Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/statistics/VectorStatistics.java @ 1117:dec4257ad570

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Changed imports to fit new positions of XMLUtils and Config gnv-artifacts/trunk@1478 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Tue, 15 Mar 2011 16:13:39 +0000
parents f953c9a559d8
children
rev   line source
1115
f953c9a559d8 Added license file and license headers.
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1 /*
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2 * Copyright (c) 2010 by Intevation GmbH
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3 *
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4 * This program is free software under the LGPL (>=v2.1)
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5 * Read the file LGPL.txt coming with the software for details
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6 * or visit http://www.gnu.org/licenses/ if it does not exist.
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7 */
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8
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9 package de.intevation.gnv.statistics;
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10
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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.state.describedata.KeyValueDescibeData;
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15
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16 import de.intevation.gnv.statistics.exception.StatisticsException;
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17
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18 import java.sql.SQLException;
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19
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20 import java.util.ArrayList;
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21 import java.util.Collection;
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22 import java.util.Iterator;
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23
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24 import org.apache.commons.math.stat.descriptive.DescriptiveStatistics;
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25
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26 import org.apache.commons.math.stat.regression.SimpleRegression;
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27
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28 import org.apache.log4j.Logger;
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29
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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 abstract class VectorStatistics
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35 extends AbstractStatistics
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36 {
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37 private static Logger logger =
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38 Logger.getLogger(VectorStatistics.class);
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39
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40 private ResultDescriptor rd;
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41
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42
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43 public VectorStatistics() {
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44 }
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45
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46
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47 public Collection<StatisticSet> calculateStatistics(
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48 Object result,
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49 Collection<KeyValueDescibeData> parameters,
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50 Collection<KeyValueDescibeData> measurements,
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51 Collection<KeyValueDescibeData> dates
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52 ) throws StatisticsException {
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53 if (!(result instanceof Collection))
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54 return new ArrayList<StatisticSet>();
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55
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56 Collection<Result> results = (Collection<Result>) result;
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57 Collection<StatisticSet> stats = new ArrayList<StatisticSet>();
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58
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59 SimpleRegression lRegression = new SimpleRegression();
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60 DescriptiveStatistics lStatistics = new DescriptiveStatistics();
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61
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62 Result previous = null;
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63 Result row = null;
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64 String seriesName = null;
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65 int valueIdx = -1;
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66 int seriesIdx = -1;
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67
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68 Iterator<Result> iter = results.iterator();
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69
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70 while (iter.hasNext()) {
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71 row = iter.next();
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72 previous = previous == null ? row : previous;
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73
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74 if (rd == null || seriesIdx == -1) {
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75 rd = row.getResultDescriptor();
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76 valueIdx = getValueIdx(rd);
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77 seriesIdx = rd.getColumnIndex("SERIES");
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78 }
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79
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80 if (seriesName != null
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81 && !row.getString(seriesIdx).equals(seriesName))
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82 {
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83 stats.add(generateStatisticsValues(
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84 lStatistics, lRegression, seriesName));
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85
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86 lStatistics.clear();
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87 lRegression.clear();
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88
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89 clear();
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90 }
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91
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92 Double yValue = getValue(row, valueIdx);
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93
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94 if (yValue != null) {
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95 lStatistics.addValue(yValue);
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96
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97 try {
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98 double x = calculateXOrdinateValue(previous, row);
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99 lRegression.addData(x, yValue);
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100 }
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101 catch (SQLException sqle) {
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102 logger.warn(sqle, sqle);
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103 }
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104 }
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105
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106 seriesName = row.getString(seriesIdx);
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107 previous = row;
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108 }
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109
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110 if (seriesName != null && row != null) {
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111 stats.add(generateStatisticsValues(
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112 lStatistics, lRegression, seriesName));
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113
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114 lStatistics.clear();
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115 lRegression.clear();
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116 }
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117
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118 return stats;
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119 }
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120
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121
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122 protected Double getValue(Result row, int idx) {
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123 return row.getDouble(idx);
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124 }
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125
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126
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127 abstract protected void clear();
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128
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129 abstract protected int getValueIdx(ResultDescriptor rd);
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130
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131 abstract protected double calculateXOrdinateValue(Result prev, Result now)
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132 throws SQLException;
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133 }
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134 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org