Application: gvSIG desktop

/*

 * Created on 10-abr-2006

 *

 * gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana

 *

 * Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2

 * of the License, or (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,USA.

 *

 * For more information, contact:

 *

 *  Generalitat Valenciana

 *   Conselleria d'Infraestructures i Transport

 *   Av. Blasco Ib??ez, 50

 *   46010 VALENCIA

 *   SPAIN

 *

 *      +34 963862235

 *   gvsig@gva.es

 *      www.gvsig.gva.es

 *

 *    or

 *

 *   IVER T.I. S.A

 *   Salamanca 50

 *   46005 Valencia

 *   Spain

 *

 *   +34 963163400

 *   dac@iver.es

 */

/* CVS MESSAGES:

 *

 * $Id: 

 * $Log: 

 */

package org.gvsig.topology.topologyrules.jtsisvalidrules;

import org.gvsig.fmap.core.FGeometryUtil;

import org.gvsig.jts.JtsUtil;

import org.gvsig.topology.AbstractTopologyRule;

import org.gvsig.topology.Messages;

import org.gvsig.topology.Topology;

import org.gvsig.topology.TopologyError;

import org.gvsig.topology.TopologyRuleDefinitionException;

import com.hardcode.gdbms.driver.exceptions.ReadDriverException;

import com.iver.cit.gvsig.fmap.core.IFeature;

import com.iver.cit.gvsig.fmap.core.IGeometry;

import com.iver.cit.gvsig.fmap.core.v02.FConverter;

import com.iver.cit.gvsig.fmap.layers.FLyrVect;

import com.iver.utiles.XMLEntity;

import com.vividsolutions.jts.geom.Geometry;

import com.vividsolutions.jts.geom.GeometryCollection;

import com.vividsolutions.jts.geom.LineString;

import com.vividsolutions.jts.geom.MultiPolygon;

import com.vividsolutions.jts.geom.Polygon;

/**

 * This rule checks it two rings in a polygon of a polygon layer

 * are equivalent.

 * @author Alvaro Zabala

 *

 */

public class PolygonMustNotHaveDuplicatedRings extends AbstractTopologyRule {

        private double snapTolerance;

        public PolygonMustNotHaveDuplicatedRings(Topology topology, FLyrVect lyr, double tolerance){

                super(topology, lyr);

                this.snapTolerance = tolerance;

        }

        public PolygonMustNotHaveDuplicatedRings(FLyrVect lyr, double tolerance){

                this(null, lyr, tolerance);

        }

        public String getName() {

                return Messages.getText("POLYGON_MUST_NOT_HAVE_DUPLICATED_RINGS");

        }

        public void checkPreconditions() throws TopologyRuleDefinitionException {

                int shapeType;

                try {

                        shapeType = this.originLyr.getShapeType();

                        int numDimensions = FGeometryUtil.getDimensions(shapeType);

                        if(numDimensions != 2)

                                throw new TopologyRuleDefinitionException("MustNotHaveDuplicatedRings solo aplica sobre capas de dimension 2");

                } catch (ReadDriverException e) {

                        throw new TopologyRuleDefinitionException(

                                        "Error al tratar de verificar el tipo de geometria");

                }

        }

        public void validateFeature(IFeature feature) {

                Geometry jtsGeo = feature.getGeometry().toJTSGeometry();

                if (jtsGeo instanceof Polygon) {

                        Polygon polygon = (Polygon) jtsGeo;

                        checkRings(polygon, feature);

                } else if (jtsGeo instanceof MultiPolygon) {

                        MultiPolygon multiPoly = (MultiPolygon)jtsGeo;

                        for(int i = 0; i < multiPoly.getNumGeometries(); i++){

                                Polygon polygon = (Polygon) multiPoly.getGeometryN(i);

                                checkRings(polygon, feature);

                        }

                }else if(jtsGeo instanceof GeometryCollection){

                        MultiPolygon multiPoly = JtsUtil.convertIfPossible((GeometryCollection) jtsGeo);

                        for(int i = 0; i < multiPoly.getNumGeometries(); i++){

                                Polygon polygon = (Polygon) multiPoly.getGeometryN(i);

                                checkRings(polygon, feature);

                        }

                }

        }

        private void checkRings(Polygon polygon, IFeature feature){

                LineString shell = polygon.getExteriorRing();

                int numHoles = polygon.getNumInteriorRing();

                for(int i = 0; i < numHoles; i++){

                        LineString hole = polygon.getInteriorRingN(i);

                        if(shell.equalsExact(hole, snapTolerance)){

                                IFeature[] features = {feature};

                                IGeometry geometry = FConverter.jts_to_igeometry(hole);

                                TopologyError error = new TopologyError(geometry,

                                                                                                                this, 

                                                                                                                features);

                                addTopologyError(error);

                        }//if

                        for(int j = 0; j < numHoles; j++){

                                if(i >= j)

                                        continue;

                                LineString hole2 = polygon.getInteriorRingN(j);

                                if(hole.equalsExact(hole2)){

                                        IFeature[] features = {feature};

                                        IGeometry geometry = FConverter.jts_to_igeometry(hole);

                                        TopologyError error = new TopologyError(geometry,

                                                                                                                        this, 

                                                                                                                        features);

                                        addTopologyError(error);

                                }

                        }

                }//for

        }

        public XMLEntity getXMLEntity(){

                XMLEntity xml = super.getXMLEntity();

                xml.putProperty("snapTolerance", snapTolerance);

                return xml;

        }

        public void setXMLEntity(XMLEntity xml){

                super.setXMLEntity(xml);

                if(xml.contains("snapTolerance")){

                        snapTolerance = xml.getDoubleProperty("snapTolerance");

                }

        }

}