[rules-users] Using from
Edson Tirelli
tirelli at post.com
Fri Jul 18 10:59:38 EDT 2008
Hey Aziz,
Try like this:
when
$f : Father( age > 45 )
exists( Son( age > 5 ) from $f.sons )
then
// $f is older than 45 and has at least one son older than 5
end
Happy drooling,
[]s
Edson
2008/7/17 Aziz Boxwala <boxwala at yahoo.com>:
> I have the following class structure.
>
> Class GrandFather {
> List<Father> fathers;
> public List<Father> getFathers() {return fathers;}
> }
>
> Class Father {
> int age;
> List<Son> sons;
> public int getAge() {return age;}
> public List<Son> getSons() {return sons;}
> }
>
> Class Son {
> int age;
> public int getAge() {return age;}
> }
>
> I'd like to write a rule that finds all the Fathers who have age > 45 and
> have Sons where the son's age is greater than 5. But I can't figure out how
> to use "from" to iterate over father first and then over son.
>
> Any help will be greatly appreciated.
>
> Thanks,
> --Aziz
>
>
>
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>
>
--
Edson Tirelli
JBoss Drools Core Development
JBoss, a division of Red Hat @ www.jboss.com
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