Mercurial > dive4elements > river
annotate backend/src/main/java/org/dive4elements/river/model/CrossSection.java @ 6536:c155f8f57b7e
Initial improved query to find matching cross section.
author | Felix Wolfsteller <felix.wolfsteller@intevation.de> |
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date | Wed, 03 Jul 2013 16:09:51 +0200 |
parents | 44ee7d26eb18 |
children | de62db0f2035 |
rev | line source |
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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 @Entity |
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42 @Table(name = "cross_sections") |
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43 public class CrossSection |
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44 implements Serializable |
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45 { |
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46 public static final MathContext PRECISION = new MathContext(6); |
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47 |
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48 public static final String SQL_FAST_CROSS_SECTION_LINES = |
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49 "SELECT km, x, y, csl.id AS csl_id " + |
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50 "FROM cross_section_lines csl JOIN cross_section_points csp " + |
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51 "ON csp.cross_section_line_id = csl.id " + |
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52 "WHERE csl.cross_section_id = :cs_id AND " + |
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53 "km between :from_km AND :to_km " + |
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54 "ORDER BY csl.km, csl.id, csp.col_pos"; |
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55 |
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56 public static final String SQL_MIN_MAX = |
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57 "SELECT * FROM ( "+ |
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58 "SELECT cross_section_id, MIN(km) AS minkm, MAX(km) AS maxkm " + |
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59 "FROM cross_section_lines " + |
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60 "WHERE cross_section_id IN " + |
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61 " (SELECT id FROM cross_sections WHERE river_id = :river_id) " + |
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62 " GROUP BY cross_section_id" + |
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63 ") AS cs_ranges WHERE :km BETWEEN minkm AND maxkm ORDER BY :km - minkm "; |
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64 // Order by time interval missing. |
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65 |
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66 private Integer id; |
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67 private River river; |
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68 private TimeInterval timeInterval; |
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69 private String description; |
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70 private List<CrossSectionLine> lines; |
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71 |
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72 public CrossSection() { |
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73 } |
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74 |
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75 public CrossSection( |
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76 River river, |
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77 TimeInterval timeInterval, |
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78 String description |
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79 ) { |
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80 this.river = river; |
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81 this.timeInterval = timeInterval; |
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82 this.description = description; |
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83 } |
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84 |
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85 @Id |
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86 @SequenceGenerator( |
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87 name = "SEQUENCE_CROSS_SECTIONS_ID_SEQ", |
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88 sequenceName = "CROSS_SECTIONS_ID_SEQ", |
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89 allocationSize = 1) |
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90 @GeneratedValue( |
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91 strategy = GenerationType.SEQUENCE, |
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92 generator = "SEQUENCE_CROSS_SECTIONS_ID_SEQ") |
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93 @Column(name = "id") |
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94 public Integer getId() { |
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95 return id; |
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96 } |
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97 |
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98 public void setId(Integer id) { |
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99 this.id = id; |
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100 } |
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101 |
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102 @OneToOne |
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103 @JoinColumn(name = "river_id") |
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104 public River getRiver() { |
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105 return river; |
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106 } |
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107 |
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108 public void setRiver(River river) { |
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109 this.river = river; |
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110 } |
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111 |
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112 @OneToOne |
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113 @JoinColumn(name = "time_interval_id") |
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114 public TimeInterval getTimeInterval() { |
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115 return timeInterval; |
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116 } |
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117 |
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118 public void setTimeInterval(TimeInterval timeInterval) { |
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119 this.timeInterval = timeInterval; |
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120 } |
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121 |
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122 @Column(name = "description") |
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123 public String getDescription() { |
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124 return description; |
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125 } |
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126 |
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127 public void setDescription(String description) { |
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128 this.description = description; |
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129 } |
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130 |
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131 @OneToMany |
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132 @OrderBy("km") |
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133 @JoinColumn(name="cross_section_id") |
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134 public List<CrossSectionLine> getLines() { |
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135 return lines; |
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136 } |
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137 |
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138 public void setLines(List<CrossSectionLine> lines) { |
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139 this.lines = lines; |
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140 } |
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141 |
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142 public List<CrossSectionLine> getLines(double startKm, double endKm) { |
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143 Session session = SessionHolder.HOLDER.get(); |
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144 Query query = session.createQuery( |
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145 "from CrossSectionLine where crossSection=:crossSection " + |
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146 "and km between :startKm and :endKm order by km"); |
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147 query.setParameter("crossSection", this); |
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148 query.setParameter("startKm", new BigDecimal(startKm, PRECISION)); |
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149 query.setParameter("endKm", new BigDecimal(endKm, PRECISION)); |
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150 |
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151 return query.list(); |
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152 } |
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153 |
6269 | 154 /** Get Lines from startkm to endkm, fast because direct usage of sql. */ |
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155 public List<FastCrossSectionLine> getFastLines( |
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156 double startKm, |
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157 double endKm |
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158 ) { |
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159 Session session = SessionHolder.HOLDER.get(); |
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160 |
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161 SQLQuery sqlQuery = session.createSQLQuery(SQL_FAST_CROSS_SECTION_LINES) |
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162 .addScalar("km", StandardBasicTypes.DOUBLE) |
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163 .addScalar("x", StandardBasicTypes.DOUBLE) |
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164 .addScalar("y", StandardBasicTypes.DOUBLE) |
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165 .addScalar("csl_id", StandardBasicTypes.INTEGER); |
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166 |
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167 sqlQuery |
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168 .setInteger("cs_id", getId()) |
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169 .setDouble("from_km", startKm) |
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170 .setDouble("to_km", endKm); |
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171 |
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172 List<Object []> results = sqlQuery.list(); |
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173 |
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174 ArrayList<Point2D> points = new ArrayList<Point2D>(500); |
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175 ArrayList<FastCrossSectionLine> lines = |
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176 new ArrayList<FastCrossSectionLine>(); |
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177 |
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178 Integer lastId = null; |
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179 Double lastKm = null; |
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180 |
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181 for (Object [] result: results) { |
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182 Double km = (Double)result[0]; |
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183 Double x = (Double)result[1]; |
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184 Double y = (Double)result[2]; |
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185 Integer id = (Integer)result[3]; |
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186 |
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187 if (lastId != null && !lastId.equals(id)) { |
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188 points.trimToSize(); |
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189 FastCrossSectionLine line = |
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190 new FastCrossSectionLine(lastKm, points); |
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191 lines.add(line); |
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192 points = new ArrayList<Point2D>(500); |
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193 } |
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194 |
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195 Point2D p = new Point2D.Double(x, y); |
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196 |
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197 if (CrossSectionLine.isValid(p)) { |
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198 points.add(p); |
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199 } |
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200 |
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201 lastKm = km; |
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202 lastId = id; |
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203 } |
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204 |
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205 if (lastId != null) { |
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206 points.trimToSize(); |
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207 FastCrossSectionLine line = |
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208 new FastCrossSectionLine(lastKm, points); |
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209 lines.add(line); |
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210 } |
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211 |
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212 lines.trimToSize(); |
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213 |
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214 return lines; |
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215 } |
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216 } |
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217 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |