Terry,
As I know this very alike as the drools implementation to resolve this so teorically this is not necesary as you set the right
configuration on drools.
You can use System.identityHashCode(obj) to compare to instances of the same object, so the rule can be like
this:
rule "compare"
when
$f1: Foo()
$f2: Foo( $sysId -> ( System.identityHashCode($f1) < System.identityHashCode($f2)))
then
I didnt check this code, so maybe the syntax can be wrong... but thas the idea...
Greetings.
On 16-04-2007, at 15:28, Terry Laurenzo wrote:
This may be a silly question, but I had taken the non-self-joining nature of Drools for granted. Aside from disabling the option in RuleBaseConfiguration, how would one write a rule that would not self-join (ie. the old behavior)?
(Say I wanted two different facts to match:
when
Foo()
Foo()
instead of the new default which allows the same fact to match)
Thanks.
Terry
On Mar 26, 2007, at 12:26 PM, Edson Tirelli wrote:
Michael,
In 3.1 the default is now to allow self joins (we need to add BIG
warnings to the documentation due to this change) and an option was
added to RuleBaseConfiguration to remove self joins.
[]s
Edson
Michael Neale wrote:
> I know that we by default remove self joins, ie:
>
> when
> Foo()
> Foo()
>
> will not match for the same instance of Foo - is it possible to turn
> that off? I know we talked about it at one point, not sure what the
> latest position is (someone was asking me and I can't recall what our
> final position is). FYI Jess and Jrules both self join by default.
>
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--
Edson Tirelli
Software Engineer - JBoss Rules Core Developer
Office: +55 11 3124-6000
Mobile: +55 11 9218-4151
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Edson Tirelli
Software Engineer - JBoss Rules Core Developer
Office: +55 11 3124-6000
Mobile: +55 11 9218-4151
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