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(a)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@ucm.be]
*Envoyé :* mardi 5 avril 2011 07:52
*À :* rules-users(a)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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