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#ifndef __com_sun_star_configuration_backend_LayerFilter_idl__
#define __com_sun_star_configuration_backend_LayerFilter_idl__

#ifndef __com_sun_star_configuration_backend_XLayer_idl__
#include <com/sun/star/configuration/backend/XLayer.idl>
#endif

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

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

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

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

/**
  provides a filtered version of a configuration data <type>Layer</type>.

  <p> A layer filter wraps a source <type>XLayer</type> object and 
     provides access to a filtered version of its data.
     The data read from the filter usually is produced from the source data 
     by adding and removing elements or modifying values.
  </p>

  @see com::sun::star::configuration::backend::DataImporter
        Service that supports applying a <type>LayerFilter</type> to imported data.

  @since OOo 2.0
  */
published service LayerFilter
{
    //--------------------------------------------------------------------------

    /**
      provides read access to the filtered contents.

      <p> Method <member>XLayer::readData</member> will render a filtered version 
         of the data produced by the same method of the source object.
     </p>
      */
    interface XLayer ;

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

    /**
      provides a means to set the source data for the filter.
      
      <p> Call <method scope="com::sun::star::lang">XInitialization::initialize</method>()
         with a single argument of type <type scope="com::sun::star::beans">NamedValue</type>,
         where <member scope="com::sun::star::beans">NamedValue::Name</member> is <code>"Source"</code>
         and <member scope="com::sun::star::beans">NamedValue::Value</member> 
         is an object implementing <type>XLayer</type>.
     </p>
      */
    interface com::sun::star::lang::XInitialization ;

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

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

} ; } ; } ; } ; } ;

#endif

