Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/sq/SQRelationCalculation.java @ 3426:e7a67407dea1

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Limited the input of time periods in SQ relation calculation to 1. flys-artifacts/trunk@5082 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Fri, 20 Jul 2012 09:34:47 +0000
parents 56f62b5209f5
children 1df6984628c3
rev   line source
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0d3dd8230064 Added component stubs for SQ relation calculation.
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1 package de.intevation.flys.artifacts.model.sq;
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3 import de.intevation.flys.artifacts.access.SQRelationAccess;
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4
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5 import de.intevation.flys.artifacts.math.fitting.Function;
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6 import de.intevation.flys.artifacts.math.fitting.FunctionFactory;
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7
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8 import de.intevation.flys.artifacts.model.Calculation;
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9 import de.intevation.flys.artifacts.model.CalculationResult;
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10 import de.intevation.flys.artifacts.model.DateRange;
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11 import de.intevation.flys.artifacts.model.Parameters;
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13 import de.intevation.flys.backend.SedDBSessionHolder;
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15 import java.util.List;
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17 import org.apache.log4j.Logger;
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18
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19 public class SQRelationCalculation extends Calculation {
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21 private static final Logger log =
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22 Logger.getLogger(SQRelationCalculation.class);
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24 public static final String SQ_FUNCTION_NAME = "sq-pow";
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26 protected String river;
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27 protected double location;
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28 protected DateRange period;
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29 protected double outliers;
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31 public SQRelationCalculation() {
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32 }
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33
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34 public SQRelationCalculation(SQRelationAccess access) {
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35
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36 String river = access.getRiver();
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37 Double location = access.getLocation();
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38 DateRange period = access.getPeriod();
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39 Double outliers = access.getOutliers();
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40
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41 //river = "Rhein";
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42
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43 if (river == null) {
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44 // TODO: i18n
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45 addProblem("sq.missing.river");
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46 }
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48 if (location == null) {
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49 // TODO: i18n
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50 addProblem("sq.missing.location");
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51 }
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52
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53 if (period == null) {
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54 // TODO: i18n
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55 addProblem("sq.missing.periods");
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56 }
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57
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58 if (outliers == null) {
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59 // TODO: i18n
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60 addProblem("sq.missing.outliers");
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61 }
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62
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63 if (!hasProblems()) {
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64 this.river = river;
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65 this.location = location;
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66 this.period = period;
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67 this.outliers = outliers;
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68 }
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69 }
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70
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71
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72 public CalculationResult calculate() {
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73 log.debug("SQRelationCalculation.calculate");
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74
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75 if (hasProblems()) {
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76 return new CalculationResult(this);
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77 }
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78
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79 SedDBSessionHolder.acquire();
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80 try {
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81 return internalCalculate();
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82 }
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83 finally {
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84 SedDBSessionHolder.release();
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85 }
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86 }
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87
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88 protected CalculationResult internalCalculate() {
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89
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90 boolean debug = log.isDebugEnabled();
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91
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92 Function function = FunctionFactory
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93 .getInstance()
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94 .getFunction(SQ_FUNCTION_NAME);
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95
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96 if (function == null) {
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97 log.error("No '" + SQ_FUNCTION_NAME + "' function found.");
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98 // TODO: i18n
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99 addProblem("sq.missing.sq.function");
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100 }
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101
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102
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103 String [] parameterNames = function.getParameterNames();
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104
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105 Fitting fitting = new Fitting(function, outliers);
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106
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107 Measurements measurements =
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108 MeasurementFactory.getMeasurements(river, location, period);
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109
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110 SQFractionResult [] fractionResults =
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111 new SQFractionResult[SQResult.NUMBER_FRACTIONS];
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112
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113 for (int i = 0; i < fractionResults.length; ++i) {
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114 List<SQ> sqs = measurements.getSQs(i);
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115
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116 SQFractionResult fractionResult;
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117
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118 if (!fitting.fit(sqs)) {
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119 // TODO: i18n
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120 addProblem("sq.fitting.failed." + i);
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121 fractionResult = new SQFractionResult();
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122 }
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123 else {
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124 Parameters parameters = createParameters(parameterNames);
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125 int row = parameters.newRow();
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126 double [] coeffs = fitting.getParameters();
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127 for (int j = 0; j < parameterNames.length; ++j) {
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128 parameters.set(row, parameterNames[j], coeffs[j]);
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129 }
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130 parameters.set(row, "chi_sqr", fitting.getChiSqr());
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131 parameters.set(row, "std_dev", fitting.getStandardDeviation());
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132
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133 fractionResult = new SQFractionResult(
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134 parameters,
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135 fitting.getRemaining(),
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136 fitting.getOutliers());
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137 }
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138 fitting.reset();
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139 fractionResults[i] = fractionResult;
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140 }
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141
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142 return new CalculationResult(
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143 new SQResult[] { new SQResult(location, fractionResults) },
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144 this);
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145 }
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146
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147 public static final Parameters createParameters(String [] names) {
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148
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149 String [] columns = new String[names.length + 2];
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150 columns[0] = "chi_sqr";
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151 columns[1] = "std_dev";
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152 System.arraycopy(names, 0, columns, 2, names.length);
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153 return new Parameters(columns);
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154 }
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155 }
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156 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org