[rules-users] How to use not operator in drool.

[Mark Proctor]

Tim.Nguyen at expeditors.com wrote:
> I thought when you use eval, it is Java, not mvel. So i think this should
> work:   eval (! (Map (.....
>
>   
eval will use the language of dialect you specify for the rule.
> Tim
>
>
>
>                                                                            
>              Gaurav2007                                                    
>              <gaurav.a.joshi at c                                             
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>                                        [rules-users] How to use not        
>                                        operator in drool.                  
>              09/12/2007 08:49                                              
>              AM                                                            
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>
> Hi ALL,
>
> I am using drool4.0.1 in my application i am able to use IN,OR,AND operator
> but i am facing problem in using not operator.
>
> my requirement of not operator is just like a not gate.
>
> the way i am using it is :
>
> eval(not((Map( this["city"] !="mumbai"))||(Map( this["city"] =="delhi"))))
>
>
> so can you please help me out to solve this problem:
> should i use not operator or some thing else in drool.
>
> Thanks,
>
>
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