--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gnv-artifacts/src/main/java/de/intevation/gnv/math/QueriedXYDepth.java	Mon Jan 04 15:27:33 2010 +0000
@@ -0,0 +1,67 @@
+/**
+ *
+ */
+package de.intevation.gnv.math;
+
+import java.util.Collection;
+
+import org.apache.log4j.Logger;
+
+import com.vividsolutions.jts.geom.Coordinate;
+
+import de.intevation.gnv.geobackend.base.Result;
+import de.intevation.gnv.geobackend.base.query.QueryExecutor;
+import de.intevation.gnv.geobackend.base.query.QueryExecutorFactory;
+import de.intevation.gnv.geobackend.base.query.exception.QueryException;
+
+
+/**
+ * @author Tim Englich <tim.englich@intevation.de>
+ *
+ */
+public class QueriedXYDepth implements XYDepth {
+
+    /**
+     * the logger, used to log exceptions and additonaly information
+     */
+    private static Logger log = Logger.getLogger(QueriedXYDepth.class);
+    
+    private String queryID = "rasterQuery";
+    
+    private QueryExecutor queryExecutor = null;
+    
+    /**
+     * Constructor
+     */
+    public QueriedXYDepth() {
+        this.queryExecutor = QueryExecutorFactory.getInstance().getQueryExecutor();
+    }
+
+    /**
+     * @see de.intevation.gnv.math.XYDepth#depth(com.vividsolutions.jts.geom.Coordinate)
+     */
+    public double depth(Coordinate coordinate) {
+        log.debug("QueriedXYDepth.depth for " + coordinate.x+" "+ coordinate.y);
+        double resultValue = 0;
+        Collection<Result> result = null;
+        try {
+            String[] filterValues = new String[]{"Point ("+coordinate.x+" "+coordinate.y+")"};
+            result = this.queryExecutor.executeQuery(this.queryID,filterValues);
+        } catch (QueryException e) {
+            log.error(e,e);
+        }
+        
+        if (result != null){
+            if (!result.isEmpty()){
+                Result row = result.iterator().next();
+                resultValue = row.getDouble(0);
+            }else{
+                resultValue = Double.NaN;
+            }
+        }else{
+            resultValue = Double.NaN;
+        }
+        return resultValue;
+    }
+
+}