svn-gvsig-desktop / tags / v1_1_Build_1013 / extensions / extGeoProcessing / src / com / iver / cit / gvsig / geoprocess / impl / dissolve / fmap / DissolveVisitor.java @ 13521
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1 | 5918 | azabala | /*
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2 | * Created on 24-feb-2006
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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 | * $Log$
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48 | 12556 | azabala | * Revision 1.2.2.1 2007-07-12 09:28:45 azabala
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49 | * optimizations in dissolution of buffered features (we dont use strategies to avoid reading of geometries already processed)
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50 | *
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51 | * Revision 1.2 2006/07/27 17:21:06 azabala
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52 | 6551 | azabala | * *** empty log message ***
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53 | *
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54 | * Revision 1.1 2006/06/20 18:20:45 azabala
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55 | 5918 | azabala | * first version in cvs
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56 | *
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57 | * Revision 1.3 2006/06/08 18:24:43 azabala
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58 | * modificaciones para admitir capas de shapeType MULTI
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59 | *
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60 | * Revision 1.2 2006/06/02 18:21:28 azabala
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61 | * *** empty log message ***
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62 | *
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63 | * Revision 1.1 2006/05/24 21:11:14 azabala
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64 | * primera version en cvs despues de refactoring orientado a crear un framework extensible de geoprocessing
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65 | *
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66 | * Revision 1.5 2006/05/08 15:37:26 azabala
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67 | * added alphanumeric dissolve
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68 | *
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69 | * Revision 1.4 2006/05/01 19:14:30 azabala
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70 | * comentario
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71 | *
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72 | * Revision 1.3 2006/03/15 18:33:24 azabala
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73 | * *** empty log message ***
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74 | *
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75 | * Revision 1.2 2006/03/07 21:01:33 azabala
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76 | * *** empty log message ***
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77 | *
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78 | * Revision 1.1 2006/03/06 19:48:39 azabala
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79 | * *** empty log message ***
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80 | *
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81 | * Revision 1.2 2006/03/05 19:58:30 azabala
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82 | * *** empty log message ***
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83 | *
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84 | * Revision 1.1 2006/02/26 20:54:04 azabala
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85 | * *** empty log message ***
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86 | *
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87 | *
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88 | */
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89 | package com.iver.cit.gvsig.geoprocess.impl.dissolve.fmap; |
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90 | |||
91 | import java.awt.geom.Rectangle2D; |
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92 | import java.util.ArrayList; |
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93 | import java.util.Iterator; |
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94 | import java.util.List; |
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95 | import java.util.Map; |
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96 | import java.util.Stack; |
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97 | |||
98 | import com.hardcode.gdbms.engine.data.driver.DriverException; |
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99 | import com.hardcode.gdbms.engine.values.NumericValue; |
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100 | import com.hardcode.gdbms.engine.values.Value; |
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101 | import com.hardcode.gdbms.engine.values.ValueFactory; |
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102 | import com.iver.cit.gvsig.fmap.core.DefaultFeature; |
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103 | import com.iver.cit.gvsig.fmap.core.IGeometry; |
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104 | import com.iver.cit.gvsig.fmap.core.v02.FConverter; |
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105 | import com.iver.cit.gvsig.fmap.edition.EditionException; |
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106 | import com.iver.cit.gvsig.fmap.layers.FBitSet; |
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107 | import com.iver.cit.gvsig.fmap.layers.FLayer; |
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108 | import com.iver.cit.gvsig.fmap.layers.FLyrVect; |
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109 | import com.iver.cit.gvsig.fmap.layers.SelectableDataSource; |
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110 | import com.iver.cit.gvsig.fmap.layers.layerOperations.AlphanumericData; |
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111 | import com.iver.cit.gvsig.fmap.layers.layerOperations.VectorialData; |
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112 | import com.iver.cit.gvsig.fmap.operations.strategies.FeatureVisitor; |
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113 | import com.iver.cit.gvsig.fmap.operations.strategies.Strategy; |
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114 | import com.iver.cit.gvsig.fmap.operations.strategies.VisitException; |
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115 | import com.iver.cit.gvsig.geoprocess.core.fmap.FeatureProcessor; |
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116 | import com.iver.cit.gvsig.geoprocess.core.fmap.SummarizationFunction; |
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117 | import com.iver.cit.gvsig.geoprocess.core.fmap.XTypes; |
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118 | import com.vividsolutions.jts.geom.Geometry; |
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119 | import com.vividsolutions.jts.geom.GeometryFactory; |
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120 | |||
121 | /**
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122 | * <p>
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123 | * This FeatureVisitor processes each geometry of a polygon layer, looks for
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124 | * adjacent polygons and verify values of a dissolve field. If these values are
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125 | * coincident, it creates a new polygon by unioning original polygons. Also
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126 | * applies a sumarization function to numeric fields of original features.
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127 | * </p>
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128 | *
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129 | * @author azabala
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130 | *
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131 | */
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132 | public class DissolveVisitor implements FeatureVisitor { |
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133 | |||
134 | /**
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135 | * Allows to get attributes of disolved layer features
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136 | */
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137 | protected SelectableDataSource recordset;
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138 | |||
139 | /**
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140 | * Is used to do spatial querys (looking for adjacent polygons to visited
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141 | * feature geometry
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142 | */
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143 | protected FLyrVect dissolvedLayer;
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144 | |||
145 | /**
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146 | * Field which adjacent features must have the same value to dissolve them
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147 | */
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148 | protected String dissolveField; |
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149 | |||
150 | /**
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151 | * It marks all features that have already been dissolved (to avoid process
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152 | * them in subsecuent steps)
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153 | *
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154 | */
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155 | protected FBitSet dissolvedGeometries;
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156 | |||
157 | /**
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158 | * Relates a numerical field name with its sumarization functions
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159 | */
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160 | protected Map numericField_sumarizeFunction; |
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161 | |||
162 | /**
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163 | * Processes results of dissolve operations (save them in a file, or cache
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164 | * them in memory, etc)
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165 | */
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166 | protected FeatureProcessor featureProcessor;
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167 | |||
168 | /**
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169 | * Strategy of the layer we want to dissolve
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170 | */
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171 | protected Strategy strategy;
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172 | /**
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173 | * Index of the result
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174 | */
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175 | protected int fid = 0; |
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176 | |||
177 | /**
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178 | * Constructor
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179 | * @param dissolveField
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180 | * @param processor
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181 | */
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182 | public DissolveVisitor(String dissolveField, FeatureProcessor processor) { |
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183 | this.dissolveField = dissolveField;
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184 | this.featureProcessor = processor;
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185 | dissolvedGeometries = new FBitSet();
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186 | } |
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187 | |||
188 | public int getNumProcessedGeometries() { |
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189 | return dissolvedGeometries.cardinality();
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190 | } |
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191 | 12556 | azabala | |
192 | public FBitSet getDissolvedGeometries(){
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193 | return dissolvedGeometries;
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194 | } |
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195 | 5918 | azabala | |
196 | public void setDissolvedAttributesInfo(Map numericField_sumFunction) { |
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197 | this.numericField_sumarizeFunction = numericField_sumFunction;
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198 | } |
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199 | |||
200 | /*
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201 | * Algorithm to compute dissolve is strongly based in depth first algorithm
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202 | * to traverse graphs.
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203 | *
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204 | * It puts features to dissolve in a stack. While stack is not empty, get
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205 | * Features and looks for adjacent to it. For each adjacent feature, verify
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206 | * its dissolve field value, and if it is similar to feature to dissolve
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207 | * with, obtain a new feature by unioning their geometries and by applying
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208 | * sumarization functions to its numeric attributes. For each adjacent
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209 | * feature, put it in the Stack
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210 | */
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211 | public void visit(IGeometry g, int index) throws VisitException { |
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212 | if(g == null) |
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213 | return;
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214 | if(g.getGeometryType() != XTypes.POLYGON &&
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215 | g.getGeometryType() != XTypes.MULTI) |
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216 | return;
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217 | if (!dissolvedGeometries.get(index)) {
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218 | // if we havent dissolved this feature
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219 | Stack toDissol = new Stack();// stack for adjacent features |
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220 | DissolvedFeature feature; |
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221 | try {
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222 | feature = createFeature(g, index); |
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223 | toDissol.push(feature); |
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224 | ArrayList geometries = new ArrayList(); |
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225 | Value[] values = dissolveGeometries(toDissol, geometries);
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226 | Geometry geometry = union(geometries); |
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227 | Value[] valuesWithFID = new Value[values.length + 1]; |
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228 | System.arraycopy(values, 0, valuesWithFID, 1, values.length); |
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229 | valuesWithFID[0] = ValueFactory.createValue(fid);
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230 | DissolvedFeature dissolved = new DissolvedFeature(null,valuesWithFID, fid/*index*/); |
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231 | dissolved.setJtsGeometry(geometry); |
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232 | this.featureProcessor.processFeature(dissolved);
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233 | fid++; |
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234 | resetFunctions(); |
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235 | } catch (DriverException e) {
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236 | throw new VisitException( |
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237 | "Error al procesar las geometrias a fusionar durante dissolve");
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238 | } catch (com.iver.cit.gvsig.fmap.DriverException e) {
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239 | throw new VisitException( |
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240 | "Error al procesar las geometrias a fusionar durante dissolve");
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241 | } |
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242 | }// if
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243 | } |
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244 | |||
245 | /**
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246 | * Returns the union of all geometries of the list
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247 | * @param geometries
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248 | * @return
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249 | */
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250 | protected Geometry union(List geometries){ |
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251 | Geometry union = null;
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252 | Geometry[] geom = new Geometry[geometries.size()]; |
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253 | 6551 | azabala | geometries.toArray(geom); |
254 | 5918 | azabala | GeometryFactory fact = geom[0].getFactory();
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255 | 12556 | azabala | Geometry geomColl = fact.createGeometryCollection(geom); |
256 | union = geomColl.buffer(0);
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257 | 5918 | azabala | return union;
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258 | } |
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259 | 12556 | azabala | |
260 | 5918 | azabala | |
261 | /**
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262 | * FIXME Redise?ar esto, pues el codigo es similar al de Spatial Join
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263 | *
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264 | */
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265 | protected void resetFunctions() { |
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266 | if(numericField_sumarizeFunction == null) |
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267 | return;
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268 | Iterator fieldsIt = numericField_sumarizeFunction.keySet().iterator();
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269 | while (fieldsIt.hasNext()) {
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270 | String field = (String) fieldsIt.next(); |
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271 | SummarizationFunction[] functions = (SummarizationFunction[]) numericField_sumarizeFunction |
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272 | .get(field); |
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273 | for (int i = 0; i < functions.length; i++) { |
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274 | functions[i].reset(); |
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275 | }// for
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276 | }// while
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277 | } |
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278 | |||
279 | /**
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280 | * Inner class to manage dissolve geoprocess. It mantains feature info
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281 | * interesting for dissolve (int index, JTS Geometry, etc)
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282 | *
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283 | * @author azabala
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284 | *
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285 | */
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286 | protected class DissolvedFeature extends DefaultFeature { |
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287 | int index;
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288 | Geometry jtsGeometry; |
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289 | |||
290 | public DissolvedFeature(IGeometry geom, Value[] att, int index) { |
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291 | super(geom, att);
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292 | this.index = index;
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293 | } |
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294 | |||
295 | public int getIndex() { |
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296 | return index;
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297 | } |
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298 | |||
299 | public Geometry getJtsGeometry() {
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300 | return jtsGeometry;
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301 | } |
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302 | |||
303 | public void setJtsGeometry(Geometry jtsGeometry) { |
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304 | this.jtsGeometry = jtsGeometry;
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305 | } |
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306 | |||
307 | public IGeometry getGeometry() {
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308 | IGeometry solution = super.getGeometry();
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309 | if (solution == null && jtsGeometry != null) { |
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310 | solution = FConverter.jts_to_igeometry(jtsGeometry); |
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311 | } |
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312 | return solution;
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313 | } |
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314 | |||
315 | } |
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316 | |||
317 | /**
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318 | * Creates a new IFeature with util info for dissolve geoprocess (it ignore
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319 | * non numerical values, etc)
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320 | *
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321 | * @param g
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322 | * @param index
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323 | * @return
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324 | * @throws DriverException
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325 | */
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326 | protected DissolvedFeature createFeature(IGeometry g, int index) |
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327 | throws DriverException {
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328 | DissolvedFeature solution = null;
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329 | int numNumericFields = 0; |
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330 | if(numericField_sumarizeFunction != null) |
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331 | numNumericFields = numericField_sumarizeFunction.keySet().size(); |
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332 | // attributes will be dissolve field and sumarized function for
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333 | // numerical
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334 | // values
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335 | Value[] values = new Value[numNumericFields + 1]; |
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336 | if (numericField_sumarizeFunction != null){ |
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337 | Iterator fieldIt = numericField_sumarizeFunction.keySet().iterator();
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338 | int valueIndex = 0; |
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339 | while (fieldIt.hasNext()) {
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340 | String fieldName = (String) fieldIt.next(); |
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341 | int fieldIndex = recordset.getFieldIndexByName(fieldName);
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342 | values[valueIndex] = recordset.getFieldValue(index, fieldIndex); |
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343 | valueIndex++; |
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344 | } |
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345 | } |
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346 | /*
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347 | * FIXME In this case, we are dissolving with one only dissolve field.
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348 | * To work with many dissolve fields, we must to follow certain
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349 | * conventions: For example, first numeric fields, after that, dissolve
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350 | * fields
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351 | */
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352 | int dissolveField = recordset.getFieldIndexByName(this.dissolveField); |
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353 | values[numNumericFields] = recordset |
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354 | .getFieldValue(index, dissolveField); |
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355 | solution = new DissolvedFeature(g, values, index);
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356 | return solution;
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357 | } |
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358 | |||
359 | |||
360 | // // FIXME Mover esto a una utility class
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361 | // protected Geometry fastUnion(Geometry g1, Geometry g2) {
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362 | // Geometry[] geoms = new Geometry[2];
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363 | // geoms[0] = g1;
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364 | // geoms[1] = g2;
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365 | // GeometryCollection gc = g1.getFactory().createGeometryCollection(geoms);
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366 | // return gc.buffer(0d);
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367 | // }
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368 | |||
369 | protected boolean verifyIfDissolve(DissolvedFeature fet1, |
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370 | DissolvedFeature fet2) { |
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371 | Geometry jtsGeo = fet1.getJtsGeometry(); |
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372 | Geometry featureJtsGeo = fet2.getJtsGeometry(); |
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373 | //FIXME Revisar si intersects considera dos arcos adjacentes
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374 | //que no comparten nodo
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375 | if (jtsGeo.intersects(featureJtsGeo)) {// They have at least |
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376 | //a common point
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377 | |||
378 | // dissolveField is the last
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379 | int fieldIndex = 0; |
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380 | if (numericField_sumarizeFunction != null) |
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381 | fieldIndex = numericField_sumarizeFunction.keySet().size(); |
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382 | Value adjacentVal = fet1.getAttribute(fieldIndex); |
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383 | Value val = fet2.getAttribute(fieldIndex); |
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384 | if (adjacentVal.doEquals(val)) {
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385 | return true; |
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386 | }// if val equals
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387 | }// if touches
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388 | return false; |
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389 | } |
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390 | |||
391 | /**
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392 | * For each individual geometry processed in DissolveVisitor's visit method,
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393 | * this Visitor visits its adjacent polygons geometries to check dissolve
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394 | * conditions.
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395 | *
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396 | * @author azabala
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397 | *
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398 | */
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399 | protected class IndividualGeometryDissolveVisitor implements FeatureVisitor { |
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400 | /**
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401 | * Marks index of features that have been dissolved yet
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402 | */
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403 | FBitSet dissolvedFeatures; |
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404 | |||
405 | /**
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406 | * It saves all features for we are looking for adjacent geometries.
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407 | * Dissolving is similar to network tracking algorithms: one feature is
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408 | * adjacent to two, two is adjacent to four, etc We will save features
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409 | * to process in this stack
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410 | */
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411 | Stack featuresToDissolve;
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412 | |||
413 | /**
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414 | * Field use to dissolve adjacent geometries with the same value for it
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415 | *
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416 | * FIXME Change it for an evaluator of logical expresions
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417 | */
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418 | String dissolveField;
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419 | |||
420 | /**
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421 | * Maps for each numerical field its sumarization functions
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422 | */
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423 | Map fields_sumarizeFunc;
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424 | |||
425 | /**
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426 | * Feature for which we are looking for features to dissolve
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427 | */
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428 | DissolvedFeature feature; |
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429 | |||
430 | /**
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431 | * jts geometry of feature
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432 | */
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433 | private Geometry featureJtsGeo;
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434 | |||
435 | /**
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436 | * Numeric values result of a sumarization operation
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437 | */
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438 | private List sumarizedValues; |
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439 | |||
440 | /**
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441 | * Constructor
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442 | *
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443 | * @param feature
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444 | * Feature we are analizing to found its adjacents
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445 | *
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446 | * @param dissolvedFeatures
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447 | * bitset that marks all analyzed features (to not to analyze
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448 | * later)
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449 | *
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450 | * @param featuresToDissolve
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451 | * stack where we put adjacent features to analyze later
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452 | *
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453 | * @param fields_sumarize
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454 | * maps a numeric field of the solution layer with its
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455 | * sumarization functions
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456 | */
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457 | protected IndividualGeometryDissolveVisitor(DissolvedFeature feature,
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458 | FBitSet dissolvedFeatures, Stack featuresToDissolve,
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459 | Map fields_sumarize) {
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460 | this.dissolvedFeatures = dissolvedFeatures;
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461 | this.feature = feature;
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462 | this.featuresToDissolve = featuresToDissolve;
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463 | this.featureJtsGeo = feature.getGeometry().toJTSGeometry();
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464 | feature.setJtsGeometry(featureJtsGeo); |
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465 | this.sumarizedValues = new ArrayList(); |
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466 | this.fields_sumarizeFunc = fields_sumarize;
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467 | |||
468 | } |
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469 | |||
470 | public String getProcessDescription() { |
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471 | return "Dissolving a polygon with its adjacents"; |
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472 | } |
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473 | |||
474 | /**
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475 | * Applies to sumarization functions feature values.
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476 | *
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477 | * @throws DriverException
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478 | *
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479 | * FIXME Redise?ar, pues el codigo es similar al de Spatial Join
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480 | */
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481 | protected void applySumarizeFunction(int recordIndex) |
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482 | throws DriverException {
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483 | // TODO Redesing this with extensible dissolve
|
||
484 | if (fields_sumarizeFunc == null) |
||
485 | return;
|
||
486 | |||
487 | Iterator fieldsIt = fields_sumarizeFunc.keySet().iterator();
|
||
488 | while (fieldsIt.hasNext()) {
|
||
489 | String field = (String) fieldsIt.next(); |
||
490 | int fieldIndex = recordset.getFieldIndexByName(field);
|
||
491 | Value valToSumarize = recordset.getFieldValue(recordIndex, |
||
492 | fieldIndex); |
||
493 | SummarizationFunction[] functions = (SummarizationFunction[]) fields_sumarizeFunc |
||
494 | .get(field); |
||
495 | for (int i = 0; i < functions.length; i++) { |
||
496 | functions[i].process((NumericValue) valToSumarize); |
||
497 | sumarizedValues.add(functions[i].getSumarizeValue()); |
||
498 | }// for
|
||
499 | }// while
|
||
500 | } |
||
501 | |||
502 | /**
|
||
503 | * Analizes a feature (defined by g and its index) to see if it is an
|
||
504 | * adjacent feature to the given feature, and to check its dissolve
|
||
505 | * condition.
|
||
506 | *
|
||
507 | * @param g
|
||
508 | * @param index
|
||
509 | */
|
||
510 | public void visit(IGeometry g, int index) throws VisitException { |
||
511 | // Is it the feature whose adjacents we are looking for?
|
||
512 | if (index == feature.getIndex())
|
||
513 | return;
|
||
514 | // have we dissolved this feature yet?
|
||
515 | if (dissolvedFeatures.get(index))
|
||
516 | return;
|
||
517 | try {
|
||
518 | DissolvedFeature adjacentFeature = createFeature(g, index); |
||
519 | Geometry jtsGeo = g.toJTSGeometry(); |
||
520 | adjacentFeature.setJtsGeometry(jtsGeo); |
||
521 | if (verifyIfDissolve(feature, adjacentFeature)) {
|
||
522 | dissolvedFeatures.set(index); |
||
523 | |||
524 | // we actualize geometry by unioning
|
||
525 | featuresToDissolve.push(adjacentFeature); |
||
526 | // group by attributes
|
||
527 | applySumarizeFunction(index); |
||
528 | } |
||
529 | } catch (DriverException e) {
|
||
530 | throw new VisitException( |
||
531 | "Error al cargar los pol?gonos adyacentes durante un dissolve");
|
||
532 | } |
||
533 | }// visit
|
||
534 | |||
535 | public void stop(FLayer layer) { |
||
536 | } |
||
537 | |||
538 | public boolean start(FLayer layer) { |
||
539 | try {
|
||
540 | recordset = ((AlphanumericData) layer).getRecordset(); |
||
541 | this.applySumarizeFunction(feature.getIndex());
|
||
542 | |||
543 | } catch (com.iver.cit.gvsig.fmap.DriverException e) {
|
||
544 | return false; |
||
545 | } catch (DriverException e) {
|
||
546 | return false; |
||
547 | } |
||
548 | return true; |
||
549 | } |
||
550 | |||
551 | public void setFields_sumarizeFunc(Map fields_sumarizeFunc) { |
||
552 | this.fields_sumarizeFunc = fields_sumarizeFunc;
|
||
553 | } |
||
554 | |||
555 | public Map getFields_sumarizeFunc() { |
||
556 | return fields_sumarizeFunc;
|
||
557 | } |
||
558 | |||
559 | public Geometry getFeatureJtsGeo() {
|
||
560 | return featureJtsGeo;
|
||
561 | } |
||
562 | |||
563 | public Value[] getSumarizedValues() { |
||
564 | Value[] solution = new Value[sumarizedValues.size()]; |
||
565 | sumarizedValues.toArray(solution); |
||
566 | return solution;
|
||
567 | } |
||
568 | |||
569 | public Value[] getSumarizedValues2() { |
||
570 | Value[] solution = null; |
||
571 | ArrayList values = new ArrayList(); |
||
572 | if (fields_sumarizeFunc != null){ |
||
573 | Iterator fieldsIt = fields_sumarizeFunc.keySet().iterator();
|
||
574 | while (fieldsIt.hasNext()) {
|
||
575 | String field = (String) fieldsIt.next(); |
||
576 | SummarizationFunction[] functions = (SummarizationFunction[]) fields_sumarizeFunc |
||
577 | .get(field); |
||
578 | for (int i = 0; i < functions.length; i++) { |
||
579 | values.add(functions[i].getSumarizeValue()); |
||
580 | }// for
|
||
581 | }// while
|
||
582 | }//if
|
||
583 | if (dissolveField != null) { |
||
584 | try {
|
||
585 | int dissolveFieldIndex = recordset
|
||
586 | .getFieldIndexByName(dissolveField); |
||
587 | Value dissolveField = recordset.getFieldValue(feature |
||
588 | .getIndex(), dissolveFieldIndex); |
||
589 | values.add(dissolveField); |
||
590 | } catch (DriverException e) {
|
||
591 | // TODO Auto-generated catch block
|
||
592 | e.printStackTrace(); |
||
593 | } |
||
594 | } |
||
595 | solution = new Value[values.size()];
|
||
596 | values.toArray(solution); |
||
597 | return solution;
|
||
598 | } |
||
599 | |||
600 | public void setDissolveField(String dissolveField) { |
||
601 | this.dissolveField = dissolveField;
|
||
602 | |||
603 | } |
||
604 | |||
605 | public void setProcessedFeature(DissolvedFeature feature2) { |
||
606 | this.feature = feature2;
|
||
607 | |||
608 | } |
||
609 | }// IndividualDissolve
|
||
610 | |||
611 | |||
612 | |||
613 | protected Value[] dissolveGeometries(Stack toDissol, |
||
614 | List geometries) throws com.iver.cit.gvsig.fmap.DriverException, |
||
615 | VisitException { |
||
616 | |||
617 | IndividualGeometryDissolveVisitor visitor = null;
|
||
618 | DissolvedFeature feature = null;
|
||
619 | while (toDissol.size() != 0) { |
||
620 | feature = (DissolvedFeature) toDissol.pop(); |
||
621 | // flags this idx (to not to process in future)
|
||
622 | dissolvedGeometries.set(feature.getIndex()); |
||
623 | if (visitor == null) { |
||
624 | visitor = new IndividualGeometryDissolveVisitor(feature,
|
||
625 | dissolvedGeometries, toDissol, |
||
626 | numericField_sumarizeFunction); |
||
627 | visitor.setDissolveField(this.dissolveField);
|
||
628 | } else {
|
||
629 | visitor.setProcessedFeature(feature); |
||
630 | } |
||
631 | Rectangle2D bounds = feature.getGeometry().getBounds2D();
|
||
632 | double xmin = bounds.getMinX();
|
||
633 | double ymin = bounds.getMinY();
|
||
634 | double xmax = bounds.getMaxX();
|
||
635 | double ymax = bounds.getMaxY();
|
||
636 | double magnify = 15d; |
||
637 | Rectangle2D query = new Rectangle2D.Double(xmin - magnify, ymin |
||
638 | - magnify, (xmax - xmin) + magnify, (ymax - ymin) + magnify); |
||
639 | |||
640 | strategy.process(visitor, query); |
||
641 | //al final de toda la pila de llamadas recursivas,
|
||
642 | //geometries tendr? todas las geometrias que debemos dissolver
|
||
643 | geometries.add(feature.getJtsGeometry()); |
||
644 | }// while
|
||
645 | Value[] values = visitor.getSumarizedValues2();
|
||
646 | return values;
|
||
647 | } |
||
648 | |||
649 | protected DissolvedFeature dissolve(Stack toDissol) |
||
650 | throws com.iver.cit.gvsig.fmap.DriverException, VisitException {
|
||
651 | |||
652 | DissolvedFeature feature = null;
|
||
653 | Geometry jtsGeometry = null;
|
||
654 | IndividualGeometryDissolveVisitor visitor = null;
|
||
655 | while (toDissol.size() != 0) { |
||
656 | feature = (DissolvedFeature) toDissol.pop(); |
||
657 | // flags this idx (to not to process in future)
|
||
658 | dissolvedGeometries.set(feature.getIndex()); |
||
659 | if (visitor == null) { |
||
660 | visitor = new IndividualGeometryDissolveVisitor(feature,
|
||
661 | dissolvedGeometries, toDissol, |
||
662 | numericField_sumarizeFunction); |
||
663 | visitor.setDissolveField(this.dissolveField);
|
||
664 | } else {
|
||
665 | visitor.setProcessedFeature(feature); |
||
666 | } |
||
667 | Rectangle2D bounds = feature.getGeometry().getBounds2D();
|
||
668 | double xmin = bounds.getMinX();
|
||
669 | double ymin = bounds.getMinY();
|
||
670 | double xmax = bounds.getMaxX();
|
||
671 | double ymax = bounds.getMaxY();
|
||
672 | double magnify = 15d; |
||
673 | Rectangle2D query = new Rectangle2D.Double(xmin - magnify, ymin |
||
674 | - magnify, (xmax - xmin) + magnify, (ymax - ymin) + magnify); |
||
675 | |||
676 | strategy.process(visitor, query); |
||
677 | |||
678 | Geometry jtsGeo = visitor.getFeatureJtsGeo(); |
||
679 | if (jtsGeometry == null) { |
||
680 | jtsGeometry = jtsGeo; |
||
681 | } else {
|
||
682 | jtsGeometry = jtsGeometry.union(jtsGeo); |
||
683 | } |
||
684 | }// while
|
||
685 | Value[] values = visitor.getSumarizedValues2();
|
||
686 | feature = new DissolvedFeature(null, values, -1); |
||
687 | feature.setJtsGeometry(jtsGeometry); |
||
688 | return feature;
|
||
689 | } |
||
690 | |||
691 | public void stop(FLayer layer) { |
||
692 | this.featureProcessor.finish();
|
||
693 | } |
||
694 | |||
695 | public boolean start(FLayer layer) { |
||
696 | if (layer instanceof AlphanumericData && layer instanceof VectorialData) { |
||
697 | try {
|
||
698 | dissolvedLayer = (FLyrVect) layer; |
||
699 | recordset = ((AlphanumericData) layer).getRecordset(); |
||
700 | featureProcessor.start(); |
||
701 | } catch (com.iver.cit.gvsig.fmap.DriverException e) {
|
||
702 | return false; |
||
703 | } catch (EditionException e) {
|
||
704 | return false; |
||
705 | } |
||
706 | return true; |
||
707 | } |
||
708 | return false; |
||
709 | } |
||
710 | |||
711 | public void setStrategy(Strategy strategy) { |
||
712 | this.strategy = strategy;
|
||
713 | } |
||
714 | |||
715 | public String getProcessDescription() { |
||
716 | return "Dissolving polygons of a layer"; |
||
717 | } |
||
718 | |||
719 | } |