[rules-users] Using trim in LHS cause "Exception executing predicate..."

[ferry97]

Hi,
I have a rule

rule "rule 1"
when
   Cheese(color.trim == "yellow")
then
   System.out.println("hmm.. its yellow");

will raise :

 org.drools.spi.ConsequenceException: org.drools.RuntimeDroolsException:
Exception executing predicate
org.drools.base.mvel.MVELPredicateExpression at 19adc2c

I suspect it's because of the "trim" function. Does it allowed ? Is there
any alternative ?
I need this function because "Cheese" is loaded from database, and all the
fields comes with space trailing.
Thanks
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