4:53 p.m.
Hello guys,
I really need your help.
I'm writing a DSL file in order to allow my application user to write their
simple rules.
I have queries of this typology:
$a: Data( )
$b: Year( ) from $a.years
$c: Person( ) from $b.persons
dsl mapping (inline version):
there are persons=$a: Data( ) $b: Year( ) from $a.years $c: Person( ) from
$b.persons
now if i would add attribute to person i can't, for example to get persons
over 18 years old.
If i write:
there are persons
- age more than 18
drools engine try to add attribute to Data object, probably because it is
first object in line.
To resolve this problem i should write query something like:
$c: Person( ) from ( Year( ).persons from Data( ).years )
In this way i can add attribute to Person instead of Data. Unfortunatly i
don't know how can i get it.
Someone can help me please.
Best Regards
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11:46 a.m.
Nobody can help me?
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12:52 p.m.
Gee, we all have work to do to earn our keep. If you provide the dough
you can have instant bread ;-)
I suggest you redesign your DSL with phrases like
There is a {Fact}
and a {FactA} from {FactB}'s {attribute}
Users would have to write these in individual lines. Then, adding the
"- with" doesn't create a problem.
Other than this, I don't see much hope for getting the constraint
where it belongs. Consider that *you* think right *now*, that it ought
to be in the first pattern, but s.o. else might want it in the middle
one...
-W
On 13/11/2013, braveheart85 <andrea.pacifico.85(a)gmail.com> wrote:
Nobody can help me?
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1:10 p.m.
Of course, you can just bypass the built in “-“ processing.
[condition][]There is a Person = $p: Person()
[condition][]The person is aged over "{age}” =$age: Integer(this > {age}) from
$person.age
Of course that does require that you’re careful about writing the DSLR, so that you always
bind a variable to Person() before using a phrase which expects that variable to exist.
btw … Apologies, but Integer(this > {age}) is almost certainly buggy syntax. I can’t
remember off-hand the best way to do that comparison. :-/
On 13 Nov 2013, at 11:52, Wolfgang Laun <wolfgang.laun(a)gmail.com> wrote:
Gee, we all have work to do to earn our keep. If you provide the
dough
you can have instant bread ;-)
I suggest you redesign your DSL with phrases like
There is a {Fact}
and a {FactA} from {FactB}'s {attribute}
Users would have to write these in individual lines. Then, adding the
"- with" doesn't create a problem.
Other than this, I don't see much hope for getting the constraint
where it belongs. Consider that *you* think right *now*, that it ought
to be in the first pattern, but s.o. else might want it in the middle
one...
-W
On 13/11/2013, braveheart85 <andrea.pacifico.85(a)gmail.com> wrote:
> Nobody can help me?
>
>
>
> --
> View this message in context:
>
http://drools.46999.n3.nabble.com/Problem-in-writing-rule-and-apply-DSL-t...
> Sent from the Drools: User forum mailing list archive at Nabble.com.
> _______________________________________________
> rules-users mailing list
> rules-users(a)lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
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1:20 p.m.
On 13/11/2013, Stephen Masters <stephen.masters(a)me.com> wrote:
Of course, you can just bypass the built in “-“ processing.
[condition][]There is a Person = $p: Person()
[condition][]The person is aged over "{age}” =$age: Integer(this > {age})
from $person.age
Of course that does require that you’re careful about writing the DSLR, so
that you always bind a variable to Person() before using a phrase which
expects that variable to exist.
btw … Apologies, but Integer(this > {age}) is almost certainly buggy syntax.
I can’t remember off-hand the best way to do that comparison. :-/
Integer( intValue > {age} )
-W
On 13 Nov 2013, at 11:52, Wolfgang Laun <wolfgang.laun(a)gmail.com> wrote:
> Gee, we all have work to do to earn our keep. If you provide the dough
> you can have instant bread ;-)
>
> I suggest you redesign your DSL with phrases like
> There is a {Fact}
> and a {FactA} from {FactB}'s {attribute}
>
> Users would have to write these in individual lines. Then, adding the
> "- with" doesn't create a problem.
>
> Other than this, I don't see much hope for getting the constraint
> where it belongs. Consider that *you* think right *now*, that it ought
> to be in the first pattern, but s.o. else might want it in the middle
> one...
>
> -W
>
> On 13/11/2013, braveheart85 <andrea.pacifico.85(a)gmail.com> wrote:
>> Nobody can help me?
>>
>>
>>
>> --
>> View this message in context:
>>
http://drools.46999.n3.nabble.com/Problem-in-writing-rule-and-apply-DSL-t...
>> Sent from the Drools: User forum mailing list archive at Nabble.com.
>> _______________________________________________
>> rules-users mailing list
>> rules-users(a)lists.jboss.org
>> https://lists.jboss.org/mailman/listinfo/rules-users
>>
> _______________________________________________
> rules-users mailing list
> rules-users(a)lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
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5:16 p.m.
Thank you I'll try these ways.
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5 comments
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Wolfgang Laun