Mercurial > dive4elements > river

annotate flys-backend/src/main/java/de/intevation/flys/importer/ImportMeasurementStation.java @ 5476:f9eee1909e6e

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Fix null pointer exception in ImportMeasurement Station Range may be null
author Andre Heinecke <aheinecke@intevation.de>
date Wed, 27 Mar 2013 17:49:46 +0100
parents de3c77d35fef
children bc140668db82
rev   line source
4193
f63b39799d2d Adapted DB schema (added relation measurement_station); improved importer to read files from filesystem with measurement stations.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
1 package de.intevation.flys.importer;
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2
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3 import java.util.List;
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4
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5 import org.apache.log4j.Logger;
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6 import org.hibernate.Session;
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7
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8 import de.intevation.flys.model.Gauge;
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9 import de.intevation.flys.model.MeasurementStation;
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10 import de.intevation.flys.model.Range;
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11 import de.intevation.flys.model.River;
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12 import de.intevation.flys.model.TimeInterval;
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13
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14
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15 public class ImportMeasurementStation {
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16
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17 private static final Logger log = Logger
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18 .getLogger(ImportMeasurementStation.class);
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19
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20 private MeasurementStation peer;
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21
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22 public String name;
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23 public Double station;
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24 public ImportRange range;
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25 public String measurementType;
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26 public String riverside;
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27 public String gauge;
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28 public ImportTimeInterval observationTimerange;
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29 public String operator;
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30 public String description;
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31
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32 public ImportMeasurementStation() {
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33 }
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34
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35 private Gauge getGaugeFromDB() {
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36 Session session = ImporterSession.getInstance().getDatabaseSession();
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37
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38 org.hibernate.Query query = session
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39 .createQuery("FROM Gauge WHERE name=:name");
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40
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41 query.setParameter("name", gauge);
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42 List<Gauge> gauges = query.list();
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43
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44 return gauges.isEmpty() ? null : gauges.get(0);
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45 }
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46
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47 public boolean storeDependencies(River river) {
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48 getPeer(river);
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49
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50 return peer != null;
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51 }
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52
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53 public Object getPeer(River river) {
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54 if (peer == null) {
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55 Gauge gauge = null;
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56 try {
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57 gauge = getGaugeFromDB();
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58 if (gauge == null) {
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59 log.warn("No gauge found for measurement station '" + name
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60 + "'");
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61 }
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62 }
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63 catch (Exception e) {
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64 log.error("Exception: " + e.getMessage());
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65 }
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66
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67 Range range = null;
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68
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69 if (this.range != null) {
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70 range = this.range.getPeer(river);
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71 }
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72
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73 if (range == null) {
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74 log.warn("No range found for measurement station'" + name + "'");
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75 }
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76
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77 TimeInterval observationTimerange = this.observationTimerange
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78 .getPeer();
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79 if (observationTimerange == null) {
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80 log.warn("No time range found for measurement station '"
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81 + name + "'");
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82 }
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83
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84 Session session = ImporterSession.getInstance()
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85 .getDatabaseSession();
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86
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87 org.hibernate.Query query = session
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88 .createQuery(
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89 "FROM MeasurementStation " +
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90 "WHERE river=:river" +
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91 " AND station=:station " +
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92 " AND measurement_type=:measurement_type ");
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93
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94 query.setParameter("river", river);
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95 query.setParameter("station", station);
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96 query.setParameter("measurement_type", measurementType);
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97
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98 List<MeasurementStation> stations = query.list();
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99
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100 if (stations.isEmpty()) {
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101 log.info("create new measurement station '" + name + "'");
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102
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103 peer = new MeasurementStation(river, name, measurementType,
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104 riverside, station, range, gauge, this.gauge,
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105 observationTimerange, operator, description);
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107 session.save(peer);
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108 }
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109 }
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111 return peer;
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112 }
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113 }
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