[rules-users] Unable to perform simple primitive operations

[Mark Proctor]

I believe all your requests are in 4.0, give that a try. For 2.0.6 
you'll have to unwrap
 > (bpl.doubleValue() * 1.5 )

Mark
Natraj Gudla wrote:
> Hi All,
>  
> I am using Drools 3.0.6 and unable to perform some simple form of 
> multiplication. I want to compare an object field with another field 
> multiplied by a factor.
>  
> *
>
> rule
>
> * "*Calculate* Business profit,1"
> *when
>
> **EMIAgainstProperty* ( bp1 : businessProfit1 )
> emi : *EMIAgainstProperty* ( businessProfit2 > *(bp1*1.5)* ) *then
> *emi.setBusinessProfit((emi.getBusinessProfit1()+emi.getBusinessProfit2())/2);*
> **end*
>
> I get an error on creation of the package that * is undefined for 
> Double and double. I understand this is because Drools does an auto 
> box on primitive type variables. But is there a work around to do 
> simpler comparisons like this, especially on the right hand side of 
> the condition. some thing like [ variable * constantValue ].
>
> Also, i am forced to do a declaration for businessProfit1, and use in 
> the comparison below. I am not able to compare two fields of the same 
> object directly.
>
> some thing like businessProfit2 > businessProfit1 does not work, why 
> is this so? Any one has faced these problems earlier?
>
> Thanks
> Natraj
>
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