeL( RWriteStream& aStream ) const;

protected:

    /**

     * Default constructor

     */  

    CLbtGeoAreaBase();

    /**

     * Internalize method that subclass must implement.

     * @param[in] aStream Stream from which the object should be internalized.

     */

    virtual void DoInternalizeL( RReadStream& aStream ) = 0;

    /**

     * Externalize method that subclass must implement.

     * @param[in] aStream Stream to which the object should be externalized.

     */

    virtual void DoExternalizeL( RWriteStream& aStream ) const = 0;

private:

    /**

     * By default, prohibit copy constructor

     */

    CLbtGeoAreaBase( const CLbtGeoAreaBase& );

    /**

     * Prohibit assigment operator

     */

    CLbtGeoAreaBase& operator= ( const CLbtGeoAreaBase& );

    };

#endif //LBTGEOAREABASE_H