Mercurial > dive4elements > river
comparison flys-backend/src/main/java/de/intevation/flys/model/River.java @ 769:321b9e480f72
Added a method to river to find the gauge with the max overlap with a given interval.
flys-backend/trunk@2235 c6561f87-3c4e-4783-a992-168aeb5c3f6f
| author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
|---|---|
| date | Sun, 26 Jun 2011 16:13:08 +0000 |
| parents | 87ac543c7ab9 |
| children | c3ea91aee989 |
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| 768:87ac543c7ab9 | 769:321b9e480f72 |
|---|---|
| 111 | 111 |
| 112 Query query = session.createQuery( | 112 Query query = session.createQuery( |
| 113 "from Gauge where river=:river " + | 113 "from Gauge where river=:river " + |
| 114 "and not (range.a > :b or range.b < :a) order by a"); | 114 "and not (range.a > :b or range.b < :a) order by a"); |
| 115 query.setParameter("river", this); | 115 query.setParameter("river", this); |
| 116 query.setParameter("a", new BigDecimal(a)); | 116 query.setParameter("a", new BigDecimal(a, PRECISION)); |
| 117 query.setParameter("b", new BigDecimal(b)); | 117 query.setParameter("b", new BigDecimal(b, PRECISION)); |
| 118 | 118 |
| 119 return query.list(); | 119 return query.list(); |
| 120 } | |
| 121 | |
| 122 public Gauge maxOverlap(double a, double b) { | |
| 123 List<Gauge> gauges = determineGauges(a, b); | |
| 124 if (gauges == null) { | |
| 125 return null; | |
| 126 } | |
| 127 | |
| 128 if (a > b) { double t = a; a = b; b = t; } | |
| 129 | |
| 130 double max = -Double.MAX_VALUE; | |
| 131 | |
| 132 Gauge result = null; | |
| 133 | |
| 134 for (Gauge gauge: gauges) { | |
| 135 Range r = gauge.getRange(); | |
| 136 double c = r.getA().doubleValue(); | |
| 137 double d = r.getB().doubleValue(); | |
| 138 | |
| 139 double start = c >= a ? c : a; | |
| 140 double stop = d <= b ? d : b; | |
| 141 | |
| 142 double length = stop - start; | |
| 143 | |
| 144 if (length > max) { | |
| 145 max = length; | |
| 146 result = gauge; | |
| 147 } | |
| 148 } | |
| 149 | |
| 150 return result; | |
| 120 } | 151 } |
| 121 | 152 |
| 122 public Gauge determineGaugeByName(String name) { | 153 public Gauge determineGaugeByName(String name) { |
| 123 Session session = SessionHolder.HOLDER.get(); | 154 Session session = SessionHolder.HOLDER.get(); |
| 124 Query query = session.createQuery( | 155 Query query = session.createQuery( |