Mercurial > dive4elements > river
annotate artifacts/src/main/java/org/dive4elements/river/artifacts/services/BedloadKMChartService.java @ 8566:fe7e9da6312a
(issue1797) Move close into session release and guard it.
To avoid leaking open and Held sessions we centrally close
the session in the SessionHolder on release.
This also removes some duplicated code in SedDBSessionHolder
author | Andre Heinecke <andre.heinecke@intevation.de> |
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date | Tue, 24 Feb 2015 17:16:14 +0100 |
parents | af13ceeba52a |
children | 5e38e2924c07 |
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.artifacts.services; |
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10 |
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11 import java.awt.Color; |
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12 import java.awt.Dimension; |
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13 import java.awt.Transparency; |
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14 import java.awt.image.BufferedImage; |
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15 import java.io.ByteArrayOutputStream; |
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16 import java.io.IOException; |
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17 import java.util.Date; |
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18 import java.util.List; |
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19 |
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20 import javax.imageio.ImageIO; |
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21 |
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22 import org.apache.log4j.Logger; |
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23 import org.jfree.chart.ChartFactory; |
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24 import org.jfree.chart.JFreeChart; |
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25 import org.jfree.chart.axis.DateAxis; |
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26 import org.jfree.chart.plot.PlotOrientation; |
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27 import org.jfree.chart.plot.XYPlot; |
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28 import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer; |
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29 import org.jfree.data.xy.XYSeries; |
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30 import org.jfree.data.xy.XYSeriesCollection; |
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31 import org.w3c.dom.Document; |
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32 import org.w3c.dom.Element; |
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33 import org.w3c.dom.NodeList; |
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34 |
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35 import org.dive4elements.artifactdatabase.DefaultService; |
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36 import org.dive4elements.artifacts.CallMeta; |
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37 import org.dive4elements.artifacts.GlobalContext; |
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38 import org.dive4elements.artifacts.Service; |
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39 import org.dive4elements.river.artifacts.model.minfo.BedloadOverview; |
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40 import org.dive4elements.river.artifacts.model.minfo.BedloadOverviewFactory; |
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41 import org.dive4elements.river.artifacts.resources.Resources; |
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42 import org.dive4elements.river.backend.SedDBSessionHolder; |
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43 import org.dive4elements.river.utils.KMIndex; |
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44 |
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45 public class BedloadKMChartService extends DefaultService { |
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46 |
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47 private static final long serialVersionUID = 4156704841305086495L; |
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48 |
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49 private static final Logger log = |
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50 Logger.getLogger(BedloadKMChartService.class); |
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51 |
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52 public static final int DEFAULT_WIDTH = 240; |
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53 public static final int DEFAULT_HEIGHT = 180; |
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54 |
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55 public static final String I18N_CHART_LABEL = |
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56 "bedload.km.chart.label"; |
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57 |
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58 public static final String DEFAULT_CHART_LABEL = |
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59 "Measuring Points"; |
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60 |
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61 public static final String I18N_CHART_TITLE = |
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62 "bedload.km.chart.title"; |
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63 |
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64 public static final String DEFAULT_CHART_TITLE = |
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65 "Measuring points"; |
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66 |
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67 public static final String I18N_KM_AXIS = |
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68 "bedload.km.chart.km.axis"; |
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69 |
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70 public static final String DEFAULT_KM_AXIS = |
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71 "km"; |
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72 |
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73 public static final String I18N_DATE_AXIS = |
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74 "bedload.km.chart.date.axis"; |
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75 |
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76 public static final String DEFAULT_DATE_AXIS = |
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77 "Date"; |
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78 |
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79 public static final String DEFAULT_FORMAT = "png"; |
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80 |
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81 // TODO: Load fancy image from resources. |
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82 public static final byte [] EMPTY = { |
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83 (byte)0x89, (byte)0x50, (byte)0x4e, (byte)0x47, |
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84 (byte)0x0d, (byte)0x0a, (byte)0x1a, (byte)0x0a, |
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85 (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x0d, |
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86 (byte)0x49, (byte)0x48, (byte)0x44, (byte)0x52, |
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87 (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x01, |
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88 (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x01, |
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89 (byte)0x08, (byte)0x00, (byte)0x00, (byte)0x00, |
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91 (byte)0x55, (byte)0x00, (byte)0x00, (byte)0x00, |
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92 (byte)0x01, (byte)0x73, (byte)0x52, (byte)0x47, |
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93 (byte)0x42, (byte)0x00, (byte)0xae, (byte)0xce, |
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94 (byte)0x1c, (byte)0xe9, (byte)0x00, (byte)0x00, |
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95 (byte)0x00, (byte)0x09, (byte)0x70, (byte)0x48, |
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96 (byte)0x59, (byte)0x73, (byte)0x00, (byte)0x00, |
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97 (byte)0x0b, (byte)0x13, (byte)0x00, (byte)0x00, |
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99 (byte)0x9a, (byte)0x9c, (byte)0x18, (byte)0x00, |
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100 (byte)0x00, (byte)0x00, (byte)0x07, (byte)0x74, |
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101 (byte)0x49, (byte)0x4d, (byte)0x45, (byte)0x07, |
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102 (byte)0xdc, (byte)0x04, (byte)0x04, (byte)0x10, |
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103 (byte)0x30, (byte)0x15, (byte)0x7d, (byte)0x77, |
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104 (byte)0x36, (byte)0x0b, (byte)0x00, (byte)0x00, |
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106 (byte)0x58, (byte)0x74, (byte)0x43, (byte)0x6f, |
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107 (byte)0x6d, (byte)0x6d, (byte)0x65, (byte)0x6e, |
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108 (byte)0x74, (byte)0x00, (byte)0xf6, (byte)0xcc, |
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109 (byte)0x96, (byte)0xbf, (byte)0x00, (byte)0x00, |
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110 (byte)0x00, (byte)0x0a, (byte)0x49, (byte)0x44, |
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111 (byte)0x41, (byte)0x54, (byte)0x08, (byte)0xd7, |
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112 (byte)0x63, (byte)0xf8, (byte)0x0f, (byte)0x00, |
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113 (byte)0x01, (byte)0x01, (byte)0x01, (byte)0x00, |
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114 (byte)0x1b, (byte)0xb6, (byte)0xee, (byte)0x56, |
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115 (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, |
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116 (byte)0x49, (byte)0x45, (byte)0x4e, (byte)0x44, |
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117 (byte)0xae, (byte)0x42, (byte)0x60, (byte)0x82 |
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118 }; |
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119 |
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120 private static final Output empty() { |
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121 return new Output(EMPTY, "image/png"); |
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122 } |
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123 |
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124 @Override |
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125 public Service.Output process( |
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126 Document data, |
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127 GlobalContext globalContext, |
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128 CallMeta callMeta |
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129 ) { |
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130 log.debug("SQKMChartService.process"); |
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131 |
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132 SedDBSessionHolder.acquire(); |
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133 try { |
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134 return doProcess(data, globalContext, callMeta); |
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135 } |
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136 finally { |
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137 SedDBSessionHolder.release(); |
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138 } |
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139 } |
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140 |
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141 protected Service.Output doProcess( |
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142 Document input, |
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143 GlobalContext globalContext, |
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144 CallMeta callMeta |
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145 ) { |
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146 String river = getRiverName(input); |
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147 Dimension extent = getExtent(input); |
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148 String format = getFormat(input); |
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149 |
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150 if (river == null) { |
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151 log.warn("River invalid."); |
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152 return empty(); |
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153 } |
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154 |
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155 BedloadOverview overview = BedloadOverviewFactory.getOverview(river); |
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156 |
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157 if (overview == null) { |
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158 log.warn("No overview found for river '" + river + "'"); |
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159 return empty(); |
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160 } |
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161 |
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162 KMIndex<List<Date>> entries = overview.filter(BedloadOverview.ACCEPT); |
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163 |
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164 JFreeChart chart = createChart(entries, river, callMeta); |
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165 |
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166 return encode(chart, extent, format); |
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167 } |
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168 |
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169 protected static Output encode( |
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170 JFreeChart chart, |
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171 Dimension extent, |
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172 String format |
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173 ) { |
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174 BufferedImage image = chart.createBufferedImage( |
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175 extent.width, extent.height, |
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176 Transparency.BITMASK, |
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177 null); |
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178 |
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179 ByteArrayOutputStream out = new ByteArrayOutputStream(); |
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180 |
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181 try { |
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182 ImageIO.write(image, format, out); |
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183 } |
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184 catch (IOException ioe) { |
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185 log.warn("writing image failed", ioe); |
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186 return empty(); |
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187 } |
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188 |
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189 return new Output(out.toByteArray(), "image/" + format); |
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190 } |
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191 |
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192 protected static JFreeChart createChart( |
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193 KMIndex<List<Date>> entries, |
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194 String river, |
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195 CallMeta callMeta |
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196 ) { |
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197 |
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198 XYSeriesCollection dataset = new XYSeriesCollection(); |
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199 String key = Resources.format( |
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200 callMeta, I18N_CHART_LABEL, DEFAULT_CHART_LABEL, river); |
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201 |
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202 XYSeries series = new XYSeries(key); |
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203 for (KMIndex.Entry<List<Date>> e: entries) { |
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204 double km = e.getKm(); |
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205 List<Date> ds = e.getValue(); |
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206 for (Date d: ds) { |
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207 series.add(km, d.getTime()); |
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208 } |
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209 } |
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210 |
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211 dataset.addSeries(series); |
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212 String title = Resources.format( |
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213 callMeta, I18N_CHART_TITLE, DEFAULT_CHART_TITLE, river); |
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214 |
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215 String kmAxis = Resources.getMsg( |
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216 callMeta, I18N_KM_AXIS, DEFAULT_KM_AXIS); |
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217 |
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218 String dateAxis = Resources.getMsg( |
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219 callMeta, I18N_DATE_AXIS, DEFAULT_DATE_AXIS); |
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220 |
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221 JFreeChart chart = ChartFactory.createXYLineChart( |
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222 title, |
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223 kmAxis, |
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224 dateAxis, |
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225 null, |
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226 PlotOrientation.VERTICAL, |
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227 true, |
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228 true, |
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229 false); |
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230 |
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231 XYPlot plot = (XYPlot)chart.getPlot(); |
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232 |
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233 DateAxis dA = new DateAxis(); |
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234 plot.setRangeAxis(dA); |
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235 plot.setDataset(0, dataset); |
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236 |
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237 chart.setBackgroundPaint(Color.white); |
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238 plot.setBackgroundPaint(Color.white); |
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239 plot.setDomainGridlinePaint(Color.gray); |
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240 plot.setRangeGridlinePaint(Color.gray); |
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241 plot.setDomainGridlinesVisible(true); |
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242 plot.setRangeGridlinesVisible(true); |
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243 XYLineAndShapeRenderer renderer = (XYLineAndShapeRenderer) plot.getRenderer(); |
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244 |
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245 renderer.setSeriesPaint(0, Color.gray); |
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246 renderer.setSeriesLinesVisible(0, false); |
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247 renderer.setSeriesShapesVisible(0, true); |
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248 renderer.setDrawOutlines(true); |
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249 return chart; |
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250 } |
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251 |
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252 |
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253 protected static String getRiverName(Document input) { |
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254 NodeList rivers = input.getElementsByTagName("river"); |
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255 |
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256 if (rivers.getLength() == 0) { |
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257 return null; |
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258 } |
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259 |
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260 String river = ((Element)rivers.item(0)).getAttribute("name"); |
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261 |
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262 return river.length() > 0 ? river : null; |
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263 } |
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264 |
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265 protected static Dimension getExtent(Document input) { |
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266 |
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267 int width = DEFAULT_WIDTH; |
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268 int height = DEFAULT_HEIGHT; |
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269 |
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270 NodeList extents = input.getElementsByTagName("extent"); |
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271 |
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272 if (extents.getLength() > 0) { |
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273 Element element = (Element)extents.item(0); |
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274 String w = element.getAttribute("width"); |
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275 String h = element.getAttribute("height"); |
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276 |
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277 try { |
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278 width = Math.max(1, Integer.parseInt(w)); |
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279 } |
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280 catch (NumberFormatException nfe) { |
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281 log.warn("width '" + w + "' is not a valid."); |
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282 } |
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283 |
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284 try { |
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285 height = Math.max(1, Integer.parseInt(h)); |
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286 } |
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287 catch (NumberFormatException nfe) { |
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288 log.warn("height '" + h + "' is not a valid"); |
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289 } |
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290 } |
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291 |
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292 return new Dimension(width, height); |
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293 } |
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294 |
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295 protected static String getFormat(Document input) { |
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296 String format = DEFAULT_FORMAT; |
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297 |
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298 NodeList formats = input.getElementsByTagName("format"); |
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299 |
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300 if (formats.getLength() > 0) { |
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301 String type = ((Element)formats.item(0)).getAttribute("type"); |
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302 if (type.length() > 0) { |
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303 format = type; |
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304 } |
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305 } |
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306 |
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307 return format; |
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308 } |
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309 } |