tim@455: /**
tim@455:  *
tim@455:  */
tim@455: package de.intevation.gnv.math;
tim@455: 
tim@457: import java.util.ArrayList;
tim@455: import java.util.Collection;
tim@457: import java.util.HashMap;
tim@455: 
tim@455: import org.apache.log4j.Logger;
tim@455: 
tim@455: import com.vividsolutions.jts.geom.Coordinate;
tim@455: 
tim@455: import de.intevation.gnv.geobackend.base.Result;
tim@455: import de.intevation.gnv.geobackend.base.query.QueryExecutor;
tim@455: import de.intevation.gnv.geobackend.base.query.QueryExecutorFactory;
tim@455: import de.intevation.gnv.geobackend.base.query.exception.QueryException;
tim@457: import de.intevation.gnv.geobackend.sde.datasources.RasterObject;
tim@455: 
tim@455: 
tim@455: /**
tim@455:  * @author Tim Englich <tim.englich@intevation.de>
tim@455:  *
tim@455:  */
tim@455: public class QueriedXYDepth implements XYDepth {
tim@455: 
tim@455:     /**
tim@455:      * the logger, used to log exceptions and additonaly information
tim@455:      */
tim@455:     private static Logger log = Logger.getLogger(QueriedXYDepth.class);
tim@455:     
tim@455:     private String queryID = "rasterQuery";
tim@455:     
tim@455:     private QueryExecutor queryExecutor = null;
tim@455:     
tim@457:     private ArrayList<RasterObject> rasterData = new ArrayList<RasterObject>();
tim@457:     
tim@455:     /**
tim@455:      * Constructor
tim@455:      */
tim@455:     public QueriedXYDepth() {
tim@455:         this.queryExecutor = QueryExecutorFactory.getInstance().getQueryExecutor();
tim@455:     }
tim@455: 
tim@455:     /**
tim@455:      * @see de.intevation.gnv.math.XYDepth#depth(com.vividsolutions.jts.geom.Coordinate)
tim@455:      */
tim@455:     public double depth(Coordinate coordinate) {
tim@455:         log.debug("QueriedXYDepth.depth for " + coordinate.x+" "+ coordinate.y);
tim@457:         double resultValue = Double.NaN;
tim@455:         
tim@457:         RasterObject ro = this.getRasterObject(coordinate);
tim@457:         
tim@457:         if (ro == null){
tim@457:             Collection<Result> result = null;
tim@457:             try {
tim@457:                 String[] filterValues = new String[]{"Point ("+coordinate.x+" "+coordinate.y+")"};
tim@457:                 result = this.queryExecutor.executeQuery(this.queryID,filterValues);
tim@457:             } catch (QueryException e) {
tim@457:                 log.error(e,e);
tim@455:             }
tim@457:             
tim@457:             if (result != null){
tim@457:                 if (!result.isEmpty()){
tim@457:                     Result row = result.iterator().next();
tim@457:                     ro = (RasterObject)row.getObject(0);
tim@457:                     synchronized (rasterData) {
tim@457:                         rasterData.add(ro);
tim@457:                     }
tim@457:                 }
tim@457:             }
tim@457:         }
tim@457:         if (ro != null){
tim@457:             resultValue = ro.getValue(coordinate); 
tim@455:         }
tim@455:         return resultValue;
tim@455:     }
tim@457:     
tim@457:     private RasterObject getRasterObject(Coordinate coordinate){
tim@457:         for (int i = 0; i < rasterData.size(); i++){
tim@457:             RasterObject ro = rasterData.get(i);
tim@457:             if (ro.getEnvelope().contains(coordinate)){
tim@457:                 return ro;
tim@457:             }
tim@457:         }
tim@457:         return null;
tim@457:        
tim@457:     }
tim@455: 
tim@455: }