Hi everyone,

I’am still stuck with this simple example, anyone can tell me where to look or what I’m missing ?

Thanks

Yannick

De : DECOUX Yannick [mailto:yannick.decoux@ucm.be]
Envoyé : mardi 5 avril 2011 07:52
À : rules-users@lists.jboss.org
Objet : [rules-users] Simple rule and Query

Hi,

I’am trying to use Query and i’am facing a little problem :

Given this simple rule :

package be.test.person

import be.test.person.*

query "get adult"

      adult : Adult( )

end

query "get person"

      person : Person( )

end

declare Adult

      name : String

end

rule "A person over 18 is an adult"

when

            Person( age >= 18)

then

            System.out.println("Adult detected");

insert(new Adult());        

end

Lets suppose one Person over 18 is inserted inside the working memory, the result of the query « get adult » is 0 (Please note the declaration of Adult type inside the rule)

If I create a Java class Adult (commenting the one in the .drl file) and then run the query again, this time the result is 1

Also, the signature of org.drools.runtime.rule.WorkingMemory.getQueryResults(String) says IllegalArgumentException when query is not found in the KnowledgeBase. This doesn’t seems to be the case when I use a fake query name.

I’am using drools 5.1.1

Any idea on this ?

Thanks