[jboss-jira] [JBoss JIRA] (DROOLS-1507) Error message "unable to invole method" should mention DRL line

[Geoffrey De Smet (JIRA)]

Geoffrey De Smet created DROOLS-1507:
----------------------------------------

             Summary: Error message "unable to invole method" should mention DRL line
                 Key: DROOLS-1507
                 URL: https://issues.jboss.org/browse/DROOLS-1507
             Project: Drools
          Issue Type: Bug
          Components: core engine
            Reporter: Geoffrey De Smet
            Assignee: Mario Fusco


In a complex DRL file we wrote something like this:

{code}
when
    Visit(foo != null, $w : foo.weekOfYear)
    not Visit(foo.weekOfYear < $w)
then
    ...
end
{code}

throws this exception:

{code}
java.lang.RuntimeException: cannot invoke getter: getFoo ...
    at org.mvel2.optimizers.impl.refl.nodes.GetterAccessor.getValue(GetterAccessor.java:74)
 ...
Caused by: java.lang.RuntimeException: unable to invoke method: ....foo.getWeekOfYear: target of method is null
    at org.mvel2.optimizers.impl.refl.nodes.GetterAccessor.getValue(GetterAccessor.java:66)
    at org.mvel2.optimizers.impl.refl.nodes.GetterAccessor.getValue(GetterAccessor.java:40)
...
Caused by: java.lang.NullPointerException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at org.mvel2.optimizers.impl.refl.nodes.GetterAccessor.getValue(GetterAccessor.java:43)
{code}

with no DRL line.



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