001 //$HeadURL: svn+ssh://rbezema@svn.wald.intevation.org/deegree/base/branches/2.2_testing/src/org/deegree/model/spatialschema/Ring.java $
002 /*---------------- FILE HEADER ------------------------------------------
003
004 This file is part of deegree.
005 Copyright (C) 2001-2008 by:
006 EXSE, Department of Geography, University of Bonn
007 http://www.giub.uni-bonn.de/deegree/
008 lat/lon GmbH
009 http://www.lat-lon.de
010
011 This library is free software; you can redistribute it and/or
012 modify it under the terms of the GNU Lesser General Public
013 License as published by the Free Software Foundation; either
014 version 2.1 of the License, or (at your option) any later version.
015
016 This library is distributed in the hope that it will be useful,
017 but WITHOUT ANY WARRANTY; without even the implied warranty of
018 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
019 Lesser General Public License for more details.
020
021 You should have received a copy of the GNU Lesser General Public
022 License along with this library; if not, write to the Free Software
023 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
024
025 Contact:
026
027 Andreas Poth
028 lat/lon GmbH
029 Aennchenstr. 19
030 53115 Bonn
031 Germany
032 E-Mail: poth@lat-lon.de
033
034 Prof. Dr. Klaus Greve
035 Department of Geography
036 University of Bonn
037 Meckenheimer Allee 166
038 53115 Bonn
039 Germany
040 E-Mail: greve@giub.uni-bonn.de
041
042
043 ---------------------------------------------------------------------------*/
044 package org.deegree.model.spatialschema;
045
046 /**
047 *
048 *
049 *
050 * @author <a href="mailto:poth@lat-lon.de">Andreas Poth</a>
051 * @author last edited by: $Author: apoth $
052 *
053 * @version. $Revision: 9343 $, $Date: 2007-12-27 14:30:32 +0100 (Do, 27 Dez 2007) $
054 */
055 public interface Ring extends OrientableCurve {
056
057 /**
058 * @return true because a ring is always a cycle
059 */
060 public boolean isCycle();
061
062 /**
063 * @return true because a ring is always a simple
064 */
065 public boolean isSimple();
066
067 /**
068 * @return all positions the builds the ring
069 */
070 public Position[] getPositions();
071
072 /**
073 * @return the ring as an instance of <tt>CurveSegment</tt>
074 */
075 public CurveSegment getAsCurveSegment()
076 throws GeometryException;
077
078 /**
079 *
080 * @return CurveSegments a Ring is build from
081 */
082 public CurveSegment[] getCurveSegments();
083 }