Mercurial > dive4elements > river

annotate backend/src/main/java/org/dive4elements/river/model/FastAnnotations.java @ 8406:6ae0c5116d58

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Distinguish between types of measurement stations and filter appropriately (plus minor cleanup in related classes).
author Tom Gottfried <tom@intevation.de>
date Tue, 14 Oct 2014 12:41:37 +0200
parents 4c3ccf2b0304
children 4809e23ffd27
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.util.Comparator;
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12 import java.util.ArrayList;
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13 import java.util.List;
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14 import java.util.Arrays;
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15 import java.util.HashMap;
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16 import java.util.Iterator;
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17 import java.util.NoSuchElementException;
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18 import java.util.regex.Pattern;
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19
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20 import java.io.Serializable;
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21
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22 import org.hibernate.Session;
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23 import org.hibernate.SQLQuery;
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24
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25 import org.hibernate.type.StandardBasicTypes;
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26
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27 import org.dive4elements.river.backend.SessionHolder;
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28
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29 public class FastAnnotations
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30 implements Serializable
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31 {
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32 public static final String SQL_BY_RIVER_NAME =
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33 "SELECT r.a AS a, r.b AS b, p.value AS position, " +
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34 "at.value AS attribute, ant.name AS name, " +
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35 "e.top AS top, e.bottom AS bottom " +
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36 "FROM annotations an " +
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37 "JOIN ranges r " +
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38 "ON an.range_id = r.id " +
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39 "JOIN attributes at " +
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40 "ON an.attribute_id = at.id " +
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41 "JOIN positions p " +
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42 "ON an.position_id = p.id " +
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43 "JOIN rivers riv " +
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44 "ON r.river_id = riv.id " +
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45 "LEFT JOIN annotation_types ant " +
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46 "ON an.type_id = ant.id " +
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47 "LEFT JOIN edges e " +
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48 "ON an.edge_id = e.id " +
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49 "WHERE riv.name = :river_name " +
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50 "ORDER BY r.a";
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51
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52 public static final String SQL_BY_RIVER_ID =
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53 "SELECT r.a AS a, r.b AS b, p.value AS position, " +
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54 "at.value AS attribute, ant.name AS name, " +
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55 "e.top AS top, e.bottom AS bottom " +
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56 "FROM annotations an " +
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57 "JOIN ranges r " +
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58 "ON an.range_id = r.id " +
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59 "JOIN attributes at " +
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60 "ON an.attribute_id = at.id " +
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61 "JOIN positions p " +
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62 "ON an.position_id = p.id " +
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63 "LEFT JOIN annotation_types ant " +
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64 "ON an.type_id = ant.id " +
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65 "LEFT JOIN edges e " +
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66 "ON an.edge_id = e.id " +
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67 "WHERE r.id = :river_id " +
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68 "ORDER BY r.a";
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69
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70 public static final double EPSILON = 1e-5;
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71
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72 public static final Comparator<Annotation> KM_CMP =
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73 new Comparator<Annotation>() {
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74 @Override
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75 public int compare(Annotation a, Annotation b) {
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76 double diff = a.a - b.a;
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77 if (diff < -EPSILON) return -1;
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78 if (diff > +EPSILON) return +1;
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79 return 0;
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80 }
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81 };
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82
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83 public static final class Annotation
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84 implements Serializable
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85 {
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86 private double a;
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87 private double b;
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88 private String position;
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89 private String attribute;
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90 private String name;
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91 private double top;
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92 private double bottom;
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93
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94 public Annotation() {
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95 }
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96
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97 public Annotation(double a) {
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98 this.a = a;
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99 }
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100
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101 public Annotation(
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102 double a,
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103 double b,
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104 String position,
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105 String attribute,
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106 String name,
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107 double top,
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108 double bottom
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109 ) {
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110 this.a = a;
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111 this.b = b;
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112 this.position = position;
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113 this.attribute = attribute;
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114 this.name = name;
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115 this.top = top;
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116 this.bottom = bottom;
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117 }
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118
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119 public double getA() {
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120 return a;
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121 }
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122
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123 public double getB() {
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124 return b;
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125 }
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126
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127 public String getPosition() {
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128 return position;
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129 }
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130
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131 public String getAttribute() {
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132 return attribute;
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133 }
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134
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135 public String getName() {
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136 return name;
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137 }
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138
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139 public double getTop() {
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140 return top;
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141 }
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142
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143 public double getBottom() {
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144 return bottom;
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145 }
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146
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147 @Override
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148 public String toString() {
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149 return "[a=" + a + ";b=" + b +
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150 ";pos=" + position + ";attr=" + attribute +
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151 ";name=" + name + ";top=" + top +
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152 ";bot=" + bottom + "]";
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153 }
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154 } // class Annotation
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155
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156 public interface Filter {
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157
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158 boolean accept(Annotation annotation);
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159
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160 } // interface Filter
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161
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162 public static class NameFilter implements Filter {
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163
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164 private Pattern namePattern;
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165
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166 public NameFilter(String name) {
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167 this.namePattern = Pattern.compile(name);
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168 }
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169
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170 @Override
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171 public boolean accept(Annotation annotation) {
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172 return namePattern.matcher(annotation.getName()).matches();
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173 }
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174 } // class NameFilter
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175
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176 public static final Filter ALL = new Filter() {
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177 @Override
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178 public boolean accept(Annotation annotation) {
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179 return true;
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180 }
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181 };
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182
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183 public static final Filter IS_POINT = new Filter() {
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184 @Override
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185 public boolean accept(Annotation annotation) {
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186 return Double.isNaN(annotation.getB());
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187 }
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188 };
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189
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190 public static final Filter IS_RANGE = new Filter() {
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191 @Override
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192 public boolean accept(Annotation annotation) {
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193 return !Double.isNaN(annotation.getB());
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194 }
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195 };
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196
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197 private Annotation [] annotations;
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198
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199 public FastAnnotations() {
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200 }
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201
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202 public FastAnnotations(Annotation [] annotations) {
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203 this.annotations = annotations;
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204 }
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205
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206 public FastAnnotations(String riverName) {
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207 this(loadByRiverName(riverName));
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208 }
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209
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210 public FastAnnotations(int riverId) {
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211 this(loadByRiverId(riverId));
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212 }
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213
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214 public FastAnnotations(Iterator<Annotation> iter) {
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215 this(toArray(iter));
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216 }
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217
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218 public int size() {
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219 return annotations.length;
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220 }
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221
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222 public Iterator<Annotation> filter(final Filter filter) {
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223 return new Iterator<Annotation>() {
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224
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225 private int idx;
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226 private Annotation current = findNext();
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227
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228 @Override
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229 public boolean hasNext() {
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230 return current != null;
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231 }
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232
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233 @Override
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234 public Annotation next() {
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235 if (current == null) {
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236 throw new NoSuchElementException();
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237 }
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238 Annotation result = current;
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239 current = findNext();
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240 return result;
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241 }
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242
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243 private Annotation findNext() {
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244
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245 while (idx < annotations.length) {
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246 Annotation annotation = annotations[idx++];
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247 if (filter.accept(annotation)) {
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248 return annotation;
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249 }
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250 }
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251
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252 return null;
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253 }
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254
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255 @Override
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256 public void remove() {
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257 throw new UnsupportedOperationException();
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258 }
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259 };
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260 }
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261
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262 public static Annotation [] toArray(Iterator<Annotation> iter) {
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263
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264 ArrayList<Annotation> list = new ArrayList<Annotation>();
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265
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266 while (iter.hasNext()) {
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267 list.add(iter.next());
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268 }
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269
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270 return list.toArray(new Annotation[list.size()]);
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271 }
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272
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273 public Annotation findByKm(double km) {
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274 Annotation key = new Annotation(km);
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275 int idx = Arrays.binarySearch(annotations, key, KM_CMP);
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276 return idx < 0 ? null : annotations[idx];
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277 }
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278
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279 private static SQLQuery createQuery(String query) {
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280 Session session = SessionHolder.HOLDER.get();
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281
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282 return session.createSQLQuery(query)
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283 .addScalar("a", StandardBasicTypes.DOUBLE)
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284 .addScalar("b", StandardBasicTypes.DOUBLE)
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285 .addScalar("position", StandardBasicTypes.STRING)
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286 .addScalar("attribute", StandardBasicTypes.STRING)
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287 .addScalar("name", StandardBasicTypes.STRING)
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288 .addScalar("top", StandardBasicTypes.DOUBLE)
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289 .addScalar("bottom", StandardBasicTypes.DOUBLE);
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290 }
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291
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292 private static Annotation [] buildAnnotations(List<Object []> list) {
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293 Annotation [] anns = new Annotation[list.size()];
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294
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295 // Names are likely the same because they are a type
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296 // like 'Pegel' or 'Hafen'.
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297 HashMap<String, String> names = new HashMap<String, String>();
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298
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299 for (int i = 0; i < anns.length; ++i) {
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300 Object [] data = list.get(i);
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301 double a = ((Double)data[0]);
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302 double b = data[1] != null ? (Double)data[1] : Double.NaN;
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303 String position = (String)data[2];
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304 String attribute = (String)data[3];
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305 String name = (String)data[4];
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306 double top = data[5] != null ? (Double)data[5] : Double.NaN;
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307 double bottom = data[6] != null ? (Double)data[6] : Double.NaN;
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308
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309 if (name != null) {
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310 String old = names.get(name);
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311 if (old != null) {
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312 name = old;
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313 }
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314 else {
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315 names.put(name, name);
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316 }
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317 }
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318
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319 anns[i] = new Annotation(
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320 a, b, position, attribute, name, top, bottom);
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321 }
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322
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323 return anns;
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324 }
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325
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326 public static Annotation [] loadByRiverName(String riverName) {
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327
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328 SQLQuery query = createQuery(SQL_BY_RIVER_NAME);
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329
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330 query.setString("river_name", riverName);
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331
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332 return buildAnnotations(query.list());
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333 }
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334
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335 public static Annotation [] loadByRiverId(int riverId) {
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336
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337 SQLQuery query = createQuery(SQL_BY_RIVER_ID);
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338
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339 query.setInteger("river_id", riverId);
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340
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341 return buildAnnotations(query.list());
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342 }
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343 }
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344 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org