Mercurial > dive4elements > river
annotate flys-backend/src/main/java/de/intevation/flys/model/River.java @ 2373:056b3a5aa181
Removed "NOT NULL" constraint from gauges.range_id because there are gauges which dont have a Gueltigkeitsbereich.
flys-backend/trunk@3564 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Mon, 02 Jan 2012 13:42:27 +0000 |
parents | 0acf28a3d28a |
children | 6605dcd6745f |
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1 package de.intevation.flys.model; |
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2 |
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3 import java.io.Serializable; |
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4 |
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5 import java.math.BigDecimal; |
768 | 6 import java.math.MathContext; |
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7 |
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8 import javax.persistence.Entity; |
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9 import javax.persistence.Id; |
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10 import javax.persistence.Table; |
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11 import javax.persistence.GeneratedValue; |
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12 import javax.persistence.Column; |
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13 import javax.persistence.SequenceGenerator; |
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14 import javax.persistence.OneToMany; |
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15 import javax.persistence.OneToOne; |
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16 import javax.persistence.JoinColumn; |
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17 import javax.persistence.GenerationType; |
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18 |
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19 import java.util.List; |
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20 |
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Added a new method to determine the selected gauge of a river based on a start and end point.
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21 import org.hibernate.Session; |
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22 import org.hibernate.Query; |
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23 |
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24 import de.intevation.flys.backend.SessionHolder; |
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25 |
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26 |
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27 @Entity |
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28 @Table(name = "rivers") |
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29 public class River |
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30 implements Serializable |
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31 { |
768 | 32 public static final MathContext PRECISION = new MathContext(6); |
33 | |
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34 private Integer id; |
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35 |
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36 private String name; |
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37 |
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38 private boolean kmUp; |
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39 |
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40 private List<Gauge> gauges; |
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41 |
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42 private Unit wstUnit; |
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43 |
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44 @Id |
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45 @SequenceGenerator( |
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46 name = "SEQUENCE_RIVERS_ID_SEQ", |
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47 sequenceName = "RIVERS_ID_SEQ", |
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48 allocationSize = 1) |
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49 @GeneratedValue( |
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50 strategy = GenerationType.SEQUENCE, |
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51 generator = "SEQUENCE_RIVERS_ID_SEQ") |
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52 @Column(name = "id") |
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53 public Integer getId() { |
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54 return id; |
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55 } |
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56 |
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57 public void setId(Integer id) { |
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58 this.id = id; |
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59 } |
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60 |
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61 @Column(name = "name") |
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62 public String getName() { |
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63 return name; |
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64 } |
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65 |
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66 public void setName(String name) { |
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67 this.name = name; |
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68 } |
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69 |
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70 @Column(name = "km_up") |
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71 public boolean getKmUp() { |
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72 return kmUp; |
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73 } |
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74 |
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75 public void setKmUp(boolean kmUp) { |
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76 this.kmUp = kmUp; |
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77 } |
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78 |
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79 public River() { |
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80 } |
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81 |
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82 public River(String name, Unit wstUnit) { |
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83 this.name = name; |
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84 this.wstUnit = wstUnit; |
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85 } |
174
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86 |
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87 @OneToMany |
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88 @JoinColumn(name="river_id") |
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89 public List<Gauge> getGauges() { |
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90 return gauges; |
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91 } |
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92 |
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93 public void setGauges(List<Gauge> gauges) { |
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94 this.gauges = gauges; |
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95 } |
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96 |
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97 |
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98 @OneToOne |
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99 @JoinColumn(name = "wst_unit_id" ) |
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100 public Unit getWstUnit() { |
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101 return wstUnit; |
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102 } |
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103 |
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104 public void setWstUnit(Unit wstUnit) { |
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105 this.wstUnit = wstUnit; |
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106 } |
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107 |
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108 |
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109 |
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110 public String toString() { |
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111 return name != null ? name : ""; |
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112 } |
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113 |
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114 |
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115 /** |
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116 * This method returns the gauges that intersect with <i>a</i> and |
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117 * <i>b</i>, |
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118 * |
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119 * @param a A start point. |
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120 * @param b An end point. |
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121 * |
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122 * @return the intersecting gauges. |
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123 */ |
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124 public List<Gauge> determineGauges(double a, double b) { |
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125 Session session = SessionHolder.HOLDER.get(); |
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126 |
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127 if (a > b) { double t = a; a = b; b = t; } |
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128 |
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129 Query query = session.createQuery( |
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130 "from Gauge where river=:river " + |
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131 "and not (range.a > :b or range.b < :a) order by a"); |
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132 query.setParameter("river", this); |
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133 query.setParameter("a", new BigDecimal(a, PRECISION)); |
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134 query.setParameter("b", new BigDecimal(b, PRECISION)); |
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135 |
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136 return query.list(); |
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137 } |
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138 |
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139 public Gauge maxOverlap(double a, double b) { |
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140 List<Gauge> gauges = determineGauges(a, b); |
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141 if (gauges == null) { |
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142 return null; |
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143 } |
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144 |
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145 if (a > b) { double t = a; a = b; b = t; } |
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146 |
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147 double max = -Double.MAX_VALUE; |
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148 |
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149 Gauge result = null; |
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150 |
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151 for (Gauge gauge: gauges) { |
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152 Range r = gauge.getRange(); |
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153 double c = r.getA().doubleValue(); |
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154 double d = r.getB().doubleValue(); |
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155 |
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156 double start = c >= a ? c : a; |
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157 double stop = d <= b ? d : b; |
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158 |
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159 double length = stop - start; |
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160 |
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161 if (length > max) { |
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162 max = length; |
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163 result = gauge; |
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164 } |
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165 } |
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166 |
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167 return result; |
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168 } |
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169 |
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170 public Gauge determineGaugeByName(String name) { |
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171 Session session = SessionHolder.HOLDER.get(); |
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172 Query query = session.createQuery( |
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173 "from Gauge where river=:river and name=:name"); |
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174 query.setParameter("river", this); |
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175 query.setParameter("name", name); |
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176 List<Gauge> gauges = query.list(); |
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177 return gauges.isEmpty() ? null : gauges.get(0); |
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178 } |
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179 |
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180 public Gauge determineGaugeByPosition(double p) { |
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181 Session session = SessionHolder.HOLDER.get(); |
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182 Query query = session.createQuery( |
768 | 183 "from Gauge g where river=:river " + |
184 "and :p between g.range.a and g.range.b"); | |
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185 query.setParameter("river", this); |
768 | 186 query.setParameter("p", new BigDecimal(p, PRECISION)); |
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187 List<Gauge> gauges = query.list(); |
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188 return gauges.isEmpty() ? null : gauges.get(0); |
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189 } |
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190 |
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191 public Gauge determineGaugeByStation(double a, double b) { |
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192 |
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193 if (a > b) { double t = a; a = b; b = t; } |
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194 |
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195 Session session = SessionHolder.HOLDER.get(); |
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196 |
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197 Query query = session.createQuery( |
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198 "from Gauge where river.id=:river " + |
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199 "and station between :a and :b"); |
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200 query.setParameter("river", getId()); |
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201 query.setParameter("a", new BigDecimal(a)); |
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202 query.setParameter("b", new BigDecimal(b)); |
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203 |
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204 List<Gauge> gauges = query.list(); |
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205 return gauges.isEmpty() ? null : gauges.get(0); |
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206 } |
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207 |
488
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208 |
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209 /** |
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210 * This method returns the first gauge that is intersected by <i>a</i> and |
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211 * <i>b</i>, |
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212 * |
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213 * @param a A start point. |
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214 * @param b An end point. |
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215 * |
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216 * @return the first intersecting gauge. |
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217 */ |
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218 public Gauge determineGauge(double a, double b) { |
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219 List<Gauge> gauges = determineGauges(a, b); |
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220 |
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221 int idx = a < b ? 0 : gauges.size() - 1; |
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222 |
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223 return gauges.isEmpty() ? null : gauges.get(idx); |
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224 } |
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225 |
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226 /** |
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227 * Returns the min and max distance of this river. The first position in the |
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228 * resulting array contains the min distance, the second position the max |
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229 * distance. |
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230 * |
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231 * @return the min and max distance of this river. |
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232 */ |
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233 public double[] determineMinMaxDistance() { |
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234 List<Gauge> gauges = getGauges(); |
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235 |
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236 if (gauges == null || gauges.isEmpty()) { |
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237 return null; |
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238 } |
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239 |
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240 double minmax[] = new double[] { Double.MAX_VALUE, Double.MIN_VALUE }; |
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241 |
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242 for (Gauge g: gauges) { |
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243 Range r = g.getRange(); |
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244 |
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245 if (r == null) { |
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246 continue; |
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247 } |
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248 |
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249 double a = r.getA().doubleValue(); |
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250 minmax[0] = minmax[0] < a ? minmax[0] : a; |
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251 |
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252 BigDecimal bigB = r.getB(); |
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253 if (bigB != null) { |
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254 double b = bigB.doubleValue(); |
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255 minmax[1] = minmax[1] > b ? minmax[1] : b; |
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256 } |
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257 } |
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258 |
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259 return minmax; |
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260 } |
167
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261 } |
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262 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |