Mercurial > dive4elements > river
annotate artifacts/src/main/java/org/dive4elements/river/exports/ChartExportHelper.java @ 9123:1cc7653ca84f
Cleanup of ChartGenerator and ChartGenerator2 code. Put some of the copy/pasted code into a common abstraction.
author | gernotbelger |
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date | Tue, 05 Jun 2018 19:21:16 +0200 |
parents | 36c80c7fd02f |
children | 13a0c4be17ea |
rev | line source |
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde |
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2 * Software engineering by Intevation GmbH |
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3 * |
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4 * This file is Free Software under the GNU AGPL (>=v3) |
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the |
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6 * documentation coming with Dive4Elements River for details. |
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7 */ |
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8 |
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9 package org.dive4elements.river.exports; |
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10 |
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11 import com.lowagie.text.Document; |
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12 import com.lowagie.text.DocumentException; |
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13 import com.lowagie.text.ExceptionConverter; |
152
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14 import com.lowagie.text.PageSize; |
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15 import com.lowagie.text.Rectangle; |
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16 import com.lowagie.text.pdf.BaseFont; |
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17 import com.lowagie.text.pdf.DefaultFontMapper; |
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18 import com.lowagie.text.pdf.DefaultFontMapper.BaseFontParameters; |
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19 import com.lowagie.text.pdf.FontMapper; |
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20 import com.lowagie.text.pdf.PdfContentByte; |
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21 import com.lowagie.text.pdf.PdfTemplate; |
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22 import com.lowagie.text.pdf.PdfWriter; |
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23 |
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24 import java.awt.Font; |
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25 import java.awt.Graphics2D; |
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26 import java.awt.Transparency; |
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27 |
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28 import java.awt.geom.Rectangle2D; |
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29 import java.awt.image.BufferedImage; |
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30 import java.io.IOException; |
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31 import java.io.OutputStream; |
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32 import java.io.OutputStreamWriter; |
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33 import java.io.UnsupportedEncodingException; |
9106 | 34 import java.text.DateFormat; |
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35 import java.text.NumberFormat; |
9106 | 36 import java.util.Date; |
37 import java.util.Locale; | |
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38 import java.util.Map; |
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39 |
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40 import org.jfree.chart.ChartRenderingInfo; |
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41 |
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42 import javax.imageio.ImageIO; |
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43 |
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44 import au.com.bytecode.opencsv.CSVWriter; |
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45 |
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46 import org.apache.batik.svggen.SVGGraphics2D; |
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47 import org.apache.batik.svggen.SVGGraphics2DIOException; |
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48 |
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49 import org.apache.log4j.Logger; |
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50 |
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51 import org.jfree.chart.JFreeChart; |
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52 import org.jfree.chart.plot.XYPlot; |
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53 import org.jfree.data.xy.XYDataset; |
9106 | 54 import org.dive4elements.artifacts.Artifact; |
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55 import org.dive4elements.artifacts.CallContext; |
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56 |
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57 import org.dive4elements.artifacts.common.utils.XMLUtils; |
9106 | 58 import org.dive4elements.river.FLYS; |
59 import org.dive4elements.river.artifacts.resources.Resources; | |
60 import org.dive4elements.river.artifacts.sinfo.util.CalculationUtils; | |
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61 import org.dive4elements.river.jfree.XYMetaSeriesCollection; |
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62 import org.dive4elements.river.utils.Formatter; |
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63 |
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64 |
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65 /** |
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66 * This class is a helper class which supports some methods to export charts |
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67 * into specific formats. |
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68 * |
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69 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> |
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70 */ |
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71 public class ChartExportHelper { |
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72 |
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73 public static final String FORMAT_PNG = "png"; |
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74 |
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75 public static final String FORMAT_PDF = "pdf"; |
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76 |
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77 public static final String FORMAT_SVG = "svg"; |
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78 |
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79 public static final String FORMAT_CSV = "csv"; |
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80 |
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81 /** |
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82 * Constant field to define A4 as default page size. |
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83 */ |
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84 public static final String DEFAULT_PAGE_SIZE = "A4"; |
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85 |
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86 /** |
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87 * Constant field to define UTF-8 as default encoding. |
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88 */ |
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89 public static final String DEFAULT_ENCODING = "UTF-8"; |
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90 |
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91 /** The default separator for the CSV export. */ |
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92 public static final char DEFAULT_CSV_SEPARATOR = ';'; |
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93 |
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94 |
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95 /** |
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96 * Logger used for logging with log4j. |
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97 */ |
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98 private static Logger log = Logger.getLogger(ChartExportHelper.class); |
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99 |
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100 |
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101 /** |
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102 * A method to export a <code>JFreeChart</code> as image to an |
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103 * <code>OutputStream</code> with a given format, width and height. |
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104 * |
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105 * @param out OutputStream |
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106 * @param chart JFreeChart object to be exported. |
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107 * @param cc context, in which e.g. size is stored. |
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108 * |
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109 * @throws IOException if writing image to OutputStream failed. |
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110 */ |
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111 public static void exportImage( |
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112 OutputStream out, |
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113 JFreeChart chart, |
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114 CallContext cc |
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115 ) |
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116 throws IOException |
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117 { |
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118 log.info("export chart as png"); |
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119 |
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120 ChartRenderingInfo info = new ChartRenderingInfo(); |
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121 |
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122 String format = (String) cc.getContextValue("chart.image.format"); |
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123 |
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124 int[] size = getSize(cc); |
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125 |
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126 ImageIO.write( |
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127 chart.createBufferedImage( |
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128 size[0], size[1], Transparency.BITMASK, info |
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129 ), |
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130 format, |
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131 out |
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132 ); |
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133 } |
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134 |
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135 |
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136 /** |
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137 * A method to export a <code>JFreeChart</code> as SVG to an |
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138 * <code>OutputStream</code>. |
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139 * |
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140 * @param out OutputStream |
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141 * @param chart JFreeChart to be exported |
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142 * @param context The CallContext object that contains extra chart |
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143 * parameters. |
152
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144 */ |
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145 public static void exportSVG( |
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146 OutputStream out, |
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147 JFreeChart chart, |
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148 CallContext context |
152
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149 ) { |
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150 String encoding = (String) context.getContextValue("chart.encoding"); |
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151 |
152
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152 log.info("export chart as svg"); |
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153 |
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154 if (encoding == null) |
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155 encoding = DEFAULT_ENCODING; |
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156 |
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157 org.w3c.dom.Document document = XMLUtils.newDocument(); |
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158 SVGGraphics2D graphics = new SVGGraphics2D(document); |
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159 |
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160 int[] size = getSize(context); |
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161 |
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162 ChartRenderingInfo info = new ChartRenderingInfo(); |
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163 |
8856 | 164 chart.draw( |
165 graphics, | |
166 new Rectangle2D.Double(0.0D, 0.0D,size[0],size[1]), | |
167 info); | |
152
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168 |
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169 try { |
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170 graphics.stream(new OutputStreamWriter(out, encoding)); |
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171 } |
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172 catch (SVGGraphics2DIOException svge) { |
8856 | 173 log.error( |
174 "Error while writing svg export to output stream.", svge); | |
152
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175 } |
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176 catch (UnsupportedEncodingException uee) { |
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177 log.error("Unsupported encoding: " + encoding, uee); |
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178 } |
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179 } |
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180 |
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181 |
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182 /** |
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183 * A method to export a <code>JFreeChart</code> as PDF to an |
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184 * <code>OutputStream</code>. |
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185 * |
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186 * @param out OutputStream |
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187 * @param chart JFreeChart |
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188 */ |
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189 public static void exportPDF( |
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190 OutputStream out, |
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191 JFreeChart chart, |
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192 CallContext cc |
152
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193 ) { |
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194 log.info("export chart as pdf."); |
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195 |
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196 String pageFormat = (String) cc.getContextValue("chart.page.format"); |
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197 |
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198 if (pageFormat == null) |
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199 pageFormat = DEFAULT_PAGE_SIZE; |
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200 |
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201 // Max size of the chart. |
152
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202 Rectangle page = PageSize.getRectangle(pageFormat); |
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203 float pageWidth = page.getWidth(); |
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204 float pageHeight = page.getHeight(); |
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205 |
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206 // The chart width. |
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207 int[] size = getSize(cc); |
152
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208 |
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209 boolean landscape = size[0] > size[1]; |
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210 |
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211 float width = 0; |
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212 float height = 0; |
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213 if (landscape) { |
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214 width = pageHeight; |
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215 height = pageWidth; |
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216 } |
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217 else { |
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218 width = pageWidth; |
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219 height = pageHeight; |
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220 } |
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221 |
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222 float marginLeft = (Float) cc.getContextValue( |
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223 "chart.marginLeft"); |
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224 |
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225 float marginRight = (Float) cc.getContextValue( |
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226 "chart.marginRight"); |
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227 |
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228 float marginTop = (Float) cc.getContextValue( |
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229 "chart.marginTop"); |
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230 |
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231 float marginBottom = (Float) cc.getContextValue( |
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232 "chart.marginBottom"); |
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233 |
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234 float spaceX = width - marginLeft - marginRight; |
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235 if (size[0] > spaceX) { |
8856 | 236 log.warn( |
237 "Width of the chart is too big for pdf -> resize it now."); | |
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238 double ratio = ((double)spaceX) / size[0]; |
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239 size[0] *= ratio; |
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240 size[1] *= ratio; |
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241 log.debug("Resized chart to " + size[0] + "x" + size[1]); |
152
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242 } |
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243 |
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244 float spaceY = height - marginTop - marginBottom; |
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245 if (size[1] > spaceY) { |
8856 | 246 log.warn( |
247 "Height of the chart is too big for pdf -> resize it now."); | |
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248 double ratio = ((double)spaceY) / size[1]; |
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249 size[0] *= ratio; |
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250 size[1] *= ratio; |
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251 log.debug("Resized chart to " + size[0] + "x" + size[1]); |
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252 } |
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253 |
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254 Document document = null; |
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255 if (landscape) { |
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256 document = new Document(page.rotate()); |
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257 log.debug("Create landscape pdf."); |
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258 } else { |
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259 document = new Document(page); |
152
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260 } |
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261 |
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262 try { |
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263 PdfWriter writer = PdfWriter.getInstance(document, out); |
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264 |
8856 | 265 document.addSubject( |
266 chart.getTitle() != null ? chart.getTitle().getText() : ""); | |
152
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267 document.addCreationDate(); |
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268 document.open(); |
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269 |
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270 try { |
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271 PdfContentByte content = writer.getDirectContent(); |
152
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272 |
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273 PdfTemplate template = content.createTemplate(width, height); |
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274 |
9119 | 275 final FontMapper mapper = new ChartExportFontMapper(); |
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276 |
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277 final Graphics2D graphics = template.createGraphics(width, height ); |
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278 |
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279 double[] origin = getCenteredAnchor( |
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280 marginLeft, marginRight, marginBottom, marginTop, |
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281 width, height, |
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282 size[0], size[1]); |
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283 |
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284 Rectangle2D area = new Rectangle2D.Double( |
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285 origin[0], origin[1], size[0], size[1]); |
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286 |
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287 ChartRenderingInfo info = new ChartRenderingInfo(); |
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288 chart.draw(graphics, area, info); |
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289 |
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290 graphics.dispose(); |
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291 content.addTemplate(template, 0f, 0f); |
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292 |
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293 } |
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294 finally { |
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295 document.close(); |
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296 } |
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297 } catch (DocumentException de) { |
152
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298 log.error("Error while exporting chart to pdf.", de); |
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299 } |
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300 } |
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301 |
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302 |
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303 /** |
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304 * A method to export a CSV file to an |
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305 * <code>OutputStream</code>. |
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306 * |
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307 * @param out OutputStream |
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308 * @param chart JFreeChart containing the data. |
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309 * @param context The CallContext object that contains extra parameters. |
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310 */ |
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311 public static void exportCSV( |
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312 OutputStream out, |
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313 JFreeChart chart, |
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314 CallContext context) |
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315 { |
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316 log.debug("export chart as CSV"); |
9106 | 317 |
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318 try { |
9106 | 319 // FIXME: decide: to BOM or not to BOM |
320 // final byte[] BOM = new byte[] {(byte)0xEF, (byte)0xBB, (byte)0xBF}; | |
321 // out.write(BOM); | |
322 | |
323 final CSVWriter writer = new CSVWriter( | |
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324 new OutputStreamWriter( |
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325 out, |
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326 DEFAULT_ENCODING), |
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327 DEFAULT_CSV_SEPARATOR, '"', '\\', "\r\n"); |
9106 | 328 |
329 NumberFormat format = Formatter.getCSVFormatter(context); | |
330 | |
331 XYPlot plot = chart.getXYPlot(); | |
332 int count = plot.getDatasetCount(); | |
333 for (int i = 0; i < count; i++) { | |
334 XYDataset data = plot.getDataset(i); | |
335 int scount = data.getSeriesCount(); | |
336 for (int j = 0; j < scount; j++) { | |
337 Comparable seriesKey = data.getSeriesKey(j); | |
338 log.debug("series key: " + seriesKey.toString()); | |
339 Map<String, String> metaData = null; | |
340 if (data instanceof XYMetaSeriesCollection) { | |
341 metaData = ((XYMetaSeriesCollection) data).getMetaData(); | |
342 } | |
343 writeCSVHeader(writer, seriesKey.toString(), metaData); | |
344 writeCSVData(writer, data, format); | |
345 } | |
346 } | |
347 writer.close(); | |
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348 } |
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349 catch(UnsupportedEncodingException uee) { |
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350 log.warn("Wrong encoding for CSV export."); |
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351 return; |
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352 } |
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353 catch(IOException ioe) { |
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354 log.error("Writing CSV export failed!"); |
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355 } |
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356 } |
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357 |
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358 |
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359 protected static void writeCSVHeader( |
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360 CSVWriter writer, |
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361 String key, |
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362 Map<String, String> metaData) |
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363 { |
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364 writer.writeNext(new String[] {"#"}); |
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365 if (metaData != null) { |
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366 writer.writeNext(new String[] {"# " + key}); |
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367 for (Map.Entry<String, String> entry: metaData.entrySet()) { |
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368 if (entry.getKey().equals("X") || entry.getKey().equals("Y")) { |
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369 continue; |
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370 } |
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371 writer.writeNext(new String[] |
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372 {"# " + entry.getKey() + ": " + entry.getValue()}); |
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373 } |
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374 writer.writeNext(new String[] {"#"}); |
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375 writer.writeNext(new String[] { |
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376 metaData.get("X") != null ? metaData.get("X") : "X", |
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377 metaData.get("Y") != null ? metaData.get("Y") : "Y"}); |
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378 } |
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379 else { |
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380 writer.writeNext(new String[] {"# " + key}); |
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381 writer.writeNext(new String[] {"#"}); |
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382 writer.writeNext(new String[] {"X", "Y"}); |
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383 } |
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384 } |
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385 |
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386 |
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387 /** Get x/y data from axis set and write it, on pair per line. */ |
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388 protected static void writeCSVData( |
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389 CSVWriter writer, XYDataset data, NumberFormat format) { |
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390 int series = data.getSeriesCount(); |
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391 for (int i = 0; i < series; i++) { |
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392 int items = data.getItemCount(i); |
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393 double lastX = java.lang.Double.MAX_VALUE; |
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394 double lastY = java.lang.Double.MAX_VALUE; |
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395 |
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396 for (int j = 0; j < items; j++) { |
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397 Number x = data.getX(i, j); |
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398 Number y = data.getY(i, j); |
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399 double xVal = data.getXValue(i, j); |
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400 double yVal = data.getYValue(i, j); |
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401 |
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402 if (lastX == xVal && lastY == yVal) { |
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403 // comparing equality is ok here as we want |
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404 // to find data duplicates like they are added |
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405 // for example by the StyledSeriesBuilder in |
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406 // addStepPointsKmQ |
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407 log.debug("removing duplicate point in series"); |
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408 continue; |
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409 } |
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410 lastX = xVal; |
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411 lastY = yVal; |
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412 |
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413 String xString; |
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414 String yString; |
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415 |
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416 try { |
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417 xString = java.lang.Double.isNaN(xVal) |
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418 ? "" |
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419 : format.format(x); |
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420 yString = java.lang.Double.isNaN(yVal) |
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421 ? "" |
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422 : format.format(y); |
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423 } |
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424 catch (NumberFormatException nfe) { |
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425 xString = x.toString(); |
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426 yString = y.toString(); |
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427 } |
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428 writer.writeNext(new String[] { |
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429 xString, |
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430 yString}); |
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431 } |
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432 } |
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433 } |
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434 |
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435 |
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436 public static int[] getSize(CallContext cc) { |
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437 int[] size = new int[2]; |
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438 |
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439 size[0] = (Integer) cc.getContextValue("chart.width"); |
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440 size[1] = (Integer) cc.getContextValue("chart.height"); |
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441 |
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442 return size; |
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443 } |
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444 |
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445 |
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446 /** |
8856 | 447 * Returns the anchor of the chart so that the chart is centered |
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448 * according to the given parameters. |
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449 * |
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450 * @param mLeft Left margin |
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451 * @param mRight Right margin |
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452 * @param mBottom Bottom margin |
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453 * @param mTop Top margin |
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454 * @param width The complete width of the drawing area. |
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455 * @param height The complete height of the drawing area. |
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456 * @param chartWidth The width of the chart. |
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457 * @param chartHeight The height of the chart. |
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458 * |
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459 * @return an array that contains the anchor for a chart with the given |
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460 * parameters. The first value is the x point, the second value is the y |
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461 * point. |
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462 */ |
9106 | 463 private static double[] getCenteredAnchor( |
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464 double mLeft, double mRight, double mBottom, double mTop, |
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465 double width, double height, |
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466 double chartWidth, double chartHeight |
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467 ) { |
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468 if (log.isDebugEnabled()) { |
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469 log.debug("Calculate centered origin..."); |
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470 log.debug("-> PDF width : " + width); |
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471 log.debug("-> PDF height : " + height); |
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472 log.debug("-> Chart width : " + chartWidth); |
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473 log.debug("-> Chart height : " + chartHeight); |
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474 log.debug("-> margin left : " + mLeft); |
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475 log.debug("-> margin right : " + mRight); |
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476 log.debug("-> margin bottom: " + mBottom); |
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477 log.debug("-> margin top : " + mTop); |
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478 } |
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479 |
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480 double[] origin = new double[2]; |
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481 |
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482 double centerX = width / 2; |
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483 double centerY = height / 2; |
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484 |
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485 origin[0] = centerX - chartWidth / 2; |
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486 origin[1] = centerY - chartHeight / 2; |
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487 |
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488 origin[0] = origin[0] >= mLeft ? origin[0] : mLeft; |
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489 origin[1] = origin[1] >= mTop ? origin[1] : mTop; |
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490 |
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491 if (log.isDebugEnabled()) { |
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492 log.debug("==> centered left origin: " + origin[0]); |
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493 log.debug("==> centered top origin: " + origin[1]); |
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494 } |
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495 |
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496 return origin; |
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497 } |
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498 } |