Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/utils/VectorDataProcessor.java @ 1081:846b2b70b2e0

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Implemented histogram creation for vectorial timeseries. gnv-artifacts/trunk@1183 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Wed, 09 Jun 2010 09:51:05 +0000
parents 9bb1979aabbe
children f953c9a559d8
rev   line source
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1 package de.intevation.gnv.utils;
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2
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3 import de.intevation.artifacts.CallContext;
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4
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5 import de.intevation.gnv.chart.Chart;
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6 import de.intevation.gnv.chart.ChartLabels;
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7 import de.intevation.gnv.chart.DefaultHistogram;
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8
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9 import de.intevation.gnv.geobackend.base.DefaultResult;
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10 import de.intevation.gnv.geobackend.base.DefaultResultDescriptor;
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11 import de.intevation.gnv.geobackend.base.Result;
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12 import de.intevation.gnv.geobackend.base.ResultDescriptor;
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13
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14 import de.intevation.gnv.histogram.HistogramHelper;
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15
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16 import de.intevation.gnv.state.describedata.KeyValueDescibeData;
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17
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18 import java.util.ArrayList;
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19 import java.util.Collection;
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20 import java.util.HashMap;
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21 import java.util.Iterator;
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22 import java.util.List;
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23 import java.util.Locale;
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24 import java.util.Map;
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25
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26 import org.apache.log4j.Logger;
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27
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28 import org.jfree.chart.ChartTheme;
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30
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31 /**
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32 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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33 */
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34 public final class VectorDataProcessor {
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35
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36 private static Logger logger = Logger.getLogger(VectorDataProcessor.class);
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37
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38 public static Collection<Result> process(
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39 Collection<Result> input, String[] columnNames)
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40 {
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41 logger.info("Process vector data (" + input.size() + " items)");
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42
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43 ResultDescriptor outDescriptor = initResultDescriptor(columnNames);
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44 ResultDescriptor inDescriptor = null;
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45 int[] inIndices = null;
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46 int columns = -1;
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47
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48 Map series = new HashMap();
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49
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50 // for each result of the incoming result
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51 for (Result result: input) {
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52 if (inDescriptor == null || inIndices == null) {
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53 inDescriptor = result.getResultDescriptor();
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54 inIndices = inDescriptor.getColumnIndices(columnNames);
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55 columns = inDescriptor.getColumnCount();
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56 }
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57
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58 // for each column of the incoming result object
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59 for (int i = 0; i < columns; i++) {
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60 String name = inDescriptor.getColumnName(i);
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61
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62 if (!StringUtils.contains(columnNames, name)) {
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63 List list = (List) series.get(name);
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64 if (list == null)
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65 list = new ArrayList();
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66
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67 Result out = new DefaultResult(outDescriptor);
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68 Object value = result.getObject(i);
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69
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70 // skipp results that have no data value
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71 if (value == null)
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72 continue;
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73
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74 out.addColumnValue(0, value);
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75
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76 // add meta data to result object
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77 // TODO: Maybe we could do this one single time, because the
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78 // TODO: meta data will not change
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79 for (int j = 1; j < inIndices.length -1; j++) {
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80 out.addColumnValue(j, result.getObject(inIndices[j]));
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81 }
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82
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83 // add the name of the component to distinguish between
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84 // different series later in the chart creation
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85 out.addColumnValue(inIndices.length-1, name);
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86
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87 list.add(out);
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88 series.put(name, list);
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89 }
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90 }
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91 }
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92
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93 // finally, we put all lists together
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94 Iterator iter = series.values().iterator();
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95 List output = new ArrayList();
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96 while (iter.hasNext()) {
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97 output.addAll((Collection)iter.next());
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98 }
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99
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100 logger.info("Data processing created " + output.size() + " elements.");
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101 return output;
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102 }
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103
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104
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105 public static ResultDescriptor initResultDescriptor(String[] columnNames) {
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106 logger.debug("Init ResultDescriptor for outgoing results.");
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107
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108 ResultDescriptor desc = new DefaultResultDescriptor();
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109
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110 for (String name: columnNames) {
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111 desc.addColumn(name, "java.lang.String");
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112 }
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113
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114 logger.debug("Outgoing ResultDescriptor has " + desc.getColumnCount() +
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115 " columns");
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116 return desc;
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117 }
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118
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119
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120 public static Chart[] getHistograms(
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121 String uuid,
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122 CallContext callContext,
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123 Collection<KeyValueDescibeData> results,
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124 ChartTheme theme,
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125 Map requestParameter
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126 ) {
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127 Locale locale = (Locale) requestParameter.get("locale");
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128
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129 Object[][] data = HistogramHelper.prepareVectorialHistogramData(results);
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130 int size = data.length;
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131
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132 Chart[] histograms = new Chart[size];
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133
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134 for (int i = 0; i < size; i++) {
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135 ChartLabels labels = HistogramHelper.createHistogramLabels(
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136 uuid, callContext, locale, data[i]);
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137
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138 histograms[i] = new DefaultHistogram(
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139 labels, data[i], theme, requestParameter);
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140 }
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141
846b2b70b2e0 Implemented histogram creation for vectorial timeseries.
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142 return histograms;
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143 }
1040
70653c29fc1d Finished vector support for timeseriespoints (Issue27).
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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144 }
70653c29fc1d Finished vector support for timeseriespoints (Issue27).
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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145 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
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