Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/artifacts/model/RiverFactory.java @ 6152:0587819960c3

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Waterlevel differences & bed height differences: Add new model LinearInterpolated intented to unify the two very similiar calculations. The focus of the current implementation is correctness and not speed! The fact that the data sets more mostly sorted by station is not exploited. Doing so would improve performance significantly.
author Sascha L. Teichmann <teichmann@intevation.de>
date Sun, 02 Jun 2013 17:52:53 +0200
parents af13ceeba52a
children
rev   line source
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4897a58c8746 River artifacts: Added new copyright headers.
Sascha L. Teichmann <teichmann@intevation.de>
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
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2 * Software engineering by Intevation GmbH
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3 *
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4 * This file is Free Software under the GNU AGPL (>=v3)
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the
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6 * documentation coming with Dive4Elements River for details.
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7 */
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8
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9 package org.dive4elements.river.artifacts.model;
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11 import java.util.List;
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12
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13 import org.dive4elements.river.backend.SessionHolder;
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14 import org.dive4elements.river.model.River;
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15
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16 import org.hibernate.Query;
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17 import org.hibernate.Session;
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18
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19 /**
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20 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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21 */
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22 public class RiverFactory {
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23
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24 /** We don't need to instantiate concrete objects of this class. */
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25 private RiverFactory() {
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26 }
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27
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28
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29 /**
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30 * Returns all rivers that were found in the backend.
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31 *
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32 * @return all rivers.
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33 */
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34 public static List<River> getRivers() {
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35 Session session = SessionHolder.HOLDER.get();
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36
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37 return session.createQuery("from River order by name").list();
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38 }
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39
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40
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41 /**
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42 * Returns a River object fetched from database based on its id.
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43 *
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44 * @param river_id The id of the desired river.
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45 *
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46 * @return the river.
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47 */
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48 public static River getRiver(int river_id) {
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49 Session session = SessionHolder.HOLDER.get();
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50
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51 Query query = session.createQuery("from River where id=:river_id");
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52 query.setParameter("river_id", river_id);
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54 List<River> rivers = query.list();
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55
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56 return rivers.isEmpty() ? null : rivers.get(0);
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57 }
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60 /**
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61 * Returns a River object fetched from database based on its name.
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62 *
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63 * @param river The name of a river.
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64 *
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65 * @return the River object.
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66 */
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67 public static River getRiver(String river) {
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68 Session session = SessionHolder.HOLDER.get();
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69
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70 Query query = session.createQuery(
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71 "from River where name =:name");
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72 query.setParameter("name", river);
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73
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74 List<River> rivers = query.list();
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75
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76 return rivers.isEmpty() ? null : rivers.get(0);
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77 }
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78 }
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79 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org