Re: [rules-users] Inconsistent behavior between LHS and RHS ...
Thanks for answering,
Further detail:
The actual output is the rule is fired (ie, the param is not found) and then the param is
printed out. So, in fact, the param does exists.
The Task is created as usual, nothing special here (insert (new Task...)
Code fragment from Task.java:
public String getParameter(String name){
for (Parameter param : getTechnicalParams()) {
if( name.equals(param.getName()) ) {
return param.getValue();
}
}
return null;
}
@XmlElement(name="parameter",nillable = true)
@XmlElementWrapper(name="technicalParams")
protected List<Parameter> technicalParams;
public List<Parameter> getTechnicalParams() {
if (technicalParams == null) {
technicalParams = new ArrayList<Parameter>();
}
return this.technicalParams;
}
It is important to note that in other flows of similar rules this is working perfect... I
know I have not giving so much input but I do not know what else could provide.
Any clues ?
-----Mensaje original-----
De: rules-users-bounces(a)lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] En
nombre de Wolfgang Laun
Enviado el: dilluns, 9 / novembre / 2009 13:56
Para: Rules Users List
Asunto: Re: [rules-users] Inconsistent behavior between LHS and RHS ...
It's difficult to assess this case without the code from Task.java,
especially mehtods getParameter(), getTechnicalParams(); the code used
to create the Task fact, and the actual output.
-W
2009/11/9 Javier Vera Gomez <Javier.Vera(a)andorratelecom.ad>:
Hi,
I've been using drools 4.07 for a while. I have found a weird case. It seems
that when evaluating the LHS some fact is true but the RHS probes it wasn't
actually true.
The example code is at the end. It is very weird to me I have no clue about
how to solve this or what could be happening!
rule "A-Rule"
no-loop true
ruleflow-group "validate-task"
salience -9999999
when
>$task : Task( type == "Creacio_Profile_Radius" )
>eval($task.getParameter("PRIMARYDNS")==null)
then
>System.out.println(">>>DBGPar0:
"+$task.getTechnicalParams().get(0).getName());
>System.out.println(">>>DBGPar1:
"+$task.getTechnicalParams().get(1).getName());
>System.out.println("Getparam PRIMARYDNS:
"+$task.getParameter("PRIMARYDNS"));
end
further explanation:
The Task class has a List<Parameter> technicalParams, originally the eval
part was:
not(Parameter (name=="PRIMARYDNS") from $task.technicalParams())
it didn't work and I coded this "getParameter" method just to make some
tests. So, it seems the collection appears "empty" to the LHS but in fact it
isnt!
any clue?
thanks a lot,
Javier
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