Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/artifacts/services/CrossSectionKMService.java @ 8755:30b1ddadf275

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(issue1801) Unify reference gauge finding code The basic way as described in the method comment of the determineRefGauge method is now used in the WINFOArtifact, MainValuesService and RiverUtils.getGauge method. RiverUtils.getGauge previously just returned the first gauge found. While this is now a behavior change I believe that it is always more correct then the undeterministic behavior of the previous implmenentation.
author Andre Heinecke <andre.heinecke@intevation.de>
date Wed, 24 Jun 2015 14:07:26 +0200
parents e4606eae8ea5
children 0a5239a1e46e
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.artifacts.services;
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10
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11 import org.dive4elements.artifacts.CallMeta;
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12 import org.dive4elements.artifacts.GlobalContext;
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13
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14 import org.dive4elements.artifacts.common.utils.XMLUtils;
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15
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16 import org.dive4elements.river.artifacts.cache.CacheFactory;
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17
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18 import org.dive4elements.river.backend.SessionHolder;
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19
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20 import org.dive4elements.river.model.CrossSection;
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21 import org.dive4elements.river.model.CrossSectionLine;
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22
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23 import java.util.AbstractMap;
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24 import java.util.ArrayDeque;
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25 import java.util.Deque;
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26 import java.util.List;
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27 import java.util.Map;
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28 import java.util.NavigableMap;
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29
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30 import java.util.concurrent.ConcurrentSkipListMap;
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31
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32 import net.sf.ehcache.Cache;
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33
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34 import org.apache.log4j.Logger;
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35
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36 import org.hibernate.Query;
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37 import org.hibernate.Session;
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38
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39 import org.w3c.dom.Document;
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40 import org.w3c.dom.Element;
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41 import org.w3c.dom.NodeList;
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42
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43
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44 /**
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45 * Service to find the next/previous km (measurement) of cross sections.
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46 * Looking at the query for a single cross-section id at a single km, the
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47 * service does the following:
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48 *
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49 * It returns the km itself if a measurement at that km was found and
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50 * the N nearest other measurement points in both directions.
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51 *
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52 * That means, you can pass N=0 to find out whether a measurement at given km
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53 * exists.
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54 *
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55 * If less than N neighbours exist in one direction, less are delivered
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56 * (e.g. given measurements at [0,2,3,4,5,7,8,9] a query for km=8, N=3 will
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57 * result in [4,5,7,8,9]).
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58 */
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59 public class CrossSectionKMService
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60 extends D4EService
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61 {
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62 private static Logger log =
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63 Logger.getLogger(CrossSectionKMService.class);
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64
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65 public static final String CACHE_NAME = "cross-section-kms";
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66
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67
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68 /** Trivial constructor. */
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69 public CrossSectionKMService() {
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70 }
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71
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72
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73 /**
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74 * @param data
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75 */
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76 @Override
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77 public Document doProcess(
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78 Document data,
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79 GlobalContext globalContext,
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80 CallMeta callMeta
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81 ) {
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82 log.debug("CrossSectionKMService.doProcess");
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83
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84 NodeList crossSectionNodes =
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85 data.getElementsByTagName("art:cross-section");
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86
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87 Document document = XMLUtils.newDocument();
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88
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89 Element all = document.createElement("cross-sections");
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90
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91 for (int i = 0, CS = crossSectionNodes.getLength(); i < CS; ++i) {
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92 Element crossSectionElement = (Element)crossSectionNodes.item(i);
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93
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94 String idString = crossSectionElement.getAttribute("id");
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95 String kmString = crossSectionElement.getAttribute("km");
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96 String neighborsString = crossSectionElement.getAttribute("n");
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97
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98 if (idString.length() == 0 || kmString.length() == 0) {
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99 log.debug("missing attributes in cross-section element");
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100 continue;
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101 }
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102
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103 double km;
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104 Integer crossSectionId;
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105 int N = 2;
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106
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107 try {
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108 km = Double.parseDouble(kmString);
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109 crossSectionId = Integer.valueOf(idString);
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110
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111 if (neighborsString.length() > 0) {
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112 N = Integer.parseInt(neighborsString);
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113 }
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114 }
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115 catch (NumberFormatException nfe) {
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e4606eae8ea5 sed src/**/*.java 's/logger/log/g'
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diff changeset
116 log.debug("converting number failed", nfe);
1749
f7d890f4855f Added Service Service to lookup the Nth nearest neighbors for a set of given cross section ids and kms.
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diff changeset
117 continue;
f7d890f4855f Added Service Service to lookup the Nth nearest neighbors for a set of given cross section ids and kms.
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diff changeset
118 }
f7d890f4855f Added Service Service to lookup the Nth nearest neighbors for a set of given cross section ids and kms.
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diff changeset
119
2120
f021080cb409 Use improved caching for cross section lines data.
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diff changeset
120 NavigableMap<Double, Integer> map = getKms(crossSectionId);
1749
f7d890f4855f Added Service Service to lookup the Nth nearest neighbors for a set of given cross section ids and kms.
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121
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diff changeset
122 if (map == null) {
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e4606eae8ea5 sed src/**/*.java 's/logger/log/g'
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diff changeset
123 log.debug("cannot find cross section " + crossSectionId);
1749
f7d890f4855f Added Service Service to lookup the Nth nearest neighbors for a set of given cross section ids and kms.
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diff changeset
124 continue;
f7d890f4855f Added Service Service to lookup the Nth nearest neighbors for a set of given cross section ids and kms.
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125 }
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126
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127 Deque<Map.Entry<Double, Integer>> result =
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128 nearestNeighbors(map, km, N);
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129
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diff changeset
130 if (!result.isEmpty()) {
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diff changeset
131 Element csE = document.createElement("cross-section");
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diff changeset
132 csE.setAttribute("id", idString);
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133 for (Map.Entry<Double, Integer> entry: result) {
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diff changeset
134 Element lineE = document.createElement("line");
f7d890f4855f Added Service Service to lookup the Nth nearest neighbors for a set of given cross section ids and kms.
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diff changeset
135 lineE.setAttribute(
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136 "line-id", String.valueOf(entry.getValue()));
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137 lineE.setAttribute(
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138 "km", String.valueOf(entry.getKey()));
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139 csE.appendChild(lineE);
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140 }
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141 all.appendChild(csE);
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142 }
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143 }
f7d890f4855f Added Service Service to lookup the Nth nearest neighbors for a set of given cross section ids and kms.
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144
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145 document.appendChild(all);
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146
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147 return document;
f7d890f4855f Added Service Service to lookup the Nth nearest neighbors for a set of given cross section ids and kms.
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148 }
f7d890f4855f Added Service Service to lookup the Nth nearest neighbors for a set of given cross section ids and kms.
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149
2120
f021080cb409 Use improved caching for cross section lines data.
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diff changeset
150 public static NavigableMap<Double, Integer> getKms(int crossSectionId) {
f021080cb409 Use improved caching for cross section lines data.
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151
f021080cb409 Use improved caching for cross section lines data.
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diff changeset
152 Cache cache = CacheFactory.getCache(CACHE_NAME);
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153
f021080cb409 Use improved caching for cross section lines data.
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diff changeset
154 if (cache == null) {
f021080cb409 Use improved caching for cross section lines data.
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diff changeset
155 return getUncached(crossSectionId);
f021080cb409 Use improved caching for cross section lines data.
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diff changeset
156 }
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diff changeset
157
f021080cb409 Use improved caching for cross section lines data.
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diff changeset
158 NavigableMap<Double, Integer> map;
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diff changeset
159
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diff changeset
160 net.sf.ehcache.Element element = cache.get(crossSectionId);
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diff changeset
161 if (element == null) {
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diff changeset
162 map = getUncached(crossSectionId);
f021080cb409 Use improved caching for cross section lines data.
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diff changeset
163 if (map != null) {
f021080cb409 Use improved caching for cross section lines data.
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diff changeset
164 element = new net.sf.ehcache.Element(
f021080cb409 Use improved caching for cross section lines data.
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diff changeset
165 crossSectionId, map);
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diff changeset
166 cache.put(element);
f021080cb409 Use improved caching for cross section lines data.
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diff changeset
167 }
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diff changeset
168 }
f021080cb409 Use improved caching for cross section lines data.
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diff changeset
169 else {
f021080cb409 Use improved caching for cross section lines data.
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diff changeset
170 map = (NavigableMap<Double, Integer>)element.getValue();
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diff changeset
171 }
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diff changeset
172
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diff changeset
173 return map;
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diff changeset
174 }
f021080cb409 Use improved caching for cross section lines data.
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diff changeset
175
1961
4781096f31f8 Mainly documentation.
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176
4781096f31f8 Mainly documentation.
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diff changeset
177 /**
4781096f31f8 Mainly documentation.
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178 * @param km the kilometer from which to start searching for other
4781096f31f8 Mainly documentation.
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diff changeset
179 * measurements
4781096f31f8 Mainly documentation.
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180 * @param N number of neighboring measurements to find.
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181 */
1749
f7d890f4855f Added Service Service to lookup the Nth nearest neighbors for a set of given cross section ids and kms.
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182 public static Deque<Map.Entry<Double, Integer>> nearestNeighbors(
f7d890f4855f Added Service Service to lookup the Nth nearest neighbors for a set of given cross section ids and kms.
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diff changeset
183 NavigableMap<Double, Integer> map,
f7d890f4855f Added Service Service to lookup the Nth nearest neighbors for a set of given cross section ids and kms.
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diff changeset
184 double km,
f7d890f4855f Added Service Service to lookup the Nth nearest neighbors for a set of given cross section ids and kms.
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diff changeset
185 int N
f7d890f4855f Added Service Service to lookup the Nth nearest neighbors for a set of given cross section ids and kms.
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diff changeset
186 ) {
f7d890f4855f Added Service Service to lookup the Nth nearest neighbors for a set of given cross section ids and kms.
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187 Deque<Map.Entry<Double, Integer>> result =
f7d890f4855f Added Service Service to lookup the Nth nearest neighbors for a set of given cross section ids and kms.
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188 new ArrayDeque<Map.Entry<Double, Integer>>(2*N);
f7d890f4855f Added Service Service to lookup the Nth nearest neighbors for a set of given cross section ids and kms.
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189
2120
f021080cb409 Use improved caching for cross section lines data.
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diff changeset
190 Integer v = map.get(km);
1961
4781096f31f8 Mainly documentation.
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diff changeset
191
2120
f021080cb409 Use improved caching for cross section lines data.
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diff changeset
192 if (v != null) {
f021080cb409 Use improved caching for cross section lines data.
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parents: 1973
diff changeset
193 result.add(new AbstractMap.SimpleEntry<Double, Integer>(km, v));
1961
4781096f31f8 Mainly documentation.
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diff changeset
194 }
4781096f31f8 Mainly documentation.
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diff changeset
195
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f7d890f4855f Added Service Service to lookup the Nth nearest neighbors for a set of given cross section ids and kms.
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diff changeset
196 int i = 0;
f7d890f4855f Added Service Service to lookup the Nth nearest neighbors for a set of given cross section ids and kms.
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diff changeset
197 for (Map.Entry<Double, Integer> entry:
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diff changeset
198 map.headMap(km, false).descendingMap().entrySet()) {
f7d890f4855f Added Service Service to lookup the Nth nearest neighbors for a set of given cross section ids and kms.
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diff changeset
199 if (i++ >= N) {
f7d890f4855f Added Service Service to lookup the Nth nearest neighbors for a set of given cross section ids and kms.
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parents:
diff changeset
200 break;
f7d890f4855f Added Service Service to lookup the Nth nearest neighbors for a set of given cross section ids and kms.
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parents:
diff changeset
201 }
f7d890f4855f Added Service Service to lookup the Nth nearest neighbors for a set of given cross section ids and kms.
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parents:
diff changeset
202 result.addFirst(entry);
f7d890f4855f Added Service Service to lookup the Nth nearest neighbors for a set of given cross section ids and kms.
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diff changeset
203 }
f7d890f4855f Added Service Service to lookup the Nth nearest neighbors for a set of given cross section ids and kms.
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parents:
diff changeset
204
f7d890f4855f Added Service Service to lookup the Nth nearest neighbors for a set of given cross section ids and kms.
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parents:
diff changeset
205 i = 0;
f7d890f4855f Added Service Service to lookup the Nth nearest neighbors for a set of given cross section ids and kms.
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parents:
diff changeset
206 for (Map.Entry<Double, Integer> entry:
f7d890f4855f Added Service Service to lookup the Nth nearest neighbors for a set of given cross section ids and kms.
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parents:
diff changeset
207 map.tailMap(km, false).entrySet()) {
f7d890f4855f Added Service Service to lookup the Nth nearest neighbors for a set of given cross section ids and kms.
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parents:
diff changeset
208 if (i++ >= N) {
f7d890f4855f Added Service Service to lookup the Nth nearest neighbors for a set of given cross section ids and kms.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
209 break;
f7d890f4855f Added Service Service to lookup the Nth nearest neighbors for a set of given cross section ids and kms.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
210 }
f7d890f4855f Added Service Service to lookup the Nth nearest neighbors for a set of given cross section ids and kms.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
211 result.addLast(entry);
f7d890f4855f Added Service Service to lookup the Nth nearest neighbors for a set of given cross section ids and kms.
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parents:
diff changeset
212 }
f7d890f4855f Added Service Service to lookup the Nth nearest neighbors for a set of given cross section ids and kms.
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parents:
diff changeset
213
f7d890f4855f Added Service Service to lookup the Nth nearest neighbors for a set of given cross section ids and kms.
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parents:
diff changeset
214 return result;
f7d890f4855f Added Service Service to lookup the Nth nearest neighbors for a set of given cross section ids and kms.
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parents:
diff changeset
215 }
f7d890f4855f Added Service Service to lookup the Nth nearest neighbors for a set of given cross section ids and kms.
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parents:
diff changeset
216
1961
4781096f31f8 Mainly documentation.
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diff changeset
217
4781096f31f8 Mainly documentation.
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parents: 1749
diff changeset
218 /**
4781096f31f8 Mainly documentation.
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parents: 1749
diff changeset
219 * @param crossSectionId id of queried cross-section (in db).
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parents: 1749
diff changeset
220 * @return Mapping from kilometer to db-id.
4781096f31f8 Mainly documentation.
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parents: 1749
diff changeset
221 */
1749
f7d890f4855f Added Service Service to lookup the Nth nearest neighbors for a set of given cross section ids and kms.
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parents:
diff changeset
222 public static NavigableMap<Double, Integer> getUncached(
f7d890f4855f Added Service Service to lookup the Nth nearest neighbors for a set of given cross section ids and kms.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
223 Integer crossSectionId
f7d890f4855f Added Service Service to lookup the Nth nearest neighbors for a set of given cross section ids and kms.
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parents:
diff changeset
224 ) {
f7d890f4855f Added Service Service to lookup the Nth nearest neighbors for a set of given cross section ids and kms.
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parents:
diff changeset
225 NavigableMap<Double, Integer> result =
f7d890f4855f Added Service Service to lookup the Nth nearest neighbors for a set of given cross section ids and kms.
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parents:
diff changeset
226 new ConcurrentSkipListMap<Double, Integer>();
f7d890f4855f Added Service Service to lookup the Nth nearest neighbors for a set of given cross section ids and kms.
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parents:
diff changeset
227
f7d890f4855f Added Service Service to lookup the Nth nearest neighbors for a set of given cross section ids and kms.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
228 Session session = SessionHolder.HOLDER.get();
f7d890f4855f Added Service Service to lookup the Nth nearest neighbors for a set of given cross section ids and kms.
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parents:
diff changeset
229 Query query = session.createQuery(
f7d890f4855f Added Service Service to lookup the Nth nearest neighbors for a set of given cross section ids and kms.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
230 "from CrossSection where id=:id");
f7d890f4855f Added Service Service to lookup the Nth nearest neighbors for a set of given cross section ids and kms.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
231 query.setParameter("id", crossSectionId);
f7d890f4855f Added Service Service to lookup the Nth nearest neighbors for a set of given cross section ids and kms.
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parents:
diff changeset
232
f7d890f4855f Added Service Service to lookup the Nth nearest neighbors for a set of given cross section ids and kms.
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parents:
diff changeset
233 List<CrossSection> crossSections = query.list();
f7d890f4855f Added Service Service to lookup the Nth nearest neighbors for a set of given cross section ids and kms.
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parents:
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234 if (crossSections.isEmpty()) {
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235 return null;
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236 }
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237
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238 CrossSection crossSection = crossSections.get(0);
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239 List<CrossSectionLine> lines = crossSection.getLines();
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240
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241 for (CrossSectionLine line: lines) {
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242 Double km = line.getKm().doubleValue();
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243 Integer id = line.getId();
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244 result.put(km, id);
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245 }
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246
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247 return result;
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248 }
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249 }
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250 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org