annotate flys-backend/src/main/java/de/intevation/flys/model/CrossSectionLine.java @ 2360:9df06b88c079

Added model class for relation 'river_axes_km'. flys-backend/trunk@3133 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Tue, 01 Nov 2011 15:30:38 +0000
parents 3efc3942b765
children c5d83366d0b1
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
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7 import java.util.ArrayList;
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8 import java.util.List;
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9 import java.util.Collections;
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10 import java.util.Comparator;
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11
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12 import java.awt.geom.Point2D;
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13
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14 import javax.persistence.Entity;
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15 import javax.persistence.Id;
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16 import javax.persistence.Table;
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17 import javax.persistence.GeneratedValue;
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18 import javax.persistence.Column;
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19 import javax.persistence.SequenceGenerator;
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20 import javax.persistence.GenerationType;
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21 import javax.persistence.OneToOne;
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22 import javax.persistence.OneToMany;
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23 import javax.persistence.JoinColumn;
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25 import org.apache.log4j.Logger;
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27 @Entity
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28 @Table(name = "cross_section_lines")
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29 public class CrossSectionLine
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30 implements Serializable
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31 {
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32 private static Logger logger = Logger.getLogger(CrossSectionLine.class);
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33
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34 public static final double EPSILON = 1e-4;
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35
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36 public static final double TOO_SMALL = 0.2;
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37 public static final double TOO_BIG = 500;
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39 private Integer id;
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40 private BigDecimal km;
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41 private CrossSection crossSection;
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43 private List<CrossSectionPoint> points;
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45 public static final Comparator<CrossSectionPoint> COL_POS_CMP =
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46 new Comparator<CrossSectionPoint>() {
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47 @Override
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48 public int compare(CrossSectionPoint a, CrossSectionPoint b) {
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49 double xa = a.getX().doubleValue();
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50 double xb = b.getX().doubleValue();
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51 double d = xa - xb;
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52 if (d < -EPSILON) return -1;
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53 if (d > +EPSILON) return +1;
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54 int diff = a.getColPos() - b.getColPos();
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55 return diff < 0 ? -1 : diff > 0 ? +1 : 0;
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56 }
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57 };
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58
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59
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60 public static final boolean isValid(double x) {
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61 x = Math.abs(x);
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62 return x > TOO_SMALL && x < TOO_BIG;
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63 }
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64
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65
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66 public CrossSectionLine() {
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67 }
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68
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69 public CrossSectionLine(CrossSection crossSection, BigDecimal km) {
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70 this.crossSection = crossSection;
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71 this.km = km;
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72 }
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73
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74 @Id
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75 @SequenceGenerator(
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76 name = "SEQUENCE_CROSS_SECTION_LINES_ID_SEQ",
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77 sequenceName = "CROSS_SECTION_LINES_ID_SEQ",
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78 allocationSize = 1)
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79 @GeneratedValue(
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80 strategy = GenerationType.SEQUENCE,
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81 generator = "SEQUENCE_CROSS_SECTION_LINES_ID_SEQ")
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82 @Column(name = "id")
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83 public Integer getId() {
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84 return id;
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85 }
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86
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87 public void setId(Integer id) {
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88 this.id = id;
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89 }
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90
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91 @Column(name = "km")
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92 public BigDecimal getKm() {
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93 return km;
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94 }
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95
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96 public void setKm(BigDecimal km) {
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97 this.km = km;
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98 }
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99
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100 @OneToOne
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101 @JoinColumn(name = "cross_section_id")
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102 public CrossSection getCrossSection() {
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103 return crossSection;
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104 }
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105
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106 public void setCrossSection(CrossSection CrossSection) {
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107 this.crossSection = crossSection;
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108 }
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109
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110 @OneToMany
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111 @JoinColumn(name="cross_section_line_id")
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112 public List<CrossSectionPoint> getPoints() {
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113 return points;
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114 }
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115
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116 public void setPoints(List<CrossSectionPoint> points) {
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117 this.points = points;
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118 }
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119
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120
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121 public List<Point2D> fetchCrossSectionLinesPoints() {
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122 List<Point2D> points = new ArrayList<Point2D>();
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123
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124 List<CrossSectionPoint> linePoints = getPoints();
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125
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126 if (linePoints.isEmpty()) {
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127 logger.info("No points in selected CrossSectionLine.");
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128 return points;
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129 }
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130
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131 linePoints = new ArrayList(linePoints);
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132 Collections.sort(linePoints, COL_POS_CMP);
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133
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134 for (CrossSectionPoint p: linePoints) {
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135 double x = p.getX().doubleValue();
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136 double y = p.getY().doubleValue();
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137 if (isValid(x) && isValid(y)) {
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138 points.add(new Point2D.Double(x, y));
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139 }
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140 }
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141
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142 return points;
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143 }
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144
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145 public double [][] fetchCrossSectionProfile() {
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146 return fetchCrossSectionProfile(fetchCrossSectionLinesPoints());
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147 }
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148
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149 public static double [][] fetchCrossSectionProfile(List<Point2D> points) {
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150
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151 int P = points.size();
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152
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153 double [] xs = new double[P];
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154 double [] ys = new double[P];
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155
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156 if (P > 0) {
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157 xs[0] = points.get(0).getX();
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158 ys[0] = points.get(0).getY();
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159
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160 for (int i = 1; i < P; i++) {
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161 Point2D p = points.get(i);
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162 double x = p.getX();
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163 double y = p.getY();
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164
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165 if (x <= xs[i-1]) {
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166 x = xs[i-1] + EPSILON;
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167 }
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168
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169 xs[i] = x;
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170 ys[i] = y;
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171 }
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172 }
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173
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174 return new double [][] { xs, ys };
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175 }
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176 }
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177 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :

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