[rules-users] Problem with Banking Tutorial

[Stefan Schuster]

Hello,

I have a problem with the banking tutorial number 3, which is part of the
examples of drools expert.
It simply adds some Numbers as facts, and retracts them in an increasing
order.

It is very short, therefore I post the whole Code:


BankingExample3.java
_________________________________________________
package org.drools.tutorials.banking;

public class BankingExample3 {
    public static void main(String[] args) {
        Number[] numbers = new Number[] {wrap(3), wrap(1), wrap(4),
wrap(1), wrap(5)};
        new RuleRunner().runRules( new String[] { "Example3.drl" },
                                   numbers );
    }

    private static Integer wrap(int i) {
        return new Integer(i);
    }
}
_________________________________________________



Example3.drl:
_________________________________________________
package org.drools.tutorials.banking

rule "Rule 01"
    when
        $number : Number()
        not Number( intValue < $number.intValue )
    then
        System.out.println("Number found with value: " + $number.intValue()
);
        retract( $number );
end
_________________________________________________


Output:
_________________________________________________
Loading file: Example3.drl
Inserting fact: 3
Inserting fact: 1
Inserting fact: 4
Inserting fact: 1
Inserting fact: 5
Number found with value: 1
Number found with value: 1
Number found with value: 3
Number found with value: 4
Number found with value: 5
_________________________________________________


that seams absolute logically to me.
But now I alter the Numbers in the Java-Part:
 Number[] numbers = new Number[] {wrap(3), wrap(1), wrap(2)};

and the output destroys everything I thought I understood:
Loading file: Example3.drl
Inserting fact: 3
Inserting fact: 1
Inserting fact: 2
Number found with value: 1
Number found with value: 3
Number found with value: 2


Can someone  reproduce this behavior?? It seams absolutely strange to me. I
would have expected the order 1,2,3. Any explanations?

Thanks in advance for helping me!
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