Mercurial > dive4elements > gnv-client
comparison gnv-artifacts/src/main/java/de/intevation/gnv/statistics/VectorStatistics.java @ 1119:7c4f81f74c47
merged gnv-artifacts
| author | Thomas Arendsen Hein <thomas@intevation.de> |
|---|---|
| date | Fri, 28 Sep 2012 12:14:00 +0200 |
| parents | f953c9a559d8 |
| children |
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| 1027:fca4b5eb8d2f | 1119:7c4f81f74c47 |
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| 1 /* | |
| 2 * Copyright (c) 2010 by Intevation GmbH | |
| 3 * | |
| 4 * This program is free software under the LGPL (>=v2.1) | |
| 5 * Read the file LGPL.txt coming with the software for details | |
| 6 * or visit http://www.gnu.org/licenses/ if it does not exist. | |
| 7 */ | |
| 8 | |
| 9 package de.intevation.gnv.statistics; | |
| 10 | |
| 11 import de.intevation.gnv.geobackend.base.Result; | |
| 12 import de.intevation.gnv.geobackend.base.ResultDescriptor; | |
| 13 | |
| 14 import de.intevation.gnv.state.describedata.KeyValueDescibeData; | |
| 15 | |
| 16 import de.intevation.gnv.statistics.exception.StatisticsException; | |
| 17 | |
| 18 import java.sql.SQLException; | |
| 19 | |
| 20 import java.util.ArrayList; | |
| 21 import java.util.Collection; | |
| 22 import java.util.Iterator; | |
| 23 | |
| 24 import org.apache.commons.math.stat.descriptive.DescriptiveStatistics; | |
| 25 | |
| 26 import org.apache.commons.math.stat.regression.SimpleRegression; | |
| 27 | |
| 28 import org.apache.log4j.Logger; | |
| 29 | |
| 30 | |
| 31 /** | |
| 32 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> | |
| 33 */ | |
| 34 public abstract class VectorStatistics | |
| 35 extends AbstractStatistics | |
| 36 { | |
| 37 private static Logger logger = | |
| 38 Logger.getLogger(VectorStatistics.class); | |
| 39 | |
| 40 private ResultDescriptor rd; | |
| 41 | |
| 42 | |
| 43 public VectorStatistics() { | |
| 44 } | |
| 45 | |
| 46 | |
| 47 public Collection<StatisticSet> calculateStatistics( | |
| 48 Object result, | |
| 49 Collection<KeyValueDescibeData> parameters, | |
| 50 Collection<KeyValueDescibeData> measurements, | |
| 51 Collection<KeyValueDescibeData> dates | |
| 52 ) throws StatisticsException { | |
| 53 if (!(result instanceof Collection)) | |
| 54 return new ArrayList<StatisticSet>(); | |
| 55 | |
| 56 Collection<Result> results = (Collection<Result>) result; | |
| 57 Collection<StatisticSet> stats = new ArrayList<StatisticSet>(); | |
| 58 | |
| 59 SimpleRegression lRegression = new SimpleRegression(); | |
| 60 DescriptiveStatistics lStatistics = new DescriptiveStatistics(); | |
| 61 | |
| 62 Result previous = null; | |
| 63 Result row = null; | |
| 64 String seriesName = null; | |
| 65 int valueIdx = -1; | |
| 66 int seriesIdx = -1; | |
| 67 | |
| 68 Iterator<Result> iter = results.iterator(); | |
| 69 | |
| 70 while (iter.hasNext()) { | |
| 71 row = iter.next(); | |
| 72 previous = previous == null ? row : previous; | |
| 73 | |
| 74 if (rd == null || seriesIdx == -1) { | |
| 75 rd = row.getResultDescriptor(); | |
| 76 valueIdx = getValueIdx(rd); | |
| 77 seriesIdx = rd.getColumnIndex("SERIES"); | |
| 78 } | |
| 79 | |
| 80 if (seriesName != null | |
| 81 && !row.getString(seriesIdx).equals(seriesName)) | |
| 82 { | |
| 83 stats.add(generateStatisticsValues( | |
| 84 lStatistics, lRegression, seriesName)); | |
| 85 | |
| 86 lStatistics.clear(); | |
| 87 lRegression.clear(); | |
| 88 | |
| 89 clear(); | |
| 90 } | |
| 91 | |
| 92 Double yValue = getValue(row, valueIdx); | |
| 93 | |
| 94 if (yValue != null) { | |
| 95 lStatistics.addValue(yValue); | |
| 96 | |
| 97 try { | |
| 98 double x = calculateXOrdinateValue(previous, row); | |
| 99 lRegression.addData(x, yValue); | |
| 100 } | |
| 101 catch (SQLException sqle) { | |
| 102 logger.warn(sqle, sqle); | |
| 103 } | |
| 104 } | |
| 105 | |
| 106 seriesName = row.getString(seriesIdx); | |
| 107 previous = row; | |
| 108 } | |
| 109 | |
| 110 if (seriesName != null && row != null) { | |
| 111 stats.add(generateStatisticsValues( | |
| 112 lStatistics, lRegression, seriesName)); | |
| 113 | |
| 114 lStatistics.clear(); | |
| 115 lRegression.clear(); | |
| 116 } | |
| 117 | |
| 118 return stats; | |
| 119 } | |
| 120 | |
| 121 | |
| 122 protected Double getValue(Result row, int idx) { | |
| 123 return row.getDouble(idx); | |
| 124 } | |
| 125 | |
| 126 | |
| 127 abstract protected void clear(); | |
| 128 | |
| 129 abstract protected int getValueIdx(ResultDescriptor rd); | |
| 130 | |
| 131 abstract protected double calculateXOrdinateValue(Result prev, Result now) | |
| 132 throws SQLException; | |
| 133 } | |
| 134 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 : |