tim@455: /**
tim@455:  *
tim@455:  */
tim@455: package de.intevation.gnv.math;
tim@455: 
tim@455: import java.util.Collection;
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@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@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@455:         double resultValue = 0;
tim@455:         Collection<Result> result = null;
tim@455:         try {
tim@455:             String[] filterValues = new String[]{"Point ("+coordinate.x+" "+coordinate.y+")"};
tim@455:             result = this.queryExecutor.executeQuery(this.queryID,filterValues);
tim@455:         } catch (QueryException e) {
tim@455:             log.error(e,e);
tim@455:         }
tim@455:         
tim@455:         if (result != null){
tim@455:             if (!result.isEmpty()){
tim@455:                 Result row = result.iterator().next();
tim@455:                 resultValue = row.getDouble(0);
tim@455:             }else{
tim@455:                 resultValue = Double.NaN;
tim@455:             }
tim@455:         }else{
tim@455:             resultValue = Double.NaN;
tim@455:         }
tim@455:         return resultValue;
tim@455:     }
tim@455: 
tim@455: }