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#ifndef __com_sun_star_configuration_backend_Layer_idl__
#define __com_sun_star_configuration_backend_Layer_idl__

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

#ifndef __com_sun_star_configuration_backend_XCompositeLayer_idl__
#include <com/sun/star/configuration/backend/XCompositeLayer.idl>
#endif

#ifndef __com_sun_star_util_XTimeStamped_idl__
#include <com/sun/star/util/XTimeStamped.idl>
#endif

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

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

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

/**
  provides read-only access to a configuration data layer.

  <p> A layer contains the configuration setting changes to be performed
  on a default settings tree to obtain the values of those settings
  for a given entity and component.
  </p>

  @see com::sun::star::configuration::backend::Schema
        Service providing access to schema data for a configuration component.

  @see com::sun::star::configuration::backend::UpdatableLayer
        Service providing write access to a configuration data layer.

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

    /**
      provides read access to the contents of the configuration layer.
      */
    interface XLayer ;

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

    /**
      provides read access to sublayers accessible through an 
      additional criterion (for instance the locale they contain data for).
      */
    [optional] interface XCompositeLayer ;

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

    /** 
      provides a way to detect changes to the layer.

      <p> Timestamps should be considered as opaque markers and 
      can only safely be compared for equality and 
      only to timestamps generated by the same implementation. 
      When the content of the Layer changes, 
      the timestamp is guaranteed to change to a different value.
      </p>
      <p> The timestamp format depends on the implementation. 
      If the timestamp is a representation of the time of the last change, 
      the recommended format is "YYYYMMDDhhmmssZ".
      </p>
      */
    [optional] interface com::sun::star::util::XTimeStamped ;
    
    //--------------------------------------------------------------------------
    
    /**
      The URL of the layer data.

      @since OOo 2.0
      */
    [property,optional,readonly] string URL ;

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

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

} ; } ; } ; } ; } ;

#endif

