Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/exports/ChartInfoGenerator.java @ 1948:65f9d707caff
Removed superfluous imports.
flys-artifacts/trunk@3340 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Wed, 30 Nov 2011 12:06:32 +0000 |
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1 package de.intevation.flys.exports; |
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2 |
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3 import de.intevation.flys.java2d.NOPGraphics2D; |
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4 |
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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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14 |
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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 |
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27 import de.intevation.artifacts.common.utils.XMLUtils; |
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28 |
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29 |
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30 /** |
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31 * An OutGenerator that generates meta information for charts. A concrete |
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32 * ChartInfoGenerator need to instantiate a concrete ChartGenerator and dispatch |
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33 * the methods to that instance. The only thing this ChartInfoGenerator needs |
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34 * to, is to overrite the generate() method which doesn't write the chart image |
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35 * to the OutputStream but a Document that contains some meta information of the |
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36 * created chart. |
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37 * |
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38 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> |
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39 */ |
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40 public abstract class ChartInfoGenerator implements OutGenerator { |
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41 |
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42 public static final boolean USE_NOP_GRAPHICS = |
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43 Boolean.getBoolean("info.rendering.nop.graphics"); |
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44 |
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45 /** The logger used in this generator.*/ |
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46 private static Logger logger = |
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47 Logger.getLogger(ChartInfoGenerator.class); |
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48 |
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49 |
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50 /** The OutGenerator that creates the charts.*/ |
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51 protected XYChartGenerator generator; |
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52 |
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53 protected OutputStream out; |
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54 |
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55 |
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56 |
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57 public ChartInfoGenerator(XYChartGenerator generator) { |
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58 this.generator = generator; |
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59 } |
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60 |
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61 |
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62 /** |
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63 * Dispatches the operation to the instantiated generator. |
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64 * |
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65 * @param request |
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66 * @param out |
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67 * @param context |
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68 */ |
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69 public void init(Document request, OutputStream out, CallContext context) { |
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70 this.out = out; |
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71 |
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72 generator.init(request, out, context); |
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73 } |
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74 |
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75 |
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76 /** |
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77 * Dispatches the operation to the instantiated generator. |
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78 * |
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79 * @param master The master artifact |
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80 */ |
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81 public void setMasterArtifact(Artifact master) { |
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82 generator.setMasterArtifact(master); |
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83 } |
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84 |
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85 |
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86 /** |
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87 * Dispatches the operation to the instantiated generator. |
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88 */ |
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89 public void doOut( |
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90 ArtifactAndFacet artifactFacet, |
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91 Document attr, |
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92 boolean visible |
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93 ) { |
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94 generator.doOut(artifactFacet, attr, visible); |
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95 } |
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96 |
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97 |
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98 /** |
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99 * This method generates the chart using a concrete ChartGenerator but |
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100 * doesn't write the chart itself to the OutputStream but a Document that |
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101 * contains meta information of the created chart. |
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102 */ |
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103 @Override |
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104 public void generate() |
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105 throws IOException |
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106 { |
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107 logger.debug("ChartInfoGenerator.generate"); |
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108 |
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109 JFreeChart chart = generator.generateChart(); |
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110 |
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111 int[] size = generator.getSize(); |
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112 |
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113 ChartRenderingInfo info = new ChartRenderingInfo(); |
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114 |
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115 long startTime = System.currentTimeMillis(); |
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116 |
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117 if (USE_NOP_GRAPHICS) { |
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118 BufferedImage image = |
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119 new BufferedImage(size[0], size[1], Transparency.BITMASK); |
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120 |
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121 Graphics2D g2d = image.createGraphics(); |
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122 Graphics2D nop = new NOPGraphics2D(g2d); |
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123 |
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124 chart.draw( |
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125 nop, |
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126 new Rectangle2D.Double(0, 0, size[0], size[1]), |
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127 null, |
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128 info); |
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129 |
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130 nop.dispose(); |
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131 } |
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132 else { |
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133 chart.createBufferedImage( |
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134 size[0], size[1], Transparency.BITMASK, info); |
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135 } |
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136 |
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137 long stopTime = System.currentTimeMillis(); |
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138 |
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139 if (logger.isDebugEnabled()) { |
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140 logger.debug("Rendering info took: " + |
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141 (stopTime-startTime) + "ms"); |
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142 } |
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143 |
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144 |
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145 InfoGeneratorHelper helper = new InfoGeneratorHelper(generator); |
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146 Document doc = helper.createInfoDocument(chart, info); |
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147 |
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148 XMLUtils.toStream(doc, out); |
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149 } |
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150 } |
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151 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |