Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/sq/MeasurementFactory.java @ 3291:b52c4b34ec1b

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SQ relation: Do not store null values from database. flys-artifacts/trunk@4959 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Thu, 12 Jul 2012 20:29:05 +0000
parents 36f3b53d5cfc
children e06036fdf0c7
rev   line source
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1 package de.intevation.flys.artifacts.model.sq;
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2
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3 import de.intevation.flys.artifacts.model.DateRange;
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4
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5 import de.intevation.flys.backend.SedDBSessionHolder;
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6
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7 import java.util.HashMap;
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8 import java.util.Map;
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9
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10 import org.apache.log4j.Logger;
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11
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12 import org.hibernate.SQLQuery;
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13 import org.hibernate.Session;
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14
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15 import org.hibernate.transform.BasicTransformerAdapter;
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16
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17 import org.hibernate.type.StandardBasicTypes;
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18
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19 public class MeasurementFactory
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20 {
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21 private static final Logger log =
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22 Logger.getLogger(MeasurementFactory.class);
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23
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24 public static final String SQL_MEASSURE =
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25 "SELECT " +
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26 "m.TSAND AS TSAND," +
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27 "m.TSCHWEB AS TSCHWEB," +
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28 "m.CSCHWEB AS CSCHWEB " +
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29 "m.Q AS Q " +
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30 /* TODO: Select more */
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31 "FROM messung m " +
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32 "JOIN station s ON m.stationid = s.stationid " +
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33 "JOIN gewaesser g ON s.gewaesserid = g.gewaesserid " +
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34 "WHERE " +
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35 "g.name = :river_name AND " +
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36 "s.km BETWEEN :location - 0.001 AND :location + 0.001 AND " +
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37 "m.datum BETWEEN :from AND :to AND " +
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38 "m.Q IS NOT NULL";
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39
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40 public static final class MeasurementResultTransformer
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41 extends BasicTransformerAdapter
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42 {
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43 public static MeasurementResultTransformer INSTANCE =
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44 new MeasurementResultTransformer();
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45
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46 public MeasurementResultTransformer() {
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47 }
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48
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49 @Override
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50 public Object transformTuple(Object [] tuple, String [] aliases) {
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51 Map<String, Object> map = new HashMap<String, Object>();
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52 for (int i = 0; i < tuple.length; ++i) {
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53 if (tuple[i] != null) {
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54 map.put(aliases[i], tuple[i]);
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55 }
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56 }
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57 return new Measurement(map);
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58 }
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59 } // class BasicTransformerAdapter
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60
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61 private MeasurementFactory() {
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62 }
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63
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64 protected static Measurements load(
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65 Session session,
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66 String river,
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67 double location,
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68 DateRange dateRange
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69 ) {
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70 SQLQuery query = session.createSQLQuery(SQL_MEASSURE)
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71 .addScalar("TSAND", StandardBasicTypes.DOUBLE)
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72 .addScalar("TSCHWEB", StandardBasicTypes.DOUBLE)
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73 .addScalar("CSCHWEB", StandardBasicTypes.DOUBLE)
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74 .addScalar("Q", StandardBasicTypes.DOUBLE);
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75
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76 query.setString("river_name", river);
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77 query.setDouble("location", location);
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78 query.setDate("from", dateRange.getFrom());
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79 query.setDate("to", dateRange.getTo());
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80
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81 query.setResultTransformer(MeasurementResultTransformer.INSTANCE);
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82
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83 return new Measurements(query.list());
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84 }
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85
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86 public static Measurements getMeasurements(
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87 String river,
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88 double location,
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89 DateRange dateRange
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90 ) {
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91 Session session = SedDBSessionHolder.HOLDER.get();
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92 try {
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93 return load(session, river, location, dateRange);
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94 }
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95 finally {
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96 session.close();
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97 }
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98 }
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99 }
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100 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org