Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/services/CrossSectionKMService.java @ 1967:27bb2e24f7f8

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Preparations for better CrossSection diagrams. flys-artifacts/trunk@3378 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Felix Wolfsteller <felix.wolfsteller@intevation.de>
date Fri, 09 Dec 2011 15:57:32 +0000
parents 4781096f31f8
children e0b081105a82
rev   line source
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1 package de.intevation.flys.artifacts.services;
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2
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3 import de.intevation.artifacts.CallMeta;
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4 import de.intevation.artifacts.GlobalContext;
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5
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6 import de.intevation.artifacts.common.ArtifactNamespaceContext;
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7 import de.intevation.artifacts.common.utils.XMLUtils;
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8
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9 import de.intevation.flys.artifacts.cache.CacheFactory;
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10
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11 import de.intevation.flys.backend.SessionHolder;
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12
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13 import de.intevation.flys.model.CrossSection;
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14 import de.intevation.flys.model.CrossSectionLine;
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15
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16 import java.util.AbstractMap;
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17 import java.util.ArrayDeque;
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18 import java.util.Deque;
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19 import java.util.List;
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20 import java.util.Map;
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21 import java.util.NavigableMap;
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22
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23 import java.util.concurrent.ConcurrentSkipListMap;
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24
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25 import net.sf.ehcache.Cache;
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26
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27 import org.apache.log4j.Logger;
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28
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29 import org.hibernate.Query;
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30 import org.hibernate.Session;
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31
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32 import org.w3c.dom.Document;
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33 import org.w3c.dom.Element;
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34 import org.w3c.dom.NodeList;
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35
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36
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37 /**
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38 * Service to find the next/previous km (measurement) of cross sections.
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39 * Looking at the query for a single cross-section id at a single km, the
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40 * service does the following:
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41 *
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42 * It returns the km itself if a measurement at that km was found and
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43 * the N nearest other measurement points in both directions.
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44 *
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45 * That means, you can pass N=0 to find out whether a measurement at given km
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46 * exists.
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47 *
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48 * If less than N neighbours exist in one direction, less are delivered
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49 * (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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50 * result in [4,5,7,8,9]).
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51 */
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52 public class CrossSectionKMService
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53 extends FLYSService
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54 {
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55 private static Logger logger =
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56 Logger.getLogger(CrossSectionKMService.class);
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57
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58 public static final String CACHE_NAME = "cross-section-kms";
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59
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60
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61 /** Trivial constructor. */
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62 public CrossSectionKMService() {
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63 }
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64
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65
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66 /**
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67 * @param data
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68 */
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69 @Override
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70 public Document doProcess(
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71 Document data,
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72 GlobalContext globalContext,
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73 CallMeta callMeta
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74 ) {
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75 logger.debug("CrossSectionKMService.doProcess");
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76
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77 NodeList crossSectionNodes =
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78 data.getElementsByTagName("art:cross-section");
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79
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80 Cache cache = CacheFactory.getCache(CACHE_NAME);
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81
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82 Document document = XMLUtils.newDocument();
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83
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84 Element all = document.createElement("cross-sections");
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85
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86 for (int i = 0, CS = crossSectionNodes.getLength(); i < CS; ++i) {
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87 Element crossSectionElement = (Element)crossSectionNodes.item(i);
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88
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89 String idString = crossSectionElement.getAttribute("id");
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90 String kmString = crossSectionElement.getAttribute("km");
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91 String neighborsString = crossSectionElement.getAttribute("n");
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92
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93 if (idString.length() == 0 || kmString.length() == 0) {
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94 logger.debug("missing attributes in cross-section element");
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95 continue;
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96 }
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97
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98 double km;
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99 Integer crossSectionId;
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100 int N = 2;
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101
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102 try {
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103 km = Double.parseDouble(kmString);
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104 crossSectionId = Integer.valueOf(idString);
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105
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106 if (neighborsString.length() > 0) {
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107 N = Integer.parseInt(neighborsString);
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108 }
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109 }
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110 catch (NumberFormatException nfe) {
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111 logger.debug("converting number failed", nfe);
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112 continue;
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
113 }
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
114
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
115 NavigableMap<Double, Integer> map;
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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116
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
117 if (cache == null) {
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
118 map = getUncached(crossSectionId);
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
119 }
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
120 else {
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
121 net.sf.ehcache.Element element = cache.get(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:
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122 if (element == null) {
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
123 map = getUncached(crossSectionId);
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
124 if (map != null) {
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
125 element = new net.sf.ehcache.Element(
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
126 crossSectionId, map);
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
127 cache.put(element);
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
128 }
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
129 }
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
130 else {
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
131 map = (NavigableMap<Double, Integer>)element.getValue();
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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132 }
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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133 }
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134
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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135 if (map == null) {
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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136 logger.debug("cannot find cross section " + crossSectionId);
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
137 continue;
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:
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138 }
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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139
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140 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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parents:
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141 nearestNeighbors(map, km, N);
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142
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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143 if (!result.isEmpty()) {
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 Element csE = document.createElement("cross-section");
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145 csE.setAttribute("id", idString);
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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146 for (Map.Entry<Double, Integer> entry: result) {
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:
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147 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.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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148 lineE.setAttribute(
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:
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149 "line-id", String.valueOf(entry.getValue()));
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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150 lineE.setAttribute(
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parents:
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151 "km", String.valueOf(entry.getKey()));
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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152 csE.appendChild(lineE);
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parents:
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153 }
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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154 all.appendChild(csE);
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
155 }
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
156 }
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
157
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parents:
diff changeset
158 document.appendChild(all);
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parents:
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159
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
160 return document;
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
161 }
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
162
1961
4781096f31f8 Mainly documentation.
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163
4781096f31f8 Mainly documentation.
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164 /**
4781096f31f8 Mainly documentation.
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parents: 1749
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165 * @param km the kilometer from which to start searching for other
4781096f31f8 Mainly documentation.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
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166 * measurements
4781096f31f8 Mainly documentation.
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parents: 1749
diff changeset
167 * @param N number of neighboring measurements to find.
4781096f31f8 Mainly documentation.
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parents: 1749
diff changeset
168 */
1749
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parents:
diff changeset
169 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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parents:
diff changeset
170 NavigableMap<Double, Integer> map,
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
171 double km,
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
172 int N
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
173 ) {
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
174 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.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
175 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.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
176
1961
4781096f31f8 Mainly documentation.
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parents: 1749
diff changeset
177 if(map.get(km) != null) {
4781096f31f8 Mainly documentation.
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parents: 1749
diff changeset
178 result.add(new AbstractMap.SimpleEntry<Double, Integer>(km,map.get(km)));
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diff changeset
179
4781096f31f8 Mainly documentation.
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parents: 1749
diff changeset
180 }
4781096f31f8 Mainly documentation.
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diff changeset
181
1749
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
182 int i = 0;
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
183 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.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
184 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.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
185 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
186 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
187 }
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
188 result.addFirst(entry);
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
189 }
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
190
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
191 i = 0;
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
192 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.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
193 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.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
194 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
195 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
196 }
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
197 result.addLast(entry);
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
198 }
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
199
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
200 return result;
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
201 }
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
202
1961
4781096f31f8 Mainly documentation.
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diff changeset
203
4781096f31f8 Mainly documentation.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 1749
diff changeset
204 /**
4781096f31f8 Mainly documentation.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 1749
diff changeset
205 * @param crossSectionId id of queried cross-section (in db).
4781096f31f8 Mainly documentation.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 1749
diff changeset
206 * @return Mapping from kilometer to db-id.
4781096f31f8 Mainly documentation.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 1749
diff changeset
207 */
1749
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
208 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
209 Integer crossSectionId
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 NavigableMap<Double, Integer> result =
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
212 new ConcurrentSkipListMap<Double, Integer>();
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
213
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
214 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.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
215 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
216 "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
217 query.setParameter("id", crossSectionId);
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
218
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
219 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.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
220 if (crossSections.isEmpty()) {
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
221 return null;
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
222 }
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
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
224 CrossSection crossSection = crossSections.get(0);
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:
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225 List<CrossSectionLine> lines = crossSection.getLines();
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226
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227 for (CrossSectionLine line: lines) {
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228 Double km = line.getKm().doubleValue();
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229 Integer id = line.getId();
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230 result.put(km, id);
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231 }
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232
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233 return result;
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234 }
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235 }
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236 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org