[rules-users] Guvnor and drools implementation - questions

[Esteban Aliverti]

Even more; if you don't want to rule's authors to see the real key value of
the map in the drop down, you can use aliases in the enumeration definition:
*'Map.properties': ['prop1=Property 1', 'prop2=Property 2', 'prop3=Property
3']

*Best Regards,*

*XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Esteban Aliverti
- Developer @ http://www.plugtree.com
- Blog @ http://ilesteban.wordpress.com


On Tue, Mar 1, 2011 at 7:24 PM, Esteban Aliverti <esteban.aliverti at gmail.com
> 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
> - Blog @ http://ilesteban.wordpress.com
>
>
> 2011/3/1 ioda100 <eddyhautot at gmail.com>
>
>> 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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