[rules-users] Maps in Drools

[André Thieme]

Edson Tirelli schrieb:

>         when
>                Customer( $custId : id )
>                DailyOrders( count[$custId] == 1 )
>         then

Btw, this brings me to a new syntax question for the default Drools rule
syntax. Is this possible:

when
   m:Map()
   eval( m.get("type") == "Point", $x : m.get("x") )
   ...
   Circle( x == $x )
then
   ...


or, an alternative which may be clearer:

when
   m:Map()
   eval( m.get("type") == "Point" )
   $x : m.get("x")
   ...
then
   ...

So, what I would like to have is:
1) looking at all Maps which have the value "Point" under the key "type"
2) of all those Maps: store in a var what value they have under key "x"
3) reuse the var, here $x instead of having an expensive lookup over and
    over again.

Is that possible? Or would I have to write my example above as
...
c:Circle()
eval(c.getX() == m.get("x"))


André
-- 
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