[rules-users] checking for complex conditions

[Edson Tirelli]

   Jai,

   You can try:

rule "Foo check with inline eval"
    when
        Foo( eval( a - (b + c) > 0 ) )
    then
          <do actions>
 end

   Or, what is better IMO:

rule "Foo check with return value predicate"
    when
        Foo( a > ( b + c ) )
    then
          <do actions>
 end

    Hope it helps.

    []s
    Edson


2008/3/4, Jai Vasanth <jaivasanth at gmail.com>:
>
> Hi,
>
>
>  Suppose I have a class Foo with integers a, b  and c  ( methods getA
> getB and getC respectively ) and I Want to check if an object of Foo
> satisfies
>
> a - (b + c) > 0
>
> Is this the best way  I go about doing this ?
>
> rule "Foo check"
>     when
>         Foo( varA : a , varB:b, varC:c )
>         eval( varA - (varB + varC) > 0 )
>     then
>           <do actions>
>  end
>
>
>
> Writing this as
>
> rule "Foo check"
>     when
>         Foo( a - (b + c) > 0 )
>     then
>           <do actions>
>  end
>
> doesnt seem to work. Its not able to find the variables (a, b and c ) from
> the getA getB and get C methods.
>
> Thanks
>
> Jai
>
> _______________________________________________
> rules-users mailing list
> rules-users at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
>


-- 
  Edson Tirelli
  JBoss Drools Core Development
  Office: +55 11 3529-6000
  Mobile: +55 11 9287-5646
  JBoss, a division of Red Hat @ www.jboss.com
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.jboss.org/pipermail/rules-users/attachments/20080304/ecfd6a39/attachment.html