[rules-users] Custom operator

[Bruno Freudensprung]

Hello,

It seems that the logic behind the "operator" drop-down list comes from 
the 
"org.drools.ide.common.client.modeldriven.SuggestionCompletionEngine" 
and "org.drools.eclipse.rulebuilder.modeldriven.HumanReadable" classes. 
That's for the "rule authoring" perspective.
I've also seen that the business rule editor involves the DrlParser 
class. So, in a "rule parsing" perspective, I guess I need to find a way 
to register my custom operator into the EvaluatorRegistry used by the 
Eclipse plugin (and I don't know where this can be done).

Do you think I am on the right track? Is there a risk that code 
modifications will involve so many classes that, in the end, adding a 
custom operator to the business rule editor will be a difficult task for 
someone very new to Drools (like me)?

Thanks in advance,
Best regards,

Bruno.

Bruno Freudensprung a écrit :
> Hello,
>
> I'd like to implement a custom "lucenematches" operator that would 
> enable writing conditions like:
> $d : Doc(text lucenematches "(foo AND bar) OR roam~0.8")
>
> As I've taken a look at the following post on athico 
> (http://blog.athico.com/2009/05/imperfect-evaluations.html), and seen 
> that the appendix B of the "Drools JBoss Rules 5.0 Developer's Guide" 
> book that deals with custom operators, I am rather confident that I will 
> find my way in implementing my operator (if not, I'll post here again :-)).
>
> However, I wonder if it will be possible to add my "lucenematches" 
> operator to the "operator" drop-down list of the Eclipse's Business Rule 
> Editor.
> Does anyone have an idea?
>
> Best regards,
>
> Bruno.
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