Mercurial > dive4elements > river
annotate artifacts/src/main/java/org/dive4elements/river/utils/GeometryUtils.java @ 8755:30b1ddadf275
(issue1801) Unify reference gauge finding code
The basic way as described in the method comment of the
determineRefGauge method is now used in the WINFOArtifact,
MainValuesService and RiverUtils.getGauge method.
RiverUtils.getGauge previously just returned the first
gauge found. While this is now a behavior change I believe
that it is always more correct then the undeterministic
behavior of the previous implmenentation.
author | Andre Heinecke <andre.heinecke@intevation.de> |
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date | Wed, 24 Jun 2015 14:07:26 +0200 |
parents | e9d912c97fa8 |
children | 5e38e2924c07 |
rev | line source |
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde |
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2 * Software engineering by Intevation GmbH |
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3 * |
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4 * This file is Free Software under the GNU AGPL (>=v3) |
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the |
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6 * documentation coming with Dive4Elements River for details. |
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7 */ |
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8 |
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9 package org.dive4elements.river.utils; |
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10 |
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11 import com.vividsolutions.jts.geom.Coordinate; |
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12 import com.vividsolutions.jts.geom.Envelope; |
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13 import com.vividsolutions.jts.geom.Geometry; |
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14 |
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15 import org.dive4elements.river.model.RiverAxis; |
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16 |
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17 import java.io.File; |
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18 import java.io.IOException; |
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19 import java.io.Serializable; |
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20 import java.net.MalformedURLException; |
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21 import java.util.ArrayList; |
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22 import java.util.HashMap; |
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23 import java.util.List; |
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24 import java.util.Map; |
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25 |
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26 import org.apache.log4j.Logger; |
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27 import org.geotools.data.DataStoreFactorySpi; |
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28 import org.geotools.data.DefaultTransaction; |
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29 import org.geotools.data.FeatureWriter; |
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30 import org.geotools.data.Transaction; |
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31 import org.geotools.data.shapefile.ShapefileDataStore; |
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32 import org.geotools.data.shapefile.ShapefileDataStoreFactory; |
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33 import org.geotools.data.simple.SimpleFeatureIterator; |
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34 import org.geotools.feature.FeatureCollection; |
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35 import org.geotools.feature.FeatureIterator; |
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36 import org.geotools.feature.simple.SimpleFeatureTypeBuilder; |
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37 import org.geotools.geojson.feature.FeatureJSON; |
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38 import org.geotools.geometry.jts.JTS; |
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39 import org.geotools.geometry.jts.ReferencedEnvelope; |
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40 import org.geotools.referencing.CRS; |
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41 import org.hibernate.HibernateException; |
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42 import org.opengis.feature.simple.SimpleFeature; |
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43 import org.opengis.feature.simple.SimpleFeatureType; |
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44 import org.opengis.referencing.FactoryException; |
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45 import org.opengis.referencing.NoSuchAuthorityCodeException; |
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46 import org.opengis.referencing.crs.CoordinateReferenceSystem; |
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47 import org.opengis.referencing.operation.MathTransform; |
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48 import org.opengis.referencing.operation.TransformException; |
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49 |
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50 public class GeometryUtils { |
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51 |
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52 private static final Logger log = Logger.getLogger(GeometryUtils.class); |
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53 |
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54 public static final String PREFIX_EPSG = "EPSG:"; |
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55 |
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56 public static final String DEFAULT_EPSG = "EPSG:31467"; |
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57 |
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58 private GeometryUtils() { |
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59 } |
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60 |
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61 public static Envelope getRiverBoundary(String rivername) { |
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62 try { |
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63 RiverAxis axis = RiverAxis.getRiverAxis(rivername); |
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64 if (axis != null) { |
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65 return axis.getGeom().getEnvelopeInternal(); |
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66 } |
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67 } |
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68 catch(HibernateException iae) { |
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69 log.warn("Exception, no valid river axis found for " + rivername); |
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70 return null; |
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71 } |
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72 log.warn("No valid river axis found for " + rivername); |
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73 |
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74 return null; |
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75 } |
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76 |
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77 public static String getRiverBounds(String rivername) { |
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78 Envelope env = getRiverBoundary(rivername); |
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79 |
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80 if (env != null) { |
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81 return jtsBoundsToOLBounds(env); |
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82 } |
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83 |
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84 return null; |
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85 } |
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86 |
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87 /** |
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88 * Returns the boundary of Envelope <i>env</i> in OpenLayers representation. |
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89 * |
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90 * @param env The envelope of a geometry. |
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91 * |
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92 * @return the OpenLayers boundary of <i>env</i>. |
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93 */ |
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94 public static String jtsBoundsToOLBounds(Envelope env) { |
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95 StringBuilder buf = new StringBuilder(); |
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96 buf.append(env.getMinX()); buf.append(' '); |
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97 buf.append(env.getMinY()); buf.append(' '); |
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98 buf.append(env.getMaxX()); buf.append(' '); |
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99 buf.append(env.getMaxY()); |
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100 return buf.toString(); |
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101 } |
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102 |
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103 public static String createOLBounds(Geometry a, Geometry b) { |
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104 Coordinate[] ca = a.getCoordinates(); |
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105 Coordinate[] cb = b.getCoordinates(); |
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106 |
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107 double lowerX = Double.MAX_VALUE; |
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108 double lowerY = Double.MAX_VALUE; |
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109 double upperX = -Double.MAX_VALUE; |
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110 double upperY = -Double.MAX_VALUE; |
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111 |
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112 for (Coordinate c: ca) { |
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113 lowerX = lowerX < c.x ? lowerX : c.x; |
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114 lowerY = lowerY < c.y ? lowerY : c.y; |
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115 |
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116 upperX = upperX > c.x ? upperX : c.x; |
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117 upperY = upperY > c.y ? upperY : c.y; |
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118 } |
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119 |
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120 for (Coordinate c: cb) { |
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121 lowerX = lowerX < c.x ? lowerX : c.x; |
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122 lowerY = lowerY < c.y ? lowerY : c.y; |
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123 |
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124 upperX = upperX > c.x ? upperX : c.x; |
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125 upperY = upperY > c.y ? upperY : c.y; |
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126 } |
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127 |
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128 return "" + lowerX + " " + lowerY + " " + upperX + " " + upperY; |
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129 } |
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130 |
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131 public static SimpleFeatureType buildFeatureType( |
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132 String name, String srs, Class<?> geometryType) |
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133 { |
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134 return buildFeatureType(name, srs, geometryType, null); |
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135 } |
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136 |
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137 /** |
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138 * Creates a new SimpleFeatureType using a SimpleFeatureTypeBuilder. |
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139 * |
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140 * @param name The name of the FeatureType. |
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141 * @param srs The SRS (e.g. "EPSG:31466"). |
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142 * @param geometryType The geometry type's class (e.g. Polygon.class). |
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143 * @param attrs Optional. An object with attribute-name/attribute-class pairs |
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144 * where index 0 specifies the name as string and index 1 the |
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145 * ype as class. |
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146 * |
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147 * @return a new SimpleFeatureType. |
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148 */ |
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149 public static SimpleFeatureType buildFeatureType(String name, String srs, |
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150 Class<?> geometryType, Object[][] attrs) { |
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151 try { |
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152 SimpleFeatureTypeBuilder builder = new SimpleFeatureTypeBuilder(); |
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153 CoordinateReferenceSystem crs = CRS.decode(srs); |
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154 |
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155 builder.setName("flys"); |
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156 builder.setNamespaceURI("http://www.intevation.de/"); |
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157 builder.setCRS(crs); |
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158 builder.setSRS(srs); |
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159 |
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160 builder.add("geometry", geometryType, crs); |
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161 |
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162 if (attrs != null) { |
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163 for (Object[] attr: attrs) { |
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164 builder.add((String) attr[0], (Class<?>) attr[1]); |
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165 } |
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166 } |
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167 |
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168 return builder.buildFeatureType(); |
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169 } |
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170 catch (NoSuchAuthorityCodeException nsae) { |
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171 } |
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172 catch (FactoryException fe) { |
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173 } |
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174 |
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175 return null; |
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176 } |
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177 |
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178 public static List<SimpleFeature> parseGeoJSON( |
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179 String geojson, SimpleFeatureType ft |
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180 ) { |
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181 List<SimpleFeature> collection = new ArrayList<SimpleFeature>(); |
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182 |
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183 try { |
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184 FeatureJSON fjson = new FeatureJSON(); |
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185 fjson.setFeatureType(ft); |
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186 |
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187 FeatureIterator<SimpleFeature> iterator = |
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188 fjson.streamFeatureCollection(geojson); |
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189 |
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190 while (iterator.hasNext()) { |
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191 collection.add(iterator.next()); |
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192 } |
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193 } |
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194 catch (IOException ioe) { |
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195 // TODO handle exception |
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196 } |
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197 |
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198 return collection; |
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199 } |
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200 |
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201 |
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202 /** |
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203 * This method returns the {@link CoordinateReferenceSystem} by the |
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204 * {@link String} <i>epsg</i>. |
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205 * |
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206 * @param epsg An EPSG code like <b>EPSG:31466</b> |
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207 * |
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208 * @return the {@link CoordinateReferenceSystem} specified by <i>epsg</i>. |
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209 */ |
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210 public static CoordinateReferenceSystem getCoordinateReferenceSystem( |
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211 String epsg |
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212 ) { |
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213 if (epsg == null) { |
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214 log.warn("cannot create CoordinateReferenceSystem with null"); |
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215 return null; |
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216 } |
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217 |
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218 if (!epsg.startsWith(PREFIX_EPSG)) { |
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219 epsg = PREFIX_EPSG + epsg; |
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220 } |
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221 |
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222 try { |
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223 return CRS.decode(epsg); |
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224 } |
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225 catch (FactoryException fe) { |
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226 log.error( |
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227 "unable to get CoordinateReferenceSystem for: " + epsg, |
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228 fe); |
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229 } |
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230 |
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231 return null; |
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232 } |
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233 |
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234 |
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235 public static Envelope transform(Envelope orig, String targetSrs) { |
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236 return transform(orig, targetSrs, DEFAULT_EPSG); |
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237 } |
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238 |
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239 |
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240 public static Envelope transform( |
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241 Envelope orig, |
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242 String targetSrs, |
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243 String origSrs |
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244 ) { |
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245 if (targetSrs == null || orig == null || origSrs == null) { |
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246 log.warn("unable to transform envelope: empty parameters"); |
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247 return orig; |
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248 } |
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249 |
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250 log.debug("Transform envlope to '" + targetSrs + "'"); |
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251 try { |
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252 CoordinateReferenceSystem sourceCRS = |
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253 getCoordinateReferenceSystem(origSrs); |
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254 |
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255 CoordinateReferenceSystem targetCRS = |
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256 getCoordinateReferenceSystem(targetSrs); |
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257 |
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258 if (sourceCRS != null && targetCRS != null) { |
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259 ReferencedEnvelope tmpEnv = |
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260 new ReferencedEnvelope(orig, CRS.decode(origSrs)); |
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261 |
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262 Envelope target = tmpEnv.transform(targetCRS, false); |
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263 |
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264 if (log.isDebugEnabled()) { |
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265 log.debug(" orig envelope : " + orig); |
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266 log.debug(" transformed envelope: " + target); |
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267 } |
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268 |
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269 return target; |
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270 } |
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271 } |
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272 catch (NoSuchAuthorityCodeException nsae) { |
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273 log.error("Cannot get CoordinateReferenceSystem!", nsae); |
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274 } |
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275 catch (FactoryException fe) { |
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276 log.error("Cannot get CoordinateReferenceSystem!", fe); |
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277 } |
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278 catch (TransformException te) { |
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279 log.error("Cannot transform envelope from source " |
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280 + origSrs + " to target srs " + targetSrs); |
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281 } |
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282 |
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283 return null; |
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284 } |
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285 |
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286 |
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287 public static boolean writeShapefile(File shape, |
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288 SimpleFeatureType featureType, FeatureCollection<?, ?> collection) { |
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289 return writeShapefile(shape, featureType, collection, |
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290 featureType.getCoordinateReferenceSystem()); |
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291 } |
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292 |
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293 |
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294 public static boolean writeShapefile(File shape, |
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295 SimpleFeatureType featureType, FeatureCollection<?, ?> collection, |
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296 CoordinateReferenceSystem crs) { |
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297 if (collection.isEmpty()) { |
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298 log.warn("Shapefile is not written - no features given!"); |
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299 return false; |
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300 } |
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301 |
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302 Transaction transaction = null; |
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303 |
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304 try { |
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305 MathTransform transform = CRS.findMathTransform( |
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306 CRS.decode(DEFAULT_EPSG), crs); |
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307 |
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308 Map<String, Serializable> params = |
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309 new HashMap<String, Serializable>(); |
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310 |
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311 params.put("url", shape.toURI().toURL()); |
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312 params.put("create spatial index", Boolean.TRUE); |
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313 |
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314 DataStoreFactorySpi dataStoreFactory = |
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315 new ShapefileDataStoreFactory(); |
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316 |
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317 ShapefileDataStore newDataStore = |
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318 (ShapefileDataStore)dataStoreFactory.createNewDataStore(params); |
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319 newDataStore.createSchema(featureType); |
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320 |
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321 transaction = new DefaultTransaction("create"); |
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322 |
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323 String typeName = newDataStore.getTypeNames()[0]; |
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324 |
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325 FeatureWriter<SimpleFeatureType, SimpleFeature> writer = |
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326 newDataStore.getFeatureWriter(typeName, transaction); |
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327 |
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328 SimpleFeatureIterator iterator = (SimpleFeatureIterator) collection.features(); |
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329 |
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330 while (iterator.hasNext()){ |
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331 SimpleFeature feature = iterator.next(); |
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332 SimpleFeature copy = writer.next(); |
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333 |
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334 copy.setAttributes(feature.getAttributes()); |
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335 |
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336 Geometry orig = (Geometry) feature.getDefaultGeometry(); |
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337 Geometry reprojected = JTS.transform(orig, transform); |
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338 |
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339 copy.setDefaultGeometry(reprojected); |
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340 writer.write(); |
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341 } |
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342 |
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343 transaction.commit(); |
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344 |
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345 return true; |
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346 } |
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347 catch (MalformedURLException mue) { |
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348 log.error("Unable to prepare shapefile: " + mue.getMessage()); |
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349 } |
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350 catch (IOException ioe) { |
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351 log.error("Unable to write shapefile: " + ioe.getMessage()); |
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352 } |
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353 catch (NoSuchAuthorityCodeException nsae) { |
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354 log.error("Cannot get CoordinateReferenceSystem for '" |
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355 + DEFAULT_EPSG + "'"); |
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356 } |
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357 catch (FactoryException fe) { |
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358 log.error("Cannot get CoordinateReferenceSystem for '" |
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359 + DEFAULT_EPSG + "'"); |
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360 } |
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361 catch (TransformException te) { |
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362 log.error("Was not able to transform geometry!", te); |
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363 } |
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364 finally { |
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365 if (transaction != null) { |
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366 try { |
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367 transaction.close(); |
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368 } |
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369 catch (IOException ioe) { /* do nothing */ } |
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370 } |
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371 } |
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372 |
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373 return false; |
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374 } |
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375 } |
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376 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |