Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/sq/SQRelationCalculation.java @ 3389:816ceb0418b9

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Q is not taken from MESSUNG.Q but from MESSUNG.Q_BPEGEL flys-artifacts/trunk@5017 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Mon, 16 Jul 2012 09:12:56 +0000
parents 8af1111af180
children 1c9aaef89f51
rev   line source
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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.ArrayList;
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16 import java.util.List;
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18 import org.apache.log4j.Logger;
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19
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20 public class SQRelationCalculation extends Calculation {
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22 private static final Logger log =
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23 Logger.getLogger(SQRelationCalculation.class);
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24
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25 public static final String SQ_FUNCTION_NAME = "sq-pow";
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26
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27 protected String river;
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28 protected double location;
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29 protected DateRange [] periods;
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30 protected double outliers;
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31
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32 public SQRelationCalculation() {
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33 }
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34
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35 public SQRelationCalculation(SQRelationAccess access) {
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37 String river = access.getRiver();
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38 Double location = access.getLocation();
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39 DateRange [] periods = access.getPeriods();
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40 Double outliers = access.getOutliers();
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41
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42 if (river == null) {
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43 // TODO: i18n
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44 addProblem("sq.missing.river");
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45 }
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46
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47 if (location == null) {
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48 // TODO: i18n
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49 addProblem("sq.missing.location");
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50 }
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51
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52 if (periods == null || periods.length == 0) {
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53 // TODO: i18n
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54 addProblem("sq.missing.periods");
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55 }
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56
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57 if (outliers == null) {
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58 // TODO: i18n
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59 addProblem("sq.missing.outliers");
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60 }
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61
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62 if (!hasProblems()) {
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63 this.river = river;
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64 this.location = location;
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65 this.periods = periods;
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66 this.outliers = outliers;
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67 }
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68 }
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69
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70
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71 public CalculationResult calculate() {
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72 log.debug("SQRelationCalculation.calculate");
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73
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74 if (hasProblems()) {
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75 return new CalculationResult(this);
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76 }
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77
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78 SedDBSessionHolder.acquire();
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79 try {
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80 return internalCalculate();
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81 }
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82 finally {
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83 SedDBSessionHolder.release();
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84 }
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85 }
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86
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87 protected CalculationResult internalCalculate() {
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88
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89 boolean debug = log.isDebugEnabled();
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90
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91 Function function = FunctionFactory
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92 .getInstance()
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93 .getFunction(SQ_FUNCTION_NAME);
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94
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95 if (function == null) {
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96 log.error("No '" + SQ_FUNCTION_NAME + "' function found.");
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97 // TODO: i18n
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98 addProblem("sq.missing.sq.function");
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99 }
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100
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101
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102 String [] parameterNames = function.getParameterNames();
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103
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104 List<SQResult> results = new ArrayList<SQResult>(periods.length);
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105
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106 Fitting fitting = new Fitting(function, outliers);
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107
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108 for (DateRange period: periods) {
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109 Measurements measurements =
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110 MeasurementFactory.getMeasurements(river, location, period);
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111
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112 if (debug) {
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113 log.debug(measurements.toString());
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114 }
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115
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116 SQFractionResult [] fractionResults =
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117 new SQFractionResult[SQResult.NUMBER_FRACTIONS];
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118
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119 for (int i = 0; i < fractionResults.length; ++i) {
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120 List<SQ> sqs = measurements.getSQs(i);
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121
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122 SQFractionResult fractionResult;
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123
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124 if (!fitting.fit(sqs)) {
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125 // TODO: i18n
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126 addProblem("sq.fitting.failed." + i);
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127 fractionResult = new SQFractionResult();
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128 }
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129 else {
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130 Parameters parameters = createParameters(parameterNames);
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131 int row = parameters.newRow();
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132 double [] coeffs = fitting.getParameters();
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133 for (int j = 0; j < parameterNames.length; ++j) {
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134 parameters.set(row, parameterNames[j], coeffs[j]);
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135 }
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136 parameters.set(row, "chi_sqr", fitting.getChiSqr());
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137 parameters.set(row, "std_dev", fitting.getStandardDeviation());
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138
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139 fractionResult = new SQFractionResult(
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140 parameters,
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141 fitting.getRemaining(),
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142 fitting.getOutliers());
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143 }
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144 fitting.reset();
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145 fractionResults[i] = fractionResult;
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146 }
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147 results.add(new SQResult(fractionResults));
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148 }
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149
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150 return new CalculationResult(
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151 results.toArray(new SQResult[results.size()]),
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152 this);
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153 }
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154
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155 public static final Parameters createParameters(String [] names) {
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156
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157 String [] columns = new String[names.length + 2];
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158 columns[0] = "chi_sqr";
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159 columns[1] = "std_dev";
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160 System.arraycopy(names, 0, columns, 2, names.length);
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161 return new Parameters(columns);
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162 }
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163 }
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164 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org