[rules-users] Maps in Drools

[Mark Proctor]

André Thieme wrote:
> Edson Tirelli schrieb:
>   
>>    ooops... correct version:
>>
>> when
>>    Map( this["type"] == "Point", $x : this["x"] )
>>    Map( this["type"] == "Circle", this["x"] == $x )
>> then
>> end
>>     
>
>   
We default to MVEL, because it's simple and already contains everything 
we need for expression evaluation. However it would definitely be 
possible to implement this natively, effectively "emulating" MVEL - 
although you need to think what this actual buys? It doesn't buy 
indexing, as it's not MVEL that is the problem here.

Mark
> Okay, so in the mvel syntax this is possible.
> Can this also be achieved in the default rule syntax, without mvel?
>
> The mvel syntax needs to be interpreted at runtime, so my Clojure lib
> will have to output rules in Drools' native rule language.
>
> What interests me most is that first part:
> Map( this["type"] == "Point", $x : this["x"] )
>
>
> André
>   

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