[rules-users] RE: Is the future avail in 4.0

[Michael Anstis]

(1) Theres nothing stopping you using a singleton to hold "state", so this
provides what you want:-

rule "1"
when
$o : AnObject( someField == someCriteria )
then
boolean someFlag = true;
insert(new State( someFlag ) );
end

rule "2"
when
State (someFlag == true )
$o : AnotherObject ( )
then
//something else
end

You could also have the first check activate another AgendaGroup, for
example:-

rule "1"
when
$o : AnObject( someField == someCriteria )
then
drools.setFocus("SomeOtherGroup");
end

rule "2"
agenda-group SomeOtherGroup
when
$o : AnotherObject ( )
then
 //something else
end

(2) I believe the ObjectTypeNode filters based on "Class.isInstance()" and
therefore you should be able to code rules based upon the sub-class and
insert super-classes.

With kind regards,

Mike


On 06/10/2007, Sikkandar Nawabjan <Sikkandar.Nawabjan at ustri.com> wrote:
>
> Hi,
> I have couple of questions
>
> 1) I want to validate a Object and based upon certain condition set the
> flag and that flag available in my working memory context so that all the
> rules will execute based on the value of this flag. Is there any way to set
> the Global variable in working memory environment and use it in predicate
> logic.
> I beleive passing Global variable using setGLobal() is possible but we
> can't use it in predicate logic.
>
> 2) my second quetion is i have 2 classes say
>
> Public class B extends Class A{
>
> private boolean  flag;
>
>
> }
>
>
> am validating my rule using of type B.
> But i want to assert object of class A. in normal java we do
> downcasting  B b = (B)obj;
> if i don't do that will downcast will happen at the working memory side
> automatically??????????
>
>
> Basha
>
>
>
> _______________________________________________
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>
>
>
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