5:53 p.m.
When I define a rule:
When
cntct:Contact (initialized==true)
exr:Relation( contact==cntct,
active:active==$1,
relationName=="Old")
Then
contact.getStatus().setStatus(true);
contact.getStatus().addToReasonTrace(drools.getRule().getName());
end
..The bove works.
BUT, when I do the following:
When
cntct:Contact (initialized==true)
exr:Relation( contact==cntct,
active:active==$1,
relationName=="Old")
|| Relation( contact==cntct,
active:active==$1,
relationName==null)
Then
contact.getStatus().setStatus(true);
contact.getStatus().addToReasonTrace(drools.getRule().getName());
end
... The script compiles anda stateless Session is created successfully, but at
runtime/execution it fails with the exception:
java.lang.ClassCastException: com.arjun.brms.businessObjects.Contact
org.drools.rule.EvalCondition.isAllowed(EvalCondition.java:75)
org.drools.reteoo.EvalConditionNode.assertTuple(EvalConditionNode.java:141)
org.drools.reteoo.SingleTupleSinkAdapter.propagateAssertTuple
(SingleTupleSinkAdapter.java:20)
org.drools.reteoo.JoinNode.assertTuple(JoinNode.java:120)
org.drools.reteoo.SingleTupleSinkAdapter.propagateAssertTuple
(SingleTupleSinkAdapter.java:20)
org.drools.reteoo.JoinNode.assertObject(JoinNode.java:162)
org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject
(CompositeObjectSinkAdapter.java:317)
org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:130)
org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject
(CompositeObjectSinkAdapter.java:308)
org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:130)
org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject
(CompositeObjectSinkAdapter.java:308)
org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:168)
org.drools.reteoo.Rete.assertObject(Rete.java:168)
org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:190)
org.drools.reteoo.ReteooWorkingMemory.doInsert(ReteooWorkingMemory.java:70)
org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:848)
org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:822)
org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:623)
Class diagram:
~~~~~~~~~~~~~~~~
Contact<-- bi-directional association -->List<Relation>
Please advise! is this a bug?
thanks,
Arjun
6:24 p.m.
Arjun
It is a bug since a more friendly message should be raised at compile
time stating that your "contact" declaration is not available in one of your
logical branches.
Having said that, what you want to do is make your OR take priority over
the implicit AND and as such, you need to add () around the OR:
When
contact:Contact (initialized==true)
exr: ( Relation( contact==cntct,
active:active==$1,
relationName=="Old")
or Relation( contact==cntct,
active:active==$1,
relationName==null) )
Then
contact.getStatus().setStatus(true);
contact.getStatus().addToReasonTrace(drools.getRule().getName());
end
Having said that, better yet for you would not to use the OR CE, but to
use restriction connectives. This would be the most efficient (and clean)
way of writing your rule:
When
contact:Contact (initialized==true)
exr: Relation( contact==cntct,
active:active==$1,
relationName =="Old" || == null )
Then
contact.getStatus().setStatus(true);
contact.getStatus().addToReasonTrace(drools.getRule().getName());
end
As a syntax sugar, you could also write:
exr: Relation( contact==cntct,
active:active==$1,
relationName in ( "Old", null ) )
Can you please open a JIRA with your test case for the bug?
Thank you,
Edson
2007/7/30, Arjun Dhar <dhar_ar(a)yahoo.com>:
When I define a rule:
When
cntct:Contact (initialized==true)
exr:Relation( contact==cntct,
active:active==$1,
relationName=="Old")
Then
contact.getStatus().setStatus(true);
contact.getStatus().addToReasonTrace(drools.getRule().getName());
end
..The bove works.
BUT, when I do the following:
When
cntct:Contact (initialized==true)
exr:Relation( contact==cntct,
active:active==$1,
relationName=="Old")
|| Relation( contact==cntct,
active:active==$1,
relationName==null)
Then
contact.getStatus().setStatus(true);
contact.getStatus().addToReasonTrace(drools.getRule().getName());
end
... The script compiles anda stateless Session is created successfully,
but at
runtime/execution it fails with the exception:
java.lang.ClassCastException: com.arjun.brms.businessObjects.Contact
org.drools.rule.EvalCondition.isAllowed(EvalCondition.java:75)
org.drools.reteoo.EvalConditionNode.assertTuple(EvalConditionNode.java
:141)
org.drools.reteoo.SingleTupleSinkAdapter.propagateAssertTuple
(SingleTupleSinkAdapter.java:20)
org.drools.reteoo.JoinNode.assertTuple(JoinNode.java:120)
org.drools.reteoo.SingleTupleSinkAdapter.propagateAssertTuple
(SingleTupleSinkAdapter.java:20)
org.drools.reteoo.JoinNode.assertObject(JoinNode.java:162)
org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject
(CompositeObjectSinkAdapter.java:317)
org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:130)
org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject
(CompositeObjectSinkAdapter.java:308)
org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:130)
org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject
(CompositeObjectSinkAdapter.java:308)
org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:168)
org.drools.reteoo.Rete.assertObject(Rete.java:168)
org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:190)
org.drools.reteoo.ReteooWorkingMemory.doInsert(ReteooWorkingMemory.java
:70)
org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java
:848)
org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java
:822)
org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java
:623)
Class diagram:
~~~~~~~~~~~~~~~~
Contact<-- bi-directional association -->List<Relation>
Please advise! is this a bug?
thanks,
Arjun
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Edson Tirelli
Software Engineer - JBoss Rules Core Developer
Office: +55 11 3529-6000
Mobile: +55 11 9287-5646
JBoss, a division of Red Hat @ www.jboss.com
6:49 p.m.
Thanks, I logged it in JIRA: http://jira.jboss.com/jira/browse/JBRULES-1047
Your suggestions were helpful
Thanks again!
6108
days inactive
6108
days old
3 comments
2 participants
participants (2)
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Arjun Dhar -
Edson Tirelli