Mercurial > dive4elements > river

annotate flys-backend/src/main/java/de/intevation/flys/model/FastAnnotations.java @ 4573:b87073a05f9d

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flys-client: Patch to render combobox options as clickable links. The way of passing data arguments to the links and further to the Artifact feeding service is somewhat hacked and should be refactored (later...).
author Christian Lins <christian.lins@intevation.de>
date Tue, 27 Nov 2012 12:50:10 +0100
parents 20d249e1589f
children
rev   line source
2382
c5791de0c495 Added meachnism to backend to fetch all annotation related data in one go.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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1 package de.intevation.flys.model;
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2
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3 import java.util.Comparator;
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4 import java.util.ArrayList;
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5 import java.util.List;
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6 import java.util.Arrays;
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7 import java.util.HashMap;
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8 import java.util.Iterator;
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9 import java.util.NoSuchElementException;
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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 org.hibernate.Session;
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14 import org.hibernate.SQLQuery;
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15
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16 import org.hibernate.type.StandardBasicTypes;
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17
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18 import de.intevation.flys.backend.SessionHolder;
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19
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20 public class FastAnnotations
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21 implements Serializable
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22 {
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23 public static final String SQL_BY_RIVER_NAME =
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24 "SELECT r.a AS a, r.b AS b, p.value AS position, " +
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25 "at.value AS attribute, ant.name AS name, " +
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26 "e.top AS top, e.bottom AS bottom " +
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27 "FROM annotations an " +
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28 "JOIN ranges r " +
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29 "ON an.range_id = r.id " +
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30 "JOIN attributes at " +
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31 "ON an.attribute_id = at.id " +
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32 "JOIN positions p " +
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33 "ON an.position_id = p.id " +
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34 "JOIN rivers riv " +
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35 "ON r.river_id = riv.id " +
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36 "LEFT JOIN annotation_types ant " +
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37 "ON an.type_id = ant.id " +
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38 "LEFT JOIN edges e " +
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39 "ON an.edge_id = e.id " +
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40 "WHERE riv.name = :river_name " +
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41 "ORDER BY r.a";
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42
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43 public static final String SQL_BY_RIVER_ID =
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44 "SELECT r.a AS a, r.b AS b, p.value AS position, " +
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45 "at.value AS attribute, ant.name AS name, " +
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46 "e.top AS top, e.bottom AS bottom " +
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47 "FROM annotations an " +
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48 "JOIN ranges r " +
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49 "ON an.range_id = r.id " +
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50 "JOIN attributes at " +
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51 "ON an.attribute_id = at.id " +
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52 "JOIN positions p " +
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53 "ON an.position_id = p.id " +
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54 "LEFT JOIN annotation_types ant " +
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55 "ON an.type_id = ant.id " +
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56 "LEFT JOIN edges e " +
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57 "ON an.edge_id = e.id " +
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58 "WHERE r.id = :river_id " +
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59 "ORDER BY r.a";
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60
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61 public static final double EPSILON = 1e-5;
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62
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63 public static final Comparator<Annotation> KM_CMP =
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64 new Comparator<Annotation>() {
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65 @Override
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66 public int compare(Annotation a, Annotation b) {
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67 double diff = a.a - b.a;
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68 if (diff < -EPSILON) return -1;
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69 if (diff > +EPSILON) return +1;
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70 return 0;
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71 }
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72 };
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73
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74 public static final class Annotation
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75 implements Serializable
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76 {
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77 private double a;
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78 private double b;
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79 private String position;
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80 private String attribute;
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81 private String name;
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82 private double top;
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83 private double bottom;
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84
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85 public Annotation() {
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86 }
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87
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88 public Annotation(double a) {
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89 this.a = a;
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90 }
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91
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92 public Annotation(
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93 double a,
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94 double b,
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95 String position,
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96 String attribute,
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97 String name,
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98 double top,
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99 double bottom
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100 ) {
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101 this.a = a;
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102 this.b = b;
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103 this.position = position;
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104 this.attribute = attribute;
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105 this.name = name;
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106 this.top = top;
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107 this.bottom = bottom;
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108 }
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109
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110 public double getA() {
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111 return a;
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112 }
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113
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114 public double getB() {
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115 return b;
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116 }
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117
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118 public String getPosition() {
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119 return position;
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120 }
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121
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122 public String getAttribute() {
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123 return attribute;
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124 }
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125
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126 public String getName() {
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127 return name;
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128 }
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129
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130 public double getTop() {
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131 return top;
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132 }
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133
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134 public double getBottom() {
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135 return bottom;
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136 }
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137
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138 @Override
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139 public String toString() {
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140 return "[a=" + a + ";b=" + b +
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141 ";pos=" + position + ";attr=" + attribute +
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142 ";name=" + name + ";top=" + top +
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143 ";bot=" + bottom + "]";
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144 }
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145 } // class Annotation
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146
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147 public interface Filter {
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148
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149 boolean accept(Annotation annotation);
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150
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151 } // interface Filter
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152
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153 public static class NameFilter implements Filter {
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154
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155 private String name;
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156
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157 public NameFilter(String name) {
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158 this.name = name;
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159 }
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160
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161 @Override
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162 public boolean accept(Annotation annotation) {
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163 return annotation.getName().contains(name);
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164 }
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165 } // class NameFilter
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166
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167 public static final Filter ALL = new Filter() {
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168 @Override
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169 public boolean accept(Annotation annotation) {
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170 return true;
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171 }
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172 };
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173
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174 public static final Filter IS_POINT = new Filter() {
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175 @Override
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176 public boolean accept(Annotation annotation) {
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177 return Double.isNaN(annotation.getB());
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178 }
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179 };
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180
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181 public static final Filter IS_RANGE = new Filter() {
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182 @Override
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183 public boolean accept(Annotation annotation) {
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184 return !Double.isNaN(annotation.getB());
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185 }
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186 };
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187
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188 private Annotation [] annotations;
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189
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190 public FastAnnotations() {
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191 }
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192
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193 public FastAnnotations(Annotation [] annotations) {
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194 this.annotations = annotations;
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195 }
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196
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197 public FastAnnotations(String riverName) {
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198 this(loadByRiverName(riverName));
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199 }
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200
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201 public FastAnnotations(int riverId) {
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202 this(loadByRiverId(riverId));
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203 }
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204
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205 public FastAnnotations(Iterator<Annotation> iter) {
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206 this(toArray(iter));
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207 }
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208
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209 public int size() {
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210 return annotations.length;
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211 }
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212
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213 public Iterator<Annotation> filter(final Filter filter) {
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214 return new Iterator<Annotation>() {
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215
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216 private int idx;
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217 private Annotation current = findNext();
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218
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219 @Override
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220 public boolean hasNext() {
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221 return current != null;
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222 }
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223
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224 @Override
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225 public Annotation next() {
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226 if (current == null) {
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227 throw new NoSuchElementException();
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228 }
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229 Annotation result = current;
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230 current = findNext();
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231 return result;
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232 }
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233
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234 private Annotation findNext() {
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235
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236 while (idx < annotations.length) {
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237 Annotation annotation = annotations[idx++];
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238 if (filter.accept(annotation)) {
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239 return annotation;
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240 }
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241 }
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242
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243 return null;
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244 }
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245
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246 @Override
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247 public void remove() {
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248 throw new UnsupportedOperationException();
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249 }
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250 };
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251 }
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252
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253 public static Annotation [] toArray(Iterator<Annotation> iter) {
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254
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255 ArrayList<Annotation> list = new ArrayList<Annotation>();
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256
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257 while (iter.hasNext()) {
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258 list.add(iter.next());
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259 }
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260
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261 return list.toArray(new Annotation[list.size()]);
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262 }
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263
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264 public Annotation findByKm(double km) {
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265 Annotation key = new Annotation(km);
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266 int idx = Arrays.binarySearch(annotations, key, KM_CMP);
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267 return idx < 0 ? null : annotations[idx];
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268 }
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269
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270 private static SQLQuery createQuery(String query) {
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271 Session session = SessionHolder.HOLDER.get();
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272
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273 return session.createSQLQuery(query)
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274 .addScalar("a", StandardBasicTypes.DOUBLE)
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275 .addScalar("b", StandardBasicTypes.DOUBLE)
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276 .addScalar("position", StandardBasicTypes.STRING)
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277 .addScalar("attribute", StandardBasicTypes.STRING)
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278 .addScalar("name", StandardBasicTypes.STRING)
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279 .addScalar("top", StandardBasicTypes.DOUBLE)
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280 .addScalar("bottom", StandardBasicTypes.DOUBLE);
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281 }
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282
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283 private static Annotation [] buildAnnotations(List<Object []> list) {
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284 Annotation [] anns = new Annotation[list.size()];
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285
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286 // Names are likely the same because they are a type
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287 // like 'Pegel' or 'Hafen'.
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288 HashMap<String, String> names = new HashMap<String, String>();
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289
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290 for (int i = 0; i < anns.length; ++i) {
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291 Object [] data = list.get(i);
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292 double a = ((Double)data[0]);
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293 double b = data[1] != null ? (Double)data[1] : Double.NaN;
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294 String position = (String)data[2];
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295 String attribute = (String)data[3];
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296 String name = (String)data[4];
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297 double top = data[5] != null ? (Double)data[5] : Double.NaN;
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298 double bottom = data[6] != null ? (Double)data[6] : Double.NaN;
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299
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300 if (name != null) {
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301 String old = names.get(name);
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302 if (old != null) {
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303 name = old;
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304 }
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305 else {
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306 names.put(name, name);
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307 }
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308 }
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309
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310 anns[i] = new Annotation(
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311 a, b, position, attribute, name, top, bottom);
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312 }
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313
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314 return anns;
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315 }
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316
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317 public static Annotation [] loadByRiverName(String riverName) {
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318
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319 SQLQuery query = createQuery(SQL_BY_RIVER_NAME);
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320
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321 query.setString("river_name", riverName);
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322
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323 return buildAnnotations(query.list());
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324 }
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325
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326 public static Annotation [] loadByRiverId(int riverId) {
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327
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328 SQLQuery query = createQuery(SQL_BY_RIVER_ID);
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329
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330 query.setInteger("river_id", riverId);
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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 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org