--- a/gnv-artifacts/src/main/java/de/intevation/gnv/transition/MinMaxTransition.java	Fri Oct 23 07:37:39 2009 +0000
+++ b/gnv-artifacts/src/main/java/de/intevation/gnv/transition/MinMaxTransition.java	Fri Oct 23 08:50:50 2009 +0000
@@ -19,6 +19,10 @@
 public class MinMaxTransition extends TransitionBase {
 
     /**
+     * The UID of this Class
+     */
+    private static final long serialVersionUID = -3525903792105187408L;
+    /**
      * the logger, used to log exceptions and additonaly information
      */
     private static Logger log = Logger.getLogger(MinMaxTransition.class);
@@ -37,22 +41,23 @@
     @Override
     protected void purifyResult(Collection<Result> result, String uuid) {
         log.debug("MinMaxTransition.purifyResult");
-        if (this.descibeData == null) {
-            this.descibeData = new ArrayList<Object>();
+        Collection<Object> describeData = this.getDescibeData(uuid);
+        if (describeData == null) {
+            describeData = new ArrayList<Object>();
         }
         if (result != null && result.size() == 1) {
 
             String minName = this.dataName;
             String maxName = this.dataName;
             Result value = result.iterator().next();
-            DescribeData describeData = new DefaultMinMaxDescribeData(minName,
+            DescribeData values = new DefaultMinMaxDescribeData(minName,
                     maxName, value.getObject("MIN"), value.getObject("MAX"));
-            log.debug(describeData.toString());
-            this.descibeData.add(describeData);
+            log.debug(values.toString());
+            describeData.add(values);
         } else {
             log.warn("Result cannot be handled as MinMax Resultset");
         }
-
+        this.setDescibeData(uuid, describeData);
     }
 
     /**