root / trunk / libraries / libTopology / src / org / gvsig / jts / SnapRepeatedPointTester.java @ 23048
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1 | 13888 | azabala | /*
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2 | * Created on 19-sep-2007
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3 | *
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4 | * gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
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5 | *
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6 | * Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.
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7 | *
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8 | * This program is free software; you can redistribute it and/or
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9 | * modify it under the terms of the GNU General Public License
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10 | * as published by the Free Software Foundation; either version 2
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11 | * of the License, or (at your option) any later version.
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12 | *
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13 | * This program is distributed in the hope that it will be useful,
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14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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16 | * GNU General Public License for more details.
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17 | *
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18 | * You should have received a copy of the GNU General Public License
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19 | * along with this program; if not, write to the Free Software
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20 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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21 | *
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22 | * For more information, contact:
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23 | *
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24 | * Generalitat Valenciana
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25 | * Conselleria d'Infraestructures i Transport
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26 | * Av. Blasco Ib??ez, 50
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27 | * 46010 VALENCIA
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28 | * SPAIN
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29 | *
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30 | * +34 963862235
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31 | * gvsig@gva.es
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32 | * www.gvsig.gva.es
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33 | *
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34 | * or
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35 | *
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36 | * IVER T.I. S.A
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37 | * Salamanca 50
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38 | * 46005 Valencia
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39 | * Spain
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40 | *
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41 | * +34 963163400
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42 | * dac@iver.es
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43 | */
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44 | /* CVS MESSAGES:
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45 | *
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46 | * $Id$
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47 | 14147 | azabala | * $Log: SnapRepeatedPointTester.java,v $
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48 | * Revision 1.1 2007/09/19 16:37:49 azabala
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49 | 13888 | azabala | * first version in cvs
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50 | *
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51 | *
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52 | */
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53 | package org.gvsig.jts; |
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54 | |||
55 | import java.util.Collection; |
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56 | |||
57 | import com.iver.cit.gvsig.util.SnappingCoordinateMap; |
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58 | import com.vividsolutions.jts.algorithms.SnapCGAlgorithms; |
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59 | import com.vividsolutions.jts.geom.Coordinate; |
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60 | import com.vividsolutions.jts.geom.Geometry; |
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61 | import com.vividsolutions.jts.geom.GeometryCollection; |
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62 | import com.vividsolutions.jts.geom.MultiPoint; |
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63 | |||
64 | /**
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65 | * RepeatedPointTester implementation that consideers a snap tolerance
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66 | * (points that are at a distance lower than the snap tolerance are consideered
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67 | * the same point)
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68 | *
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69 | * @author azabala
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70 | *
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71 | */
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72 | public class SnapRepeatedPointTester extends RepeatedPointTester { |
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73 | |||
74 | private double snapTolerance; |
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75 | |||
76 | private SnappingCoordinateMap repeatedCoords;
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77 | |||
78 | /**
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79 | * Constructor
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80 | * @param snapTolerance
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81 | */
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82 | public SnapRepeatedPointTester(double snapTolerance) { |
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83 | repeatedCoords = new SnappingCoordinateMap(snapTolerance);
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84 | this.snapTolerance = snapTolerance;
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85 | } |
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86 | |||
87 | 14147 | azabala | public Collection<Coordinate> getRepeatedCoordinates() { |
88 | 13888 | azabala | return repeatedCoords.values();
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89 | } |
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90 | |||
91 | public void clear(){ |
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92 | repeatedCoords.clear(); |
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93 | } |
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94 | |||
95 | |||
96 | public boolean hasRepeatedPoint(Coordinate[] coords) { |
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97 | boolean solution = false; |
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98 | for (int i = 1; i < coords.length; i++) { |
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99 | Coordinate previousCoord = coords[i - 1];
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100 | Coordinate coord = coords[i]; |
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101 | if(SnapCGAlgorithms.snapEquals2D(previousCoord, coord, snapTolerance)){
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102 | if(repeatedCoords.get(coords[i]) == null) |
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103 | repeatedCoords.put(coords[i], coords[i]); |
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104 | solution = true;
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105 | } |
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106 | }// for
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107 | return solution;
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108 | } |
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109 | |||
110 | |||
111 | public Geometry removeRepeatedPoints(Geometry g){
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112 | |||
113 | if(g instanceof GeometryCollection){ |
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114 | if(! (g instanceof MultiPoint)) |
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115 | return removeRepeatedPoints((GeometryCollection)g);
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116 | } |
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117 | Coordinate[] coords = g.getCoordinates();
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118 | SnapCoordinateList coordList = new SnapCoordinateList(coords, snapTolerance, false); |
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119 | Coordinate[] correctedCoords = coordList.toCoordinateArray();
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120 | return JtsUtil.createGeometry(correctedCoords, g.getGeometryType());
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121 | } |
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122 | |||
123 | } |