3:11 a.m.
Or what about having a rule that creates the substring?
Class SupplierCode {
private String code;
private SupplierView parent;
public SubString(SupplierView parent, String code) {
this.code = code;
this.parent = parent;
}
public String getCode() {
return this.code;
}
public SupplierView getParent() {
return this.parent;
}
}
rule "suppliercode"
when
$sv : SupplierView( $sc : suppCode )
then
insert(new SupplierCode($sv, $sc.substring(4, 6)));
end
rule "main"
when
$sv : SupplierView(corporate == true)
$sc : SupplierCode( code in ('25, '30'), parent == $cs )
then
ValidationErrorFacade.getInstance().registerError($cs, new
ValidationError("Headquarter Supplier Code should end on 25 or 30."));
end
This way you are also making the business rule as to what supplier codes
to accept a Drools rule (and no use of eval!)
(Sorry, a boring day at work and I felt an urge to contribute!)
Mike
________________________________
From: rules-users-bounces(a)lists.jboss.org
[mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Manukyan,
Sergey
Sent: 12 July 2007 21:40
To: Rules Users List
Subject: RE: [rules-users] how to create local variable
Thank you Edson,
I liked the solution with matches, it is much cleaner....
-Sergey
________________________________
From: rules-users-bounces(a)lists.jboss.org
[mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Edson Tirelli
Sent: Thursday, July 12, 2007 4:19 PM
To: Rules Users List
Subject: Re: [rules-users] how to create local variable
It is not possible to assign the result of an arbitrary
method call to a variable right now. So, your best option is probably to
do (please note the use of inline-eval):
rule "SupplierView: Headquarter Supplier Code should end on 25
or 30."
when
$cs : SupplierView(corporate == true, eval(
suppCode.substring(4, 6).equals( "25" ) || suppCode.substring(4,
6).equals( "30" ) ) )
then
ValidationErrorFacade.getInstance().registerError($cs, new
ValidationError("Headquarter Supplier Code should end on 25 or 30."));
end
A more clean solution is to use "matches" operator. If your
rule states that Supplier Code must END with 25 or 30, you can do:
rule "SupplierView: Headquarter Supplier Code should end on 25
or 30."
when
$cs : SupplierView(corporate == true, suppCode
matches ".*25" || matches ".*30" )
then
ValidationErrorFacade.getInstance().registerError($cs, new
ValidationError("Headquarter Supplier Code should end on 25 or 30."));
end
Hope it helps.
[]s
Edson
2007/7/12, Manukyan, Sergey < SManukyan(a)lear.com>:
Folks,
I have a rule where I am repeating part of it twice :
($cs.getSuppCode().substring(4, 6)), and I would like to replace it with
variable... how can I do that? The solution with "in" doesn't worl
because it is a java code needed to perform calculations for
variable.....
Please see the rule below:
rule "SupplierView: Headquarter Supplier Code should end on 25
or 30."
when
$cs : SupplierView(corporate == true)
eval($cs.getSuppCode().substring(4, 6) == "25" ||
$cs.getSuppCode().substring(4, 6) == "30")
then
ValidationErrorFacade.getInstance().registerError($cs, new
ValidationError("Headquarter Supplier Code should end on 25 or 30."));
end
Thanks,
-Sergey
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Edson Tirelli
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