001 //$HeadURL: svn+ssh://rbezema@svn.wald.intevation.org/deegree/base/tags/2.1/src/org/deegree/model/spatialschema/Ring.java $
002 /*---------------- FILE HEADER ------------------------------------------
003
004 This file is part of deegree.
005 Copyright (C) 2001-2006 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
045 package org.deegree.model.spatialschema;
046
047 /**
048 *
049 * defining a ring geometry that's part of a surface boundary
050 *
051 * <p>----------------------------------------------------------------------<p>
052 *
053 * @author Andreas Poth
054 * @author Axel Schaefer
055 * @version $Revision: 6259 $ $Date: 2007-03-20 10:15:15 +0100 (Di, 20 Mär 2007) $
056 * <p>
057 */
058
059 public interface Ring extends OrientableCurve {
060
061 /**
062 * returns true because a ring is always a cycle
063 */
064 public boolean isCycle();
065
066 /**
067 * returns true because a ring is always a simple
068 */
069 public boolean isSimple();
070
071 /**
072 * returns all positions the builds the ring
073 */
074 public Position[] getPositions();
075
076 /**
077 * returns the ring as an instance of <tt>CurveSegment</tt>
078 */
079 public CurveSegment getAsCurveSegment() throws GeometryException;
080
081 /**
082 * @link aggregationByValue
083 * @clientCardinality 3..*
084 */
085 }
086 /* ********************************************************************
087 Changes to this class. What the people have been up to:
088 $Log$
089 Revision 1.5 2006/07/12 14:46:15 poth
090 comment footer added
091
092 ********************************************************************** */