Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/exports/ChartInfoGenerator.java @ 6611:dfdeed3e997e

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Shorten and correct waterlevel not in gauge string
author Andre Heinecke <aheinecke@intevation.de>
date Thu, 18 Jul 2013 17:54:44 +0200
parents af13ceeba52a
children 1b35b2ddfc28
rev   line source
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4897a58c8746 River artifacts: Added new copyright headers.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 5838
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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.exports;
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10
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11 import org.dive4elements.river.collections.D4EArtifactCollection;
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12 import org.dive4elements.river.java2d.NOPGraphics2D;
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13
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14 import java.io.IOException;
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15 import java.io.OutputStream;
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16
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17 import java.awt.Transparency;
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18 import java.awt.Graphics2D;
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19
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20 import java.awt.geom.Rectangle2D;
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21
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22 import java.awt.image.BufferedImage;
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23
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24 import org.w3c.dom.Document;
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25
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26 import org.apache.log4j.Logger;
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27
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28 import org.jfree.chart.ChartRenderingInfo;
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29 import org.jfree.chart.JFreeChart;
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30
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31 import org.dive4elements.artifacts.Artifact;
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32 import org.dive4elements.artifacts.CallContext;
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33
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34 import org.dive4elements.artifactdatabase.state.ArtifactAndFacet;
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35 import org.dive4elements.artifactdatabase.state.Settings;
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36
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37 import org.dive4elements.artifacts.common.utils.XMLUtils;
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38
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39
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40 /**
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41 * An OutGenerator that generates meta information for charts. A concrete
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42 * ChartInfoGenerator need to instantiate a concrete ChartGenerator and dispatch
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43 * the methods to that instance. The only thing this ChartInfoGenerator needs
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44 * to, is to overwrite the generate() method which doesn't write the chart image
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45 * to the OutputStream but a Document that contains some meta information of the
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46 * created chart.
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47 *
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48 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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49 */
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50 public abstract class ChartInfoGenerator implements OutGenerator {
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51
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52 public static final boolean USE_NOP_GRAPHICS =
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53 Boolean.getBoolean("info.rendering.nop.graphics");
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54
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55 /** The logger used in this generator.*/
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56 private static Logger logger =
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57 Logger.getLogger(ChartInfoGenerator.class);
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58
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59
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60 /** The OutGenerator that creates the charts.*/
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61 protected ChartGenerator generator;
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62
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63 protected OutputStream out;
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64
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66
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67 public ChartInfoGenerator(ChartGenerator generator) {
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68 this.generator = generator;
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69 }
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70
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71
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72 /**
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73 * Dispatches the operation to the instantiated generator.
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74 *
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75 * @param request
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76 * @param out
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77 * @param context
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78 */
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79 public void init(Document request, OutputStream out, CallContext context) {
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80 this.out = out;
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81
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82 generator.init(request, out, context);
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83 }
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85
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86 /**
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87 * Dispatches the operation to the instantiated generator.
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88 *
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89 * @param master The master artifact
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90 */
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91 public void setMasterArtifact(Artifact master) {
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92 generator.setMasterArtifact(master);
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93 }
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94
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95
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96 /**
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97 * Dispatches the operation to the instantiated generator.
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98 *
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99 * @param collection The collection.
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100 */
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101 public void setCollection(D4EArtifactCollection collection) {
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102 generator.setCollection(collection);
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103 }
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104
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105
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106 /**
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107 * Dispatches the operation to the instantiated generator.
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108 */
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109 public void doOut(
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110 ArtifactAndFacet artifactFacet,
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111 Document attr,
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112 boolean visible
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113 ) {
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114 generator.doOut(artifactFacet, attr, visible);
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115 }
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116
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117
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118 /**
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119 * This method generates the chart using a concrete ChartGenerator but
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120 * doesn't write the chart itself to the OutputStream but a Document that
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121 * contains meta information of the created chart.
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122 */
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123 @Override
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124 public void generate()
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125 throws IOException
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126 {
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127 logger.debug("ChartInfoGenerator.generate");
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128
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129 JFreeChart chart = generator.generateChart();
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130
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131 int[] size = generator.getSize();
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132 if (size == null) {
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133 size = generator.getDefaultSize();
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134 }
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135
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136 ChartRenderingInfo info = new ChartRenderingInfo();
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137
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138 long startTime = System.currentTimeMillis();
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139
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140 if (USE_NOP_GRAPHICS) {
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141 BufferedImage image =
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142 new BufferedImage(size[0], size[1], Transparency.BITMASK);
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143
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144 Graphics2D g2d = image.createGraphics();
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145 Graphics2D nop = new NOPGraphics2D(g2d);
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146
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147 chart.draw(
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148 nop,
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149 new Rectangle2D.Double(0, 0, size[0], size[1]),
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150 null,
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151 info);
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152
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153 nop.dispose();
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154 }
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155 else {
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156 chart.createBufferedImage(
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157 size[0], size[1], Transparency.BITMASK, info);
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158 }
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159
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160 long stopTime = System.currentTimeMillis();
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161
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162 if (logger.isDebugEnabled()) {
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163 logger.debug("Rendering info took: " +
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164 (stopTime-startTime) + "ms");
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165 }
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166
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167
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168 InfoGeneratorHelper helper = new InfoGeneratorHelper(generator);
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169 Document doc = helper.createInfoDocument(chart, info);
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170
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171 XMLUtils.toStream(doc, out);
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172 }
1979
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173
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174
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175 /**
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176 * A proxy method which calls <i>generator</i>.getSettings() and returns its
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177 * return value.
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178 *
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179 * @return a Settings object provided by <i>generator</i>.
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180 */
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181 @Override
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182 public Settings getSettings() {
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183 return generator.getSettings();
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184 }
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185
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186
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187 /**
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188 * A proxy method which calls <i>generator</i>.setSettings().
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189 *
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190 * @param settings A settings object for the <i>generator</i>.
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191 */
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192 @Override
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193 public void setSettings(Settings settings) {
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194 generator.setSettings(settings);
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195 }
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196 }
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197 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org