piggybank apachelogparser.DateExtractor problem

[Johannes Rußek]

Hello everybody,
I've been trying to use 
org.apache.pig.piggybank.evaluation.util.apachelogparser.DateExtractor 
from piggybank that comes with pig 0.6.0, but i don't seem to be able to 
set the output format.
whatever i use as the argument in the construct:

DEFINE MyDateExtractor 
org.apache.pig.piggybank.evaluation.util.apachelogparser.DateExtractor('HH:mm:ss');

i only ever get yyyy-MM-dd back.
however, when i change DEFAULT_OUTGOING_DATE_FORMAT in 
main/java/org/apache/pig/piggybank/evaluation/util/apachelogparser/DateExtractor.java 
to something like 'yyyy-MM-dd-HH' it is able to output the right format.
Am i doing something wrong?

regards,
Johannes