I have encountered the following problem using enums in drools.

I have an enum defined called ETimeConstraint, something of the sort:

public enum ETimeConstraint {

NO_CONSTRAINT,

TODAY,

TOMORROW,

;

}

Now I wish to filter sentences which reside in the working memory based on a time constraint which is of this enum type.

I created the following test rule

rule "My Test"

when

            $sentences:       ArrayList()

from collect (IPhoneSentences.Sentence(

                                                                        descriptor contains ETimeConstraint

                                                                           ))

then

            //something

end

this does not work meaning no sentence are selected although I know that there are sentences in the working memory.

but when I add ETimeConstraint.name it does:

rule "My Test"

when

            $sentences:       ArrayList()

from collect (IPhoneSentences.Sentence(

                                                                        descriptor contains ETimeConstraint.name  

                                                                           ))

then

            //something

end

I can stick to this workaround but it becomes very problematic to work this way. Furthermore once I wish to define a variable for example defining $timeConstraint :

rule "My Test"

when

                  $cm:              Condition(

$timeConstraint: contextIntention,                                                       

                                    )

$sentences:       ArrayList()

from collect (IPhoneSentences.Sentence(

                                                                        descriptor contains $timeConstraint

                                                                           ))

then

            //something

end

this will not work because I can’t put $timeConstraint.name

any suggestions?

I am running:

- Drools 5.2.0

- Eclipse Helios

- JBoss 5.1.0

Thanks

Hezi