Mercurial > dive4elements > river

annotate flys-backend/src/main/java/de/intevation/flys/importer/ImportWaterlevelDifference.java @ 3943:a5b003595d6c

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Store minfo values into database only if their peer has been successfully stored. flys-backend/trunk@5520 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Wed, 19 Sep 2012 10:05:36 +0000
parents 0d27d02b1208
children 8320427ecd5c
rev   line source
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a1402c16152f Added a parser and importer classes used to import waterlevel differences.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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1 package de.intevation.flys.importer;
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2
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3 import java.sql.SQLException;
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4 import java.util.ArrayList;
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5 import java.util.List;
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6
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7 import org.apache.log4j.Logger;
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8
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9 import org.hibernate.Session;
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10 import org.hibernate.Query;
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11 import org.hibernate.exception.ConstraintViolationException;
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12
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13 import de.intevation.flys.model.River;
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14 import de.intevation.flys.model.Unit;
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15 import de.intevation.flys.model.WaterlevelDifference;
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16
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17
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18 public class ImportWaterlevelDifference {
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19
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20 private static final Logger log = Logger
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21 .getLogger(ImportWaterlevelDifference.class);
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22
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23 private ImportUnit unit;
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24
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25 private String description;
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26
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27 private List<ImportWaterlevelDifferenceColumn> columns;
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28
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29 private WaterlevelDifference peer;
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30
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31 public ImportWaterlevelDifference(String description) {
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32 this.columns = new ArrayList<ImportWaterlevelDifferenceColumn>();
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33
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34 this.description = description;
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35 }
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36
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37 public void setUnit(ImportUnit unit) {
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38 this.unit = unit;
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39 }
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40
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41 public void addValue(ImportWaterlevelDifferenceColumn column) {
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42 this.columns.add(column);
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43 }
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44
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45 public void storeDependencies(River river) throws SQLException,
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46 ConstraintViolationException {
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47 log.info("store dependencies");
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48
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49 WaterlevelDifference peer = getPeer(river);
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50
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51 if (peer != null) {
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52 int i = 0;
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53
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54 for (ImportWaterlevelDifferenceColumn column : columns) {
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55 column.storeDependencies(peer);
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56 i++;
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57 }
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58
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59 log.info("stored " + i + " waterlevel difference columns");
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60 }
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61 }
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62
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63 public WaterlevelDifference getPeer(River river) {
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64 Unit u = unit != null ? unit.getPeer() : null;
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65 if (u == null) {
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66 log.warn("IWD: skip invalid waterlevel difference - no unit set!");
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67 return null;
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68 }
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69
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70 if (peer == null) {
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71 Session session = ImporterSession.getInstance()
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72 .getDatabaseSession();
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73 Query query = session
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74 .createQuery("from WaterlevelDifference where "
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75 + " river=:river and " + " unit=:unit and "
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76 + " description=:description");
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77
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78 query.setParameter("river", river);
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79 query.setParameter("unit", u);
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80 query.setParameter("description", description);
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81
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82 List<WaterlevelDifference> diffs = query.list();
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83 if (diffs.isEmpty()) {
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84 peer = new WaterlevelDifference(river, u, description);
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85 session.save(peer);
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86 }
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87 else {
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88 peer = diffs.get(0);
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89 }
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90 }
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91
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92 return peer;
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93 }
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94 }
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95 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org