Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/AnnotationsFactory.java @ 4009:60d88ec49c3b
S(Q) relation. Fixed SQL statements.
author | Sascha L. Teichmann <teichmann@intevation.de> |
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date | Tue, 02 Oct 2012 01:42:45 +0200 |
parents | a5f65e8983be |
children | 6ed8ebd48d6e |
rev | line source |
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301
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1 package de.intevation.flys.artifacts.model; |
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3 import java.math.BigDecimal; |
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4 |
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5 import java.util.List; |
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6 import java.util.Iterator; |
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7 import java.util.Collections; |
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8 |
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9 import de.intevation.flys.backend.SessionHolder; |
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10 import de.intevation.flys.model.Annotation; |
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11 import de.intevation.flys.model.Range; |
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12 import de.intevation.flys.model.River; |
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13 |
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14 import org.hibernate.Session; |
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15 import org.hibernate.Query; |
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16 |
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17 /** |
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18 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> |
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19 */ |
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20 public class AnnotationsFactory { |
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21 |
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22 /** |
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23 * Get Annotations which do not have a "b" ("to")-value set. |
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24 * |
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25 * @param river name of the river of interest. |
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26 * |
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27 * @return List of Annotations for river which have only "a" ("from") |
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28 * value set. |
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29 */ |
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30 public static List<Annotation> getPointAnnotations(String river) { |
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31 Session session = SessionHolder.HOLDER.get(); |
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32 |
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33 Query query = session.createQuery( |
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34 "from Annotation as an " + |
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35 "where an.range.b = null and an.range.river.name=:name " + |
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36 "order by range.a"); |
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37 query.setParameter("name", river); |
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38 return query.list(); |
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39 } |
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40 |
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41 |
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42 public static List<Annotation> getAnnotations(River river) { |
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43 Session session = SessionHolder.HOLDER.get(); |
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44 |
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45 Query query = session.createQuery( |
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46 "from Annotation as an where an.range.river = :river" + |
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47 " order by an.range.a"); |
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48 query.setParameter("river", river); |
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49 return query.list(); |
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50 } |
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51 |
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52 |
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53 public static Annotation getAnnotation(String river, double km) { |
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54 Session session = SessionHolder.HOLDER.get(); |
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55 |
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56 Query query = session.createQuery( |
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57 "from Annotation as a " + |
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58 "where a.range.river.name = :river AND a.range.a = :km"); |
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59 |
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60 query.setParameter("river", river); |
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61 query.setParameter("km", BigDecimal.valueOf(km)); |
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62 |
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63 List<Annotation> result = query.list(); |
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64 |
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65 return result != null && result.size() > 0 ? result.get(0) : null; |
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66 } |
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67 |
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68 |
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69 /** |
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70 * Get minimal "a" ("from") and maximal "b" ("to") value of annotations' |
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71 * ranges of a river. |
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72 * |
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73 * @param river name of the river of interest. |
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74 * |
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75 * @return Array containing minimal "a" and max "b" value of any |
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76 * annotation stored for the given river. |
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77 */ |
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78 public static double[] getAnnotationsBreadth(String river) { |
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79 Session session = SessionHolder.HOLDER.get(); |
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80 |
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81 Query minAQuery = session.createQuery( |
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82 "select min(a), max(b) from Range where river.name=:name"); |
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83 minAQuery.setParameter("name", river); |
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84 |
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85 double[] minAmaxB = {0.0f, 0.0f}; |
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86 Object[] row = (Object[]) minAQuery.list().iterator().next(); |
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87 minAmaxB[0] = ((BigDecimal) row[0]).doubleValue(); |
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88 minAmaxB[1] = ((BigDecimal) row[1]).doubleValue(); |
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89 return minAmaxB; |
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90 } |
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91 |
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92 |
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93 public static Iterator<Annotation> getAnnotationsIterator( |
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94 String riverName |
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95 ) { |
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96 Session session = SessionHolder.HOLDER.get(); |
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97 |
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98 Query riverQuery = session.createQuery( |
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99 "from River where name = :name"); |
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100 riverQuery.setParameter("name", riverName); |
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101 List<River> rivers = riverQuery.list(); |
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102 if (rivers.isEmpty()) { |
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103 return Collections.<Annotation>emptyList().iterator(); |
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104 } |
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105 |
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106 Query query = session.createQuery( |
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Optimize query to fix annotations fetching on oracle, by Sascha Teichmann.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
1031
diff
changeset
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107 "from Annotation as an" + |
57b03b3ab15c
Optimize query to fix annotations fetching on oracle, by Sascha Teichmann.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
1031
diff
changeset
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108 " where an.range.river = :river order by an.range.a"); |
57b03b3ab15c
Optimize query to fix annotations fetching on oracle, by Sascha Teichmann.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
1031
diff
changeset
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109 query.setParameter("river", rivers.get(0)); |
57b03b3ab15c
Optimize query to fix annotations fetching on oracle, by Sascha Teichmann.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
1031
diff
changeset
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110 |
644
02c0cce0e469
Introduce a cache for the distance-info service
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
332
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111 return (Iterator<Annotation>)query.iterate(); |
02c0cce0e469
Introduce a cache for the distance-info service
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
332
diff
changeset
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112 } |
301
1a00cb4998a8
Implemented a service that retrieves distance information for a specific river.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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113 } |
1a00cb4998a8
Implemented a service that retrieves distance information for a specific river.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff
changeset
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114 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 : |