[rules-users] drools with IKVM

Piyush Goel piyush.goel at dealhunt.in
Sun Nov 21 01:48:52 EST 2010


We are using Drools engine on our client written in C#. We are using IKVM to
convert the drools jar and our java beans into dll's using IKVM. We have a
rule similar to this:-

rule "aggregate rule"
    when
        $b : Bill(billAmount > 100)
        $n : Number(doubleValue > 100) from accumulate ( $l : LineItem()
from $b.findItems("color", "blue"), sum($l.getSellingValue()))
    then
        VoucherSeries fact0 = new VoucherSeries();
        fact0.setSeriesCode( "aggregate voucher" );
        insert(fact0 );
        voucherlist.add(fact0);
        System.out.println("sum" + $n);
end


This rule works fine when it is run with java based drools API's, but while
running it with IKVM converted drools, it throws the following error:-

Unable to cast object of type 'AccumulateMemory' to type 'FromMemory'.

Any ideas on what might be going wrong ?

thanks,
piyush
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