Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/exports/ChartInfoGenerator.java @ 655:913b52064449
Refactored version of "Berechnung 4"
flys-artifacts/trunk@2053 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Sun, 05 Jun 2011 18:24:46 +0000 |
parents | 67c7020f4ed3 |
children | b22f21b173a7 |
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1 package de.intevation.flys.exports; |
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2 |
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3 import java.awt.Transparency; |
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4 import java.io.IOException; |
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5 import java.io.OutputStream; |
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6 |
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7 import org.w3c.dom.Document; |
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8 |
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9 import org.apache.log4j.Logger; |
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10 |
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11 import org.jfree.chart.ChartRenderingInfo; |
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12 import org.jfree.chart.JFreeChart; |
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13 |
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14 import de.intevation.artifacts.Artifact; |
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15 import de.intevation.artifacts.CallContext; |
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16 |
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17 import de.intevation.artifacts.common.utils.XMLUtils; |
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18 |
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19 |
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20 /** |
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21 * An OutGenerator that generates meta information for charts. A concrete |
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22 * ChartInfoGenerator need to instantiate a concrete ChartGenerator and dispatch |
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23 * the methods to that instance. The only thing this ChartInfoGenerator needs |
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24 * to, is to overrite the generate() method which doesn't write the chart image |
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25 * to the OutputStream but a Document that contains some meta information of the |
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26 * created chart. |
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27 * |
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28 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> |
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29 */ |
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30 public abstract class ChartInfoGenerator implements OutGenerator { |
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31 |
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32 /** The logger used in this generator.*/ |
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33 private static Logger logger = |
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34 Logger.getLogger(ChartInfoGenerator.class); |
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35 |
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36 |
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37 /** The OutGenerator that creates the charts.*/ |
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38 protected XYChartGenerator generator; |
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39 |
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40 protected OutputStream out; |
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41 |
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42 |
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43 |
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44 public ChartInfoGenerator(XYChartGenerator generator) { |
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45 this.generator = generator; |
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46 } |
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47 |
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48 |
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49 /** |
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50 * Dispatches the operation to the instantiated generator. |
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51 * |
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52 * @param request |
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53 * @param out |
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54 * @param context |
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55 */ |
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56 public void init(Document request, OutputStream out, CallContext context) { |
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57 this.out = out; |
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58 |
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59 generator.init(request, out, context); |
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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 master |
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67 */ |
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68 public void setMasterArtifact(Artifact master) { |
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69 generator.setMasterArtifact(master); |
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70 } |
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71 |
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72 |
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73 /** |
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74 * Dispatches the operation to the instantiated generator. |
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75 * |
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76 * @param artifacts |
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77 * @param facet |
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78 * @param attr |
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79 */ |
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80 public void doOut(Artifact artifact, String facet, Document attr) { |
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81 generator.doOut(artifact, facet, attr); |
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82 } |
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83 |
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84 |
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85 /** |
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86 * This method generates the chart using a concrete ChartGenerator but |
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87 * doesn't write the chart itself to the OutputStream but a Document that |
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88 * contains meta information of the created chart. |
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89 */ |
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90 @Override |
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91 public void generate() |
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92 throws IOException |
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93 { |
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94 logger.debug("ChartInfoGenerator.generate"); |
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95 |
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96 JFreeChart chart = generator.generateChart(); |
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97 |
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98 int[] size = generator.getSize(); |
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99 |
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100 ChartRenderingInfo info = new ChartRenderingInfo(); |
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101 |
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102 chart.createBufferedImage(size[0], size[1], Transparency.BITMASK, info); |
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103 |
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104 Document doc = InfoGeneratorHelper.createInfoDocument(chart, info); |
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105 |
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106 XMLUtils.toStream(doc, out); |
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107 } |
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108 } |
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109 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |