Mercurial > dive4elements > river

annotate flys-backend/src/main/java/de/intevation/flys/model/CrossSection.java @ 5407:db5def5456ce

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author Andre Heinecke <aheinecke@intevation.de>
date Mon, 25 Mar 2013 17:00:37 +0100
parents 2ae732e2c65c
children
rev   line source
1194
491892931761 Added Hibernate models for cross-sections and their points.
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diff changeset
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.util.List;
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6 import java.util.ArrayList;
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7
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8 import java.awt.geom.Point2D;
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9
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10 import javax.persistence.Entity;
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11 import javax.persistence.Id;
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12 import javax.persistence.Table;
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13 import javax.persistence.GeneratedValue;
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14 import javax.persistence.Column;
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15 import javax.persistence.SequenceGenerator;
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16 import javax.persistence.GenerationType;
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17 import javax.persistence.OneToOne;
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18 import javax.persistence.OneToMany;
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19 import javax.persistence.OrderBy;
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20 import javax.persistence.JoinColumn;
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21
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22 import java.math.MathContext;
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23 import java.math.BigDecimal;
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24
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25 import org.hibernate.Session;
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26 import org.hibernate.SQLQuery;
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27 import org.hibernate.Query;
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28
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29 import org.hibernate.type.StandardBasicTypes;
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30
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31 import de.intevation.flys.backend.SessionHolder;
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32
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33 @Entity
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34 @Table(name = "cross_sections")
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35 public class CrossSection
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36 implements Serializable
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37 {
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38 public static final MathContext PRECISION = new MathContext(6);
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39
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40 public static final String SQL_FAST_CROSS_SECTION_LINES =
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41 "SELECT km, x, y, csl.id AS csl_id " +
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42 "FROM cross_section_lines csl JOIN cross_section_points csp " +
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43 "ON csp.cross_section_line_id = csl.id " +
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44 "WHERE csl.cross_section_id = :cs_id AND " +
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45 "km between :from_km AND :to_km " +
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46 "ORDER BY csl.id, csp.col_pos";
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47
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48 private Integer id;
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49 private River river;
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50 private TimeInterval timeInterval;
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51 private String description;
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52 private List<CrossSectionLine> lines;
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53
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54 public CrossSection() {
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55 }
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56
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57 public CrossSection(
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58 River river,
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59 TimeInterval timeInterval,
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60 String description
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61 ) {
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62 this.river = river;
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63 this.timeInterval = timeInterval;
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64 this.description = description;
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65 }
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66
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67 @Id
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68 @SequenceGenerator(
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69 name = "SEQUENCE_CROSS_SECTIONS_ID_SEQ",
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70 sequenceName = "CROSS_SECTIONS_ID_SEQ",
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71 allocationSize = 1)
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72 @GeneratedValue(
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73 strategy = GenerationType.SEQUENCE,
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74 generator = "SEQUENCE_CROSS_SECTIONS_ID_SEQ")
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75 @Column(name = "id")
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76 public Integer getId() {
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77 return id;
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78 }
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79
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80 public void setId(Integer id) {
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81 this.id = id;
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82 }
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83
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84 @OneToOne
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85 @JoinColumn(name = "river_id")
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86 public River getRiver() {
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87 return river;
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88 }
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89
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90 public void setRiver(River river) {
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91 this.river = river;
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92 }
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93
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94 @OneToOne
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95 @JoinColumn(name = "time_interval_id")
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96 public TimeInterval getTimeInterval() {
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97 return timeInterval;
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98 }
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99
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100 public void setTimeInterval(TimeInterval timeInterval) {
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101 this.timeInterval = timeInterval;
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102 }
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103
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104 @Column(name = "description")
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105 public String getDescription() {
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106 return description;
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107 }
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108
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109 public void setDescription(String description) {
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110 this.description = description;
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111 }
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112
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113 @OneToMany
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114 @OrderBy("km")
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115 @JoinColumn(name="cross_section_id")
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116 public List<CrossSectionLine> getLines() {
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117 return lines;
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118 }
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119
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120 public void setLines(List<CrossSectionLine> lines) {
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121 this.lines = lines;
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122 }
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123
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124 public List<CrossSectionLine> getLines(double startKm, double endKm) {
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125 Session session = SessionHolder.HOLDER.get();
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126 Query query = session.createQuery(
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127 "from CrossSectionLine where crossSection=:crossSection " +
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128 "and km between :startKm and :endKm order by km");
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129 query.setParameter("crossSection", this);
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130 query.setParameter("startKm", new BigDecimal(startKm, PRECISION));
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131 query.setParameter("endKm", new BigDecimal(endKm, PRECISION));
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132
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133 return query.list();
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134 }
2380
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135
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136 public List<FastCrossSectionLine> getFastLines(
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137 double startKm,
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138 double endKm
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139 ) {
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140 Session session = SessionHolder.HOLDER.get();
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141
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142 SQLQuery sqlQuery = session.createSQLQuery(SQL_FAST_CROSS_SECTION_LINES)
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143 .addScalar("km", StandardBasicTypes.DOUBLE)
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144 .addScalar("x", StandardBasicTypes.DOUBLE)
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145 .addScalar("y", StandardBasicTypes.DOUBLE)
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146 .addScalar("csl_id", StandardBasicTypes.INTEGER);
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147
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148 sqlQuery
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149 .setInteger("cs_id", getId())
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150 .setDouble("from_km", startKm)
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151 .setDouble("to_km", endKm);
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152
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153 List<Object []> results = sqlQuery.list();
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154
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155 ArrayList<Point2D> points = new ArrayList<Point2D>(500);
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156 ArrayList<FastCrossSectionLine> lines =
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157 new ArrayList<FastCrossSectionLine>();
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158
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159 Integer lastId = null;
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160 Double lastKm = null;
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161
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162 for (Object [] result: results) {
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163 Double km = (Double)result[0];
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164 Double x = (Double)result[1];
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165 Double y = (Double)result[2];
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166 Integer id = (Integer)result[3];
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167
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168 if (lastId != null && !lastId.equals(id)) {
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169 points.trimToSize();
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170 FastCrossSectionLine line =
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171 new FastCrossSectionLine(lastKm, points);
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172 lines.add(line);
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173 points = new ArrayList<Point2D>(500);
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174 }
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175
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176 Point2D p = new Point2D.Double(x, y);
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177
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178 if (CrossSectionLine.isValid(p)) {
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179 points.add(p);
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180 }
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181
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182 lastKm = km;
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183 lastId = id;
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184 }
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185
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186 if (lastId != null) {
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187 points.trimToSize();
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188 FastCrossSectionLine line =
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189 new FastCrossSectionLine(lastKm, points);
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190 lines.add(line);
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191 }
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192
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193 lines.trimToSize();
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194
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195 return lines;
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196 }
1194
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197 }
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198 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org