/*$************************************************************************************************ ** ** $Id: Shell.java,v 1.3 2004/03/09 20:02:56 desruisseaux Exp $ ** ** $Source: /cvsroot/geoapi/src/org/opengis/spatialschema/geometry/primitive/Shell.java,v $ ** ** Copyright (C) 2003 Open GIS Consortium, Inc. All Rights Reserved. http://www.opengis.org/Legal/ ** *************************************************************************************************/package org.opengis.spatialschema.geometry.primitive;// OpenGIS direct dependenciesimport org.opengis.spatialschema.geometry.complex.CompositeSurface;/** * Represents a single connected component of a {@linkplain SolidBoundary solid boundary}. * A shell consists of a number of references to {@linkplain OrientableSurface orientable * surfaces} connected in a topological cycle (an object whose boundary is empty). Unlike a * {@linkplain Ring ring}, a <code>Shell</code>'s elements have no natural sort order. Like * {@linkplain Ring rings}, <code>Shell</code>s are simple. * * @UML type GM_Shell * @author ISO/DIS 19107 * @author <A HREF="http://www.opengis.org">OpenGIS&reg; consortium</A> * @version 2.0 * * @see SolidBoundary * @see Ring */public interface Shell extends CompositeSurface {    /**     * Always returns <code>true</code> since shell objects are simples.     *     * @return Always <code>true</code>.     */    public boolean isSimple();}