[rules-users] Inserting new Object

[Wolfgang Laun]

This is not an issue of exception handling.

If you use "declare" you'll have to initialize all collection-typed fields
properly
before you can call any methods, e.g.

Set set = new HashSet<?>()
watcher.setValueSet( set );
set.add(...)

-W



2010/8/13 Tina Vießmann <tviessmann at stud.hs-bremen.de>

>  Hi Edson,
>
> I can't provide a test case. But I've figured out what the exception are
> about. It's not about the code I've posted before. It's about the exceptions
> that the java.util.Set.add() method throws. I've attached the concerned code
> at the end.
> That means for me I have to manage the exception handling. I've tried to
> google the topic. The best I came up with is a mailing list entry:
> http://drools-java-rules-engine.46999.n3.nabble.com/Exception-handling-policy-td113782.html
> Would that be the correct solution? If yes, how do I implement the handler?
> I would be thankful for a code example.
>
> The code that the exception references is:
>
> declare Watcher
>     @role ( event )
>
>     triggeringValue : Value
>     numberOfContainedValues : int
>     valueSet : Set  // Set<Value>
> end
>
> // ....
>
> function Watcher generateWatcherEvent(Value firstValue) {
>     Watcher watcher = new Watcher();
>     watcher.setNumberOfContainedValues(1);
>     watcher.setTriggeringValue(firstValue);
>
>     // add value to set
>     Set set = watcher.getValueSet();
>     set.add(firstValue);
>     watcher.setValueSet(set);
>
>     return watcher;
> }
>
>
> Thanks for your help! :)
>
> Tina
>
>
> Am 13.08.2010 01:14, schrieb Edson Tirelli:
>
>    Hi Tina,
>
>     Can you provide a test case?
>
>     Edson
>
> 2010/8/12 Tina Vießmann <tviessmann at stud.hs-bremen.de>
>
>> Hi again ...
>>
>> I would like to insert a new generated object into the knowledge base.
>> It seems that
>>     insert (new Watcher())
>>  is working. But
>>     Watcher watcher = new Watcher();
>>     insert (watcher);
>>  isn't working?
>>
>> Why?
>>
>> Thank you for any explanations. :)
>>
>> Tina
>> _______________________________________________
>> rules-users mailing list
>> rules-users at lists.jboss.org
>> https://lists.jboss.org/mailman/listinfo/rules-users
>>
>
>
>
> --
>   Edson Tirelli
>   JBoss Drools Core Development
>   JBoss by Red Hat @ www.jboss.com
>
>
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