[rules-users] Getting Latest Matching Fact

[Wolfgang Laun]

You'll have to  separate the logic for determining that the item you
are looking for is in the list from the access to the first occurrence.

rule "find first 'car'"
when
    $p1:Policy()
    $carList: List( size > 0 )
        from collect ( Vehicle( name ==  "car" )
            from $p1.vehicleslist )
    $first: Vehicle( ) from $carList.get( 0 )
then
    System.out.println( $first );
end




-W

On 24/08/2012, salt <writemesaltworth at gmail.com> wrote:
> Hi Laune,
>
> Vehicles list contains the values name and qty and the values are
>
> car,10
> jeep,20
> lorry,30
> car,30
>
> Below is my implementation for that scenario which i have asked.
>
> rule "HelloWorld_13"
> 	salience 65523
> 	when
> 	$p1:Policy()
> 	$trandet:Vehicle(name in ("CAR")) from $p1.vehicleslist
> 	then
> 	System.out.println($trandet.getQty());
> end
>
> The result for the above rule is
>
> 30
> 10
>
> but i need 10 alone which is at the top of that list.. is that possible.?
>
> and when googling found that if we use salience along with 'from' its
> possible..
>
> Please share your thoughts on the above.
>
> Thanks
> Salt
>
>
>
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