--- a/flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/DistanceOnlySelect.java	Wed Sep 21 14:28:39 2011 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/DistanceOnlySelect.java	Thu Sep 22 07:58:24 2011 +0000
@@ -2,6 +2,12 @@
 
 import org.apache.log4j.Logger;
 
+import de.intevation.artifacts.Artifact;
+
+import de.intevation.artifactdatabase.data.StateData;
+
+import de.intevation.flys.artifacts.FLYSArtifact;
+
 
 public class DistanceOnlySelect extends DistanceSelect {
 
@@ -11,5 +17,35 @@
     protected String getUIProvider() {
         return "distance_only_panel";
     }
+
+
+    @Override
+    public boolean validate(Artifact artifact)
+    throws IllegalArgumentException
+    {
+        FLYSArtifact flys = (FLYSArtifact) artifact;
+
+        StateData dFrom = getData(flys, getLowerField());
+        StateData dTo   = getData(flys, getUpperField());
+
+        String fromStr = dFrom != null ? (String) dFrom.getValue() : null;
+        String toStr   = dTo   != null ? (String) dTo.getValue()   : null;
+
+        if (fromStr == null || toStr == null) {
+            throw new IllegalArgumentException("error_empty_state");
+        }
+
+        try {
+            double from = Double.parseDouble(fromStr);
+            double to   = Double.parseDouble(toStr);
+
+            double[] minmax = getMinMax(flys);
+
+            return validateBounds(minmax[0], minmax[1], from, to);
+        }
+        catch (NumberFormatException nfe) {
+            throw new IllegalArgumentException("error_invalid_double_value");
+        }
+    }
 }
 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :