Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/utils/GeometryUtils.java @ 5319:0324a5dfdfef
Added tag 2.9.13 for changeset 7fa94b793cbe
author | Andre Heinecke <aheinecke@intevation.de> |
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date | Fri, 15 Mar 2013 10:15:33 +0100 |
parents | 9d36ddf7dbd3 |
children | fd07bcaff880 |
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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2 |
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3 import com.vividsolutions.jts.geom.Coordinate; |
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4 import com.vividsolutions.jts.geom.Envelope; |
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5 import com.vividsolutions.jts.geom.Geometry; |
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6 |
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7 import de.intevation.flys.model.RiverAxis; |
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8 |
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9 import java.io.File; |
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10 import java.io.IOException; |
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11 import java.io.Serializable; |
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12 import java.net.MalformedURLException; |
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13 import java.util.ArrayList; |
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14 import java.util.HashMap; |
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15 import java.util.List; |
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16 import java.util.Map; |
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17 |
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18 import org.apache.log4j.Logger; |
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19 import org.geotools.data.DataStoreFactorySpi; |
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20 import org.geotools.data.DefaultTransaction; |
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21 import org.geotools.data.FeatureWriter; |
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22 import org.geotools.data.Transaction; |
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23 import org.geotools.data.shapefile.ShapefileDataStore; |
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24 import org.geotools.data.shapefile.ShapefileDataStoreFactory; |
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25 import org.geotools.data.simple.SimpleFeatureIterator; |
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26 import org.geotools.feature.FeatureCollection; |
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27 import org.geotools.feature.FeatureIterator; |
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28 import org.geotools.feature.simple.SimpleFeatureTypeBuilder; |
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29 import org.geotools.geojson.feature.FeatureJSON; |
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30 import org.geotools.geometry.jts.JTS; |
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31 import org.geotools.geometry.jts.ReferencedEnvelope; |
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32 import org.geotools.referencing.CRS; |
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33 import org.hibernate.HibernateException; |
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34 import org.opengis.feature.simple.SimpleFeature; |
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35 import org.opengis.feature.simple.SimpleFeatureType; |
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36 import org.opengis.referencing.FactoryException; |
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37 import org.opengis.referencing.NoSuchAuthorityCodeException; |
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38 import org.opengis.referencing.crs.CoordinateReferenceSystem; |
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39 import org.opengis.referencing.operation.MathTransform; |
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40 import org.opengis.referencing.operation.TransformException; |
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41 |
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42 public class GeometryUtils { |
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43 |
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44 private static final Logger logger = Logger.getLogger(GeometryUtils.class); |
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45 |
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46 public static final String PREFIX_EPSG = "EPSG:"; |
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47 |
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48 public static final String DEFAULT_EPSG = "EPSG:31467"; |
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49 |
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50 private GeometryUtils() { |
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51 } |
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52 |
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53 public static Envelope getRiverBoundary(String rivername) { |
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54 try { |
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55 List<RiverAxis> axes = RiverAxis.getRiverAxis(rivername); |
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56 if (axes != null && axes.size() > 0) { |
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57 Envelope max = null; |
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58 |
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59 for (RiverAxis axis: axes) { |
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60 // TODO Take the correct EPSG into account. Maybe, we need to |
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61 // reproject the geometry. |
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62 Envelope env = axis.getGeom().getEnvelopeInternal(); |
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63 |
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64 if (max == null) { |
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65 max = env; |
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66 } |
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67 else { |
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68 max.expandToInclude(env); |
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69 } |
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70 } |
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71 |
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72 return max; |
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73 } |
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74 } |
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75 catch(HibernateException iae) { |
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76 logger.warn("No vaild river axis forund for " + rivername); |
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77 return null; |
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78 } |
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79 |
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80 return null; |
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81 } |
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82 |
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83 public static String getRiverBounds(String rivername) { |
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84 Envelope env = getRiverBoundary(rivername); |
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85 |
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86 if (env != null) { |
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87 return jtsBoundsToOLBounds(env); |
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88 } |
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89 |
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90 return null; |
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91 } |
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92 |
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93 /** |
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94 * Returns the boundary of Envelope <i>env</i> in OpenLayers representation. |
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95 * |
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96 * @param env The envelope of a geometry. |
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97 * |
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98 * @return the OpenLayers boundary of <i>env</i>. |
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99 */ |
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100 public static String jtsBoundsToOLBounds(Envelope env) { |
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101 StringBuilder buf = new StringBuilder(); |
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102 buf.append(env.getMinX()); buf.append(' '); |
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103 buf.append(env.getMinY()); buf.append(' '); |
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104 buf.append(env.getMaxX()); buf.append(' '); |
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105 buf.append(env.getMaxY()); |
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106 return buf.toString(); |
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107 } |
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108 |
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109 public static String createOLBounds(Geometry a, Geometry b) { |
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110 Coordinate[] ca = a.getCoordinates(); |
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111 Coordinate[] cb = b.getCoordinates(); |
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112 |
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113 double lowerX = Double.MAX_VALUE; |
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114 double lowerY = Double.MAX_VALUE; |
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115 double upperX = -Double.MAX_VALUE; |
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116 double upperY = -Double.MAX_VALUE; |
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117 |
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118 for (Coordinate c: ca) { |
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119 lowerX = lowerX < c.x ? lowerX : c.x; |
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120 lowerY = lowerY < c.y ? lowerY : c.y; |
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121 |
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122 upperX = upperX > c.x ? upperX : c.x; |
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123 upperY = upperY > c.y ? upperY : c.y; |
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124 } |
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125 |
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126 for (Coordinate c: cb) { |
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127 lowerX = lowerX < c.x ? lowerX : c.x; |
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128 lowerY = lowerY < c.y ? lowerY : c.y; |
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129 |
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130 upperX = upperX > c.x ? upperX : c.x; |
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131 upperY = upperY > c.y ? upperY : c.y; |
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132 } |
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133 |
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134 return "" + lowerX + " " + lowerY + " " + upperX + " " + upperY; |
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135 } |
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136 |
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137 public static SimpleFeatureType buildFeatureType( |
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138 String name, String srs, Class<?> geometryType) |
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139 { |
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140 return buildFeatureType(name, srs, geometryType, null); |
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141 } |
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142 |
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143 /** |
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144 * Creates a new SimpleFeatureType using a SimpleFeatureTypeBuilder. |
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145 * |
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146 * @param name The name of the FeatureType. |
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147 * @param srs The SRS (e.g. "EPSG:31466"). |
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148 * @param geometryType The geometry type's class (e.g. Polygon.class). |
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149 * @param attrs Optional. An object with attribute-name/attribute-class pairs |
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150 * where index 0 specifies the name as string and index 1 the |
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151 * ype as class. |
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152 * |
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153 * @return a new SimpleFeatureType. |
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154 */ |
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155 public static SimpleFeatureType buildFeatureType(String name, String srs, |
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156 Class<?> geometryType, Object[][] attrs) { |
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157 try { |
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158 SimpleFeatureTypeBuilder builder = new SimpleFeatureTypeBuilder(); |
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159 CoordinateReferenceSystem crs = CRS.decode(srs); |
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160 |
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161 builder.setName("flys"); |
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162 builder.setNamespaceURI("http://www.intevation.de/"); |
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163 builder.setCRS(crs); |
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164 builder.setSRS(srs); |
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165 |
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166 builder.add("geometry", geometryType, crs); |
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167 |
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168 if (attrs != null) { |
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169 for (Object[] attr: attrs) { |
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170 builder.add((String) attr[0], (Class<?>) attr[1]); |
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171 } |
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172 } |
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173 |
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174 return builder.buildFeatureType(); |
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175 } |
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176 catch (NoSuchAuthorityCodeException nsae) { |
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177 } |
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178 catch (FactoryException fe) { |
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179 } |
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180 |
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181 return null; |
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182 } |
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183 |
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184 public static List<SimpleFeature> parseGeoJSON( |
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185 String geojson, SimpleFeatureType ft |
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186 ) { |
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187 List<SimpleFeature> collection = new ArrayList<SimpleFeature>(); |
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188 |
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189 try { |
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190 FeatureJSON fjson = new FeatureJSON(); |
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191 fjson.setFeatureType(ft); |
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192 |
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193 FeatureIterator<SimpleFeature> iterator = |
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194 fjson.streamFeatureCollection(geojson); |
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195 |
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196 while (iterator.hasNext()) { |
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197 collection.add(iterator.next()); |
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198 } |
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199 } |
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200 catch (IOException ioe) { |
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201 // TODO handle exception |
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202 } |
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203 |
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204 return collection; |
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205 } |
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206 |
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207 |
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208 /** |
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209 * This method returns the {@link CoordinateReferenceSystem} by the |
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210 * {@link String} <i>epsg</i>. |
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211 * |
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212 * @param epsg An EPSG code like <b>EPSG:31466</b> |
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213 * |
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214 * @return the {@link CoordinateReferenceSystem} specified by <i>epsg</i>. |
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215 */ |
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216 public static CoordinateReferenceSystem getCoordinateReferenceSystem( |
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217 String epsg |
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218 ) { |
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219 if (epsg == null) { |
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220 logger.warn("cannot create CoordinateReferenceSystem with null"); |
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221 return null; |
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222 } |
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223 |
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224 if (!epsg.startsWith(PREFIX_EPSG)) { |
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225 epsg = PREFIX_EPSG + epsg; |
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226 } |
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227 |
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228 try { |
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229 return CRS.decode(epsg); |
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230 } |
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231 catch (FactoryException fe) { |
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232 logger.error( |
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233 "unable to get CoordinateReferenceSystem for: " + epsg, |
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234 fe); |
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235 } |
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236 |
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237 return null; |
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238 } |
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239 |
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240 |
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241 public static Envelope transform(Envelope orig, String targetSrs) { |
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242 return transform(orig, targetSrs, DEFAULT_EPSG); |
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243 } |
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244 |
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245 |
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246 public static Envelope transform( |
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247 Envelope orig, |
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248 String targetSrs, |
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249 String origSrs |
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250 ) { |
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251 if (targetSrs == null || orig == null || origSrs == null) { |
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252 logger.warn("unable to transform envelope: empty parameters"); |
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253 return orig; |
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254 } |
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255 |
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256 logger.debug("Transform envlope to '" + targetSrs + "'"); |
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257 try { |
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258 CoordinateReferenceSystem sourceCRS = |
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259 getCoordinateReferenceSystem(origSrs); |
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260 |
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261 CoordinateReferenceSystem targetCRS = |
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262 getCoordinateReferenceSystem(targetSrs); |
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263 |
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264 if (sourceCRS != null && targetCRS != null) { |
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265 ReferencedEnvelope tmpEnv = |
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266 new ReferencedEnvelope(orig, CRS.decode(origSrs)); |
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267 |
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268 Envelope target = tmpEnv.transform(targetCRS, false); |
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269 |
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270 if (logger.isDebugEnabled()) { |
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271 logger.debug(" orig envelope : " + orig); |
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272 logger.debug(" transformed envelope: " + target); |
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273 } |
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274 |
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275 return target; |
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276 } |
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277 } |
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278 catch (NoSuchAuthorityCodeException nsae) { |
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279 logger.error("Cannot get CoordinateReferenceSystem!", nsae); |
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280 } |
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281 catch (FactoryException fe) { |
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282 logger.error("Cannot get CoordinateReferenceSystem!", fe); |
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283 } |
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284 catch (TransformException te) { |
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285 logger.error("Cannot transform envelope from source " |
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286 + origSrs + " to target srs " + targetSrs); |
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287 } |
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288 |
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289 return null; |
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290 } |
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291 |
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292 |
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293 public static boolean writeShapefile(File shape, |
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294 SimpleFeatureType featureType, FeatureCollection<?, ?> collection) { |
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295 return writeShapefile(shape, featureType, collection, |
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296 featureType.getCoordinateReferenceSystem()); |
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297 } |
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298 |
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299 |
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300 public static boolean writeShapefile(File shape, |
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301 SimpleFeatureType featureType, FeatureCollection<?, ?> collection, |
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302 CoordinateReferenceSystem crs) { |
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303 if (collection.isEmpty()) { |
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304 logger.warn("Shapefile is not written - no features given!"); |
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305 return false; |
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306 } |
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307 |
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308 Transaction transaction = null; |
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309 |
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310 try { |
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311 MathTransform transform = CRS.findMathTransform( |
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312 CRS.decode(DEFAULT_EPSG), crs); |
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313 |
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314 Map<String, Serializable> params = |
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315 new HashMap<String, Serializable>(); |
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316 |
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317 params.put("url", shape.toURI().toURL()); |
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318 params.put("create spatial index", Boolean.TRUE); |
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319 |
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320 DataStoreFactorySpi dataStoreFactory = |
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321 new ShapefileDataStoreFactory(); |
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322 |
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323 ShapefileDataStore newDataStore = |
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324 (ShapefileDataStore)dataStoreFactory.createNewDataStore(params); |
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325 newDataStore.createSchema(featureType); |
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326 |
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327 transaction = new DefaultTransaction("create"); |
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328 |
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329 String typeName = newDataStore.getTypeNames()[0]; |
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330 |
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331 FeatureWriter<SimpleFeatureType, SimpleFeature> writer = |
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332 newDataStore.getFeatureWriter(typeName, transaction); |
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333 |
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334 SimpleFeatureIterator iterator = (SimpleFeatureIterator) collection.features(); |
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335 |
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336 while (iterator.hasNext()){ |
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337 SimpleFeature feature = iterator.next(); |
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338 SimpleFeature copy = writer.next(); |
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339 |
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340 copy.setAttributes(feature.getAttributes()); |
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341 |
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342 Geometry orig = (Geometry) feature.getDefaultGeometry(); |
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343 Geometry reprojected = JTS.transform(orig, transform); |
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344 |
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345 copy.setDefaultGeometry(reprojected); |
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346 writer.write(); |
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347 } |
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348 |
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349 transaction.commit(); |
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350 |
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351 return true; |
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352 } |
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353 catch (MalformedURLException mue) { |
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354 logger.error("Unable to prepare shapefile: " + mue.getMessage()); |
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355 } |
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356 catch (IOException ioe) { |
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357 logger.error("Unable to write shapefile: " + ioe.getMessage()); |
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358 } |
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359 catch (NoSuchAuthorityCodeException nsae) { |
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360 logger.error("Cannot get CoordinateReferenceSystem for '" |
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361 + DEFAULT_EPSG + "'"); |
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362 } |
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363 catch (FactoryException fe) { |
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364 logger.error("Cannot get CoordinateReferenceSystem for '" |
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365 + DEFAULT_EPSG + "'"); |
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366 } |
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367 catch (TransformException te) { |
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368 logger.error("Was not able to transform geometry!", te); |
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369 } |
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370 finally { |
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371 if (transaction != null) { |
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372 try { |
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373 transaction.close(); |
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374 } |
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375 catch (IOException ioe) { /* do nothing */ } |
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376 } |
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377 } |
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378 |
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379 return false; |
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380 } |
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381 } |
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382 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |