I'm not sure you can nest rules, you are thinking too procedural, but you
can extend conditions/lhs from other rules. Here is an example from the
test case in the drools source "extend_rule_test.drl" that may help you.
rule "test rule 1"
enabled false
when
c: Cheese( type == "stilton" )
then
list.add( new String ("rule 1") );
end
rule "test rule 2" extends "test rule 1"
enabled false
when
Cheese( price <= 6.00) from c
then
list.add( new String ("rule 2") );
end
rule "test rule 3" extends "test rule 2"
when
Cheese( price > 1.00 ) from c
then
list.add( new String ("rule 3") );
end
Rule 1 & 2 are disabled, but rule 3 in the rete network will have all 3
LHS (conditions). So the above would render.
rule "test rule 3"
when
c: Cheese( type == "stilton" )
Cheese( price <= 6.00) from c
Cheese( price > 1.00 ) from c
then
list.add( new String ("rule 3") );
end
This was modeled more after how a programming language would have one
class extend another, but it only inherits the LHS.
-Michael
P.S. I believe this is available only in trunk at this time, but will be
out with the next 5.x release.
From: rules-dev-bounces(a)lists.jboss.org
[mailto:rules-dev-bounces@lists.jboss.org] On Behalf Of David Sinclair
Sent: Wednesday, November 12, 2008 8:50 AM
To: m_dilipkumar2006(a)yahoo.co.in; Rules Dev List
Subject: Re: [rules-dev] Regarding Nested Rules in Drools 4.0.7
I think u are thinking about this in the wrong sense. You don't want to
call another rule. You can assert a fact that will cause that other rule
to fire.
On Wed, Nov 12, 2008 at 9:45 AM, M.DILIP KUMAR
<m_dilipkumar2006(a)yahoo.co.in> wrote:
Hi All,
I got many idea by using this group. Now i want one clarification
regarding Nested rule.
If any one having sample code for nested Rule means Pls send reply along
this mail.
Acutally i want rule like
Rule : "nested Rule"
When
#Condition is true
Then
CALL another RULE ...!!!!
Here i want pass some argument to that nested rule
is it possible ?
End
Help me regarding this and send sample code if possible please
Defeat yourself today!
____________________________
Error! Filename not specified.DILIP KUMAR.M
_____
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