Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/utils/GeometryUtils.java @ 2054:a653295c9ac0
Make use of user defined axes font sizes.
flys-artifacts/trunk@3544 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
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date | Tue, 27 Dec 2011 08:50:28 +0000 |
parents | 092e1e5020bc |
children | cbeeaaad1056 |
rev | line source |
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The boundary (extent) for the river axis is determined based on its geometry - this extent is written into the wms facet.
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parents:
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1 package de.intevation.flys.utils; |
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The boundary (extent) for the river axis is determined based on its geometry - this extent is written into the wms facet.
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parents:
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2 |
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3 import java.io.IOException; |
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4 import java.io.File; |
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5 import java.io.Serializable; |
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6 import java.net.MalformedURLException; |
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7 import java.util.ArrayList; |
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8 import java.util.HashMap; |
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9 import java.util.List; |
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10 import java.util.Map; |
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11 |
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12 import org.apache.log4j.Logger; |
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13 |
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14 import com.vividsolutions.jts.geom.Coordinate; |
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15 import com.vividsolutions.jts.geom.Envelope; |
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16 import com.vividsolutions.jts.geom.Geometry; |
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17 |
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18 import org.opengis.feature.simple.SimpleFeature; |
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19 import org.opengis.feature.simple.SimpleFeatureType; |
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20 import org.opengis.referencing.FactoryException; |
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21 import org.opengis.referencing.NoSuchAuthorityCodeException; |
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22 import org.opengis.referencing.crs.CoordinateReferenceSystem; |
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23 |
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24 import org.geotools.data.DataStoreFactorySpi; |
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25 import org.geotools.data.FeatureStore; |
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26 import org.geotools.data.DefaultTransaction; |
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27 import org.geotools.data.Transaction; |
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28 import org.geotools.data.shapefile.ShapefileDataStore; |
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29 import org.geotools.data.shapefile.ShapefileDataStoreFactory; |
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30 import org.geotools.feature.FeatureIterator; |
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31 import org.geotools.feature.FeatureCollection; |
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32 import org.geotools.feature.simple.SimpleFeatureTypeBuilder; |
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33 import org.geotools.geojson.feature.FeatureJSON; |
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34 import org.geotools.referencing.CRS; |
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35 |
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36 import de.intevation.flys.model.RiverAxis; |
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37 |
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38 |
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39 public class GeometryUtils { |
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40 |
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41 private static final Logger logger = Logger.getLogger(GeometryUtils.class); |
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42 |
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43 |
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44 private GeometryUtils() { |
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45 } |
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46 |
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47 |
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48 public static Envelope getRiverBoundary(String rivername) { |
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49 RiverAxis axis = RiverAxis.getRiverAxis(rivername); |
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50 if (axis != null) { |
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51 // TODO Take the correct EPSG into account. Maybe, we need to |
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52 // reproject the geometry. |
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53 return axis.getGeom().getEnvelopeInternal(); |
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54 } |
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55 |
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56 return null; |
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57 } |
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58 |
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59 |
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60 public static String getRiverBounds(String rivername) { |
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61 Envelope env = getRiverBoundary(rivername); |
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62 |
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63 if (env == null) { |
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64 return jtsBoundsToOLBounds(env); |
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65 } |
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66 |
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67 return null; |
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68 } |
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69 |
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70 |
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71 /** |
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72 * Returns the boundary of Envelope <i>env</i> in OpenLayers |
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73 * representation. |
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74 * |
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75 * @param env The envelope of a geometry. |
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76 * |
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77 * @return the OpenLayers boundary of <i>env</i>. |
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78 */ |
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79 public static String jtsBoundsToOLBounds(Envelope env) { |
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80 return "" + |
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81 env.getMinX() + " " + |
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82 env.getMinY() + " " + |
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83 env.getMaxX() + " " + |
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84 env.getMaxY(); |
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85 } |
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86 |
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87 |
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88 public static String createOLBounds(Geometry a, Geometry b) { |
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89 Coordinate[] ca = a.getCoordinates(); |
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90 Coordinate[] cb = b.getCoordinates(); |
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91 |
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92 double lowerX = Double.MAX_VALUE; |
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93 double lowerY = Double.MAX_VALUE; |
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94 double upperX = -Double.MAX_VALUE; |
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95 double upperY = -Double.MAX_VALUE; |
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96 |
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97 for (Coordinate c: ca) { |
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98 lowerX = lowerX < c.x ? lowerX : c.x; |
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99 lowerY = lowerY < c.y ? lowerY : c.y; |
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100 |
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101 upperX = upperX > c.x ? upperX : c.x; |
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102 upperY = upperY > c.y ? upperY : c.y; |
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103 } |
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104 |
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105 for (Coordinate c: cb) { |
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106 lowerX = lowerX < c.x ? lowerX : c.x; |
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107 lowerY = lowerY < c.y ? lowerY : c.y; |
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108 |
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109 upperX = upperX > c.x ? upperX : c.x; |
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110 upperY = upperY > c.y ? upperY : c.y; |
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111 } |
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112 |
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113 return "" + lowerX + " " + lowerY + " " + upperX + " " + upperY; |
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114 } |
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115 |
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116 |
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117 public static SimpleFeatureType buildFeatureType( |
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118 String name, String srs, Class geometryType) |
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119 { |
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120 return buildFeatureType(name, srs, geometryType, null); |
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121 } |
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122 |
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123 |
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124 /** |
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125 * Creates a new SimpleFeatureType using a SimpleFeatureTypeBuilder. |
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126 * |
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127 * @param name The name of the FeatureType. |
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128 * @param srs The SRS (e.g. "EPSG:31466"). |
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129 * @param geometryType The geometry type's class (e.g. Polygon.class). |
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130 * @param attrs Optional. An object with attribute-name/attribute-class |
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131 * pairs where index 0 specifies the name as string and index 1 the type |
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132 * as class. |
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133 * |
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134 * @return a new SimpleFeatureType. |
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135 */ |
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136 public static SimpleFeatureType buildFeatureType( |
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137 String name, String srs, Class geometryType, Object[][] attrs) |
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138 { |
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139 try { |
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140 SimpleFeatureTypeBuilder builder = new SimpleFeatureTypeBuilder(); |
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141 CoordinateReferenceSystem crs = CRS.decode(srs); |
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142 |
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143 builder.setName("flys"); |
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144 builder.setNamespaceURI("http://www.intevation.de/"); |
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145 builder.setCRS(crs); |
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146 builder.setSRS(srs); |
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147 |
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148 builder.add("geometry", geometryType, crs); |
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149 |
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150 if (attrs != null) { |
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151 for (Object[] attr: attrs) { |
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152 builder.add((String) attr[0], (Class) attr[1]); |
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153 } |
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154 } |
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155 |
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156 return builder.buildFeatureType(); |
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157 } |
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158 catch (NoSuchAuthorityCodeException nsae) { |
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159 } |
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160 catch (FactoryException fe) { |
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161 } |
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162 |
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163 return null; |
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164 } |
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165 |
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166 |
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167 public static List<SimpleFeature> parseGeoJSON( |
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168 String geojson, SimpleFeatureType ft |
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169 ) { |
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170 List<SimpleFeature> collection = new ArrayList<SimpleFeature>(); |
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171 |
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172 try { |
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173 FeatureJSON fjson = new FeatureJSON(); |
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174 fjson.setFeatureType(ft); |
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175 |
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176 FeatureIterator<SimpleFeature> iterator = |
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177 fjson.streamFeatureCollection(geojson); |
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178 |
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179 while (iterator.hasNext()) { |
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180 collection.add(iterator.next()); |
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181 } |
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182 } |
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183 catch (IOException ioe) { |
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184 // TODO handle exception |
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185 } |
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186 |
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187 return collection; |
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188 } |
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189 |
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190 |
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191 public static boolean writeShapefile( |
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192 File shape, |
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193 SimpleFeatureType featureType, |
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194 FeatureCollection collection |
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195 ) { |
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196 if (collection.isEmpty()) { |
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197 logger.warn("Shapefile is not written - no features given!"); |
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198 return false; |
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199 } |
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200 |
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201 Transaction transaction = null; |
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202 |
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203 try { |
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204 Map<String, Serializable> params = |
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205 new HashMap<String, Serializable>(); |
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206 |
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207 params.put("url", shape.toURI().toURL()); |
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208 params.put("create spatial index", Boolean.TRUE); |
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209 |
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210 DataStoreFactorySpi dataStoreFactory = |
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211 new ShapefileDataStoreFactory(); |
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212 |
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213 ShapefileDataStore newDataStore = |
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214 (ShapefileDataStore)dataStoreFactory.createNewDataStore(params); |
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215 newDataStore.createSchema(featureType); |
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216 |
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217 transaction = new DefaultTransaction("create"); |
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218 |
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219 String typeName = newDataStore.getTypeNames()[0]; |
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220 |
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221 FeatureStore<SimpleFeatureType, SimpleFeature> featureStore = |
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222 (FeatureStore<SimpleFeatureType, SimpleFeature>) |
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223 newDataStore.getFeatureSource(typeName); |
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224 |
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225 featureStore.setTransaction(transaction); |
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226 |
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227 featureStore.addFeatures(collection); |
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228 transaction.commit(); |
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229 |
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230 return true; |
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231 } |
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232 catch (MalformedURLException mue) { |
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233 logger.error("Unable to prepare shapefile: " + mue.getMessage()); |
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234 } |
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235 catch (IOException ioe) { |
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236 logger.error("Unable to write shapefile: " + ioe.getMessage()); |
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237 } |
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238 finally { |
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239 if (transaction != null) { |
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240 try { |
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241 logger.debug("XXX CLOSE TRANSACTION!"); |
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242 transaction.close(); |
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243 } |
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244 catch (IOException ioe) { /* do nothing */ } |
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245 } |
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246 } |
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247 |
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248 return false; |
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249 } |
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250 } |
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251 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |