--- a/flys-backend/ChangeLog	Thu Sep 27 12:53:09 2012 +0000
+++ b/flys-backend/ChangeLog	Thu Sep 27 12:55:26 2012 +0000
@@ -1,3 +1,10 @@
+2012-09-27  Felix Wolfsteller <felix.wolfsteller@intevation.de>
+
+	Backend-part for fix of issue863.
+
+	* src/main/java/de/intevation/flys/importer/parsers/BedHeightEpochParser.java:
+	  Handle missing data points.
+
 2012-09-27  Felix Wolfsteller <felix.wolfsteller@intevation.de>
 
 	* src/main/java/de/intevation/flys/importer/ImportBedHeightEpoch.java:

--- a/flys-backend/src/main/java/de/intevation/flys/importer/parsers/BedHeightEpochParser.java	Thu Sep 27 12:53:09 2012 +0000
+++ b/flys-backend/src/main/java/de/intevation/flys/importer/parsers/BedHeightEpochParser.java	Thu Sep 27 12:55:26 2012 +0000
@@ -1,12 +1,9 @@
 package de.intevation.flys.importer.parsers;
 
-
 import java.math.BigDecimal;
 
 import java.text.ParseException;
 
-
-
 import org.apache.log4j.Logger;
 
 import de.intevation.flys.importer.ImportBedHeight;
@@ -14,32 +11,59 @@
 import de.intevation.flys.importer.ImportBedHeightEpochValue;
 
 
+/** Parses BedHeightEpochs from csv file. */
 public class BedHeightEpochParser extends BedHeightParser {
 
+    /** Our own logger. */
     private static final Logger log =
         Logger.getLogger(BedHeightEpochParser.class);
 
 
-
     @Override
     protected ImportBedHeight newImportBedHeight(String description) {
         return new ImportBedHeightEpoch(description);
     }
 
 
+    /**
+     * Handle a non-comment, none-Metadata line of csv file, adding
+     * ImportBedHeightEpochValues to the given ImportBedHeight object.
+     */
     @Override
     protected void handleDataLine(ImportBedHeight obj, String line) {
-        // TODO issue863: find gaps in data, analogous to 'single' case.
         String[] values = line.split(SEPERATOR_CHAR);
 
-        if (values == null || values.length < 2 || values[0].length() == 0 || values[1].length() == 0) {
+        if (values == null || values.length == 0 || values[0].length() == 0) {
+            // There might be quite some ";" found.
             //log.warn("Skip invalid data line: " + line);
             return;
         }
 
+        BigDecimal km;
+
+        try {
+            km = new BigDecimal(nf.parse(values[0]).doubleValue());
+        }
+        catch (ParseException e) {
+            log.warn("Error while parsing number from data row: " + line);
+            return;
+        }
+
+
+        // Handle "gap" lines like '255,0;'
+        if (values.length < 2) {
+            ImportBedHeightEpochValue value = new ImportBedHeightEpochValue(
+                km,
+                null
+            );
+
+            obj.addValue(value);
+            return;
+        }
+
         try {
             ImportBedHeightEpochValue value = new ImportBedHeightEpochValue(
-                new BigDecimal(nf.parse(values[0]).doubleValue()),
+                km,
                 new BigDecimal(nf.parse(values[1]).doubleValue())
             );