Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/DischargeTables.java @ 1929:6b0ae0f2cae6

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(Minor) cosmetics, docs. flys-artifacts/trunk@3309 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Felix Wolfsteller <felix.wolfsteller@intevation.de>
date Wed, 23 Nov 2011 14:04:01 +0000
parents db68806e6563
children 59af81364eb1
rev   line source
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e8dfe6ba2000 Fetch w/q values of discharge tables for given gauges.
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1 package de.intevation.flys.artifacts.model;
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2
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3 import java.util.List;
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4 import java.util.Map;
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5 import java.util.HashMap;
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6 import java.util.Arrays;
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7 import java.util.Comparator;
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8
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9 import java.io.Serializable;
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11 import org.hibernate.Session;
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12 import org.hibernate.Query;
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14 import org.apache.log4j.Logger;
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16 import de.intevation.flys.backend.SessionHolder;
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17 import de.intevation.flys.model.Gauge;
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18 import de.intevation.flys.model.DischargeTable;
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19 import de.intevation.flys.model.DischargeTableValue;
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21 public class DischargeTables
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22 implements Serializable
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23 {
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24 private static Logger log = Logger.getLogger(DischargeTables.class);
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26 public static final double DEFAULT_SCALE = 100.0;
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28 public static final int MASTER = 0;
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30 protected List<String> gaugeNames;
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32 protected String riverName;
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34 protected double scale;
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36 protected int kind;
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38 protected Map<String, double [][]> values;
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40 public DischargeTables() {
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41 }
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43 public DischargeTables(String riverName, String gaugeName) {
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44 this(riverName, gaugeName, MASTER);
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45 }
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47 public DischargeTables(String riverName, String gaugeName, int kind) {
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48 this(riverName, new String [] { gaugeName }, kind);
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49 }
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51 public DischargeTables(String riverName, String [] gaugeNames) {
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52 this(riverName, gaugeNames, MASTER);
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53 }
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55 public DischargeTables(String riverName, String [] gaugeNames, int kind) {
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56 this(riverName, Arrays.asList(gaugeNames), kind);
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57 }
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59 public DischargeTables(
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60 String riverName,
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61 List<String> gaugeNames,
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62 int kind
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63 ) {
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64 scale = Double.NaN;
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65 this.kind = kind;
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66 this.riverName = riverName;
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67 this.gaugeNames = gaugeNames;
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68 }
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69
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70 public double [][] getFirstTable() {
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71 return getFirstTable(DEFAULT_SCALE);
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72 }
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74 public double [][] getFirstTable(double scale) {
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75 Map<String, double [][]> values = getValues(scale);
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76 for (double [][] table: values.values()) {
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77 return table;
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78 }
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79 return null;
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80 }
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81
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82 public Map<String, double [][]> getValues() {
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83 return getValues(DEFAULT_SCALE);
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84 }
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85
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86 public Map<String, double [][]> getValues(double scale) {
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87 if (values == null || scale != this.scale) {
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88 values = loadValues(scale);
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89 this.scale = scale;
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90 }
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91 return values;
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92 }
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93
1929
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94 /**
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95 * Returns mapping of gauge name to values.
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96 */
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97 protected Map<String, double [][]> loadValues(double scale) {
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98 Map<String, double [][]> values = new HashMap<String, double [][]>();
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99
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100 Session session = SessionHolder.HOLDER.get();
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101
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102 Query gaugeQuery = session.createQuery(
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103 "from Gauge where name=:gauge and river.name=:river");
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104 gaugeQuery.setParameter("river", riverName);
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106 for (String gaugeName: gaugeNames) {
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107 gaugeQuery.setParameter("gauge", gaugeName);
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108 List<Gauge> gauges = gaugeQuery.list();
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109 if (gauges.isEmpty()) {
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110 log.warn(
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111 "no gauge '"+gaugeName+"' at river '"+riverName+"'");
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112 continue;
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113 }
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diff changeset
114 Gauge gauge = gauges.get(0);
146
e8dfe6ba2000 Fetch w/q values of discharge tables for given gauges.
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parents:
diff changeset
115
311
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diff changeset
116 List<DischargeTable> tables = gauge.getDischargeTables();
146
e8dfe6ba2000 Fetch w/q values of discharge tables for given gauges.
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diff changeset
117
311
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diff changeset
118 if (tables.isEmpty()) {
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diff changeset
119 log.warn(
ea3a438a7021 Backend access: Static methods are using the SessionHolder, too.
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parents: 154
diff changeset
120 "no discharge table for gauge '" + gaugeName + "'");
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parents: 154
diff changeset
121 continue;
146
e8dfe6ba2000 Fetch w/q values of discharge tables for given gauges.
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parents:
diff changeset
122 }
e8dfe6ba2000 Fetch w/q values of discharge tables for given gauges.
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parents:
diff changeset
123
311
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diff changeset
124 // TODO: Filter by time interval
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diff changeset
125 DischargeTable table = tables.get(0);
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diff changeset
126
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diff changeset
127 List<DischargeTableValue> dtvs =
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diff changeset
128 table.getDischargeTableValues();
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diff changeset
129
333
67b3f54188aa Discharge tables: Sorting of q values was done wrong.
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diff changeset
130 final double [][] vs = new double[2][dtvs.size()];
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diff changeset
131
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diff changeset
132 boolean qSorted = true;
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diff changeset
133
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diff changeset
134 double lastQ = -Double.MAX_VALUE;
311
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diff changeset
135
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diff changeset
136 int idx = 0;
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parents: 154
diff changeset
137 for (DischargeTableValue dtv: dtvs) {
333
67b3f54188aa Discharge tables: Sorting of q values was done wrong.
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138 double q = dtv.getQ().doubleValue();
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diff changeset
139 vs[0][idx] = q * scale;
311
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diff changeset
140 vs[1][idx] = dtv.getW().doubleValue() * scale;
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parents: 154
diff changeset
141 ++idx;
333
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diff changeset
142
67b3f54188aa Discharge tables: Sorting of q values was done wrong.
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diff changeset
143 if (qSorted && lastQ > q) {
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parents: 329
diff changeset
144 qSorted = false;
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parents: 329
diff changeset
145 }
67b3f54188aa Discharge tables: Sorting of q values was done wrong.
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diff changeset
146 lastQ = q;
311
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parents: 154
diff changeset
147 }
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parents: 154
diff changeset
148
333
67b3f54188aa Discharge tables: Sorting of q values was done wrong.
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diff changeset
149 if (!qSorted) {
67b3f54188aa Discharge tables: Sorting of q values was done wrong.
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parents: 329
diff changeset
150 log.debug("need to sort by q values");
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parents: 329
diff changeset
151 // TODO: Do this db level.
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parents: 329
diff changeset
152 // XXX: This is so ugly :-(
67b3f54188aa Discharge tables: Sorting of q values was done wrong.
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parents: 329
diff changeset
153 Integer [] indices = new Integer[vs[0].length];
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parents: 329
diff changeset
154 for (int i = 0; i < indices.length; ++i) {
67b3f54188aa Discharge tables: Sorting of q values was done wrong.
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parents: 329
diff changeset
155 indices[i] = i;
67b3f54188aa Discharge tables: Sorting of q values was done wrong.
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parents: 329
diff changeset
156 }
329
0b2358bc716d Discharge table: Added static method getWForQ() to interpolate a w value for a given q value based on a given discharge table.
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parents: 328
diff changeset
157
333
67b3f54188aa Discharge tables: Sorting of q values was done wrong.
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diff changeset
158 Arrays.sort(indices, new Comparator<Integer>() {
67b3f54188aa Discharge tables: Sorting of q values was done wrong.
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diff changeset
159 public int compare(Integer a, Integer b) {
67b3f54188aa Discharge tables: Sorting of q values was done wrong.
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parents: 329
diff changeset
160 double va = vs[1][a];
67b3f54188aa Discharge tables: Sorting of q values was done wrong.
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parents: 329
diff changeset
161 double vb = vs[1][b];
67b3f54188aa Discharge tables: Sorting of q values was done wrong.
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parents: 329
diff changeset
162 double d = va - vb;
67b3f54188aa Discharge tables: Sorting of q values was done wrong.
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parents: 329
diff changeset
163 if (d < 0.0) return -1;
67b3f54188aa Discharge tables: Sorting of q values was done wrong.
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parents: 329
diff changeset
164 if (d > 0.0) return +1;
67b3f54188aa Discharge tables: Sorting of q values was done wrong.
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parents: 329
diff changeset
165 return 0;
67b3f54188aa Discharge tables: Sorting of q values was done wrong.
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parents: 329
diff changeset
166 }
67b3f54188aa Discharge tables: Sorting of q values was done wrong.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 329
diff changeset
167 });
67b3f54188aa Discharge tables: Sorting of q values was done wrong.
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parents: 329
diff changeset
168
67b3f54188aa Discharge tables: Sorting of q values was done wrong.
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parents: 329
diff changeset
169 double [][] vs2 = new double[2][vs[0].length];
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parents: 329
diff changeset
170 for (int i = 0; i < indices.length; ++i) {
67b3f54188aa Discharge tables: Sorting of q values was done wrong.
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parents: 329
diff changeset
171 vs2[0][i] = vs[0][indices[i]];
337
ec17fad34061 Discharge table: Fix problem when sorting by q (copied w instead of q).
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 336
diff changeset
172 vs2[1][i] = vs[1][indices[i]];
333
67b3f54188aa Discharge tables: Sorting of q values was done wrong.
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parents: 329
diff changeset
173 }
67b3f54188aa Discharge tables: Sorting of q values was done wrong.
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parents: 329
diff changeset
174 values.put(gaugeName, vs2);
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parents: 329
diff changeset
175 }
67b3f54188aa Discharge tables: Sorting of q values was done wrong.
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parents: 329
diff changeset
176 else {
67b3f54188aa Discharge tables: Sorting of q values was done wrong.
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parents: 329
diff changeset
177 values.put(gaugeName, vs);
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parents: 329
diff changeset
178 }
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parents: 329
diff changeset
179
146
e8dfe6ba2000 Fetch w/q values of discharge tables for given gauges.
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parents:
diff changeset
180 }
311
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diff changeset
181
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diff changeset
182 return values;
146
e8dfe6ba2000 Fetch w/q values of discharge tables for given gauges.
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parents:
diff changeset
183 }
329
0b2358bc716d Discharge table: Added static method getWForQ() to interpolate a w value for a given q value based on a given discharge table.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 328
diff changeset
184
376
aa0889141b15 Removed an unused parameter from DischargeTables.getQForW().
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 337
diff changeset
185 public static double getQForW(double [][] values, double w) {
378
20c3a5b36434 Repaired DischargeTables.getQForW()
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parents: 376
diff changeset
186
20c3a5b36434 Repaired DischargeTables.getQForW()
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parents: 376
diff changeset
187 boolean debug = log.isDebugEnabled();
20c3a5b36434 Repaired DischargeTables.getQForW()
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parents: 376
diff changeset
188
20c3a5b36434 Repaired DischargeTables.getQForW()
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parents: 376
diff changeset
189 if (debug) {
20c3a5b36434 Repaired DischargeTables.getQForW()
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parents: 376
diff changeset
190 log.debug("calculating getQForW(" + w + ")");
20c3a5b36434 Repaired DischargeTables.getQForW()
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parents: 376
diff changeset
191 }
20c3a5b36434 Repaired DischargeTables.getQForW()
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parents: 376
diff changeset
192
735
db68806e6563 Fixed "W am Pegel" calculations.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 378
diff changeset
193 int index = Arrays.binarySearch(values[1], w);
329
0b2358bc716d Discharge table: Added static method getWForQ() to interpolate a w value for a given q value based on a given discharge table.
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parents: 328
diff changeset
194 if (index >= 0) {
334
b7c8df643dc4 Discharge table: we need a getQForW() and not a getWForQ().
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 333
diff changeset
195 return values[0][index];
329
0b2358bc716d Discharge table: Added static method getWForQ() to interpolate a w value for a given q value based on a given discharge table.
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parents: 328
diff changeset
196 }
0b2358bc716d Discharge table: Added static method getWForQ() to interpolate a w value for a given q value based on a given discharge table.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 328
diff changeset
197
0b2358bc716d Discharge table: Added static method getWForQ() to interpolate a w value for a given q value based on a given discharge table.
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parents: 328
diff changeset
198 index = -index - 1; // insert position
0b2358bc716d Discharge table: Added static method getWForQ() to interpolate a w value for a given q value based on a given discharge table.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 328
diff changeset
199
378
20c3a5b36434 Repaired DischargeTables.getQForW()
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parents: 376
diff changeset
200 if (index < 1 || index >= values[0].length) {
329
0b2358bc716d Discharge table: Added static method getWForQ() to interpolate a w value for a given q value based on a given discharge table.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 328
diff changeset
201 // do not extraploate
378
20c3a5b36434 Repaired DischargeTables.getQForW()
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 376
diff changeset
202 if (debug) {
20c3a5b36434 Repaired DischargeTables.getQForW()
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parents: 376
diff changeset
203 log.debug("we do not extrapolate: NaN");
20c3a5b36434 Repaired DischargeTables.getQForW()
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 376
diff changeset
204 }
334
b7c8df643dc4 Discharge table: we need a getQForW() and not a getWForQ().
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 333
diff changeset
205 return Double.NaN;
329
0b2358bc716d Discharge table: Added static method getWForQ() to interpolate a w value for a given q value based on a given discharge table.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 328
diff changeset
206 }
0b2358bc716d Discharge table: Added static method getWForQ() to interpolate a w value for a given q value based on a given discharge table.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 328
diff changeset
207
735
db68806e6563 Fixed "W am Pegel" calculations.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 378
diff changeset
208 double w1 = values[1][index-1];
db68806e6563 Fixed "W am Pegel" calculations.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 378
diff changeset
209 double w2 = values[1][index ];
db68806e6563 Fixed "W am Pegel" calculations.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 378
diff changeset
210 double q1 = values[0][index-1];
db68806e6563 Fixed "W am Pegel" calculations.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 378
diff changeset
211 double q2 = values[0][index ];
329
0b2358bc716d Discharge table: Added static method getWForQ() to interpolate a w value for a given q value based on a given discharge table.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 328
diff changeset
212
334
b7c8df643dc4 Discharge table: we need a getQForW() and not a getWForQ().
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 333
diff changeset
213 // q1 = m*w1 + b
b7c8df643dc4 Discharge table: we need a getQForW() and not a getWForQ().
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 333
diff changeset
214 // q2 = m*w2 + b
b7c8df643dc4 Discharge table: we need a getQForW() and not a getWForQ().
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 333
diff changeset
215 // q2 - q1 = m*(w2 - w1)
b7c8df643dc4 Discharge table: we need a getQForW() and not a getWForQ().
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 333
diff changeset
216 // m = (q2 - q1)/(w2 - w1) # w2 != w1
b7c8df643dc4 Discharge table: we need a getQForW() and not a getWForQ().
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 333
diff changeset
217 // b = q1 - m*w1
329
0b2358bc716d Discharge table: Added static method getWForQ() to interpolate a w value for a given q value based on a given discharge table.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 328
diff changeset
218
378
20c3a5b36434 Repaired DischargeTables.getQForW()
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 376
diff changeset
219 double q;
334
b7c8df643dc4 Discharge table: we need a getQForW() and not a getWForQ().
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 333
diff changeset
220 if (w1 == w2) {
378
20c3a5b36434 Repaired DischargeTables.getQForW()
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 376
diff changeset
221 q = 0.5*(q1 + q2);
20c3a5b36434 Repaired DischargeTables.getQForW()
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 376
diff changeset
222 if (debug) {
1929
6b0ae0f2cae6 (Minor) cosmetics, docs.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 735
diff changeset
223 log.debug("same w1 and w2: " + w1);
378
20c3a5b36434 Repaired DischargeTables.getQForW()
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 376
diff changeset
224 }
329
0b2358bc716d Discharge table: Added static method getWForQ() to interpolate a w value for a given q value based on a given discharge table.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 328
diff changeset
225 }
378
20c3a5b36434 Repaired DischargeTables.getQForW()
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 376
diff changeset
226 else {
20c3a5b36434 Repaired DischargeTables.getQForW()
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 376
diff changeset
227 double m = (q2 - q1)/(w2 - w1);
20c3a5b36434 Repaired DischargeTables.getQForW()
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 376
diff changeset
228 double b = q1 - m*w1;
20c3a5b36434 Repaired DischargeTables.getQForW()
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 376
diff changeset
229 q = w*m + b;
20c3a5b36434 Repaired DischargeTables.getQForW()
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 376
diff changeset
230 }
20c3a5b36434 Repaired DischargeTables.getQForW()
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 376
diff changeset
231 if (debug) {
20c3a5b36434 Repaired DischargeTables.getQForW()
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 376
diff changeset
232 log.debug("Q(" + w + ") = " + q);
20c3a5b36434 Repaired DischargeTables.getQForW()
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 376
diff changeset
233 }
20c3a5b36434 Repaired DischargeTables.getQForW()
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 376
diff changeset
234 return q;
329
0b2358bc716d Discharge table: Added static method getWForQ() to interpolate a w value for a given q value based on a given discharge table.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 328
diff changeset
235 }
146
e8dfe6ba2000 Fetch w/q values of discharge tables for given gauges.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
236 }
e8dfe6ba2000 Fetch w/q values of discharge tables for given gauges.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
237 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
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