Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/exports/ChartInfoGenerator.java @ 9801:1d7a72a50183 3.2.x tip

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Assume Compose V2, consistently
author Tom Gottfried <tom@intevation.de>
date Thu, 23 Nov 2023 10:14:13 +0100
parents 0a5239a1e46e
children
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.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 import org.dive4elements.river.themes.ThemeDocument;
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14
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15 import java.io.IOException;
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16 import java.io.OutputStream;
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17
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18 import java.awt.Transparency;
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19 import java.awt.Graphics2D;
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20
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21 import java.awt.geom.Rectangle2D;
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22
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23 import java.awt.image.BufferedImage;
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24
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25 import org.w3c.dom.Document;
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26
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27 import org.apache.logging.log4j.Logger;
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28 import org.apache.logging.log4j.LogManager;
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29
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30 import org.jfree.chart.ChartRenderingInfo;
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31 import org.jfree.chart.JFreeChart;
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32
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33 import org.dive4elements.artifacts.Artifact;
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34 import org.dive4elements.artifacts.CallContext;
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35
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36 import org.dive4elements.artifactdatabase.state.ArtifactAndFacet;
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37 import org.dive4elements.artifactdatabase.state.Settings;
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38
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39 import org.dive4elements.artifacts.common.utils.XMLUtils;
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40
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41
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42 /**
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43 * An OutGenerator that generates meta information for charts. A concrete
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44 * ChartInfoGenerator need to instantiate a concrete ChartGenerator and dispatch
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45 * the methods to that instance. The only thing this ChartInfoGenerator needs
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46 * to, is to overwrite the generate() method which doesn't write the chart image
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47 * to the OutputStream but a Document that contains some meta information of the
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48 * created chart.
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49 *
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50 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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51 */
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52 public abstract class ChartInfoGenerator implements OutGenerator {
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53
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54 public static final boolean USE_NOP_GRAPHICS =
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55 Boolean.getBoolean("info.rendering.nop.graphics");
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56
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57 /** The log used in this generator.*/
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58 private static Logger log =
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59 LogManager.getLogger(ChartInfoGenerator.class);
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60
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61
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62 /** The OutGenerator that creates the charts.*/
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63 protected ChartGenerator generator;
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64
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65 protected OutputStream out;
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66
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67
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68
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69 public ChartInfoGenerator(ChartGenerator generator) {
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70 this.generator = generator;
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71 }
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72
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73 public void setup(Object config) {
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74 log.debug("ChartInfoGenerator.setup");
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75 }
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76
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77
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78 /**
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79 * Dispatches the operation to the instantiated generator.
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80 *
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81 * @param request
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82 * @param out
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83 * @param context
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84 */
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85 public void init(
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86 String outName,
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87 Document request,
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88 OutputStream out,
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89 CallContext context
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90 ) {
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91 this.out = out;
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92
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93 generator.init(outName, request, out, context);
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94 }
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95
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96
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97 /**
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98 * Dispatches the operation to the instantiated generator.
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99 *
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100 * @param master The master artifact
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101 */
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102 public void setMasterArtifact(Artifact master) {
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103 generator.setMasterArtifact(master);
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104 }
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105
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106
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107 /**
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108 * Dispatches the operation to the instantiated generator.
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109 *
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110 * @param collection The collection.
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111 */
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112 public void setCollection(D4EArtifactCollection collection) {
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113 generator.setCollection(collection);
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114 }
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115
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116
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117 /**
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118 * Dispatches the operation to the instantiated generator.
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119 */
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120 @Override
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121 public void doOut(
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122 ArtifactAndFacet artifactFacet,
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123 ThemeDocument attr,
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124 boolean visible
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125 ) {
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126 generator.doOut(artifactFacet, attr, visible);
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127 }
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128
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129
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130 /**
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131 * This method generates the chart using a concrete ChartGenerator but
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132 * doesn't write the chart itself to the OutputStream but a Document that
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133 * contains meta information of the created chart.
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134 */
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135 @Override
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136 public void generate()
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137 throws IOException
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138 {
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139 log.debug("ChartInfoGenerator.generate");
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140
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141 JFreeChart chart = generator.generateChart();
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142
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143 int[] size = generator.getSize();
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144 if (size == null) {
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145 size = generator.getDefaultSize();
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146 }
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147
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148 ChartRenderingInfo info = new ChartRenderingInfo();
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149
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150 long startTime = System.currentTimeMillis();
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151
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152 if (USE_NOP_GRAPHICS) {
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153 BufferedImage image =
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154 new BufferedImage(size[0], size[1], Transparency.BITMASK);
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155
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156 Graphics2D g2d = image.createGraphics();
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157 Graphics2D nop = new NOPGraphics2D(g2d);
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158
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159 chart.draw(
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160 nop,
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161 new Rectangle2D.Double(0, 0, size[0], size[1]),
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162 null,
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163 info);
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164
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165 nop.dispose();
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166 }
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167 else {
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168 chart.createBufferedImage(
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169 size[0], size[1], Transparency.BITMASK, info);
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170 }
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171
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172 long stopTime = System.currentTimeMillis();
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173
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174 if (log.isDebugEnabled()) {
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175 log.debug("Rendering info took: " +
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176 (stopTime-startTime) + "ms");
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177 }
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178
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179
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180 InfoGeneratorHelper helper = new InfoGeneratorHelper(generator);
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181 Document doc = helper.createInfoDocument(chart, info);
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182
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183 XMLUtils.toStream(doc, out);
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184 }
1979
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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>.getSettings() and returns its
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189 * return value.
1979
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190 *
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191 * @return a Settings object provided by <i>generator</i>.
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192 */
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193 @Override
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194 public Settings getSettings() {
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195 return generator.getSettings();
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196 }
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197
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198
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199 /**
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200 * A proxy method which calls <i>generator</i>.setSettings().
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201 *
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202 * @param settings A settings object for the <i>generator</i>.
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203 */
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204 @Override
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205 public void setSettings(Settings settings) {
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206 generator.setSettings(settings);
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207 }
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208 }
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209 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org