sorry, it doesn't run, the eval() is not considered.
I used the workaround found by George ("Rule Compilation Error"):
rule "AND"
when
ev : EventWM(field : field)
eval(ev != null && field !="f1" && field !="f2" )
then
System.out.println( "RULE AND" );
retract( ev );
end
but it still doesn't run (a fact like: EventWM(field="f1") matches the LHS)
how to write a similar test?
Thank you.
matteo.
-----Messaggio originale-----
Da: Demichelis Matteo
Inviato: martedì 2 maggio 2006 18.33
A: 'user@drools.codehaus.org'
Oggetto: R: [drools-user] R: [drools-user] and with binding
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: user@drools.codehaus.org
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: user@drools.codehaus.org
> 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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