--- a/flys-artifacts/src/main/java/de/intevation/flys/exports/fixings/FixChartGenerator.java	Thu Jul 19 09:37:52 2012 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/exports/fixings/FixChartGenerator.java	Thu Jul 19 11:40:59 2012 +0000
@@ -1,24 +1,22 @@
 package de.intevation.flys.exports.fixings;
 
-import org.w3c.dom.Document;
-
-import org.apache.log4j.Logger;
+import de.intevation.artifacts.ArtifactNamespaceContext;
+import de.intevation.artifacts.CallContext;
+import de.intevation.artifacts.common.utils.XMLUtils;
+import de.intevation.flys.exports.XYChartGenerator;
 
 import java.io.OutputStream;
 
-import de.intevation.artifacts.ArtifactNamespaceContext;
-import de.intevation.artifacts.common.utils.XMLUtils;
-import de.intevation.artifacts.CallContext;
-
-import de.intevation.flys.exports.XYChartGenerator;
+import org.apache.log4j.Logger;
+import org.w3c.dom.Document;
 
 public abstract class FixChartGenerator
 extends XYChartGenerator
 {
     private static Logger logger = Logger.getLogger(FixChartGenerator.class);
 
-    public static final Double INVALID_KM = Double.valueOf(-1d);
-
+    public static final double INVALID_KM = Double.valueOf(-1d);
+    public static final String CURRENT_KM = "currentKm";
     public static final String XPATH_CHART_CURRENTKM =
         "/art:action/art:attributes/art:currentKm/@art:km";
 
@@ -26,16 +24,16 @@
     public void init(Document request, OutputStream out, CallContext context) {
         super.init(request, out, context);
 
-        Double currentKm = getCurrentKmFromRequest(request);
+        double currentKm = getCurrentKmFromRequest(request);
 
         if (logger.isDebugEnabled()) {
             logger.debug("currentKm = " + currentKm);
         }
 
-        context.putContextValue("currentKm", currentKm);
+        context.putContextValue(CURRENT_KM, currentKm);
     }
 
-    public static Double getCurrentKmFromRequest(Document request) {
+    public static double getCurrentKmFromRequest(Document request) {
 
         String km = XMLUtils.xpathString(
             request,