In your example you don't need "e:" as you arne't using it. Also that
would be better written
EventWM(field != "f1", field != "f2")
Eval is not indexed, and thus slow - where as the first relies on field
constraints and is thus indexed and fast.
Mark
Demichelis Matteo wrote:
I solved writing a rule in this way:
rule "AND"
when
e : EventWM(field : field)
eval(field !="f1" && field !="f2")
then
System.out.println("RULE AND");
end
(similar to CLIPS "test conditional element").
Thanks.
matteo.
-----Messaggio originale-----
Da: Mark Proctor [mailto:[EMAIL PROTECTED]
Inviato: martedì 2 maggio 2006 17.36
A: [email protected]
Oggetto: Re: [drools-user] R: [drools-user] and with binding
think about it for a second:
a : Fact()
binds a variable to a Fact. How can you have a variable bound to two
facts? With 'or' its allowed, as it can bind to one Fact in the first
logic outcome and then to the other fact in the second logic outcome.
Mark
Demichelis Matteo wrote:
I tried, it compiles but the behaviour is not correct
because this LHS:
e : TestFact( field1 !="f1") && TestFact( field1 != "f2")
and this:
e : TestFact( field1 !="f1")
strangely match the same facts.
It seems the problem is the compiler not supporting the binding with a '(' that
follows.
The same with a "or with binding", the 3.15 example seems not supported.
-----Messaggio originale-----
Da: Christopher G. Stach II [mailto:[EMAIL PROTECTED]
Inviato: martedì 2 maggio 2006 17.05
A: [email protected]
Oggetto: Re: [drools-user] and with binding
Demichelis Matteo wrote:
Hello,
following the example 3.15 in JBoss Rules, "or with binding":
pensioner: ( Person(....) or Person(...) )
I wrote this rule using "and with binding":
rule "ClearUnknownDevice"
when
e : ( TestFact( field1 !="f1") && TestFact( field1 != "f2")
)
then
retract( e );
end
I got 2 compilation error:
unknown:8:6 mismatched token: [EMAIL PROTECTED],133:133='(',<21>,8:6];
expecting type
ID
unknown:8:76 Unexpected token ')'
perhaps "and with binding" is not supported yet?
thanks.
matteo,.
Try this:
rule "ClearUnknownDevice"
when
e : TestFact( field1 !="f1") && TestFact( field1 != "f2")
then
retract( e );
end
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