Mercurial > dive4elements > river

annotate flys-backend/src/main/java/de/intevation/flys/model/FastAnnotations.java @ 4483:cc6323401643

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Cosmetics: Removed some WSP, obsolete imports. Documentation added.
author Felix Wolfsteller <felix.wolfsteller@intevation.de>
date Tue, 13 Nov 2012 16:52:01 +0100
parents 20d249e1589f
children
rev   line source
2382
c5791de0c495 Added meachnism to backend to fetch all annotation related data in one go.
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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