Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/exports/ChartInfoGenerator.java @ 7087:ada424214b02 generator-refactoring

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Use Object instead of DOM Element as argument for setup of out generators. First step to remove dependency to XML DOM when using configuration.
author Sascha L. Teichmann <teichmann@intevation.de>
date Sun, 22 Sep 2013 21:05:12 +0200
parents 0a337f0005c2
children 41567bf1e131
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 import org.w3c.dom.Element;
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27
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28 import org.apache.log4j.Logger;
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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 logger used in this generator.*/
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58 private static Logger logger =
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59 Logger.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 logger.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(String outName, Document request, OutputStream out, CallContext context) {
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86 this.out = out;
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87
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88 generator.init(outName, request, out, context);
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89 }
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90
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91
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92 /**
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93 * Dispatches the operation to the instantiated generator.
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94 *
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95 * @param master The master artifact
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96 */
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97 public void setMasterArtifact(Artifact master) {
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98 generator.setMasterArtifact(master);
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99 }
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100
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101
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102 /**
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103 * Dispatches the operation to the instantiated generator.
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104 *
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105 * @param collection The collection.
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106 */
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107 public void setCollection(D4EArtifactCollection collection) {
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108 generator.setCollection(collection);
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109 }
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110
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111
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112 /**
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113 * Dispatches the operation to the instantiated generator.
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114 */
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115 @Override
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116 public void doOut(
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117 ArtifactAndFacet artifactFacet,
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118 ThemeDocument attr,
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119 boolean visible
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120 ) {
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121 generator.doOut(artifactFacet, attr, visible);
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122 }
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123
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124
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125 /**
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126 * This method generates the chart using a concrete ChartGenerator but
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127 * doesn't write the chart itself to the OutputStream but a Document that
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128 * contains meta information of the created chart.
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129 */
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130 @Override
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131 public void generate()
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132 throws IOException
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133 {
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134 logger.debug("ChartInfoGenerator.generate");
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135
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136 JFreeChart chart = generator.generateChart();
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137
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138 int[] size = generator.getSize();
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139 if (size == null) {
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140 size = generator.getDefaultSize();
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141 }
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142
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143 ChartRenderingInfo info = new ChartRenderingInfo();
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144
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145 long startTime = System.currentTimeMillis();
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146
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147 if (USE_NOP_GRAPHICS) {
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148 BufferedImage image =
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149 new BufferedImage(size[0], size[1], Transparency.BITMASK);
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150
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151 Graphics2D g2d = image.createGraphics();
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152 Graphics2D nop = new NOPGraphics2D(g2d);
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153
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154 chart.draw(
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155 nop,
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156 new Rectangle2D.Double(0, 0, size[0], size[1]),
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157 null,
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158 info);
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159
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160 nop.dispose();
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161 }
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162 else {
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163 chart.createBufferedImage(
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164 size[0], size[1], Transparency.BITMASK, info);
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165 }
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166
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167 long stopTime = System.currentTimeMillis();
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168
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169 if (logger.isDebugEnabled()) {
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170 logger.debug("Rendering info took: " +
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171 (stopTime-startTime) + "ms");
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172 }
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173
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174
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175 InfoGeneratorHelper helper = new InfoGeneratorHelper(generator);
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176 Document doc = helper.createInfoDocument(chart, info);
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177
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178 XMLUtils.toStream(doc, out);
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179 }
1979
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180
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181
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182 /**
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183 * A proxy method which calls <i>generator</i>.getSettings() and returns its
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184 * return value.
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185 *
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186 * @return a Settings object provided by <i>generator</i>.
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187 */
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188 @Override
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189 public Settings getSettings() {
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190 return generator.getSettings();
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191 }
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192
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193
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194 /**
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195 * A proxy method which calls <i>generator</i>.setSettings().
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196 *
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197 * @param settings A settings object for the <i>generator</i>.
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198 */
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199 @Override
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200 public void setSettings(Settings settings) {
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201 generator.setSettings(settings);
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202 }
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203 }
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204 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org