Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/sq/SQRelationCalculation.java @ 3304:02d5731b43a2
SQ relation: Build a valid SQResult.
flys-artifacts/trunk@4989 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Fri, 13 Jul 2012 11:12:35 +0000 |
parents | 79c8e0d9fdea |
children | b24920235944 |
rev | line source |
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1 package de.intevation.flys.artifacts.model.sq; |
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2 |
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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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14 |
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15 import java.util.List; |
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16 |
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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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20 |
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21 private static final Logger log = |
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22 Logger.getLogger(SQRelationCalculation.class); |
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23 |
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24 public static final String SQ_FUNCTION_NAME = "sq-pow"; |
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25 |
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26 protected String river; |
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27 protected double location; |
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28 protected DateRange [] periods; |
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29 protected double outliers; |
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30 |
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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 [] periods = access.getPeriods(); |
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39 Double outliers = access.getOutliers(); |
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40 |
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41 if (river == null) { |
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42 // TODO: i18n |
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43 addProblem("sq.missing.river"); |
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44 } |
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45 |
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46 if (location == null) { |
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47 // TODO: i18n |
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48 addProblem("sq.missing.location"); |
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49 } |
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50 |
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51 if (periods == null || periods.length == 0) { |
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52 // TODO: i18n |
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53 addProblem("sq.missing.periods"); |
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54 } |
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55 |
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56 if (outliers == null) { |
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57 // TODO: i18n |
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58 addProblem("sq.missing.outliers"); |
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59 } |
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60 |
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61 if (!hasProblems()) { |
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62 this.river = river; |
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63 this.location = location; |
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64 this.periods = periods; |
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65 this.outliers = outliers; |
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66 } |
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67 } |
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68 |
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69 |
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70 public CalculationResult calculate() { |
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71 log.debug("SQRelationCalculation.calculate"); |
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72 |
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73 if (hasProblems()) { |
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74 return new CalculationResult(this); |
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75 } |
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76 |
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77 SedDBSessionHolder.acquire(); |
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78 try { |
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79 return internalCalculate(); |
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80 } |
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81 finally { |
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82 SedDBSessionHolder.release(); |
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83 } |
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84 } |
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85 |
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86 protected CalculationResult internalCalculate() { |
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87 |
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88 boolean debug = log.isDebugEnabled(); |
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89 |
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90 Function function = FunctionFactory |
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91 .getInstance() |
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92 .getFunction(SQ_FUNCTION_NAME); |
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93 |
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94 if (function == null) { |
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95 log.error("No '" + SQ_FUNCTION_NAME + "' function found."); |
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96 // TODO: i18n |
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97 addProblem("sq.missing.sq.function"); |
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98 } |
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99 |
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100 // XXX: We can only produce one SQResult. |
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101 DateRange period = periods[0]; |
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102 |
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103 Measurements measurements = |
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104 MeasurementFactory.getMeasurements(river, location, period); |
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105 |
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106 if (debug) { |
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107 log.debug(measurements.toString()); |
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108 } |
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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 String [] parameterNames = function.getParameterNames(); |
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114 |
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115 Fitting fitting = new Fitting(function, outliers); |
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116 for (int i = 0; i < fractionResults.length; ++i) { |
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117 List<SQ> sqs = measurements.getSQs(i); |
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118 |
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119 SQFractionResult fractionResult; |
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120 |
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121 if (!fitting.fit(sqs)) { |
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122 // TODO: i18n |
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123 addProblem("sq.fitting.failed." + i); |
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124 fractionResult = new SQFractionResult(); |
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125 } |
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126 else { |
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127 Parameters parameters = createParameters(parameterNames); |
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128 int row = parameters.newRow(); |
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129 double [] coeffs = fitting.getParameters(); |
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130 for (int j = 0; j < parameterNames.length; ++j) { |
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131 parameters.set(row, parameterNames[j], coeffs[j]); |
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132 } |
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133 parameters.set(row, "chi_sqr", fitting.getChiSqr()); |
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134 parameters.set(row, "std_dev", fitting.getStandardDeviation()); |
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135 |
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136 fractionResult = new SQFractionResult( |
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137 parameters, |
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138 fitting.getRemaining(), |
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139 fitting.getOutliers()); |
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140 } |
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141 |
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142 fractionResults[i] = fractionResult; |
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143 |
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144 fitting.reset(); |
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145 } |
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146 |
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147 return new CalculationResult(new SQResult(fractionResults), this); |
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148 } |
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149 |
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150 public static final Parameters createParameters(String [] names) { |
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151 |
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152 String [] columns = new String[names.length + 2]; |
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153 columns[0] = "chi_sqr"; |
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154 columns[1] = "std_dev"; |
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155 System.arraycopy(names, 0, columns, 2, names.length); |
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156 return new Parameters(columns); |
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157 } |
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158 } |
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159 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 : |