Introduce a new FixingsFacet to add save access to the current Km Values which are accessed by a String like a map must be checked for null. The new FixingsFacet adds a getCurrentKm method that abstracts the direct access to the CallContext and always returns a valid double value.

select.abflusstafel = SELECT ABFLUSSTAFEL_NR, \
                             ABFLUSSTAFEL_BEZ, \
                             GUELTIG_VON, \
                             GUELTIG_BIS, \
                             PEGELNULLPUNKT FROM ABFLUSSTAFEL WHERE MESSSTELLE_NR LIKE :number