[rules-users] error when referening LHS->exists block var in RHS

[techy]

Thanks Edson.
1.I use drools 4.X and. for  following condition, drools gives compilation
error. I'm not sure what i do wrong. Some working example would help.
"ArrayList() from collect( Ticker( price == 20.00, timeInMillsec
before[1ms,10m] 1000000 ))"

2.If I just to want to find "close" ticker for given timestamp without
having "how close", I can think of writing some utility function in java
class and use it in drools. any other idea here?

Thanks again!


Edson Tirelli-3 wrote:
> 
>       As long as you can say "how close" you want using an absolute
> number,
> it is possible: let's say you want all tickers that happened up to 10
> minutes before a given timestamp:
> 
> rule "Pseudo rule"
> when
>  ArrayList() from collect( Ticker( price == 20.00, timeInMillsec
> before[1ms,10m] 1000000 ))
> then
> //do conseq
> end
> 
>     You can replace your timestamp (1000000) above with a Date variable or
> something like it.
> 
>     []s
>     Edson
> 
> 2009/2/17 techy <techluver007 at gmail.com>
> 
>>
>> I think I better more accurate info for my requirement.
>>
>> Is there way to get list of ( or single) Ticker that is close to given
>> timeInMillSec and exact price value ?
>>
>> Class Male
>> {
>>  long timeInMillsec;
>>  float price;
>>  String symbol
>> }
>>
>> rule "Pseudo rule"
>> when
>>  ArrayList() from collect( Ticker( price == 20.00 && timeInMillsec is
>> close
>> to 1000000 ))
>> then
>> //do conseq
>> end
>>
>>
>> Thanks.
>>
>>
>> techy wrote:
>> >
>> > That's makes Edson. Thank you.
>> >
>> > Is there way to to sort the facts collected using "collect" in LHS
>> itself?
>> > I could not find any hint in the documentation.
>> >
>> >
>> >
>> > Edson Tirelli-3 wrote:
>> >>
>> >>    That is expected behavior.
>> >>
>> >>    This is because quantifier CEs like "exists", "not" and "forall"
>> will
>> >> evaluate multiple facts at once. So, if your rule has 5 foos in the
>> >> working
>> >> memory, which one would you expect to print?
>> >>
>> >>    If you want to print each of them, remove the "exists"... if you
>> want
>> >> to
>> >> print all of them, use "collect" instead of "exists".
>> >>
>> >>    []s
>> >>    Edson
>> >>
>> >> 2009/2/17 techy <techluver007 at gmail.com>
>> >>
>> >>>
>> >>> I get $foo can't be resolved error for following rule. Some guidance
>> is
>> >>> appreciated to reference $foo without error.
>> >>>
>> >>> Rule "Foo rule"
>> >>> when
>> >>>   exists( $foo: Foo())
>> >>> then
>> >>>  System.out.println($foo);
>> >>> end
>> >>>
>> >>> Thanks in advance.
>> >>> --
>> >>> View this message in context:
>> >>>
>> http://www.nabble.com/error-when-referening-LHS-%3Eexists-block-var-in-RHS-tp22063253p22063253.html
>> >>> Sent from the drools - user mailing list archive at Nabble.com.
>> >>>
>> >>> _______________________________________________
>> >>> rules-users mailing list
>> >>> rules-users at lists.jboss.org
>> >>> https://lists.jboss.org/mailman/listinfo/rules-users
>> >>>
>> >>
>> >>
>> >>
>> >> --
>> >>  Edson Tirelli
>> >>  JBoss Drools Core Development
>> >>  JBoss, a division of Red Hat @ www.jboss.com
>> >>
>> >> _______________________________________________
>> >> rules-users mailing list
>> >> rules-users at lists.jboss.org
>> >> https://lists.jboss.org/mailman/listinfo/rules-users
>> >>
>> >>
>> >
>> >
>>
>> --
>> View this message in context:
>> http://www.nabble.com/error-when-referening-LHS-%3Eexists-block-var-in-RHS-tp22063253p22067020.html
>> Sent from the drools - user mailing list archive at Nabble.com.
>>
>> _______________________________________________
>> rules-users mailing list
>> rules-users at lists.jboss.org
>> https://lists.jboss.org/mailman/listinfo/rules-users
>>
> 
> 
> 
> -- 
>  Edson Tirelli
>  JBoss Drools Core Development
>  JBoss, a division of Red Hat @ www.jboss.com
> 
> _______________________________________________
> rules-users mailing list
> rules-users at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
> 
> 

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