Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/services/FixingsKMChartService.java @ 3061:49baebb39305

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FixA: Add interpolation of parameters that better suits the instantiation real functions. flys-artifacts/trunk@4641 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Tue, 12 Jun 2012 08:11:36 +0000
parents f0cc556eda29
children 5642a83420f2
rev   line source
2614
036e234c2385 Added service to generate a chart of fixings for given river and km applied
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1 package de.intevation.flys.artifacts.services;
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2
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3 import de.intevation.artifactdatabase.DefaultService;
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4
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5 import de.intevation.artifacts.CallMeta;
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6 import de.intevation.artifacts.GlobalContext;
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7 import de.intevation.artifacts.Service;
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8
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9 import de.intevation.flys.artifacts.model.FixingsColumn;
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10 import de.intevation.flys.artifacts.model.FixingsColumnFactory;
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11 import de.intevation.flys.artifacts.model.FixingsFilterBuilder;
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12
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13 import de.intevation.flys.artifacts.model.FixingsOverview.Fixing;
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14
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15 import de.intevation.flys.artifacts.model.FixingsOverview;
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16 import de.intevation.flys.artifacts.model.FixingsOverviewFactory;
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17
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18 import de.intevation.flys.backend.SessionHolder;
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19
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20 import de.intevation.flys.utils.Pair;
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21
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22 import gnu.trove.TDoubleArrayList;
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23
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24 import java.awt.Dimension;
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25 import java.awt.Transparency;
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26
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27 import java.awt.image.BufferedImage;
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28
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29 import java.io.ByteArrayOutputStream;
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30 import java.io.IOException;
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31
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32 import java.util.ArrayList;
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33 import java.util.List;
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34
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35 import javax.imageio.ImageIO;
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36
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37 import org.apache.log4j.Logger;
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38
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39 import org.jfree.chart.ChartFactory;
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40 import org.jfree.chart.ChartUtilities;
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41 import org.jfree.chart.JFreeChart;
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42
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43 import org.jfree.chart.plot.PlotOrientation;
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44 import org.jfree.chart.plot.XYPlot;
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45
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46 import org.jfree.data.xy.DefaultXYDataset;
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47
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48 import org.w3c.dom.Document;
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49 import org.w3c.dom.Element;
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50 import org.w3c.dom.NodeList;
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51
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52 public class FixingsKMChartService
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53 extends DefaultService
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54 {
036e234c2385 Added service to generate a chart of fixings for given river and km applied
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55 private static final Logger log =
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56 Logger.getLogger(FixingsKMChartService.class);
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57
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58 public static final int DEFAULT_WIDTH = 240;
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59 public static final int DEFAULT_HEIGHT = 180;
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60
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61 public static final String DEFAULT_FORMAT = "png";
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62
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63 // TODO: Load fancy image from resources.
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64 public static final byte [] EMPTY = {
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65 (byte)0x89, (byte)0x50, (byte)0x4e, (byte)0x47,
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66 (byte)0x0d, (byte)0x0a, (byte)0x1a, (byte)0x0a,
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67 (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x0d,
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68 (byte)0x49, (byte)0x48, (byte)0x44, (byte)0x52,
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69 (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x01,
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70 (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x01,
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71 (byte)0x08, (byte)0x00, (byte)0x00, (byte)0x00,
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72 (byte)0x00, (byte)0x3a, (byte)0x7e, (byte)0x9b,
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73 (byte)0x55, (byte)0x00, (byte)0x00, (byte)0x00,
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74 (byte)0x01, (byte)0x73, (byte)0x52, (byte)0x47,
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75 (byte)0x42, (byte)0x00, (byte)0xae, (byte)0xce,
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76 (byte)0x1c, (byte)0xe9, (byte)0x00, (byte)0x00,
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77 (byte)0x00, (byte)0x09, (byte)0x70, (byte)0x48,
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78 (byte)0x59, (byte)0x73, (byte)0x00, (byte)0x00,
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79 (byte)0x0b, (byte)0x13, (byte)0x00, (byte)0x00,
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80 (byte)0x0b, (byte)0x13, (byte)0x01, (byte)0x00,
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81 (byte)0x9a, (byte)0x9c, (byte)0x18, (byte)0x00,
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82 (byte)0x00, (byte)0x00, (byte)0x07, (byte)0x74,
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83 (byte)0x49, (byte)0x4d, (byte)0x45, (byte)0x07,
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84 (byte)0xdc, (byte)0x04, (byte)0x04, (byte)0x10,
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85 (byte)0x30, (byte)0x15, (byte)0x7d, (byte)0x77,
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86 (byte)0x36, (byte)0x0b, (byte)0x00, (byte)0x00,
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87 (byte)0x00, (byte)0x08, (byte)0x74, (byte)0x45,
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88 (byte)0x58, (byte)0x74, (byte)0x43, (byte)0x6f,
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89 (byte)0x6d, (byte)0x6d, (byte)0x65, (byte)0x6e,
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90 (byte)0x74, (byte)0x00, (byte)0xf6, (byte)0xcc,
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91 (byte)0x96, (byte)0xbf, (byte)0x00, (byte)0x00,
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92 (byte)0x00, (byte)0x0a, (byte)0x49, (byte)0x44,
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93 (byte)0x41, (byte)0x54, (byte)0x08, (byte)0xd7,
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94 (byte)0x63, (byte)0xf8, (byte)0x0f, (byte)0x00,
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95 (byte)0x01, (byte)0x01, (byte)0x01, (byte)0x00,
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96 (byte)0x1b, (byte)0xb6, (byte)0xee, (byte)0x56,
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97 (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00,
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98 (byte)0x49, (byte)0x45, (byte)0x4e, (byte)0x44,
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99 (byte)0xae, (byte)0x42, (byte)0x60, (byte)0x82
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100 };
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101
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102 private static final Output empty() {
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103 return new Output(EMPTY, "image/png");
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104 }
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105
036e234c2385 Added service to generate a chart of fixings for given river and km applied
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106 @Override
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107 public Service.Output process(
036e234c2385 Added service to generate a chart of fixings for given river and km applied
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108 Document data,
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109 GlobalContext globalContext,
036e234c2385 Added service to generate a chart of fixings for given river and km applied
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110 CallMeta callMeta
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parents:
diff changeset
111 ) {
036e234c2385 Added service to generate a chart of fixings for given river and km applied
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112 log.debug("FixingsKMChartService.process");
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113
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114 SessionHolder.acquire();
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115 try {
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116 return doProcess(data, globalContext, callMeta);
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117 }
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118 finally {
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119 SessionHolder.HOLDER.get().close();
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120 SessionHolder.release();
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121 }
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122 }
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123
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124 protected Service.Output doProcess(
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125 Document input,
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126 GlobalContext globalContext,
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127 CallMeta callMeta
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128 ) {
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129 String river = getRiverName(input);
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130 Double km = getKM(input);
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131 Dimension extent = getExtent(input);
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132 String format = getFormat(input);
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133
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134 if (river == null || km == null) {
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135 log.warn("River and/or km invalid.");
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136 return empty();
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137 }
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138
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139 FixingsOverview overview = FixingsOverviewFactory.getOverview(river);
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140
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141 if (overview == null) {
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142 log.warn("No overview found for river '" + river + "'");
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143 return empty();
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144 }
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145
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146 FixingsFilterBuilder ffb = new FixingsFilterBuilder(input);
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147
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148 List<Fixing.Column> columns = overview.filter(
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149 ffb.getRange(),
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diff changeset
150 ffb.getFilter());
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151
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152 List<Pair<Fixing.Column, FixingsColumn>> cols =
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153 new ArrayList<Pair<Fixing.Column, FixingsColumn>>();
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154
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155 for (Fixing.Column col: columns) {
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156 FixingsColumn data =
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157 FixingsColumnFactory.INSTANCE.getColumnData(col);
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diff changeset
158 if (data != null) {
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parents: 2615
diff changeset
159 cols.add(new Pair<Fixing.Column, FixingsColumn>(col, data));
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160 }
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parents: 2614
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161 }
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162
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163 JFreeChart chart = createChart(cols, river, km);
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parents: 2615
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164
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165 return encode(chart, extent, format);
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166 }
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167
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168 protected static Output encode(
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169 JFreeChart chart,
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diff changeset
170 Dimension extent,
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parents: 2615
diff changeset
171 String format
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172 ) {
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diff changeset
173 BufferedImage image = chart.createBufferedImage(
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parents: 2615
diff changeset
174 extent.width, extent.height,
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parents: 2615
diff changeset
175 Transparency.BITMASK,
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parents: 2615
diff changeset
176 null);
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diff changeset
177
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diff changeset
178 ByteArrayOutputStream out = new ByteArrayOutputStream();
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179
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parents: 2615
diff changeset
180 try {
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parents: 2615
diff changeset
181 ImageIO.write(image, format, out);
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parents: 2615
diff changeset
182 }
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parents: 2615
diff changeset
183 catch (IOException ioe) {
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parents: 2615
diff changeset
184 log.warn("writing image failed", ioe);
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parents: 2615
diff changeset
185 return empty();
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parents: 2615
diff changeset
186 }
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parents: 2615
diff changeset
187
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diff changeset
188 return new Output(out.toByteArray(), "image/" + format);
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parents: 2615
diff changeset
189 }
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diff changeset
190
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diff changeset
191 protected static JFreeChart createChart(
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diff changeset
192 List<Pair<Fixing.Column, FixingsColumn>> cols,
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diff changeset
193 String river,
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parents: 2615
diff changeset
194 double km
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diff changeset
195 ) {
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parents: 2615
diff changeset
196
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diff changeset
197 TDoubleArrayList ws = new TDoubleArrayList(cols.size());
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diff changeset
198 TDoubleArrayList qs = new TDoubleArrayList(cols.size());
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199
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diff changeset
200 double [] w = new double[1];
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diff changeset
201 for (Pair<Fixing.Column, FixingsColumn> col: cols) {
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parents: 2615
diff changeset
202 boolean interpolated = col.getB().getW(km, w);
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diff changeset
203 // TODO: Do something special with the interpolated values.
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parents: 2615
diff changeset
204 double q = col.getB().getQ(km);
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parents: 2615
diff changeset
205 if (!Double.isNaN(w[0]) && !Double.isNaN(q)) {
cc0fa1798a3c FixingsKMChartService: Generate chart and deliver the image as the response of the service.
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parents: 2615
diff changeset
206 ws.add(w[0]);
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parents: 2615
diff changeset
207 qs.add(q);
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parents: 2615
diff changeset
208 // TODO: Generate labels depending on sectors.
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parents: 2615
diff changeset
209 }
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parents: 2615
diff changeset
210 }
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diff changeset
211
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diff changeset
212 DefaultXYDataset dataset = new DefaultXYDataset();
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diff changeset
213
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parents: 2615
diff changeset
214 dataset.addSeries(
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parents: 2615
diff changeset
215 "Fixierungen", // TODO: i18n
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parents: 2620
diff changeset
216 new double [][] { qs.toNativeArray(), ws.toNativeArray() });
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diff changeset
217
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diff changeset
218 JFreeChart chart = ChartFactory.createScatterPlot(
2620
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diff changeset
219 "Fixierungen " + river + ": km " + km, // TODO: i18n
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parents: 2615
diff changeset
220 "Q", // TODO: i18n
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diff changeset
221 "W", // TODO: i18n
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222 dataset,
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223 PlotOrientation.VERTICAL,
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224 true,
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225 false,
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226 false);
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227
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228 //XYPlot plot = chart.getXYPlot();
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229
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230 //plot.setDataset(dataset);
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231
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232 ChartUtilities.applyCurrentTheme(chart);
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233
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234 return chart;
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235 }
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236
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237 protected static String getRiverName(Document input) {
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238 NodeList rivers = input.getElementsByTagName("river");
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239
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240 if (rivers.getLength() == 0) {
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241 return null;
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242 }
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243
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244 String river = ((Element)rivers.item(0)).getAttribute("name");
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245
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246 return river.length() > 0 ? river : null;
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247 }
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248
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249 protected static Double getKM(Document input) {
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250 NodeList kms = input.getElementsByTagName("km");
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251
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252 if (kms.getLength() == 0) {
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253 return null;
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254 }
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255
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256 String km = ((Element)kms.item(0)).getAttribute("value");
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257
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258 try {
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259 return Double.valueOf(km);
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260 }
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261 catch (NumberFormatException nfe) {
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262 log.warn("Km '" + km + " is not a valid number.");
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263 return null;
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264 }
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265 }
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266
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267 protected static Dimension getExtent(Document input) {
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268
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269 int width = DEFAULT_WIDTH;
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270 int height = DEFAULT_HEIGHT;
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271
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272 NodeList extents = input.getElementsByTagName("extent");
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273
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274 if (extents.getLength() > 0) {
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275 Element element = (Element)extents.item(0);
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276 String w = element.getAttribute("width");
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277 String h = element.getAttribute("height");
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278
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279 try {
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280 width = Math.max(1, Integer.parseInt(w));
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281 }
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282 catch (NumberFormatException nfe) {
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283 log.warn("width '" + w + "' is not a valid.");
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284 }
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285
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286 try {
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287 height = Math.max(1, Integer.parseInt(h));
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288 }
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289 catch (NumberFormatException nfe) {
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290 log.warn("height '" + h + "' is not a valid");
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291 }
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292 }
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293
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294 return new Dimension(width, height);
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295 }
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296
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diff changeset
297 protected static String getFormat(Document input) {
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298 String format = DEFAULT_FORMAT;
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299
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300 NodeList formats = input.getElementsByTagName("format");
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301
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diff changeset
302 if (formats.getLength() > 0) {
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303 String type = ((Element)formats.item(0)).getAttribute("type");
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diff changeset
304 if (type.length() > 0) {
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diff changeset
305 format = type;
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diff changeset
306 }
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diff changeset
307 }
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diff changeset
308
cc0fa1798a3c FixingsKMChartService: Generate chart and deliver the image as the response of the service.
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diff changeset
309 return format;
2614
036e234c2385 Added service to generate a chart of fixings for given river and km applied
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parents:
diff changeset
310 }
036e234c2385 Added service to generate a chart of fixings for given river and km applied
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parents:
diff changeset
311 }
036e234c2385 Added service to generate a chart of fixings for given river and km applied
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parents:
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312 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org