[jboss-jira] [JBoss JIRA] Updated: (JBRULES-1001) NullPointerException when a function is used inside a predicate value constraint

[Edgardo Carena (JIRA)]

     [ http://jira.jboss.com/jira/browse/JBRULES-1001?page=all ]

Edgardo Carena updated JBRULES-1001:
------------------------------------

        Summary: NullPointerException when a function is used inside a predicate value constraint  (was: NullPointerException when a function is used inside a predicate expression )
    Description: 
if you change the FibonacciExample like this:

(...)

import java.lang.Math;

function boolean approxEqual(double val1, double val2) {
    return (Math.abs(val1-val2)<0.01);
}

(....)

rule Calculate
        when
                f1 : Fibonacci( s1 : sequence, value != -1 )
                f2 : Fibonacci( s2 : sequence -> (approxEqual(sequence,(s1 + 1))), value != -1 )
                f3 : Fibonacci( sequence == (s2 + 1 ), value == -1 )
        then
                f3.setValue( f1.getValue() + f2.getValue() );
                update( f3 );
                retract( f1 );
                System.out.println( f3.getSequence() + " == " + f3.getValue() );
end

thus introducing a function inside a predicate value constraint, the example works well, however a NullPointerException is printed out during the call of the addPackageFromDrl method.

I tried in many examples, also calling directly the java.lang.Math.abs function, and the message is always printed with no apparent side effect.

  was:
if you change the FibonacciExample like this:

(...)

import java.lang.Math;

function boolean approxEqual(double val1, double val2) {
    return (Math.abs(val1-val2)<0.01);
}

(....)

rule Calculate
        when
                f1 : Fibonacci( s1 : sequence, value != -1 )
                f2 : Fibonacci( s2 : sequence -> (approxEqual(sequence,(s1 + 1))), value != -1 )
                f3 : Fibonacci( sequence == (s2 + 1 ), value == -1 )
        then
                f3.setValue( f1.getValue() + f2.getValue() );
                update( f3 );
                retract( f1 );
                System.out.println( f3.getSequence() + " == " + f3.getValue() );
end

thus introducing a function inside a predicate expression, the example works well, however a NullPointerException is printed out during the call of the addPackageFromDrl method.

I tried in many examples, also calling directly the java.lang.Math.abs function, and the message is always printed with no apparent side effect.


> NullPointerException when a function is used inside a predicate value constraint
> --------------------------------------------------------------------------------
>
>                 Key: JBRULES-1001
>                 URL: http://jira.jboss.com/jira/browse/JBRULES-1001
>             Project: JBoss Rules
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>    Affects Versions:  4.0.0.MR3
>            Reporter: Edgardo Carena
>         Assigned To: Mark Proctor
>            Priority: Minor
>
> if you change the FibonacciExample like this:
> (...)
> import java.lang.Math;
> function boolean approxEqual(double val1, double val2) {
>     return (Math.abs(val1-val2)<0.01);
> }
> (....)
> rule Calculate
>         when
>                 f1 : Fibonacci( s1 : sequence, value != -1 )
>                 f2 : Fibonacci( s2 : sequence -> (approxEqual(sequence,(s1 + 1))), value != -1 )
>                 f3 : Fibonacci( sequence == (s2 + 1 ), value == -1 )
>         then
>                 f3.setValue( f1.getValue() + f2.getValue() );
>                 update( f3 );
>                 retract( f1 );
>                 System.out.println( f3.getSequence() + " == " + f3.getValue() );
> end
> thus introducing a function inside a predicate value constraint, the example works well, however a NullPointerException is printed out during the call of the addPackageFromDrl method.
> I tried in many examples, also calling directly the java.lang.Math.abs function, and the message is always printed with no apparent side effect.

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