Just guessing, but is�PatternEntryPropertyWildcard defined inside Assignment?
When you write
�� Assignment(null == $shiftType)
�
You are writing a Field Constraint over Assignment. So, the first element of the constraint should be a field from Assignment, but you are putting "null". I think that's your error there.

Best,�

On Sun, May 30, 2010 at 8:50 AM, Geoffrey De Smet <ge0ffrey.spam@gmail.com> wrote:
This works in DRL:
� Assignment(
� � � (PatternEntryPropertyWildcard.ANY == $shiftTypeWildcard)
� � � � � || (shiftType == $shiftType)
� � � ...
� )
But this doesn't work in DRL:
� Assignment(
� � � (null == $shiftType)
� � � � � || (shiftType == $shiftType)
� � � ...
� )
It says "no viable alternative at input 'null' in rule"

Is there a specific reason why enum literals work on that spot and the
null literal doesn't?


Here's the full stacktrace:

Exception in thread "main" java.lang.IllegalStateException: There are
errors in the scoreDrl's:[536,8]: [ERR 101] Line 536:8 no viable
alternative at input ')' in rule "unwantedPatternShiftType2DaysPattern"
in pattern ShiftType2DaysPattern[542,13]: [ERR 101] Line 542:13 no
viable alternative at input 'null' in rule
"unwantedPatternShiftType2DaysPattern" in pattern Assignment[544,12]:
[ERR 102] Line 544:12 mismatched input '$employee' expecting ')' in rule
"unwantedPatternShiftType2DaysPattern" in pattern Assignment[544,32]:
[ERR 102] Line 544:32 mismatched input ',' expecting '(' in rule
"unwantedPatternShiftType2DaysPattern" in pattern employee[545,8]: [ERR
102] Line 545:8 mismatched input ')' expecting '(' in rule
"unwantedPatternShiftType2DaysPattern" in pattern employee in pattern
shiftDateDayIndex[547,13]: [ERR 101] Line 547:13 no viable alternative
at input 'null' in rule "unwantedPatternShiftType2DaysPattern" in
pattern employee in pattern Assignment


--
With kind regards,
Geoffrey De Smet

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