Mercurial > dive4elements > gnv-client
annotate gnv-artifacts/src/main/java/de/intevation/gnv/exports/ChartExportHelper.java @ 617:3d13fa281a7e
Added new ouput mode: histogram.
gnv-artifacts/trunk@688 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
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date | Mon, 15 Feb 2010 11:44:01 +0000 |
parents | a88e15972c72 |
children | 65f09139e9b3 |
rev | line source |
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1 package de.intevation.gnv.exports; |
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2 |
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3 import com.lowagie.text.Document; |
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4 import com.lowagie.text.DocumentException; |
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5 import com.lowagie.text.PageSize; |
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6 import com.lowagie.text.Rectangle; |
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7 import com.lowagie.text.pdf.PdfContentByte; |
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8 import com.lowagie.text.pdf.PdfTemplate; |
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9 import com.lowagie.text.pdf.PdfWriter; |
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10 |
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11 import java.awt.Transparency; |
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12 import java.awt.Graphics; |
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13 import java.awt.Graphics2D; |
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14 import java.awt.geom.Point2D; |
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15 import java.awt.geom.Rectangle2D; |
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16 import java.awt.geom.Rectangle2D.Double; |
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17 import java.awt.image.BufferedImage; |
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18 import java.io.OutputStream; |
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19 import java.io.OutputStreamWriter; |
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20 import java.io.IOException; |
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21 import java.io.UnsupportedEncodingException; |
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22 import javax.imageio.ImageIO; |
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23 |
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24 import org.apache.batik.svggen.SVGGraphics2D; |
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25 import org.apache.batik.svggen.SVGGraphics2DIOException; |
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26 import org.apache.log4j.Logger; |
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27 |
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28 import org.jfree.chart.JFreeChart; |
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29 |
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30 import de.intevation.artifactdatabase.XMLUtils; |
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31 import de.intevation.gnv.chart.Chart; |
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32 |
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33 |
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34 /** |
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35 * @author Ingo Weinzierl <ingo.weinzierl@intevation.de> |
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36 */ |
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37 public class ChartExportHelper { |
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38 |
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39 private static final String DEFAULT_PAGE_SIZE = "A4"; |
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40 private static final String DEFAULT_ENCODING = "UTF-8"; |
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41 |
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42 private static Logger log = Logger.getLogger(ChartExportHelper.class); |
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43 |
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44 public static void exportImage( |
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45 OutputStream out, |
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46 JFreeChart chart, |
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47 String format, |
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48 int width, |
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49 int height |
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50 ) |
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51 throws IOException |
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52 { |
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53 log.info("export chart as png"); |
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54 |
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55 ImageIO.write( |
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56 chart.createBufferedImage( |
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57 width, height, Transparency.BITMASK, null |
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58 ), |
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59 format, |
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60 out |
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61 ); |
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62 } |
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63 |
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64 |
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65 public static void exportHistograms( |
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66 OutputStream out, |
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67 Chart[] histograms, |
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68 String format, |
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69 int width, |
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70 int height) |
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71 throws IOException |
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72 { |
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73 log.info("export histograms"); |
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74 |
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75 int size = histograms.length; |
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76 BufferedImage image = new BufferedImage( |
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77 width, height*size, BufferedImage.TYPE_INT_RGB); |
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78 Graphics2D g = image.createGraphics(); |
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79 |
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80 for (int i = 0; i < size; i++) { |
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81 JFreeChart chart = histograms[i].generateChart(); |
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82 chart.draw(g, new Rectangle2D.Double(0.0D, i*height, width, height)); |
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83 } |
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84 g.finalize(); |
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85 |
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86 ImageIO.write(image, format, out); |
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87 } |
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88 |
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89 |
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90 public static void exportSVG( |
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91 OutputStream out, |
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92 JFreeChart chart, |
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93 String encoding, |
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94 int width, |
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95 int height |
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96 ) { |
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97 log.info("export chart as svg"); |
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98 |
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99 if (encoding == null) |
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100 encoding = DEFAULT_ENCODING; |
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101 |
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102 org.w3c.dom.Document document = XMLUtils.newDocument(); |
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103 SVGGraphics2D graphics = new SVGGraphics2D(document); |
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104 |
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105 chart.draw(graphics, new Rectangle2D.Double(0.0D, 0.0D,width,height)); |
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106 |
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107 try { |
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108 graphics.stream(new OutputStreamWriter(out, encoding)); |
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109 } |
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110 catch (SVGGraphics2DIOException svge) { |
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111 log.error("Error while writing svg export to output stream.", svge); |
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112 } |
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113 catch (UnsupportedEncodingException uee) { |
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114 log.error("Unsupported encoding: " + encoding, uee); |
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115 } |
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116 } |
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117 |
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118 |
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119 public static void exportPDF( |
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120 OutputStream out, |
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121 JFreeChart chart, |
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122 String pageFormat, |
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123 boolean landscape, |
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124 float marginLeft, |
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125 float marginRight, |
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126 float marginTop, |
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127 float marginBottom |
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128 ) { |
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129 log.info("export chart as pdf."); |
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130 |
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131 if (pageFormat == null) |
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132 pageFormat = DEFAULT_PAGE_SIZE; |
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133 |
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134 Rectangle page = PageSize.getRectangle(pageFormat); |
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135 int pageWidth = (int) (page.getRight(marginRight) - page.getLeft(marginLeft)); |
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136 int pageHeight = (int) (page.getTop(marginTop) - page.getBottom(marginBottom)); |
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137 |
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138 Document document = null; |
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139 if (landscape) { |
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140 document = new Document(page.rotate()); |
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141 log.debug("Create landscape pdf."); |
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142 } |
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143 else |
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144 document = new Document(page); |
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145 |
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146 try { |
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147 PdfWriter writer = PdfWriter.getInstance(document, out); |
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148 |
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149 document.addSubject(chart.getTitle().getText()); |
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150 document.addCreationDate(); |
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151 document.open(); |
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152 |
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153 PdfContentByte content = writer.getDirectContent(); |
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154 |
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155 int width = 0; |
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156 int height = 0; |
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157 if (landscape) { |
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158 width = pageHeight; |
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159 height = pageWidth; |
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160 } |
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161 else { |
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162 width = pageWidth; |
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163 height = pageHeight; |
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164 } |
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165 |
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166 PdfTemplate template = content.createTemplate(width, height); |
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167 Graphics2D graphics = template.createGraphics(width, height); |
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168 Rectangle2D area = new Rectangle2D.Double(0.0D, 0.0D,width,height); |
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169 |
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170 chart.draw(graphics, area); |
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171 graphics.dispose(); |
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172 content.addTemplate(template, marginLeft, marginBottom); |
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173 } |
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174 catch (DocumentException de) { |
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175 log.error("Error while exporting chart to pdf.", de); |
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176 } |
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177 finally { |
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178 document.close(); |
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179 } |
318
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180 } |
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181 } |
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182 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 : |