[rules-users] memberOf mvel list

[deaddowney]

I'm using a map because this is a legacy class that is quite dynamic and can
contain arbitrary tag/values.  Ideally, if I knew all the attributes I would
declare them as fields, but I'm stuck with this map at the moment. 
Regardless, using your explanation, why does

when
                               $person : Person(
                                   props[“AGE”] > 20,
                                   (props[“NAME”] =="Fred" || props["NAME"]
== "Barney || props["NAME"] == "Wilma"])
)

work?


Corneil du Plessis-2 wrote:
> 
> You are expecting map values to be elevated somehow from Object to Integer
> and String.
> By using typed attributes in the Person class you can overcome your
> problem.
> 
> Sent from my HTC (Android)
> 
> On Feb 21, 2010 9:28 PM, "Adam Krieg" <spamcontrol at mac.com> wrote:
> 
> I’m new to Drools and having trouble accessing my Domain object which is
> basically a container around a map.
> 
> class Person {
>    Map props;
>    public Map getProps();
> …. Extra stuff
> }
> 
> 
> I want to create a rule that will match when Age is greater than 20 and
> name
> is one of “Fred”, “Barney”, or “Wilma”.  These  entries are stored in the
> Map props, so that to get age, you would call person.getProps().get(“AGE”)
> 
> 
> 
> rule "My Rule"
>                dialect "mvel"
>                when
>                                $person : Person(
>                                    props[“AGE”] > 20,
>                                    props[“NAME”] memberOf [“Fred”,
> “Wilma”,
> “Barney”]
>                                )
>                then
>                                System.out.println("found match”+$person);
> 
> End
> 
> But I am running into a parsing error:
> no viable alternative at input ')' in rule "My Rule" in pattern Person.
> 
> The second condition seems to be the problem.  Can I check for membership
> inside a List I create inline in mvel?
> 
> 
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> 
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> 
> 
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