[rules-users] Using memberOf in Decision Tables

[Mike Love]

Hi,

I have the following rules that I am trying to implement in a decision table

rule "Payment greater 5m"
    agenda-group "txnPricing"   
    salience 5
    when
        payment : Collection() from bc.getPaymentTransactionTypes()
        t : Transaction(customer == c,
                        transactionType memberOf payment,
                        transactionAmount >= 5000000)
    then
        t.setBaseFee(36.00);
        t.setFeeDiscount(0.00);
end

rule "Payment less 5m"
    agenda-group "txnPricing"   
    salience 5
    when
        payment : Collection() from bc.getPaymentTransactionTypes()
        t : Transaction(customer == c,
                        transactionType memberOf payment,
                        transactionAmount < 5000000)
    then
        t.setBaseFee(60.00);
        t.setFeeDiscount(0.00);
end

I have attached the Decision Table for reference. Basically, I have two 
condition columns representing the 2 conditions respectively. When the 
xls is processed the generated DSL has the two statements reversed as 
indicated below, and hence the exceptions.

package za.co.fnb.billing;
#generated from Decision Table
import java.util.Collection;
import za.co.fnb.billing.Customer;
import za.co.fnb.billing.Transaction;
import za.co.fnb.billing.BillingConstraints;
global Customer c;
global BillingConstraints bc;
#From row number: 12
rule "Payments_12"
   
    when
        t: Transaction(customer == c, t.transactionAmount >= 0, 
t.transactionAmount <5000000, transactionType memberOf $payments)
        $payment : Collection() from 
bc.getTransactionTypesForGroup("Payments")
    then
        t.setBaseFee(60.00);
        t.setFeeDiscount(0.00);
end

#From row number: 13
rule "Payments_13"
   
    when
        t: Transaction(customer == c, t.transactionAmount >= 5000000, 
t.transactionAmount <9999999999, transactionType memberOf $payments)
        $payment : Collection() from 
bc.getTransactionTypesForGroup("Payments")
    then
        t.setBaseFee(36.00);
        t.setFeeDiscount(0.00);
end


org.drools.rule.InvalidRulePackage: Unable to return Declaration for 
identifier '$payments' : [Rule name=Payments_12, agendaGroup=MAIN, 
salience=0, no-loop=false]
Unable to create restriction '[VariableRestriction: memberOf $payments 
]' for field 'transactionType' in the rule 'Payments_12' : [Rule 
name=Payments_12, agendaGroup=MAIN, salience=0, no-loop=false]
Unable to return Declaration for identifier '$payments' : [Rule 
name=Payments_13, agendaGroup=MAIN, salience=0, no-loop=false]
Unable to create restriction '[VariableRestriction: memberOf $payments 
]' for field 'transactionType' in the rule 'Payments_13' : [Rule 
name=Payments_13, agendaGroup=MAIN, salience=0, no-loop=false]

    at org.drools.rule.Package.checkValidity(Package.java:424)
    at 
org.drools.common.AbstractRuleBase.addPackage(AbstractRuleBase.java:384)
    at 
za.co.fnb.billing.TxnVolDecisionTableTest.readDecisionTable(TxnVolDecisionTableTest.java:164)
    at 
za.co.fnb.billing.TxnVolDecisionTableTest.executeExample(TxnVolDecisionTableTest.java:62)
    at 
za.co.fnb.billing.TxnVolDecisionTableTest.main(TxnVolDecisionTableTest.java:33)


Thanks,
Mike


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