Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/chart/TimeSeriesChart.java @ 315:63f8b3fb7d9a

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Localization of chart axis with locale which fits best to server and browser settings. gnv-artifacts/trunk@373 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Thu, 26 Nov 2009 08:47:44 +0000
parents 19fbd03544ea
children 22a6493e8460
rev   line source
298
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1 package de.intevation.gnv.chart;
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2
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3 import java.text.DateFormat;
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4 import java.text.SimpleDateFormat;
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5 import java.util.Collection;
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6 import java.util.Iterator;
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7 import java.util.Locale;
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8
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9 import org.apache.log4j.Logger;
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10
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11 import org.jfree.chart.ChartTheme;
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12 import org.jfree.chart.ChartFactory;
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13 import org.jfree.chart.JFreeChart;
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14 import org.jfree.chart.axis.Axis;
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15 import org.jfree.chart.axis.DateAxis;
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16 import org.jfree.chart.plot.XYPlot;
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17 import org.jfree.chart.plot.PlotOrientation;
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18 import org.jfree.data.general.Series;
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19 import org.jfree.data.time.TimeSeries;
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20 import org.jfree.data.time.Minute;
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21 import org.jfree.data.time.TimeSeriesCollection;
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23 import de.intevation.gnv.geobackend.base.Result;
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25
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26 /**
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27 * @author Ingo Weinzierl <ingo.weinzierl@intevation.de>
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28 */
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29 public class TimeSeriesChart
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30 extends AbstractXYLineChart
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31 {
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32
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33 private static final String DATE_FORMAT = "dd-MMM";
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34
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35 private static Logger log = Logger.getLogger(TimeSeriesChart.class);
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36
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37
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38 public TimeSeriesChart(
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39 ChartLabels labels,
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40 ChartTheme theme,
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41 Collection parameters,
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42 Collection measurements,
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43 Collection dates,
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44 Collection result,
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45 Collection timeGaps,
298
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46 Locale locale
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47 ) {
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48 this.labels = labels;
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49 this.theme = theme;
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50 this.parameters = parameters;
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51 this.measurements = measurements;
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52 this.dates = dates;
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53 this.resultSet = result;
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54 this.timeGaps = timeGaps;
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55 this.locale = locale;
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56 this.PLOT_ORIENTATION = PlotOrientation.VERTICAL;
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57 }
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58
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59
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60 public JFreeChart generateChart() {
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61 log.debug("generate timeseries chart");
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62
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63 if (chart != null)
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64 return chart;
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65
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66 chart = ChartFactory.createTimeSeriesChart(
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67 labels.getTitle(),
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68 labels.getDomainAxisLabel(),
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69 null,
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70 null,
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71 true,
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72 false,
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73 false
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74 );
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75
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76 theme.apply(chart);
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77 initData();
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78
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79 return chart;
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80 }
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81
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82
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83 protected void initData() {
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84 log.debug("init data for timeseries chart");
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85
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86 String breakPoint1 = null;
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87 String breakPoint2 = null;
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88 String breakPoint3 = null;
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89
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90 Iterator iter = resultSet.iterator();
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91 Result row = null;
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92 String seriesName = null;
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93 TimeSeries series = null;
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94
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95 int idx = 0;
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96
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97 while (iter.hasNext()) {
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98 row = (Result) iter.next();
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99
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100 // add current data to plot and prepare for next one
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101 if (!row.getString("GROUP1").equals(breakPoint1) ||
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102 !row.getString("GROUP2").equals(breakPoint2) ||
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103 !row.getString("GROUP3").equals(breakPoint3)
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104 ) {
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105 log.debug("prepare data/plot for next dataset");
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106
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107 if(series != null) {
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108 addSeries(series, idx);
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109 prepareAxis(((String)series.getKey()), idx++);
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110 }
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111
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112 // prepare variables for next plot
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113 breakPoint1 = row.getString("GROUP1");
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114 breakPoint2 = row.getString("GROUP2");
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115 breakPoint3 = row.getString("GROUP3");
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116
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117 seriesName = createSeriesName(
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118 breakPoint1,
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119 breakPoint2,
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120 breakPoint3
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121 );
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122
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123 log.debug("next dataset is '" + seriesName + "'");
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124 series = new TimeSeries(seriesName, Minute.class);
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125 }
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126
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127 addValue(row, series);
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128 }
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129
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130 // add the last dataset if existing to plot and prepare its axis
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131 addSeries(series, idx);
310
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132
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133 if (series != null)
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134 prepareAxis(((String)series.getKey()), idx++);
298
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135 }
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136
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137
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138 protected void addValue(Result row, Series series) {
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139 // TODO look for gaps between two values
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140 ((TimeSeries) series).addOrUpdate(
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141 new Minute(row.getDate("XORDINATE")),
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142 row.getDouble("YORDINATE")
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143 );
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144 }
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145
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146
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147 protected void addSeries(Series series, int idx) {
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148 log.debug("add series to timeseries chart");
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149 XYPlot plot = chart.getXYPlot();
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150
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151 if (series == null) {
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152 log.warn("no data to add");
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153 return;
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154 }
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155
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156 TimeSeriesCollection tsc = new TimeSeriesCollection((TimeSeries)series);
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157 plot.setDataset(idx, tsc);
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158 }
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159
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160
315
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161 protected void localizeDomainAxis(Axis axis, Locale locale) {
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162 if (locale == null)
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163 return;
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164
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165 log.debug(
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166 "Set language of axis [" + axis.getLabel() + "] " +
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167 "to " + locale.toString()
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168 );
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169
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170 DateFormat format = new SimpleDateFormat(DATE_FORMAT, locale);
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171 ((DateAxis) axis).setDateFormatOverride(format);
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172 }
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173
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174
298
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175 protected String createSeriesName(
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176 String breakPoint1,
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177 String breakPoint2,
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178 String breakPoint3
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179 ) {
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180 log.debug("create seriesname of timeseries chart");
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181 return findValueTitle(parameters, breakPoint1) +
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182 " " +
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183 findValueTitle(measurements, breakPoint2) +
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184 "m";
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185 }
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186 }
315
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187 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org