Re: [rules-users] NullPointerException when updating a fact
This is a regression that happened on the way from 5.3.0 to 5.4.0.
Apparently it is the extension of the generic class
public class FirstName extends Value<String> { }
that causes the NPE (in 5.5.0) and an unsupported operation exception
in 5.4.0. 5.2.0 and 5.3.0 handle this correctly, 5.1.1 seems to have a
restriction (can't regex-match an Object) but at least it doesn't
crash.
There is indeed a sad decline in quality on the path leading to 5.5.0...
-W
On 30/07/2013, Stephen Masters <stephen.masters(a)me.com> wrote:
If you wish to see it working, you can grab my maven test harness
with your
code in here:
git clone -b 2013-07-30-validate-first-name
git@github.com:gratiartis/scattercode-drools-scenarios.git
Just run the test in src/test/java/demos/validate/ValidateTest.java
However, I now know why yours is failing. The project above uses Drools
5.4.0. I'm guessing that you're using 5.5.0.Final, because if I switch
version in my pom.xml, then I get a NullPointerException. I suspect that you
have hit upon one of the many bugs in 5.5.0.Final.
Steve
On 30 Jul 2013, at 09:50, Stephen Masters <stephen.masters(a)me.com> wrote:
> The fact that all of your classes were static was ringing alarm bells, so
> I tested it without that.
>
> It works perfectly well if you remove 'static' from everything.
>
> Steve
>
>
> On 30 Jul 2013, at 08:43, schenka7 <eugen.berenstein(a)gmail.com> wrote:
>
>> I have appended the code that leads to the exception.
>>
>> I have also noticed that the exception doesn't arise when using the
>> concrete
>> FirstName type in the retracting rule. I have been using the generic
>> base
>> class Value because I didn't want to write the same rule for all types
>> extending from it.
>>
>> Main.java <http://drools.46999.n3.nabble.com/file/n4025204/Main.java>
>> validation.drl
>> <http://drools.46999.n3.nabble.com/file/n4025204/validation.drl>
>>
>>
>>
>> --
>> View this message in context:
>>
http://drools.46999.n3.nabble.com/NullPointerException-when-updating-a-fa...
>> Sent from the Drools: User forum mailing list archive at Nabble.com.
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>> https://lists.jboss.org/mailman/listinfo/rules-users
>
>
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