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

[JOSHI, GAURAV]

Thank's for your sugession of using "not in" instead of "not" but my
problem is that "not" can also come without "in".

 

Actually I am making a generator of rule file from expression like

 ((NOT (ENDS WITH (G10.2, ",")))

 

 ((NOT (G13.1 IN ("1","2","3"))) OR (G250.8 = Y)))

 

Where G13.2, G250.8, G10.2 are variables coming from a map inserted in
working memory.

 

I am accessing these variables from map.

 

My rules are as follows

 

This rule is working fine.

 

rule "Editable_G10.3"

when

 

 ((Map( this["G10.3"] !=8))||(Map( this["G10.2"] ==19)))

 

then

System.out.println("comming
here----------------------------------------------------->");

End

 

This is not working

 

rule "Mandatory_G10.3"

when

 (not((Map( this["G10.3"] !=8))||(Map( this["G10.2"] ==19)))) 

Then

System.out.println("comming
here----------------------------------------------------->");

End

 

In also tried following approaches:

1)      eval(not((Map( this["G10.3"] !=8))||(Map( this["G10.2"] ==19))))


 

2) eval(!((Map( this["G10.3"] !=8))||(Map( this["G10.2"] ==19)))) 

 

But in both cases it is giving same error:

org.drools.rule.InvalidRulePackage: Rule Compilation error : [Rule
name=ValidationRuleExp_G10.3, agendaGroup=MAIN, salience=0,
no-loop=false]

 
com/telekurs/nva/mde/fe/ak/validation/Rule_ValidationRuleExp_G10_3_0.jav
a (11:495) : Cannot use this in a static context 

 
com/telekurs/nva/mde/fe/ak/validation/Rule_ValidationRuleExp_G10_3_0.jav
a (11:500) : Type mismatch: cannot convert from String to int

 

I am trying to find out some general concept so that I can change just
achieve the functionality of not.

 

Thanks

Gaurav 

 

________________________________

From: rules-users-bounces at lists.jboss.org
[mailto:rules-users-bounces at lists.jboss.org] On Behalf Of Edson Tirelli
Sent: Wednesday, September 12, 2007 10:20 PM
To: Rules Users List
Subject: Re: [rules-users] How to use not operator in drool.

 


   Remove your "eval" and use "or" instead of "||" for the OR CE.

   Although, I feel that this is not what you want... what you want is
simply:

when
    Map( this['city'] not in ( "mumbai", "delhi" ) ) 
then
    //...
end
 
    []s
    Edson

2007/9/12, Gaurav2007 <gaurav.a.joshi at capgemini.com>:


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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  Edson Tirelli 
  Software Engineer - JBoss Rules Core Developer
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