Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/exports/ChartInfoGenerator.java @ 653:67c7020f4ed3
Refactored the chart creation in the ChartInfoGenerators. Now, every chart is created by the XYChartGenerator again.
flys-artifacts/trunk@2048 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
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date | Fri, 03 Jun 2011 07:20:39 +0000 |
parents | bb484489d3df |
children | 913b52064449 |
rev | line source |
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Introduced a new output generators for creating chart info documents.
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1 package de.intevation.flys.exports; |
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2 |
653
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3 import java.awt.Color; |
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4 import java.awt.Transparency; |
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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 org.w3c.dom.Document; |
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9 |
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10 import org.apache.log4j.Logger; |
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11 |
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12 import org.jfree.chart.ChartFactory; |
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13 import org.jfree.chart.ChartRenderingInfo; |
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14 import org.jfree.chart.JFreeChart; |
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15 import org.jfree.chart.plot.PlotOrientation; |
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16 import org.jfree.chart.plot.XYPlot; |
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17 |
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18 import de.intevation.artifacts.Artifact; |
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19 import de.intevation.artifacts.CallContext; |
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20 |
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21 import de.intevation.artifacts.common.utils.XMLUtils; |
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22 |
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23 |
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24 /** |
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25 * An OutGenerator that generates meta information for charts. A concrete |
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26 * ChartInfoGenerator need to instantiate a concrete ChartGenerator and dispatch |
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27 * the methods to that instance. The only thing this ChartInfoGenerator needs |
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28 * to, is to overrite the generate() method which doesn't write the chart image |
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29 * to the OutputStream but a Document that contains some meta information of the |
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30 * created chart. |
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31 * |
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32 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> |
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33 */ |
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34 public abstract class ChartInfoGenerator implements OutGenerator { |
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35 |
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36 /** The logger used in this generator.*/ |
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37 private static Logger logger = |
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38 Logger.getLogger(ChartInfoGenerator.class); |
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39 |
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40 |
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41 /** The OutGenerator that creates the charts.*/ |
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42 protected XYChartGenerator generator; |
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43 |
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44 protected OutputStream out; |
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45 |
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46 |
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47 |
653
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48 public ChartInfoGenerator(XYChartGenerator generator) { |
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49 this.generator = generator; |
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50 } |
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51 |
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52 |
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53 /** |
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54 * Dispatches the operation to the instantiated generator. |
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55 * |
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56 * @param request |
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57 * @param out |
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58 * @param context |
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59 */ |
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60 public void init(Document request, OutputStream out, CallContext context) { |
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61 this.out = out; |
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62 |
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63 generator.init(request, out, context); |
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64 } |
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65 |
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66 |
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67 /** |
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68 * Dispatches the operation to the instantiated generator. |
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69 * |
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70 * @param master |
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71 */ |
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72 public void setMasterArtifact(Artifact master) { |
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73 generator.setMasterArtifact(master); |
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74 } |
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75 |
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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 artifacts |
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81 * @param facet |
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82 * @param attr |
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83 */ |
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84 public void doOut(Artifact artifact, String facet, Document attr) { |
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85 generator.doOut(artifact, facet, attr); |
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86 } |
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87 |
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88 |
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89 /** |
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90 * This method generates the chart using a concrete ChartGenerator but |
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91 * doesn't write the chart itself to the OutputStream but a Document that |
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92 * contains meta information of the created chart. |
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93 */ |
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94 @Override |
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95 public void generate() |
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96 throws IOException |
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97 { |
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98 logger.debug("ChartInfoGenerator.generate"); |
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99 |
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100 JFreeChart chart = generator.generateChart(); |
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101 |
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102 int[] size = generator.getSize(); |
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103 |
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104 ChartRenderingInfo info = new ChartRenderingInfo(); |
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105 |
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106 chart.createBufferedImage(size[0], size[1], Transparency.BITMASK, info); |
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107 |
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108 Document doc = InfoGeneratorHelper.createInfoDocument(chart, info); |
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109 |
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110 XMLUtils.toStream(doc, out); |
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111 } |
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112 } |
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113 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |