Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/exports/ChartInfoGenerator.java @ 2047:0318fa6f0844

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Make use of first attributes specified in the ChartSettings. NOTE: work is still in progress. flys-artifacts/trunk@3535 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Fri, 23 Dec 2011 08:57:25 +0000
parents a7c437c9547e
children 49b7c2b1a6a7
rev   line source
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1 package de.intevation.flys.exports;
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3 import de.intevation.flys.java2d.NOPGraphics2D;
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5 import java.io.IOException;
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6 import java.io.OutputStream;
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7
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8 import java.awt.Transparency;
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9 import java.awt.Graphics2D;
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10
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11 import java.awt.geom.Rectangle2D;
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12
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13 import java.awt.image.BufferedImage;
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15 import org.w3c.dom.Document;
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16
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17 import org.apache.log4j.Logger;
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18
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19 import org.jfree.chart.ChartRenderingInfo;
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20 import org.jfree.chart.JFreeChart;
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21
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22 import de.intevation.artifacts.Artifact;
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23 import de.intevation.artifacts.CallContext;
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24
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25 import de.intevation.artifactdatabase.state.ArtifactAndFacet;
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26 import de.intevation.artifactdatabase.state.Settings;
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28 import de.intevation.artifacts.common.utils.XMLUtils;
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29
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30
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31 /**
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32 * An OutGenerator that generates meta information for charts. A concrete
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33 * ChartInfoGenerator need to instantiate a concrete ChartGenerator and dispatch
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34 * the methods to that instance. The only thing this ChartInfoGenerator needs
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35 * to, is to overrite the generate() method which doesn't write the chart image
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36 * to the OutputStream but a Document that contains some meta information of the
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37 * created chart.
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38 *
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39 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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40 */
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41 public abstract class ChartInfoGenerator implements OutGenerator {
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42
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43 public static final boolean USE_NOP_GRAPHICS =
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44 Boolean.getBoolean("info.rendering.nop.graphics");
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45
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46 /** The logger used in this generator.*/
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47 private static Logger logger =
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48 Logger.getLogger(ChartInfoGenerator.class);
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49
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50
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51 /** The OutGenerator that creates the charts.*/
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52 protected XYChartGenerator generator;
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53
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54 protected OutputStream out;
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55
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57
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58 public ChartInfoGenerator(XYChartGenerator generator) {
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59 this.generator = generator;
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60 }
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61
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62
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63 /**
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64 * Dispatches the operation to the instantiated generator.
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65 *
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66 * @param request
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67 * @param out
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68 * @param context
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69 */
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70 public void init(Document request, OutputStream out, CallContext context) {
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71 this.out = out;
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72
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73 generator.init(request, out, context);
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74 }
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76
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77 /**
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78 * Dispatches the operation to the instantiated generator.
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79 *
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80 * @param master The master artifact
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81 */
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82 public void setMasterArtifact(Artifact master) {
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83 generator.setMasterArtifact(master);
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84 }
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86
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87 /**
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88 * Dispatches the operation to the instantiated generator.
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89 */
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90 public void doOut(
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91 ArtifactAndFacet artifactFacet,
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92 Document attr,
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93 boolean visible
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94 ) {
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95 generator.doOut(artifactFacet, attr, visible);
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96 }
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98
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99 /**
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100 * This method generates the chart using a concrete ChartGenerator but
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101 * doesn't write the chart itself to the OutputStream but a Document that
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102 * contains meta information of the created chart.
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103 */
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104 @Override
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105 public void generate()
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106 throws IOException
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107 {
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108 logger.debug("ChartInfoGenerator.generate");
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109
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110 JFreeChart chart = generator.generateChart();
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111
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112 int[] size = generator.getSize();
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113
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114 ChartRenderingInfo info = new ChartRenderingInfo();
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115
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116 long startTime = System.currentTimeMillis();
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117
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118 if (USE_NOP_GRAPHICS) {
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119 BufferedImage image =
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120 new BufferedImage(size[0], size[1], Transparency.BITMASK);
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121
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122 Graphics2D g2d = image.createGraphics();
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123 Graphics2D nop = new NOPGraphics2D(g2d);
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124
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125 chart.draw(
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126 nop,
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127 new Rectangle2D.Double(0, 0, size[0], size[1]),
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128 null,
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129 info);
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130
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131 nop.dispose();
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132 }
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133 else {
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134 chart.createBufferedImage(
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135 size[0], size[1], Transparency.BITMASK, info);
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136 }
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137
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138 long stopTime = System.currentTimeMillis();
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139
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140 if (logger.isDebugEnabled()) {
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141 logger.debug("Rendering info took: " +
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142 (stopTime-startTime) + "ms");
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143 }
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144
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145
673
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146 InfoGeneratorHelper helper = new InfoGeneratorHelper(generator);
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147 Document doc = helper.createInfoDocument(chart, info);
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148
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149 XMLUtils.toStream(doc, out);
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150 }
1979
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151
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152
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153 /**
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154 * A proxy method which calls <i>generator</i>.getSettings() and returns its
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155 * return value.
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156 *
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157 * @return a Settings object provided by <i>generator</i>.
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158 */
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159 @Override
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160 public Settings getSettings() {
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161 return generator.getSettings();
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162 }
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163
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164
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165 /**
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166 * A proxy method which calls <i>generator</i>.setSettings().
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167 *
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168 * @param settings A settings object for the <i>generator</i>.
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169 */
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170 @Override
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171 public void setSettings(Settings settings) {
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172 generator.setSettings(settings);
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173 }
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174 }
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175 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org