Mercurial > dive4elements > river

annotate backend/src/main/java/org/dive4elements/river/model/CrossSection.java @ 8029:cdb9f6d97f6a

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Added method to importer session to fetch the measurement station for given (river, km).
author Sascha L. Teichmann <teichmann@intevation.de>
date Thu, 10 Jul 2014 18:02:08 +0200
parents b9633d6ce57e
children 9d2e69f971f5
rev   line source
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4dd33b86dc61 Added header to river backend.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 5838
diff changeset
1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
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2 * Software engineering by Intevation GmbH
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3 *
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4 * This file is Free Software under the GNU AGPL (>=v3)
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the
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6 * documentation coming with Dive4Elements River for details.
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7 */
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8
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9 package org.dive4elements.river.model;
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10
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11 import java.io.Serializable;
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12
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13 import java.util.List;
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14 import java.util.ArrayList;
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15
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16 import java.awt.geom.Point2D;
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17
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18 import javax.persistence.Entity;
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19 import javax.persistence.Id;
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20 import javax.persistence.Table;
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21 import javax.persistence.GeneratedValue;
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22 import javax.persistence.Column;
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23 import javax.persistence.SequenceGenerator;
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24 import javax.persistence.GenerationType;
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25 import javax.persistence.OneToOne;
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26 import javax.persistence.OneToMany;
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27 import javax.persistence.OrderBy;
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28 import javax.persistence.JoinColumn;
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29
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30 import java.math.MathContext;
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31 import java.math.BigDecimal;
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32
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33 import org.hibernate.Session;
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34 import org.hibernate.SQLQuery;
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35 import org.hibernate.Query;
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36
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37 import org.hibernate.type.StandardBasicTypes;
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38
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39 import org.dive4elements.river.backend.SessionHolder;
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40
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41 import org.apache.log4j.Logger;
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42
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43 @Entity
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44 @Table(name = "cross_sections")
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45 public class CrossSection
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46 implements Serializable
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47 {
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48 private static Logger logger =
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49 Logger.getLogger(CrossSection.class);
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50
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51 public static final MathContext PRECISION = new MathContext(6);
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52
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53 public static final String SQL_FAST_CROSS_SECTION_LINES =
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54 "SELECT km, x, y, csl.id AS csl_id " +
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55 "FROM cross_section_lines csl JOIN cross_section_points csp " +
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56 "ON csp.cross_section_line_id = csl.id " +
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57 "WHERE csl.cross_section_id = :cs_id AND " +
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58 "km between :from_km AND :to_km " +
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59 "ORDER BY csl.km, csl.id, csp.col_pos";
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60
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61 public static final String SQL_MIN_MAX =
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62 "SELECT * FROM ( "+
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63 "SELECT cross_section_id, MIN(km) AS minkm, MAX(km) AS maxkm " +
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64 "FROM cross_section_lines " +
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65 "WHERE cross_section_id IN " +
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66 " (SELECT id FROM cross_sections WHERE river_id = :river_id) " +
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67 " GROUP BY cross_section_id" +
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68 ") cs_ranges " +
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69 "JOIN cross_sections cs ON cs_ranges.cross_section_id = cs.id " +
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70 "LEFT OUTER JOIN time_intervals ON cs.time_interval_id = time_intervals.id " +
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71 "WHERE :km BETWEEN minkm AND maxkm " +
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72 "ORDER BY stop_time desc, start_time desc, :km - minkm";
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73 // Order by time interval missing.
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74
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75 private Integer id;
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76 private River river;
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77 private TimeInterval timeInterval;
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78 private String description;
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79 private List<CrossSectionLine> lines;
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80
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81 public CrossSection() {
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82 }
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83
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84 public CrossSection(
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85 River river,
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86 TimeInterval timeInterval,
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87 String description
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88 ) {
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89 this.river = river;
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90 this.timeInterval = timeInterval;
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91 this.description = description;
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92 }
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93
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94 @Id
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95 @SequenceGenerator(
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96 name = "SEQUENCE_CROSS_SECTIONS_ID_SEQ",
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97 sequenceName = "CROSS_SECTIONS_ID_SEQ",
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98 allocationSize = 1)
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99 @GeneratedValue(
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100 strategy = GenerationType.SEQUENCE,
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101 generator = "SEQUENCE_CROSS_SECTIONS_ID_SEQ")
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102 @Column(name = "id")
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103 public Integer getId() {
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104 return id;
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105 }
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106
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107 public void setId(Integer id) {
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108 this.id = id;
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109 }
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110
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111 @OneToOne
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112 @JoinColumn(name = "river_id")
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113 public River getRiver() {
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114 return river;
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115 }
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116
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117 public void setRiver(River river) {
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118 this.river = river;
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119 }
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120
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121 @OneToOne
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122 @JoinColumn(name = "time_interval_id")
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123 public TimeInterval getTimeInterval() {
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124 return timeInterval;
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125 }
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126
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127 public void setTimeInterval(TimeInterval timeInterval) {
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128 this.timeInterval = timeInterval;
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129 }
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130
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131 @Column(name = "description")
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132 public String getDescription() {
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133 return description;
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134 }
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135
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136 public void setDescription(String description) {
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137 this.description = description;
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138 }
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139
1194
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140 @OneToMany
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141 @OrderBy("km")
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142 @JoinColumn(name="cross_section_id")
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143 public List<CrossSectionLine> getLines() {
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144 return lines;
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145 }
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146
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147 public void setLines(List<CrossSectionLine> lines) {
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148 this.lines = lines;
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149 }
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150
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151 public List<CrossSectionLine> getLines(double startKm, double endKm) {
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152 Session session = SessionHolder.HOLDER.get();
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153 Query query = session.createQuery(
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154 "from CrossSectionLine where crossSection=:crossSection " +
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155 "and km between :startKm and :endKm order by km");
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156 query.setParameter("crossSection", this);
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157 query.setParameter("startKm", new BigDecimal(startKm, PRECISION));
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158 query.setParameter("endKm", new BigDecimal(endKm, PRECISION));
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159
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160 return query.list();
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161 }
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162
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163 /** Get Lines from startkm to endkm, fast because direct usage of sql. */
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164 public List<FastCrossSectionLine> getFastLines(
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165 double startKm,
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166 double endKm
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167 ) {
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168 Session session = SessionHolder.HOLDER.get();
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169
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170 SQLQuery sqlQuery = session.createSQLQuery(SQL_FAST_CROSS_SECTION_LINES)
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171 .addScalar("km", StandardBasicTypes.DOUBLE)
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172 .addScalar("x", StandardBasicTypes.DOUBLE)
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173 .addScalar("y", StandardBasicTypes.DOUBLE)
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174 .addScalar("csl_id", StandardBasicTypes.INTEGER);
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175
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176 sqlQuery
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177 .setInteger("cs_id", getId())
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178 .setDouble("from_km", startKm)
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179 .setDouble("to_km", endKm);
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180
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181 List<Object []> results = sqlQuery.list();
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182
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183 ArrayList<Point2D> points = new ArrayList<Point2D>(500);
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184 ArrayList<FastCrossSectionLine> lines =
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185 new ArrayList<FastCrossSectionLine>();
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186
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187 Integer lastId = null;
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188 Double lastKm = null;
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189
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190 for (Object [] result: results) {
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191 Double km = (Double)result[0];
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192 Double x = (Double)result[1];
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193 Double y = (Double)result[2];
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194 Integer id = (Integer)result[3];
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195
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196 if (lastId != null && !lastId.equals(id)) {
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197 points.trimToSize();
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198 FastCrossSectionLine line =
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199 new FastCrossSectionLine(lastKm, points);
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200 lines.add(line);
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201 points = new ArrayList<Point2D>(500);
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202 }
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203
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204 Point2D p = new Point2D.Double(x, y);
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205
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206 if (CrossSectionLine.isValid(p)) {
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207 points.add(p);
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208 }
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209
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210 lastKm = km;
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211 lastId = id;
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212 }
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213
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214 if (lastId != null) {
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215 points.trimToSize();
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216 FastCrossSectionLine line =
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217 new FastCrossSectionLine(lastKm, points);
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218 lines.add(line);
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219 }
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220
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221 lines.trimToSize();
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222
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223 return lines;
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224 }
6538
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225
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226 /**
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227 * True if the given section is the "newest" for that river and has values at km.
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228 * @param km Given station.
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229 * @return true if the section has the most advanced end of its validity interval
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230 * or the most advanced start of its validity interval.
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231 */
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232 public boolean shouldBeMaster(double km) {
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233 Session session = SessionHolder.HOLDER.get();
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234
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diff changeset
235 SQLQuery sqlQuery = session.createSQLQuery(SQL_MIN_MAX)
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236 .addScalar("cross_section_id", StandardBasicTypes.INTEGER);
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237
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238 sqlQuery
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239 .setInteger("river_id", getRiver().getId())
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240 .setDouble("km", km);
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241
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242 List<Integer> results = sqlQuery.list();
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243
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244 if (results.size() >= 1) {
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245 Integer result = results.get(0);
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246 if (result == getId()) {
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Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 6536
diff changeset
247 return true;
de62db0f2035 issue1157: Let CrossSection be able to find out whether it should be active & master.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 6536
diff changeset
248 }
de62db0f2035 issue1157: Let CrossSection be able to find out whether it should be active & master.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 6536
diff changeset
249 }
6852
d02ad36115c6 issue1157: Only look at the best match for CrossSections to activate.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 6622
diff changeset
250 else {
d02ad36115c6 issue1157: Only look at the best match for CrossSections to activate.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 6622
diff changeset
251 logger.warn("No CS found that could be master.");
d02ad36115c6 issue1157: Only look at the best match for CrossSections to activate.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 6622
diff changeset
252 }
d02ad36115c6 issue1157: Only look at the best match for CrossSections to activate.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 6622
diff changeset
253
d02ad36115c6 issue1157: Only look at the best match for CrossSections to activate.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 6622
diff changeset
254 // TODO If there is none, might need a fallback.
d02ad36115c6 issue1157: Only look at the best match for CrossSections to activate.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 6622
diff changeset
255 // Formerly this was the most current CS (issue1157).
d02ad36115c6 issue1157: Only look at the best match for CrossSections to activate.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 6622
diff changeset
256
6538
de62db0f2035 issue1157: Let CrossSection be able to find out whether it should be active & master.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 6536
diff changeset
257 return false;
de62db0f2035 issue1157: Let CrossSection be able to find out whether it should be active & master.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 6536
diff changeset
258 }
1194
491892931761 Added Hibernate models for cross-sections and their points.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
259 }
491892931761 Added Hibernate models for cross-sections and their points.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
260 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org