[rules-users] Getting the return from a funcion

[Leandro Carvalho]

Thank you so much for the help.

I end up doing something similiar with what Shawn Garner suggested with the
Scruber.

Thanks again.


2009/9/10 Wolfgang Laun <wolfgang.laun at gmail.com>

> You cannot bind a variable to a function result, as in "$word :
> hasForbiddenWordsSet( ... )".
>
> I'd use the original boolean function hasForbiddenWordsSet (which might
> even include the check against getTitle() returning null), and add another
> function, returning the string, to be called after 'then'.
>
> The first one could be implemented by calling the second one, and comparing
> the result to null. Since you probably expect that there aren't too many
> "forbidden" words in titles, the performance hit of calling the second one
> twice for each firing should be tolerable.
>
> -W
>
>
> 2009/9/9 Leandro Carvalho <leandrodcarvalho at gmail.com>
>
>> Hi! I'm new here and a have a doubt about rules and functions in Drools.
>>
>> I have this rule:
>>
>> rule "ProductDescription validation"
>>     when
>>         $listing : Listing( $description:productDescription != null )
>>         eval( $description.getTitle() != null )
>>         eval( hasForbiddenWordsSet( wordsSet, $description.getTitle() ) )
>>     then
>>         System.out.println("ERROR!");
>> end
>>
>> And this function:
>>
>> function boolean hasForbiddenWordsSet(Set wordsSet, String value) {
>> #do something useful here
>> }
>>
>>
>> And everything works fine. But now I want that function
>> "hasForbiddenWordsSet" return a String. For example to print at "then".
>> I tried something like this:
>>
>> rule "ProductDescription validation"
>>     when
>>         $listing : Listing( $description:productDescription != null )
>>         eval( $description.getTitle() != null )
>>         $word : hasForbiddenWordsSet( wordsSet, $description.getTitle() )
>>     then
>>         System.out.println("ERROR: " + word);
>> end
>>
>> function String hasForbiddenWordsSet(Set wordsSet, String value) {
>> #do something useful here
>> }
>>
>> But it doesn't work, tried some other things and still no success.
>>
>> Could someone help me?
>>
>> Thanks in advance.
>>
>> --
>> Leandro Carvalho
>>
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>> rules-users at lists.jboss.org
>> https://lists.jboss.org/mailman/listinfo/rules-users
>>
>>
>
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-- 
Leandro Carvalho
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