Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/state/CoordinateSelectionState.java @ 1115:f953c9a559d8

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Added license file and license headers. gnv-artifacts/trunk@1260 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Tue, 02 Nov 2010 17:46:55 +0000
parents 05bf8534a35a
children dec4257ad570
rev   line source
1115
f953c9a559d8 Added license file and license headers.
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1 /*
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2 * Copyright (c) 2010 by Intevation GmbH
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3 *
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4 * This program is free software under the LGPL (>=v2.1)
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5 * Read the file LGPL.txt coming with the software for details
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6 * or visit http://www.gnu.org/licenses/ if it does not exist.
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7 */
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8
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9 package de.intevation.gnv.state;
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10
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11 import java.util.ArrayList;
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12 import java.util.Collection;
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13 import java.util.HashMap;
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14 import java.util.Iterator;
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15 import java.util.List;
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16
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17 import org.apache.log4j.Logger;
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18 import org.w3c.dom.Element;
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19 import org.w3c.dom.Node;
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20 import org.w3c.dom.NodeList;
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21
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22 import com.vividsolutions.jts.geom.Point;
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23
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24 import de.intevation.artifactdatabase.Config;
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25 import de.intevation.gnv.geobackend.base.Result;
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26 import de.intevation.gnv.state.describedata.DefaultKeyValueDescribeData;
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27 import de.intevation.gnv.state.describedata.KeyValueDescibeData;
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28 import de.intevation.gnv.state.describedata.NamedArrayList;
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29 import de.intevation.gnv.state.describedata.NamedCollection;
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30 import de.intevation.gnv.utils.ArtifactXMLUtilities;
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31 import de.intevation.gnv.utils.InputValidator;
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32 import de.intevation.gnv.utils.WKTUtils;
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33 import de.intevation.gnv.utils.exception.ValidationException;
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34
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35 /**
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36 * This state handles coordinate input by the user. It searches database results
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37 * for coordinates and turns them into a human readable form.
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38 *
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39 * @author <a href="mailto:tim.englich@intevation.de">Tim Englich</a>
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40 *
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41 */
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42 public class CoordinateSelectionState extends StateBase {
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43
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44 /**
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45 * the logger, used to log exceptions and additonaly information
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46 */
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47 private static Logger log = Logger.getLogger(CoordinateSelectionState.class);
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48
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49 /**
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50 * The UID of this Class
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51 */
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52 private static final long serialVersionUID = 6318923553625195063L;
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53
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54 /**
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55 * XPATH Expressions for the setup.
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56 */
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57
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58 private final static String MESH_WIDTH_XPATH = "mesh-width";
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59 private final static String XLINK_XPATH = "xlink:href";
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60 private final static String MESH_LIST_XPATH = "/mesh-widths/mesh";
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61 private final static String ID_XPATH = "id";
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62 private final static String WIDTH_VALUE_XPATH = "width";
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63
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64 /**
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65 * Holds all given Widths between two MeshPoints for different Meshes.
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66 */
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67 private HashMap<String, Double> meshWidths = null;
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68
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69 /**
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70 * Constructor
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71 */
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72 public CoordinateSelectionState() {
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73 super();
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74 }
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75
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76 @Override
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77 protected List<Object> purifyResult(Collection<Result> result, String uuid) {
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78 log.debug("CoordinateSelectionState.purifyResult");
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79 List<Object> describeData = new ArrayList<Object>();
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80
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81 NamedCollection<KeyValueDescibeData> keyValueDescibeData =
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82 extractKVP(result, "FEATUREID", "SHAPE");
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83
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84 describeData.add(keyValueDescibeData);
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85 return describeData;
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86 }
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87
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88
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89 @Override
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90 protected String prepareInputData4RegionDBQuery(String value) {
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91 log.debug("CoordinateSelectionState.prepareInputData4RegionDBQuery");
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92 double distance=0.;
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93 String returnValue = null;
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94 try {
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95 Point center = InputValidator.getPointValue(value);
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96 String meshId = super.inputData.get("meshid").getValue();
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97 int segments = 97;
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98 if (meshWidths != null){
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99 Double distanceValue = this.meshWidths.get(meshId);
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100 if (distanceValue != null){
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101 log.debug("User "+distanceValue+" as Buffer around given Point");
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102 distance = distanceValue.doubleValue();
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103 }else{
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104 log.warn("No distance is configured for Mesh with id"+ meshId);
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105 }
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106 }else{
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107 log.warn("No MeshWidth configured. Check if this is correct.");
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108 }
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109 returnValue = center.buffer(distance,segments).toText();
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110 } catch (NumberFormatException e) {
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111 log.error(e,e);
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112 } catch (ValidationException e) {
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113 log.error(e,e);
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114 }
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115 return returnValue;
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116
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117 }
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118
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119
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120 @Override
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121 protected NamedCollection<KeyValueDescibeData> extractKVP(
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122 Collection<Result> result,
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123 String keyid,
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124 String valueid) {
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125 Iterator<Result> rit = result.iterator();
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126 NamedCollection<KeyValueDescibeData> keyValueDescibeData = new NamedArrayList<KeyValueDescibeData>(
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127 this.dataName, result.size());
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128 keyValueDescibeData.setMultiSelect(this.dataMultiSelect);
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129 String prevKey = null;
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130 while (rit.hasNext()) {
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131 Result resultValue = rit.next();
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132 String key = resultValue.getString(keyid);
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133 if(prevKey == null || !prevKey.equals(key)){ // TODO: FIXME: We have to do that because the arcsde does not support a distinct Query on Layers
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134 String geomString = CoordinateSelectionState.convert2DisplayCoordinate(resultValue.getString(valueid));
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135 String value = geomString;
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136 if (resultValue.getResultDescriptor().getColumnIndex("VALUE") > 0){
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137 value = resultValue.getString("VALUE") + " - "+value;
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138 }
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139
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140
335
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141 keyValueDescibeData.add(new DefaultKeyValueDescribeData(key,value ));
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142 }
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143 prevKey = key;
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144 }
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145 return keyValueDescibeData;
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146 }
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147
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148 /**
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149 * Turn coordinate into a human readable format.
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150 *
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151 * @param wkt Coordinate as wkt string.
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152 * @return formatted coordinate.
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153 */
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154 protected static String convert2DisplayCoordinate(String wkt){
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155 return WKTUtils.toText(wkt);
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156 }
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157
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158
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159 @Override
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160 public void setup(Node configuration) {
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161 super.setup(configuration);
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162 Element widthElement = (Element)Config.getNodeXPath(configuration, MESH_WIDTH_XPATH);
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163
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164 if (widthElement != null){
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165 String fileName = widthElement.getAttribute(XLINK_XPATH);
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166 fileName = Config.replaceConfigDir(fileName);
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167 Node configurationNode = new ArtifactXMLUtilities().readConfiguration(fileName);
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168 NodeList meshNodes = Config.getNodeSetXPath(configurationNode,MESH_LIST_XPATH );
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169 if (meshNodes != null){
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170 meshWidths = new HashMap<String, Double>(meshNodes.getLength());
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171 for (int i = 0; i < meshNodes.getLength(); i++){
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172 Element meshNode = (Element)meshNodes.item(i);
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173 String id = meshNode.getAttribute(ID_XPATH);
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174 Double value = Double.parseDouble(meshNode.getAttribute(WIDTH_VALUE_XPATH));
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175 meshWidths.put(id, value);
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176 }
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177 }
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178 }else{
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179 log.warn("No Mesh Width defined.");
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180 }
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181 }
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182 }
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183 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org