When a static method with the same signature is declared by a class and its superclass Drools mistakenly invokes the one of the superclass even when it shouldn't.

The original jira ticket reports this problem as a bug of the constraint jitting process. However I find a simpler use case (that I am pasting below) showing that in some cases this problem is present also before the constraints jitter kicks in.


    public static class ARef {
        public static int getSize(String s) {
            return 0;
        }
    }

    public static class BRef extends ARef {
        public static int getSize(String s) {
            return s.length();
        }
    }

    @Test
    public void testJittingConstraintInvokingStaticMethod() throws Exception {
        // DROOLS-410
        String str =
                "dialect \"mvel\"\n" +
                "import org.drools.compiler.integrationtests.Misc2Test.ARef\n" +
                "import org.drools.compiler.integrationtests.Misc2Test.BRef\n" +
                "\n" +
                "global java.util.List list;\n" +
                "\n" +
                "rule R when\n" +
                "    $s : String( length == BRef.getSize(this) )\n" +
                "then\n" +
                "    list.add($s);\n" +
                "end\n";

        KnowledgeBase kbase = loadKnowledgeBaseFromString(str);
        StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();

        List<String> list = new ArrayList<String>();
        ksession.setGlobal("list", list);

        ksession.insert("1234");
        ksession.fireAllRules();

        assertEquals(1, list.size());
    }