Mercurial > dive4elements > river
comparison flys-backend/src/main/java/de/intevation/flys/model/CrossSectionTrack.java @ 2341:8e2fe935ddf1
Added function to retrieve nearest CrossSectionTrack to a given kilometer.
flys-backend/trunk@2826 c6561f87-3c4e-4783-a992-168aeb5c3f6f
| author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
|---|---|
| date | Mon, 26 Sep 2011 15:26:44 +0000 |
| parents | 47ce1fab8464 |
| children | d42249d91f47 |
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| 2340:c4f090a00178 | 2341:8e2fe935ddf1 |
|---|---|
| 102 "from CrossSectionTrack where river.name =:river"); | 102 "from CrossSectionTrack where river.name =:river"); |
| 103 query.setParameter("river", river); | 103 query.setParameter("river", river); |
| 104 | 104 |
| 105 return query.list(); | 105 return query.list(); |
| 106 } | 106 } |
| 107 | |
| 108 | |
| 109 /** | |
| 110 * Returns the nearest CrossSectionTrack of <i>river</i> to a given | |
| 111 * <i>km</i>. | |
| 112 * | |
| 113 * @param river The name of a river. | |
| 114 * @param km The kilometer value. | |
| 115 * | |
| 116 * @return the nearest CrossSectionTrack to <i>km</i> of river <i>river</i>. | |
| 117 */ | |
| 118 public static CrossSectionTrack getCrossSectionTrack( | |
| 119 String river, | |
| 120 double km | |
| 121 ) { | |
| 122 Session session = SessionHolder.HOLDER.get(); | |
| 123 | |
| 124 Query query = session.createQuery( | |
| 125 "from CrossSectionTrack where river.name =:river " + | |
| 126 "order by abs( km - :mykm)"); | |
| 127 query.setParameter("river", river); | |
| 128 query.setParameter("mykm", new BigDecimal(km)); | |
| 129 | |
| 130 List<CrossSectionTrack> cst = query.list(); | |
| 131 | |
| 132 return cst != null && !cst.isEmpty() ? cst.get(0) : null; | |
| 133 } | |
| 107 } | 134 } |
| 108 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : | 135 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |