/*$************************************************************************************************
 **
 ** $Id: OrientableSurface.java 831 2006-05-01 00:27:23Z Desruisseaux $
 **
 ** $URL: http://svn.code.sf.net/p/geoapi/code/branches/2.0.x/geoapi/src/main/java/org/opengis/spatialschema/geometry/primitive/OrientableSurface.java $
 **
 ** Copyright (C) 2003-2005 Open GIS Consortium, Inc.
 ** All Rights Reserved. http://www.opengis.org/legal/
 **
 *************************************************************************************************/
package org.opengis.spatialschema.geometry.primitive;

// OpenGIS direct dependencies
import org.opengis.spatialschema.geometry.complex.CompositeSurface;

// Annotations
import org.opengis.annotation.UML;
import static org.opengis.annotation.Obligation.*;
import static org.opengis.annotation.Specification.*;


/**
 * A surface and an orientation inherited from {@link OrientablePrimitive}. If the orientation is
 * positive, then the {@code OrientableSurface} is a {@linkplain Surface surface}. If the
 * orientation is negative, then the {@code OrientableSurface} is a reference to a
 * {@linkplain Surface surface} with an upNormal that reverses the direction for this
 * {@code OrientableSurface}, the sense of "the top of the surface".
 *  
 * @version Abstract specification 5
 * @author Martin Desruisseaux (IRD)
 * @since GeoAPI 1.0
 */
@UML(identifier="GM_OrientableSurface", specification=ISO_19107)
public interface OrientableSurface extends OrientablePrimitive {
    /**
     * Returns the set of circular sequences of {@linkplain OrientableCurve orientable curve} that
     * limit the extent of this {@code OrientableSurface}. These curves shall be organized
     * into one circular sequence of curves for each boundary component of the
     * {@code OrientableSurface}. In cases where "exterior" boundary is not
     * well defined, all the rings of the {@linkplain SurfaceBoundary surface boundary}
     * shall be listed as "interior".
     *
     * 

     * NOTE: The concept of exterior boundary for a surface is really only
     * valid in a 2-dimensional plane. A bounded cylinder has two boundary components, neither
     * of which can logically be classified as its exterior. Thus, in 3 dimensions, there is no
     * valid definition of exterior that covers all cases.
     * 
     *
     * @return The sets of positions on the boundary.
     */
/// @UML(identifier="boundary", obligation=MANDATORY, specification=ISO_19107)
/// public SurfaceBoundary getBoundary();

    /**
     * Returns the owner of this orientable surface, or {@code null} if none.
     *
     * @return The owner of this orientable surface, or {@code null} if none.
     *
     * @todo I'm not sure to interpret correctly the ISO specification.
     *       Sound like ISO returns an array (or a sequence) here.
     */
    @UML(identifier="composite", obligation=OPTIONAL, specification=ISO_19107)
    public CompositeSurface getComposite();
}