11:43 a.m.
I am working on a project, using templates to generate all my rules. I have
one problem though, I wanna parse my arguments to the template as a
ArrayList, and do somthing like this:
template header
ruleId
args
package dk.prks
import com.poc.entity.Bill;
import com.poc.entity.BillLine;
import com.poc.entity.Description;
import java.util.ArrayList;
template "01"
rule "@{ruleId}_(a){row.rowNumber}"
dialect "mvel"
when
$bill : Bill ($line : lines) and
BillLine( service == @{args.get(0)}, $lineNr : lineNr) from $line and
BillLine( service == @{args.get(1)}, lineNr < $lineNr) from $line
then
$bill.setColor(1);
end
end template
However, this is not possible. Furthermore I want to stretch that
performance is an issue, and i want the generated file to only contain the
values from the list, and not make any look ups in the array when running my
rules
--
View this message in context:
http://drools.46999.n3.nabble.com/Drools-templates-header-arguments-tp402...
Sent from the Drools: User forum mailing list archive at Nabble.com.
12:11 p.m.
afaik that's not possible.
Basically the templates replace the value for @{param} with param.toString() (that's
why your approach is not working).
Regarding your concerns about performance: the templates are translated into rules once
-> afterwards there is no connection between the variables and the rules in
KnowledgeBase.
You could instead write a module that replaces the @{param} fields with values from your
arrayList within your rules (e.g. loading the rules from a file into string, then use
regex or whatever suits you best).
Then just insert the rules somewhat like this:
String myRules = "rule "test" when @{arr[1]}>x... then ... ";
String parameterizedRules =MyTemplateBuilder.build(myRules, yourParams);
Reader rdr = new StringReader(parameterizedRules);
kbuilder.add(ResourceFactory.newReaderResource(rdr), ResourceType.DRL);
- Alex
On 25 Nov 2013, at 11:43, petert <peter.j.troelsen(a)gmail.com> wrote:
I am working on a project, using templates to generate all my rules.
I have
one problem though, I wanna parse my arguments to the template as a
ArrayList, and do somthing like this:
template header
ruleId
args
package dk.prks
import com.poc.entity.Bill;
import com.poc.entity.BillLine;
import com.poc.entity.Description;
import java.util.ArrayList;
template "01"
rule "@{ruleId}_(a){row.rowNumber}"
dialect "mvel"
when
$bill : Bill ($line : lines) and
BillLine( service == @{args.get(0)}, $lineNr : lineNr) from $line and
BillLine( service == @{args.get(1)}, lineNr < $lineNr) from $line
then
$bill.setColor(1);
end
end template
However, this is not possible. Furthermore I want to stretch that
performance is an issue, and i want the generated file to only contain the
values from the list, and not make any look ups in the array when running my
rules
--
View this message in context:
http://drools.46999.n3.nabble.com/Drools-templates-header-arguments-tp402...
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
1:34 p.m.
If performance is an issue, make sure that the rule doesn't fire repeatedly
or creates some overhead, due to large sizes of Bill.lines and multiple
occurrences of args(0) and args(1) in ascending line order.
-W
On 25/11/2013, petert <peter.j.troelsen(a)gmail.com> wrote:
I am working on a project, using templates to generate all my rules.
I have
one problem though, I wanna parse my arguments to the template as a
ArrayList, and do somthing like this:
template header
ruleId
args
package dk.prks
import com.poc.entity.Bill;
import com.poc.entity.BillLine;
import com.poc.entity.Description;
import java.util.ArrayList;
template "01"
rule "@{ruleId}_(a){row.rowNumber}"
dialect "mvel"
when
$bill : Bill ($line : lines) and
BillLine( service == @{args.get(0)}, $lineNr : lineNr) from $line and
BillLine( service == @{args.get(1)}, lineNr < $lineNr) from $line
then
$bill.setColor(1);
end
end template
However, this is not possible. Furthermore I want to stretch that
performance is an issue, and i want the generated file to only contain the
values from the list, and not make any look ups in the array when running
my
rules
--
View this message in context:
http://drools.46999.n3.nabble.com/Drools-templates-header-arguments-tp402...
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
5:07 p.m.
Thanks guys.. :)
2013/11/25 Wolfgang Laun <wolfgang.laun(a)gmail.com>
If performance is an issue, make sure that the rule doesn't fire
repeatedly
or creates some overhead, due to large sizes of Bill.lines and multiple
occurrences of args(0) and args(1) in ascending line order.
-W
On 25/11/2013, petert <peter.j.troelsen(a)gmail.com> wrote:
> I am working on a project, using templates to generate all my rules. I
have
> one problem though, I wanna parse my arguments to the template as a
> ArrayList, and do somthing like this:
>
> template header
>
> ruleId
> args
>
> package dk.prks
> import com.poc.entity.Bill;
> import com.poc.entity.BillLine;
> import com.poc.entity.Description;
> import java.util.ArrayList;
>
> template "01"
>
>
> rule "@{ruleId}_(a){row.rowNumber}"
> dialect "mvel"
> when
> $bill : Bill ($line : lines) and
> BillLine( service == @{args.get(0)}, $lineNr : lineNr) from $line
and
> BillLine( service == @{args.get(1)}, lineNr < $lineNr) from $line
>
> then
> $bill.setColor(1);
>
> end
>
> end template
> However, this is not possible. Furthermore I want to stretch that
> performance is an issue, and i want the generated file to only contain
the
> values from the list, and not make any look ups in the array when running
> my
> rules
>
>
>
> --
> View this message in context:
>
http://drools.46999.n3.nabble.com/Drools-templates-header-arguments-tp402...
> 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
3868
days inactive
3868
days old
3 comments
4 participants
participants (4)
-
Alexander Wolf -
Peter Troelsen -
petert
-
Wolfgang Laun