Mercurial > dive4elements > gnv-client
annotate gnv-artifacts/src/main/java/de/intevation/gnv/state/CoordinateSelectionState.java @ 1117:dec4257ad570
Changed imports to fit new positions of XMLUtils and Config
gnv-artifacts/trunk@1478 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Tue, 15 Mar 2011 16:13:39 +0000 |
parents | f953c9a559d8 |
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1115
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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.artifacts.common.utils.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 |
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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 : |