/*************************************************************************
 *
 *  OpenOffice.org - a multi-platform office productivity suite
 *
 *  $RCSfile: LayerUpdateMerger.idl,v $
 *
 *  $Revision: 1.5 $
 *
 *  last change: $Author: rt $ $Date: 2005-09-07 22:32:33 $
 *
 *  The Contents of this file are made available subject to
 *  the terms of GNU Lesser General Public License Version 2.1.
 *
 *
 *    GNU Lesser General Public License Version 2.1
 *    =============================================
 *    Copyright 2005 by Sun Microsystems, Inc.
 *    901 San Antonio Road, Palo Alto, CA 94303, USA
 *
 *    This library is free software; you can redistribute it and/or
 *    modify it under the terms of the GNU Lesser General Public
 *    License version 2.1, as published by the Free Software Foundation.
 *
 *    This library is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *    Lesser General Public License for more details.
 *
 *    You should have received a copy of the GNU Lesser General Public
 *    License along with this library; if not, write to the Free Software
 *    Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 *    MA  02111-1307  USA
 *
 ************************************************************************/
#ifndef __com_sun_star_configuration_backend_LayerUpdateMerger_idl__
#define __com_sun_star_configuration_backend_LayerUpdateMerger_idl__

#ifndef __com_sun_star_lang_XInitialization_idl__
#include <com/sun/star/lang/XInitialization.idl>
#endif

#ifndef __com_sun_star_configuration_backend_XUpdateHandler_idl__
#include <com/sun/star/configuration/backend/XUpdateHandler.idl>
#endif

//=============================================================================

module com { module sun { module star { module configuration { module backend {

//=============================================================================

/**
    applies updates to a configuration layer.

    <p> The configuration layer data is read from a <type>XLayer</type>
    and the changed layer is provided as <type>XLayer</type> again or
    described to a <type>XLayerHandler</type>.
    </p>

    @see com::sun::star::configuration::backend::UpdatableLayer
        Service describes a layer and accepts a changed layer..

    @since OOo 1.1.2
*/
published service LayerUpdateMerger
{
    //-------------------------------------------------------------------------

    /** accepts events describing the changes.
      */
    interface com::sun::star::configuration::backend::XUpdateHandler ;

    //-------------------------------------------------------------------------

    /** allows initializing layer data source and target.

        <p> Both source and target of the update can be provided by passing a
            <type>XUpdatableLayer</type> object. Alternatively they can be
            provided individually by providing a <type>XLayer</type> object as
            data source and an <type>XLayerHandler</type> object to receive the
            updated data.
        </p>
        <p> Implementations can provide more arguments to finetune the behavior.
            Such arguments are provided as
            <type scope="com::sun::star::beans">NamedValue</type>.
            Implementations should support the following named arguments:
        <dl>
            <dt><code>Overwrite</code> : <atom>boolean</atom></dt>
            <dd>If <FALSE/>, specifies that changes should be applied
                only if the existing layer is empty.
            </dd>
            <dt><code>Truncate</code> : <atom>boolean</atom></dt>
            <dd>If <TRUE/> requests that changes should not be merged onto
                existing data, but that the changes should be applied
                to a layer that is completely empty.
            </dd>
        </dl>
        </p>
      */
    interface com::sun::star::lang::XInitialization ;

    //-------------------------------------------------------------------------
} ;

//=============================================================================

} ; } ; } ; } ; } ;

#endif
