Mercurial > dive4elements > gnv-client
comparison gnv-artifacts/src/main/java/de/intevation/gnv/math/QueriedXYDepth.java @ 657:af3f56758f59
merged gnv-artifacts/0.5
| author | Thomas Arendsen Hein <thomas@intevation.de> |
|---|---|
| date | Fri, 28 Sep 2012 12:13:53 +0200 |
| parents | f7038820df2e |
| children | 9a828e5a2390 |
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| 590:5f5f273c8566 | 657:af3f56758f59 |
|---|---|
| 1 /** | |
| 2 * | |
| 3 */ | |
| 4 package de.intevation.gnv.math; | |
| 5 | |
| 6 import java.util.ArrayList; | |
| 7 import java.util.Collection; | |
| 8 | |
| 9 import java.lang.ref.SoftReference; | |
| 10 | |
| 11 import org.apache.log4j.Logger; | |
| 12 | |
| 13 import com.vividsolutions.jts.geom.Coordinate; | |
| 14 | |
| 15 import de.intevation.gnv.geobackend.base.Result; | |
| 16 import de.intevation.gnv.geobackend.base.query.QueryExecutor; | |
| 17 import de.intevation.gnv.geobackend.base.query.QueryExecutorFactory; | |
| 18 import de.intevation.gnv.geobackend.base.query.exception.QueryException; | |
| 19 import de.intevation.gnv.geobackend.sde.datasources.RasterObject; | |
| 20 | |
| 21 import de.intevation.gnv.utils.WKTUtils; | |
| 22 | |
| 23 /** | |
| 24 * @author Tim Englich (tim.englich@intevation.de) | |
| 25 * @author Sascha L. Teichmann (sascha.teichmann@intevation.de) | |
| 26 */ | |
| 27 public class QueriedXYDepth implements XYDepth { | |
| 28 | |
| 29 /** | |
| 30 * the logger, used to log exceptions and additonaly information | |
| 31 */ | |
| 32 private static Logger log = Logger.getLogger(QueriedXYDepth.class); | |
| 33 | |
| 34 private static final String queryID = "rasterQuery"; | |
| 35 | |
| 36 private QueryExecutor queryExecutor; | |
| 37 | |
| 38 private ArrayList<SoftReference<RasterObject>> rasterData; | |
| 39 | |
| 40 private RasterObject last; | |
| 41 | |
| 42 private int interpolation; | |
| 43 | |
| 44 public QueriedXYDepth() { | |
| 45 this(RasterObject.BILINEAR); | |
| 46 } | |
| 47 | |
| 48 public QueriedXYDepth(int interpolation) { | |
| 49 this.interpolation = interpolation; | |
| 50 rasterData = new ArrayList<SoftReference<RasterObject>>(); | |
| 51 queryExecutor = QueryExecutorFactory.getInstance().getQueryExecutor(); | |
| 52 } | |
| 53 | |
| 54 /** | |
| 55 * @see de.intevation.gnv.math.XYDepth#depth(com.vividsolutions.jts.geom.Coordinate) | |
| 56 */ | |
| 57 public double depth(Coordinate coordinate) { | |
| 58 double resultValue = Double.NaN; | |
| 59 | |
| 60 RasterObject ro = getRasterObject(coordinate); | |
| 61 | |
| 62 if (ro == null) { | |
| 63 try { | |
| 64 String[] filterValues = new String[] { WKTUtils.toWKT(coordinate) }; | |
| 65 Collection<Result> result = queryExecutor.executeQuery(this.queryID,filterValues); | |
| 66 for (Result row: result) { | |
| 67 if ((ro = (RasterObject)row.getObject(0)) != null) { | |
| 68 rasterData.add(new SoftReference<RasterObject>(last = ro)); | |
| 69 } | |
| 70 break; | |
| 71 } | |
| 72 } catch (QueryException e) { | |
| 73 log.error(e, e); | |
| 74 } | |
| 75 } | |
| 76 return ro != null | |
| 77 ? ro.getValue(coordinate, interpolation) | |
| 78 : Double.NaN; | |
| 79 } | |
| 80 | |
| 81 private RasterObject getRasterObject(Coordinate coordinate) { | |
| 82 if (last != null && last.contains(coordinate)) { | |
| 83 return last; | |
| 84 } | |
| 85 for (int i = rasterData.size()-1; i >= 0; --i) { | |
| 86 SoftReference<RasterObject> ref = rasterData.get(i); | |
| 87 RasterObject ro = ref.get(); | |
| 88 if (ro != null && ro.contains(coordinate)) { | |
| 89 return last = ro; | |
| 90 } | |
| 91 } | |
| 92 return null; | |
| 93 } | |
| 94 } |