root / trunk / extensions / extGeoProcessing / src / com / iver / cit / gvsig / geoprocess / spatialjoin / fmap / IntersectsFinderFeatureVisitor.java @ 5412
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1 | 5412 | azabala | /*
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2 | * Created on 01-mar-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 | * Revision 1.1 2006-05-24 21:09:47 azabala
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49 | * primera version en cvs despues de refactoring orientado a crear un framework extensible de geoprocessing
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50 | *
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51 | * Revision 1.2 2006/03/07 21:01:33 azabala
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52 | * *** empty log message ***
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53 | *
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54 | * Revision 1.1 2006/03/06 19:48:39 azabala
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55 | * *** empty log message ***
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56 | *
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57 | * Revision 1.1 2006/03/05 19:59:47 azabala
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58 | * *** empty log message ***
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59 | *
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60 | *
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61 | */
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62 | package com.iver.cit.gvsig.geoprocess.spatialjoin.fmap; |
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63 | |||
64 | import java.util.ArrayList; |
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65 | import java.util.Iterator; |
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66 | import java.util.List; |
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67 | import java.util.Map; |
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68 | |||
69 | import com.hardcode.gdbms.engine.data.driver.DriverException; |
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70 | import com.hardcode.gdbms.engine.values.NumericValue; |
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71 | import com.hardcode.gdbms.engine.values.Value; |
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72 | import com.iver.cit.gvsig.fmap.core.IGeometry; |
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73 | import com.iver.cit.gvsig.fmap.layers.FBitSet; |
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74 | import com.iver.cit.gvsig.fmap.layers.FLayer; |
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75 | import com.iver.cit.gvsig.fmap.layers.SelectableDataSource; |
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76 | import com.iver.cit.gvsig.fmap.layers.layerOperations.AlphanumericData; |
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77 | import com.iver.cit.gvsig.fmap.layers.layerOperations.VectorialData; |
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78 | import com.iver.cit.gvsig.fmap.operations.strategies.FeatureVisitor; |
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79 | import com.iver.cit.gvsig.fmap.operations.strategies.VisitException; |
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80 | import com.iver.cit.gvsig.geoprocess.core.fmap.SummarizationFunction; |
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81 | import com.vividsolutions.jts.geom.Geometry; |
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82 | /**
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83 | * Given a feature of JOIN source layer,
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84 | * it looks for intersecting geometries of JOIN target layer and applies
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85 | * a sumarization function to its numeric fields.
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86 | *
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87 | * @author azabala
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88 | *
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89 | */
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90 | public class IntersectsFinderFeatureVisitor implements FeatureVisitor { |
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91 | /**
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92 | * Reads atributes of target layer
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93 | */
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94 | SelectableDataSource targetRecordset; |
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95 | /**
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96 | * Geometry of layer A whose intersections of layer B
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97 | * we are looking for
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98 | */
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99 | private Geometry queryGeometry;
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100 | /**
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101 | * It has indexes of intersections
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102 | */
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103 | private List intersectIndexes = null; |
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104 | /**
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105 | * Relates a set of sumarization functions with a numeric field
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106 | * name
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107 | */
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108 | Map fields_sumarizationFun = null; |
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109 | |||
110 | private FBitSet selection;
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111 | |||
112 | public IntersectsFinderFeatureVisitor(Geometry geometry, Map functions) { |
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113 | this.queryGeometry = geometry;
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114 | this.fields_sumarizationFun = functions;
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115 | intersectIndexes = new ArrayList(); |
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116 | } |
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117 | |||
118 | public IntersectsFinderFeatureVisitor(Map functions) { |
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119 | this.fields_sumarizationFun = functions;
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120 | intersectIndexes = new ArrayList(); |
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121 | } |
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122 | |||
123 | public void visit(IGeometry g, int index) throws VisitException { |
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124 | if(selection != null){ |
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125 | if(! selection.get(index)){
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126 | //dont process feature because is not selected
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127 | return;
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128 | } |
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129 | } |
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130 | Geometry jtsGeo = g.toJTSGeometry(); |
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131 | if (queryGeometry.intersects(jtsGeo)) {
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132 | intersectIndexes.add(new Integer(index)); |
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133 | try {
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134 | applySumarizeFunction(index); |
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135 | } catch (DriverException e) {
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136 | throw new VisitException("Error al acceder a los atributos de la capa destino en un spatial join"); |
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137 | } |
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138 | } |
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139 | } |
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140 | |||
141 | public String getProcessDescription() { |
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142 | return "Looking intersects and sumarizing for a spatial join"; |
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143 | } |
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144 | |||
145 | private void applySumarizeFunction(int recordIndex) throws DriverException { |
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146 | Iterator fieldsIt = fields_sumarizationFun.keySet().iterator();
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147 | while (fieldsIt.hasNext()) {
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148 | String field = (String) fieldsIt.next(); |
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149 | int fieldIndex = targetRecordset.getFieldIndexByName(field);
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150 | Value valToSumarize = targetRecordset.getFieldValue(recordIndex, |
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151 | fieldIndex); |
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152 | SummarizationFunction[] functions =
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153 | (SummarizationFunction[]) fields_sumarizationFun.get(field);
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154 | for (int i = 0; i < functions.length; i++) { |
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155 | functions[i].process((NumericValue) valToSumarize); |
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156 | }// for
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157 | }// while
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158 | } |
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159 | |||
160 | public List getIntersectIndexes() { |
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161 | return intersectIndexes;
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162 | } |
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163 | |||
164 | public int getNumIntersections() { |
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165 | return intersectIndexes.size();
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166 | } |
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167 | |||
168 | public boolean hasFoundIntersections() { |
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169 | return intersectIndexes.size() > 0; |
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170 | } |
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171 | |||
172 | public void stop(FLayer layer) { |
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173 | } |
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174 | |||
175 | public boolean start(FLayer layer) { |
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176 | if (layer instanceof AlphanumericData && layer instanceof VectorialData) { |
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177 | try {
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178 | targetRecordset = ((AlphanumericData) layer).getRecordset(); |
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179 | } catch (com.iver.cit.gvsig.fmap.DriverException e) {
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180 | return false; |
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181 | } |
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182 | return true; |
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183 | } |
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184 | return false; |
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185 | } |
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186 | |||
187 | public void setQueryGeometry(Geometry queryGeometry) { |
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188 | this.queryGeometry = queryGeometry;
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189 | } |
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190 | |||
191 | public void setSelection(FBitSet selection) { |
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192 | this.selection = selection;
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193 | } |
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194 | |||
195 | } |