[rules-users] Simple rule and Query

[DECOUX Yannick]

I'am using 5.2.0-SNAPSHOT using maven from https://repository.jboss.org/nexus/content/groups/public/ and i can't make it work...
The query still return a size of 0...

Can you share your entire project with me ?

Thanks


De : Wolfgang Laun [mailto:wolfgang.laun at gmail.com]
Envoyé : jeudi 14 avril 2011 09:34
À : Rules Users List
Objet : Re: [rules-users] Simple rule and Query

This seems to be fixed for 5.2.x.:

declare Num
  num : Integer
end

rule sort
when
    Integer( $i: intValue )
then
    insert( new Num( $i ) );
end

query numbers
    $a: Num( $b: num )
end


    QueryResults qRes = session.getQueryResults( "numbers" );
    System.out.println( "result count: " + qRes.size() );
    for( QueryResultsRow row: qRes ){
        Object obj = row.get( "$b" );
    System.out.println( "$b=" + obj.toString() );
    }

This produces the expected results.

Calling getQueryResults with a string not denoting an existing query returns an empty result set. I've updated the javadoc - thanks.

-W




2011/4/14 DECOUX Yannick <yannick.decoux at ucm.be<mailto:yannick.decoux at ucm.be>>
query numbers
    $a: Num( $b: num )
end
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 at ucm.be<mailto:yannick.decoux at ucm.be>]
Envoyé : mardi 5 avril 2011 07:52
À : rules-users at lists.jboss.org<mailto:rules-users at 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


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