Source Code Cross Referenced for GM_Ring.java in  » GIS » GeOxygene-1.3 » fr » ign » cogit » geoxygene » spatial » geomprim » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » GIS » GeOxygene 1.3 » fr.ign.cogit.geoxygene.spatial.geomprim 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * This file is part of the GeOxygene project source files. 
003:         * 
004:         * GeOxygene aims at providing an open framework which implements OGC/ISO specifications for 
005:         * the development and deployment of geographic (GIS) applications. It is a open source 
006:         * contribution of the COGIT laboratory at the Institut Géographique National (the French 
007:         * National Mapping Agency).
008:         * 
009:         * See: http://oxygene-project.sourceforge.net 
010:         *  
011:         * Copyright (C) 2005 Institut Géographique National
012:         *
013:         * This library is free software; you can redistribute it and/or modify it under the terms
014:         * of the GNU Lesser General Public License as published by the Free Software Foundation; 
015:         * either version 2.1 of the License, or any later version.
016:         *
017:         * This library is distributed in the hope that it will be useful, but WITHOUT ANY 
018:         * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A 
019:         * PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
020:         *
021:         * You should have received a copy of the GNU Lesser General Public License along with 
022:         * this library (see file LICENSE if present); if not, write to the Free Software 
023:         * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
024:         *  
025:         */
026:
027:        package fr.ign.cogit.geoxygene.spatial.geomprim;
028:
029:        import fr.ign.cogit.geoxygene.spatial.coordgeom.DirectPosition;
030:        import fr.ign.cogit.geoxygene.spatial.geomcomp.GM_CompositeCurve;
031:
032:        /**
033:         * Représente un composant d'une GM_SurfaceBoundary. 
034:         * Un GM_Ring est une GM_CompositeCurve fermée, c'est-à-dire des références vers des GM_OrientableCurve connectées en un cycle.
035:         *
036:         * @author Thierry Badard & Arnaud Braun
037:         * @version 1.0
038:         *
039:         */
040:
041:        public class GM_Ring extends GM_CompositeCurve {
042:
043:            /** Constructeur par défaut */
044:            public GM_Ring() {
045:                super ();
046:            }
047:
048:            /** Constructeur à partir d'une et d'une seule GM_OrientableCurve.
049:             * Ne vérifie pas la fermeture. */
050:            public GM_Ring(GM_OrientableCurve oriCurve) {
051:                super (oriCurve);
052:            }
053:
054:            /** Constructeur à partir d'une et d'une seule GM_OrientableCurve.
055:             * Vérifie la fermeture, d'où le paramètre tolérance. Exception si ca ne ferme pas.*/
056:            // TO DO : un nouveau type d'exception
057:            public GM_Ring(GM_OrientableCurve oriCurve, double tolerance)
058:                    throws Exception {
059:                super (oriCurve);
060:                GM_Curve c = (GM_Curve) oriCurve.getPrimitive();
061:                DirectPosition pt1 = c.startPoint();
062:                DirectPosition pt2 = c.endPoint();
063:                if (!pt1.equals(pt2, tolerance))
064:                    throw new Exception(
065:                            "tentative de créer un GM_Ring avec une courbe non fermée");
066:            }
067:
068:            /** Constructeur à partir d'une courbe composée (cast). 
069:             * Ne vérifie ni la fermeture, ni le chainage. */
070:            public GM_Ring(GM_CompositeCurve compCurve) {
071:                super ();
072:                this .generator = compCurve.getGenerator();
073:                this .primitive = compCurve.getPrimitive();
074:                this .proxy[0] = compCurve.getPositive();
075:                this .proxy[1] = compCurve.getNegative();
076:            }
077:
078:            /** Constructeur à partir d'une courbe composée (cast). 
079:             * Vérifie la fermeture et le chainage sinon exception. */
080:            public GM_Ring(GM_CompositeCurve compCurve, double tolerance)
081:                    throws Exception {
082:                super ();
083:                this .generator = compCurve.getGenerator();
084:                this .primitive = compCurve.getPrimitive();
085:                this .proxy[0] = compCurve.getPositive();
086:                this .proxy[1] = compCurve.getNegative();
087:                if (!super .validate(tolerance))
088:                    throw new Exception(
089:                            "new GM_Ring(): La courbe composée passée en paramètre n'est pas chaînée");
090:                if (!this .validate(tolerance))
091:                    throw new Exception(
092:                            "new GM_Ring(): La courbe composée passée en paramètre ne ferme pas.");
093:            }
094:
095:            /** Méthode pour vérifier qu'on a un chainage, et que le point initial est bien égal au point final. 
096:             * Surcharge de la méthode validate sur GM_CompositeCurve. 
097:             * Renvoie TRUE si c'est le cas, FALSE sinon.*/
098:            public boolean validate(double tolerance) {
099:                if (!super .validate(tolerance))
100:                    return false;
101:                GM_CurveBoundary bdy = (GM_CurveBoundary) this .boundary();
102:                if (bdy.getStartPoint().getPosition().equals(
103:                        bdy.getEndPoint().getPosition(), tolerance))
104:                    return true;
105:                else
106:                    return false;
107:            }
108:        }
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