Forgetting the use of Drools how do you determine (programmatically) which is the main contract and which are related? Once you can answer this your Drools solution should become self evident.
An attribute
when
$mc: Contract(type == "main" )
then
#rule fired over "the" main contract
end
when
$rc: Contract(type == "related" )
then
#rule fired over "a" related contract
end
A relationship
when
$mc: Contract( )
then
#rule fired over "the" main contract
end
when
$mc: Contract( )
$rc: Contract( ) from $mc.contracts
then
#rule fired over "a" related contract
end
_____
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Massi Gmail
Sent: 05 January 2008 11:33
To: Rules Users List
Subject: Re: [rules-users] Checking fact "id"
ok
But i think I do not need to differentiate them.
I try to explain it better.
I have got a set of "Contract" class Facts. All of them inserted into the
working memory.
But Just one of them is the "main contract", all the others all "related
contracts".
So , when i write a rule I need to distinguish between a "main contract"
(which is unique along the session)
and a "related contract".
I should write rules like the followings:
when
$mc: Contract() from maincontract
then
#rule fired over "the" main contract
end
when
$rc: Contract() from relatedcontract
then
#rule fired over "a" related contract
end
I think the only solution to do that is to make "maincontract" and
"relatedcontracr" globals.
But, if I make them globals, then the rule engine will not be notified about
their changes and
I do want it to be notified about it.
Should I make them "globals" and "facts" as well?
Can globals be inserted into the WM as well? Is it too horrible? :D
Thank u anyway.
Massi
----- Original Message -----
From: Edson Tirelli <mailto:[EMAIL PROTECTED]>
To: Rules Users List <mailto:[email protected]>
Sent: Saturday, January 05, 2008 12:00 PM
Subject: Re: [rules-users] Checking fact "id"
What attribute differentiates A1 from A2?
Such scenarios usually are solved by an additional constraint...
[]s
Edson
2008/1/4, Massi Gmail < [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> >:
Hi guys,
Now I am strugglin' with "fact id checking" or whatever we can call it....
:D
Let's take into account the followong scenario:
I have class A (it's just a name) javabeans to be inserted into the WM.
I define two objects of class A: A1 and A2.
Somewhere I do "insert(A1)" and "insert(A2)" ( let's say I do it in the same
package of R1 and R2..see below...)
Then I define two different rules R1 and R2 that reason over class "A" facts
(let's say R1 and R2 are in the same package) .
The point is.... I want R1 to fire only on A1 and R2 only on A2.
Is that possible in drools? Is there a sort of "fact id" I can reason over?
I do not think globals will be of any help, cause in the guide i have read
that globals should never be used within LHS.
We should never reason over globals.
Let me know.
Massi
_______________________________________________
rules-users mailing list
[email protected]
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
_____
_______________________________________________
rules-users mailing list
[email protected]
https://lists.jboss.org/mailman/listinfo/rules-users
smime.p7s
Description: S/MIME cryptographic signature
_______________________________________________ rules-users mailing list [email protected] https://lists.jboss.org/mailman/listinfo/rules-users
