[rules-users] NullPointerException when updating a fact

[Stephen Masters]

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 at 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 at 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 at 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-fact-tp4025181p4025204.html
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> 
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