Mercurial > dive4elements > river

annotate backend/src/main/java/org/dive4elements/river/importer/common/AbstractKmLineImport.java @ 8988:ae76f618d990

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Checks added for missing import directory
author mschaefer
date Sun, 08 Apr 2018 18:09:32 +0200
parents 50416a0df385
children ddebd4c2fe93
rev   line source
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1 /* Copyright (C) 2017 by Bundesanstalt für Gewässerkunde
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2 * Software engineering by
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3 * Björnsen Beratende Ingenieure GmbH
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4 * Dr. Schumacher Ingenieurbüro für Wasser und Umwelt
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5 *
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6 * This file is Free Software under the GNU AGPL (>=v3)
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7 * and comes with ABSOLUTELY NO WARRANTY! Check out the
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8 * documentation coming with Dive4Elements River for details.
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9 */
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10
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11 package org.dive4elements.river.importer.common;
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12
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13 import org.dive4elements.river.importer.ImporterSession;
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14 import org.hibernate.Session;
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15
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16 /**
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17 * Abstract base class of a river station with associated data importing from a file
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18 *
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19 * @author Matthias Schäfer
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20 *
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21 */
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22 public abstract class AbstractKmLineImport<SERIES, KMTUPLE> {
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23
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24 /***** FIELDS *****/
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25
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26 protected double station;
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27
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28 private KMTUPLE peer;
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29
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30 protected StoreMode storeMode;
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31
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32
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33 /***** CONSTRUCTOR *****/
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34
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35 public AbstractKmLineImport(final double km) {
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36 this.station = km;
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37 this.storeMode = StoreMode.NONE;
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38 }
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39
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40
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41 /***** METHODS *****/
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42
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43 /**
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44 * Stores the station value record in the database
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45 */
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46 public StoreMode store(final SERIES parent, final StoreMode parentStoreMode) {
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47 getPeer(parent, parentStoreMode);
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48 return this.storeMode;
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49 }
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50
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51
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52 /**
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53 * Gets the station value record from the database if existing, or creates a database record from this object and adds
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54 * it
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55 */
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56 protected KMTUPLE getPeer(final SERIES parent, final StoreMode parentStoreMode) {
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57 if (this.peer != null)
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58 return this.peer;
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59 final Session session = ImporterSession.getInstance().getDatabaseSession();
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60 KMTUPLE value = null;
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61 if (parentStoreMode != StoreMode.INSERT) {
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62 value = queryValueItem(session, parent);
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63 }
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64 if (value == null) {
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65 this.peer = createValueItem(parent);
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66 session.save(this.peer);
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67 this.storeMode = StoreMode.INSERT;
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68 } else {
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69 this.peer = value;
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70 this.storeMode = StoreMode.UPDATE;
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71 }
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72 return this.peer;
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73 }
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74
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75 /**
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76 * Queries the (first matching) value item from the database
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77 *
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78 * @return first matching database value item, or null
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79 */
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80 protected abstract KMTUPLE queryValueItem(final Session session, final SERIES parent);
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81
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82 /**
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83 * Creates a new value item
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84 */
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85 protected abstract KMTUPLE createValueItem(final SERIES parent);
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86 }
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