Re: [rules-users] Testing the count of a pattern binding variable
Assuming that you don't have an infinite variety of accumulations you're trying to
use, something I have done previously is to create DRL technical rule to generate
accumulated values, which the DSL then uses as constraints.
i.e.
rule "Generate sensor counts"
when
$sensor : Sensor()
accumulate($sensor; $count:count(1); $count >3)
then
insert(new SensorCount($count));
end
… then your DSL can be something simple like:
When there are more than 5 sensors = SensorCount(count > 5)
On 19 Feb 2013, at 06:21, Wolfgang Laun <wolfgang.laun(a)gmail.com> wrote:
What (I think) you are trying to do is not possible.
But I wouldn't say that it cannot be done using DSL. What sort of
collect/accumulate do you need?
-W
On 18/02/2013, David R Robison <drrobison(a)openroadsconsulting.com> wrote:
> I am developing rules using DSL so, from what I understand, I cannot use
> collect and accumulate in some of my DSL definitions (especially when
> using clauses that begin with a hyphen). So what I want to do is to test
> the count of a pattern binding variable, such as
>
> when
> $sensors : Sensor()
> accumulate($sensor; $count : count(1); $count > 3)
> then
> ...
>
> Is something like this possible? I cannot seem to make it work.
> David
>
> --
>
> David R Robison
> Open Roads Consulting, Inc.
> 103 Watson Road, Chesapeake, VA 23320
> phone: (757) 546-3401
> e-mail: drrobison(a)openroadsconsulting.com
> web: http://openroadsconsulting.com
> blog: http://therobe.blogspot.com
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> http://www.xulonpress.com/bookstore/bookdetail.php?PB_ISBN=9781597816526
>
>
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