Mercurial > dive4elements > river

annotate flys-backend/src/main/java/de/intevation/flys/model/River.java @ 768:87ac543c7ab9

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When looking up a gauge by km containment use precision of 1e-6. flys-backend/trunk@2232 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Sun, 26 Jun 2011 12:16:36 +0000
parents 5572d051347e
children 321b9e480f72
rev   line source
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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;
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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.JoinColumn;
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16 import javax.persistence.GenerationType;
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17
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18 import java.util.List;
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19
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20 import org.hibernate.Session;
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21 import org.hibernate.Query;
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22
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23 import de.intevation.flys.backend.SessionHolder;
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24
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25
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26 @Entity
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27 @Table(name = "rivers")
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28 public class River
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29 implements Serializable
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30 {
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31 public static final MathContext PRECISION = new MathContext(6);
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32
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33 private Integer id;
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34
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35 private String name;
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36
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37 private boolean kmUp;
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38
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39 private List<Gauge> gauges;
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40
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41 @Id
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42 @SequenceGenerator(
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43 name = "SEQUENCE_RIVERS_ID_SEQ",
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44 sequenceName = "RIVERS_ID_SEQ",
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45 allocationSize = 1)
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46 @GeneratedValue(
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47 strategy = GenerationType.SEQUENCE,
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48 generator = "SEQUENCE_RIVERS_ID_SEQ")
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49 @Column(name = "id")
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50 public Integer getId() {
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51 return id;
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52 }
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53
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54 public void setId(Integer id) {
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55 this.id = id;
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56 }
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57
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58 @Column(name = "name")
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59 public String getName() {
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60 return name;
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61 }
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62
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63 public void setName(String name) {
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64 this.name = name;
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65 }
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66
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67 @Column(name = "km_up")
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68 public boolean getKmUp() {
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69 return kmUp;
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70 }
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71
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72 public void setKmUp(boolean kmUp) {
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73 this.kmUp = kmUp;
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74 }
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75
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76 public River() {
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77 }
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78
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79 public River(String name) {
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80 this.name = name;
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81 }
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82
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83 @OneToMany
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84 @JoinColumn(name="river_id")
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85 public List<Gauge> getGauges() {
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86 return gauges;
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87 }
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88
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89 public void setGauges(List<Gauge> gauges) {
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90 this.gauges = gauges;
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91 }
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92
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93 public String toString() {
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94 return name != null ? name : "";
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95 }
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96
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97
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98 /**
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99 * This method returns the gauges that intersect with <i>a</i> and
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100 * <i>b</i>,
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101 *
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102 * @param a A start point.
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103 * @param b An end point.
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104 *
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105 * @return the intersecting gauges.
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106 */
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107 public List<Gauge> determineGauges(double a, double b) {
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108 Session session = SessionHolder.HOLDER.get();
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109
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110 if (a > b) { double t = a; a = b; b = t; }
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111
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112 Query query = session.createQuery(
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113 "from Gauge where river=:river " +
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114 "and not (range.a > :b or range.b < :a) order by a");
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115 query.setParameter("river", this);
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116 query.setParameter("a", new BigDecimal(a));
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117 query.setParameter("b", new BigDecimal(b));
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118
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119 return query.list();
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120 }
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121
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122 public Gauge determineGaugeByName(String name) {
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123 Session session = SessionHolder.HOLDER.get();
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124 Query query = session.createQuery(
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125 "from Gauge where river=:river and name=:name");
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126 query.setParameter("river", this);
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127 query.setParameter("name", name);
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128 List<Gauge> gauges = query.list();
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129 return gauges.isEmpty() ? null : gauges.get(0);
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130 }
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131
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132 public Gauge determineGaugeByPosition(double p) {
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133 Session session = SessionHolder.HOLDER.get();
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134 Query query = session.createQuery(
768
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135 "from Gauge g where river=:river " +
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136 "and :p between g.range.a and g.range.b");
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137 query.setParameter("river", this);
768
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138 query.setParameter("p", new BigDecimal(p, PRECISION));
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139 List<Gauge> gauges = query.list();
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140 return gauges.isEmpty() ? null : gauges.get(0);
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141 }
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142
757
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143 public Gauge determineGaugeByStation(double a, double b) {
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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 Session session = SessionHolder.HOLDER.get();
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148
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149 Query query = session.createQuery(
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150 "from Gauge where river.id=:river " +
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151 "and station between :a and :b");
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152 query.setParameter("river", getId());
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153 query.setParameter("a", new BigDecimal(a));
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154 query.setParameter("b", new BigDecimal(b));
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155
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156 List<Gauge> gauges = query.list();
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157 return gauges.isEmpty() ? null : gauges.get(0);
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158 }
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159
488
b316d2106598 River got a new method that returns all gauges intersected by a given start and end point.
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160
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161 /**
472
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162 * This method returns the first gauge that is intersected by <i>a</i> and
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163 * <i>b</i>,
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164 *
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165 * @param a A start point.
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166 * @param b An end point.
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167 *
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168 * @return the first intersecting gauge.
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169 */
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170 public Gauge determineGauge(double a, double b) {
488
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171 List<Gauge> gauges = determineGauges(a, b);
472
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172
756
ca13926b8871 River: Make search for gauges independent of from/to order.
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173 return gauges.isEmpty() ? null : gauges.get(0);
472
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174 }
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diff changeset
175
465
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176 /**
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177 * Returns the min and max distance of this river. The first position in the
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178 * resulting array contains the min distance, the second position the max
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179 * distance.
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180 *
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181 * @return the min and max distance of this river.
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182 */
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183 public double[] determineMinMaxDistance() {
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184 if (gauges == null) {
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185 return null;
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186 }
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187
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188 double minmax[] = new double[] { Double.MAX_VALUE, Double.MIN_VALUE };
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189
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diff changeset
190 for (Gauge g: gauges) {
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diff changeset
191 Range r = g.getRange();
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192
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diff changeset
193 double a = r.getA().doubleValue();
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diff changeset
194 minmax[0] = minmax[0] < a ? minmax[0] : a;
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195
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diff changeset
196 BigDecimal bigB = r.getB();
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diff changeset
197 if (bigB != null) {
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diff changeset
198 double b = bigB.doubleValue();
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diff changeset
199 minmax[1] = minmax[1] > b ? minmax[1] : b;
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parents: 188
diff changeset
200 }
c2c3ad4fda58 Added a method to River that returns the min and max distance of the river.
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parents: 188
diff changeset
201 }
c2c3ad4fda58 Added a method to River that returns the min and max distance of the river.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 188
diff changeset
202
c2c3ad4fda58 Added a method to River that returns the min and max distance of the river.
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diff changeset
203 return minmax;
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diff changeset
204 }
167
15d515fe15f5 Added POJOs to be mapped to schema.
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parents:
diff changeset
205 }
15d515fe15f5 Added POJOs to be mapped to schema.
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parents:
diff changeset
206 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org