[rules-users] Guvnor and drools implementation - questions
Vincent Legendre
vincent.legendre at eurodecision.com
Thu Mar 3 04:34:02 EST 2011
I don't think that enums needs to be linked to a Pojo attribute. To me
it is just an identifier used in ENUM DSL constraints. The 'properties'
is not an attribute of a Map. I think you could set it to whatever you
like (something more linked to your problem).
For making that dynamic, it is explained in the guvnor doc
<http://drools.herod.net/drools-guvnor/html_single/index.html> (chapter
"1.4.2.4.8. Data enumerations (drop down list configurations)" )
'Person.age' : (new com.yourco.DataHelper()).getListOfAges()
But I never tried that.
Le 02/03/2011 14:06, ioda100 a écrit :
> Really thank you, it's working fine. I will see if it's working for my
> more difficult case.
>
>
> On Tue, Mar 1, 2011 at 11:28 PM, Esteban [via Drools - Java Rules
> Engine] <[hidden email]
> </user/SendEmail.jtp?type=node&node=2613230&i=0&by-user=t>> wrote:
>
> You need to create the DSL first.
> Follow these steps:
> 1.- Add java.util.Map to package imports (I think you already did
> this)
> 2.- Create a new Enumeration with the following content:
> *'Map.properties': ['prop1', 'prop2', 'prop3']*
> 3.- Create a new DSL with this content:
> *[when]The property {key:ENUM:Map.properties} of the map is
> {value}=Map((this["{key}"] == "{value}"))*
> 4.- Create a new Rule and add the DSL sentence to the WHEN part.
> You should see the drop down.
>
> Note the name of the enumeration and how the variable {key} is
> defined in the DSL. I think you can also read the enumerations
> from a Java Enum present on your model, but I'm not sure about it.
> Does anyone know about this?
>
> Best Regards,
>
> XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
>
> Esteban Aliverti
> - Developer @ http://www.plugtree.com <http://www.plugtree.com>
> - Blog @ http://ilesteban.wordpress.com
>
>
> 2011/3/1 ioda100 <[hidden email]
> <http://user/SendEmail.jtp?type=node&node=2607065&i=0>>
>
> Yes but for this i will be obliged to create a POJO of an
> object. And for attributes of that object in DSL i can define
> values that can take this attribute?
>
> Maybe i don't understand but i don't see how to do with this.
>
> My case :
> I have Maps in the session. Each Map has for example 5
> properties ("prop1", "prop2", "prop3", "prop4", "prop51") and
> the value is a string. The Map is Map<String, Object> but
> generally Object is a String.
> So in the When clause i have something like that :
> $m : Map((this["prop1"] == "test1"))
> I have included java.utils.Map in Guvnor. So when i add a when
> clause i can choose Map in the list but impossible to have
> "prop1" to "prop5" in a drop down list for attributes of the Map.
> Would it be possible to create a Pojo for Map or would it be
> in conflict with the Map of Java?
>
> Thank you for your time
>
>
> Le 1/03/2011 17:55, Vincent Legendre [via Drools - Java Rules
> Engine] a écrit :
>> Le 01/03/2011 15:39, ioda100 a écrit :
>>> Thanks for your quick answer Esteban.
>>>
>>> 1) Ok i will have a look at DSL. In fact in my map i know
>>> all the properties (about 200). It would be cool to be able
>>> to have a drop down list with all these attributes as when
>>> we do it with objects for which we gave Pojo to Guvnor.
>> You can define enumerations for a particular attribute.
>> Inside a DSL you can constrain a placeholder with that
>> enumeration.
>> And finally, enums can be static, or dynamic (a interface to
>> implement that returns a list of values).
>>
>> search the Guvnor's doc in these chapters
>>
>>
>> 1.4.2.4.8. Data enumerations (drop down list
>> configurations)
>>
>>
>>
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