| gvSIG desktop 1

/*

 * Created on 19-sep-2007

 *

 * 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: SnapRepeatedPointTester.java 14147 2007-09-27 19:02:04Z azabala $

* $Log: SnapRepeatedPointTester.java,v $

* Revision 1.1  2007/09/19 16:37:49  azabala

* first version in cvs

*

*

*/

package org.gvsig.jts;

import java.util.Collection;

import com.iver.cit.gvsig.util.SnappingCoordinateMap;

import com.vividsolutions.jts.algorithms.SnapCGAlgorithms;

import com.vividsolutions.jts.geom.Coordinate;

import com.vividsolutions.jts.geom.Geometry;

import com.vividsolutions.jts.geom.GeometryCollection;

import com.vividsolutions.jts.geom.MultiPoint;

/**

 * RepeatedPointTester implementation that consideers a snap tolerance

 * (points that are at a distance lower than the snap tolerance are consideered

 * the same point)

 * 

 * @author azabala

 *

 */

public class SnapRepeatedPointTester extends RepeatedPointTester {

        private double snapTolerance;

        private SnappingCoordinateMap repeatedCoords;

        /**

         * Constructor 

         * @param snapTolerance

         */

        public SnapRepeatedPointTester(double snapTolerance) {

                repeatedCoords = new SnappingCoordinateMap(snapTolerance);

                this.snapTolerance = snapTolerance;

        }

        public Collection<Coordinate> getRepeatedCoordinates() {

                return repeatedCoords.values();

        }

        public void clear(){

                repeatedCoords.clear();

        }

        public boolean hasRepeatedPoint(Coordinate[] coords) {

                boolean solution = false;

                for (int i = 1; i < coords.length; i++) {

                        Coordinate previousCoord = coords[i - 1];

                        Coordinate coord = coords[i];

                        if(SnapCGAlgorithms.snapEquals2D(previousCoord, coord, snapTolerance)){

                                if(repeatedCoords.get(coords[i]) == null)

                                        repeatedCoords.put(coords[i], coords[i]);

                                solution = true;

                        }

                }// for

                return solution;

        }

        public Geometry removeRepeatedPoints(Geometry g){

                if(g instanceof GeometryCollection){

                        if(! (g instanceof MultiPoint))

                                return removeRepeatedPoints((GeometryCollection)g);

                }

                Coordinate[] coords = g.getCoordinates();

                SnapCoordinateList coordList = new SnapCoordinateList(coords, snapTolerance, false);

                Coordinate[] correctedCoords = coordList.toCoordinateArray();

                return JtsUtil.createGeometry(correctedCoords, g.getGeometryType());

        }

}