[jboss-jira] [JBoss JIRA] (DROOLS-1618) DMN sort function doesn't work on IBM JDK

[Tibor Zimányi (JIRA)]

Tibor Zimányi created DROOLS-1618:
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             Summary: DMN sort function doesn't work on IBM JDK
                 Key: DROOLS-1618
                 URL: https://issues.jboss.org/browse/DROOLS-1618
             Project: Drools
          Issue Type: Bug
          Components: dmn engine
    Affects Versions: 7.0.0.Final
            Reporter: Tibor Zimányi
            Assignee: Edson Tirelli
             Fix For: 7.1.0.Final


When running DMN test combination _sort( list : [3, 1, 4, 5, 2] )_ from FEELFunctionsTest class on IBM JDK, the test fails, because the correct sort method cannot be invoked. 

On IBM JDK, the combination tries to invoke method [1] from SortFunction class, which is incorrect, because the second method with just one parameter should be invoked. This behaviour is influenced by IBM JDK returning methods from call [2] in different order. 

Notes from debugging: 
This check [3] pass because the array there is 3 items long although the last item is not populated. This array is created from this method call [4].

[1] https://github.com/kiegroup/drools/blob/master/kie-dmn/kie-dmn-feel/src/main/java/org/kie/dmn/feel/runtime/functions/SortFunction.java#L36
[2] https://github.com/kiegroup/drools/blob/ec038e19867d0f4f13f9ddc508f3bbab411d3415/kie-dmn/kie-dmn-feel/src/main/java/org/kie/dmn/feel/runtime/functions/BaseFEELFunction.java#L192
[3]https://github.com/kiegroup/drools/blob/ec038e19867d0f4f13f9ddc508f3bbab411d3415/kie-dmn/kie-dmn-feel/src/main/java/org/kie/dmn/feel/runtime/functions/BaseFEELFunction.java#L246
[4] https://github.com/kiegroup/drools/blob/ec038e19867d0f4f13f9ddc508f3bbab411d3415/kie-dmn/kie-dmn-feel/src/main/java/org/kie/dmn/feel/runtime/functions/BaseFEELFunction.java#L235



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