Mercurial > dive4elements > river
annotate artifacts/src/main/java/org/dive4elements/river/artifacts/sinfo/common/GaugeDurationValuesFinder.java @ 9176:1614cb14308f
Work on calculations for S-Info flood duration workflow
author | mschaefer |
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date | Mon, 25 Jun 2018 19:21:11 +0200 |
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children | a4121ec450d6 |
rev | line source |
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1 /** Copyright (C) 2017 by Bundesanstalt für Gewässerkunde |
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2 * Software engineering by |
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3 * Björnsen Beratende Ingenieure GmbH |
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4 * Dr. Schumacher Ingenieurbüro für Wasser und Umwelt |
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5 * |
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6 * This file is Free Software under the GNU AGPL (>=v3) |
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7 * and comes with ABSOLUTELY NO WARRANTY! Check out the |
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8 * documentation coming with Dive4Elements River for details. |
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9 */ |
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10 package org.dive4elements.river.artifacts.sinfo.common; |
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11 |
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12 import org.apache.commons.lang.math.DoubleRange; |
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13 import org.apache.commons.math.FunctionEvaluationException; |
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14 import org.apache.commons.math.analysis.UnivariateRealFunction; |
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15 import org.apache.commons.math.analysis.interpolation.LinearInterpolator; |
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16 import org.dive4elements.river.artifacts.model.Calculation; |
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17 import org.dive4elements.river.model.Gauge; |
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18 import org.dive4elements.river.model.MainValue; |
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19 import org.dive4elements.river.model.MainValueType.MainValueTypeKey; |
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20 |
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21 import gnu.trove.TDoubleArrayList; |
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22 |
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23 /** |
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24 * Loading and search/interpolate the duration main values of a gauge |
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25 * |
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26 * @author Matthias Schäfer |
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27 * |
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28 */ |
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29 public final class GaugeDurationValuesFinder { |
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30 |
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31 /***** FIELDS *****/ |
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32 |
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33 // private static Logger log = Logger.getLogger(GaugeDurationValuesFinder.class); |
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34 |
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35 private final Gauge gauge; |
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36 |
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37 private Calculation problems; |
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38 |
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39 private UnivariateRealFunction qInterpolator; |
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40 |
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41 private DoubleRange qRange; |
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42 |
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43 private UnivariateRealFunction durInterpolator; |
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44 |
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45 private DoubleRange durRange; |
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46 |
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47 private final String approxPrefix = "ca."; // "\u2248" geht wohl nicht |
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48 |
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49 |
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50 /***** CONSTRUCTORS *****/ |
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51 |
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52 private GaugeDurationValuesFinder(final Gauge gauge, final Calculation problems) { |
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53 this.gauge = gauge; |
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54 this.problems = problems; |
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55 final TDoubleArrayList qs = new TDoubleArrayList(); |
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56 final TDoubleArrayList durs = new TDoubleArrayList(); |
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57 for (final MainValue v : MainValue.getValuesOfGaugeAndType(gauge, MainValueTypeKey.DURATION)) { |
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58 qs.add(v.getValue().doubleValue()); |
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59 durs.add(Integer.valueOf(v.getMainValue().getName()).doubleValue()); |
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60 } |
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61 try { |
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62 this.qInterpolator = new LinearInterpolator().interpolate(qs.toNativeArray(), durs.toNativeArray()); |
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63 this.qRange = new DoubleRange(qs.get(0), qs.get(qs.size() - 1)); |
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64 } |
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65 catch (final Exception e) { |
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66 this.qInterpolator = null; |
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67 this.qRange = null; |
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68 } |
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69 qs.clear(); |
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70 durs.clear(); |
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71 for (final MainValue v : MainValue.getDurationDischargesOfGauge(gauge)) { |
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72 durs.add(Integer.valueOf(v.getMainValue().getName()).doubleValue()); |
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73 qs.add(v.getValue().doubleValue()); |
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74 } |
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75 try { |
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76 this.durInterpolator = new LinearInterpolator().interpolate(durs.toNativeArray(), qs.toNativeArray()); |
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77 this.durRange = new DoubleRange(durs.get(0), durs.get(durs.size() - 1)); |
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78 } |
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79 catch (final Exception e) { |
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80 this.durInterpolator = null; |
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81 this.durRange = null; |
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82 } |
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83 if (((this.qInterpolator == null) || (this.durInterpolator == null)) && (this.problems != null)) { |
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84 this.problems.addProblem("gauge_duration.missing", gauge.getName()); |
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85 // Report only once |
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86 this.problems = null; |
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87 } |
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88 } |
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89 |
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90 |
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91 /***** METHODS *****/ |
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92 |
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93 /** |
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94 * Loads the the discharge-duration table of a gauge (GAUGE.glt) |
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95 * |
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96 * @return The main values finder of a a gauge, or null |
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97 */ |
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98 public static GaugeDurationValuesFinder loadValues(final Gauge gauge, final Calculation problems) { |
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99 return new GaugeDurationValuesFinder(gauge, problems); |
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100 } |
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101 |
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102 /** |
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103 * If this provider may return valid data at all. |
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104 */ |
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105 public boolean isValid() { |
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106 return (this.qInterpolator != null); |
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107 } |
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108 |
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109 /** |
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110 * Discharge for a duration |
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111 * |
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112 * @return Q, or NegInf for duration less than all, or PosInf for duration greater then all, or NaN in case of exception |
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113 */ |
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114 public double getDischarge(final int duration) { |
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115 try { |
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116 if (this.durInterpolator == null) |
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117 return Double.NaN; |
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118 else if (duration < this.durRange.getMinimumDouble()) |
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119 return Double.NEGATIVE_INFINITY; |
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120 else if (duration > this.durRange.getMaximumDouble()) |
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121 return Double.POSITIVE_INFINITY; |
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122 else |
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123 return this.durInterpolator.value(duration); |
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124 } |
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125 catch (@SuppressWarnings("unused") final FunctionEvaluationException e) { |
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126 // ignore exception because this can/will happen regularly |
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127 return Double.NaN; |
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128 } |
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129 } |
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130 |
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131 /** |
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132 * Duration for a discharge |
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133 * |
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134 * @return duration, or 0 for Q less than all, or 365 for duration greater then all, or -1 in case of exception |
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135 */ |
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136 public double getDuration(final double q) { |
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137 try { |
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138 if (this.qInterpolator == null) |
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139 return -1; |
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140 else if (q < this.qRange.getMinimumDouble()) |
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141 return 0; |
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142 else if (q > this.qRange.getMaximumDouble()) |
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143 return 365; |
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144 else |
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145 return this.qInterpolator.value(q); |
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146 } |
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147 catch (@SuppressWarnings("unused") final FunctionEvaluationException e) { |
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148 // ignore exception because this can/will happen regularly |
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149 return -1; |
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150 } |
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151 } |
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152 } |