Q2:
So the rule would be something like:
rule "RAM type"
when
$product: Product(type == "laptop");
then
//you are looking for the best way to set valid RAM types in the then part
of the rule?
$product.setRamType("DDR");
//or
$product.setValidRamOptions( getValidRamOptions("DDR"));
end
where getValidRamOptions would be a custom function included through 'import
function' so you can then load the choices from some where else. Or if
RamOptions were an object in memory you could have a rule like:
rule "RAM type"
when
$product: Product(type == "laptop");
$ramOptions: RAMOptions(type == "DDR");
then
$product.setValidRamOptions( $ramOptions.getList());
end
Wendy
________________________________
From: Abhay B. Chaware <[email protected]>
To: Rules Users List <[email protected]>
Sent: Fri, May 6, 2011 8:33:53 AM
Subject: Re: [rules-users] Basic rules question
Q1. Thanks , that makes sense.
Q2. I am trying to modify facts, based on events. So in the example given, I
am saying if user selects "laptop" then only "DDR" type RAM should be available
to choose from, in the RAM category.
Thanks
abhay
________________________________________
From: [email protected] [[email protected]]
On Behalf Of Wendy Mungovan [[email protected]]
Sent: Friday, May 06, 2011 5:47 PM
To: Rules Users List
Subject: Re: [rules-users] Basic rules question
Abhay,
Q1: I think that this will depend on how many different products you have.
If there is a small number it is more straight forward to have a rule for each
one (so the 2nd option). This allows all you logic to be in one place. If
there are a large number of products and writing a rule for each one is
intractable you probably would want to look into some generalizations of the
rules. Is that helpful?
Q2: I'm not quite sure what you are getting at in Q2. Are you trying to
write
validation rules or rules that are modifying the facts?
Wendy
________________________________
From: Abhay B. Chaware <[email protected]>
To: "[email protected]" <[email protected]>
Sent: Fri, May 6, 2011 4:59:46 AM
Subject: [rules-users] Basic rules question
Hi
I am a newbie to rule based applications and trying to get the concept of
rules.
I have couple of questions about rules to start with, not specifically about
Drools though.
Q1 - Should rules be data/model specific or can/should they be generic or both
==========================================================
e.g.
If selected product “TYPE” is “laptop”, then category “RAM” should have all
“DDR” type items compatible ( selecting items matching certain property )
OR
If selected product is “IBM T42”, then category “RAM” should have “512MB DDR” ,
“1024MB DDR”, “2048MB DDR” compatible. ( assigning individual items in rules )
OR
Combination of both
Q2 – How should be the data modeled in above case
==========================================================
e.g.
in product master, each item ( e.g. T40, T42 ) should have a “TYPE” ( e.g.
desktop or laptop ) , all items in category “RAM” should have a “TYPE” ( e.g.
DDR ) and then control the assignment of RAM options to the PRODUCT through
Rule
using “DDR” type ?
OR
in product master, each item ( e.g. T40, T42 ) should have a “TYPE” ( e.g.
desktop or laptop ) , all items in category “RAM” should have a
“compatibleProduct” column ( e.g. desktop or laptop ) and control the
assignment
of RAM to PRODUCT through “dynamic” rules by selecting all the RAMs by passing
the “TYPE” of the product to the database handler.
Am I making my point clear ?
Thanks
Abhay
This message contains information that may be privileged or confidential and is
the property of the KPIT Cummins Infosystems Ltd. It is intended only for the
person to whom it is addressed. If you are not the intended recipient, you are
not authorized to read, print, retain copy, disseminate, distribute, or use
this
message or any part thereof. If you receive this message in error, please
notify
the sender immediately and delete all copies of this message. KPIT Cummins
Infosystems Ltd. does not accept any liability for virus infected mails.
_______________________________________________
rules-users mailing list
[email protected]
https://lists.jboss.org/mailman/listinfo/rules-users
_______________________________________________
rules-users mailing list
[email protected]
https://lists.jboss.org/mailman/listinfo/rules-users
