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

[Anstis, Michael (M.)]

What dialect do your rules use?
 
You could also simplify the logic using DeMorgans Theorem (which might
be troublesome to accomplish programmatically)
 
I don't know whether your example is flawed as the brackets don't match,
but assuming you mean something like this:-
 
(NOT (G13.1 IN ("1","2","3") OR (G250.8 = Y)))

 

You can re-write this as

 

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

 

With kind regards,

 

Mike

 



________________________________

	From: rules-users-bounces at lists.jboss.org
[mailto:rules-users-bounces at lists.jboss.org] On Behalf Of JOSHI, GAURAV
	Sent: 13 September 2007 08:20
	To: Rules Users List
	Subject: RE: [rules-users] How to use not operator in drool.
	
	

	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
	  Office: +55 11 3529-6000
	  Mobile: +55 11 9287-5646
	  JBoss, a division of Red Hat @ www.jboss.com 

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