| gvSIG desktop 1

/*

 * 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.errorfixes;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.List;

import org.gvsig.exceptions.BaseException;

import org.gvsig.fmap.core.NewFConverter;

import org.gvsig.jts.JtsUtil;

import org.gvsig.jts.SnapLineStringSelfIntersectionChecker;

import org.gvsig.topology.Messages;

import org.gvsig.topology.TopologyError;

import com.hardcode.gdbms.engine.values.Value;

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

import com.iver.cit.gvsig.fmap.core.FMultiPoint2D;

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

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

import com.vividsolutions.jts.geom.Geometry;

import com.vividsolutions.jts.geom.LinearRing;

import com.vividsolutions.jts.geom.MultiPoint;

import com.vividsolutions.jts.geom.Polygon;

public class SplitSelfIntersectingPolygonFix extends SplitSelfIntersectingLineFix {

        public List<IFeature>[] fixAlgorithm(TopologyError error) throws BaseException {

                double clusterTolerance = error.getTopology().getClusterTolerance();

                IGeometry selfIntersectingPoints = error.getGeometry();

                FMultiPoint2D shape = (FMultiPoint2D) selfIntersectingPoints.

                                                                                                        getInternalShape();

                MultiPoint selfIntersections = (MultiPoint)NewFConverter.toJtsGeometry(shape);

                IFeature originFeature = error.getFeature1();

                Value[] attributes = originFeature.getAttributes();

                IGeometry originGeometry = originFeature.getGeometry();

                Geometry jtsGeo = originGeometry.toJTSGeometry();

                Polygon[] polygons = JtsUtil.extractPolygons(jtsGeo);

                for(int i = 0; i < polygons.length; i++){

                        Polygon polygon = polygons[i];

                        if(!polygon.disjoint(selfIntersections)){

                                List<LinearRing> shells = new ArrayList<LinearRing>();

                                List<LinearRing> holes = new ArrayList<LinearRing>();

                                LinearRing shell = (LinearRing) polygon.getExteriorRing();

                                SnapLineStringSelfIntersectionChecker checker =

                                        new SnapLineStringSelfIntersectionChecker(shell, clusterTolerance);

                                Geometry[] splittedGeometries = checker.clean();

//                                shells.addAll((Collection<? extends LinearRing>) Arrays.asList(splittedGeometries));

                                for(int k = 0; k < splittedGeometries.length; k++){ 

                                        shells.add((LinearRing)splittedGeometries[k]);

                }

                                for(int j = 0; j < polygon.getNumInteriorRing(); j++){

                                        LinearRing hole = (LinearRing) polygon.getInteriorRingN(j);

                                        checker = new SnapLineStringSelfIntersectionChecker(hole, 

                                                                                                                        clusterTolerance);

                                        splittedGeometries = checker.clean();

//                                        shells.addAll((Collection<? extends LinearRing>) Arrays.asList(splittedGeometries));

                                        for(int k = 0; k < splittedGeometries.length; k++){ 

                                                shells.add((LinearRing)splittedGeometries[k]);

                        }

                                }

                                Geometry editedGeometry = JtsUtil.buildPolygons(shells, holes);

                                Polygon[] correctedPolygons = JtsUtil.extractPolygons(editedGeometry);

                                IFeature[] newFeatures = new IFeature[correctedPolygons.length];

                                for(int j = 0; j < correctedPolygons.length; j++){

                                        Polygon pol = correctedPolygons[j];

                                        IGeometry igeom = NewFConverter.toFMap(pol);

                                        newFeatures[j] =  new DefaultFeature(igeom, 

                                                                                                        attributes, 

                                                                                                        originFeature.getID()+j);

                                }

                                List<IFeature> editedFeatures = new ArrayList<IFeature>();

                                editedFeatures.addAll(Arrays.asList(newFeatures));

                                return (List<IFeature>[]) new List[]{editedFeatures};

                        }//if ! disjoints

                }

                return null;

        }

        public String getEditionDescription() {

                return Messages.getText("SPLIT_SELFINTERSECTING_POLYGON_FIX");

        }

}