[rules-users] Issue with From Clause - Class Cast Error
Hi All,
I am having a very strange issue with my knowledge base... I have the
following Rule:
...
rule "root_host"
no-loop true
ruleflow-group 'initialize-appliance-definitions'
when
$app:ApplianceType
(
type == ApplianceTypeIdentifier.APPLIANCE_ROOT
);
not( ApplianceTypeObject() from $app.getObjectTypes());
then
//Do something
end;
...
And the ApplianceType class is defined as:
...
public class ApplianceType
{
private ApplianceTypeIdentifier type;
private List<ApplianceTypeObject> objectTypes;
public ApplianceType(ApplianceTypeIdentifier type,
List<ApplianceTypeObject> initialObjectTypes)
{
this.type = type;
if(initialObjectTypes == null)
this.objectTypes = new ArrayList<ApplianceTypeObject>();
else
this.objectTypes = initialObjectTypes;
}
public ApplianceType(ApplianceTypeIdentifier type)
{
this(type, null);
}
public ApplianceTypeIdentifier getType()
{
return type;
}
public List<ApplianceTypeObject> getObjectTypes() {
return objectTypes;
}
}
When attempting to fireAllRules() I receive the following error:
...
Caused by: java.lang.ClassCastException: org.drools.reteoo.FromNode
incompatible with org.drools.reteoo.BetaNode
at org.drools.reteoo.ReteooBuilder.resetMasks(ReteooBuilder.java:303)
at org.drools.reteoo.ReteooBuilder.removeRule(ReteooBuilder.java:267)
at org.drools.reteoo.ReteooRuleBase.removeRule(ReteooRuleBase.java:459)
at
org.drools.common.AbstractRuleBase.removeRule(AbstractRuleBase.java:1107)
at
org.drools.common.AbstractRuleBase.mergePackage(AbstractRuleBase.java:851)
at
org.drools.common.AbstractRuleBase.addPackages(AbstractRuleBase.java:610)
at org.drools.reteoo.ReteooRuleBase.addPackages(ReteooRuleBase.java:472)
at
org.drools.impl.KnowledgeBaseImpl.addKnowledgePackages(KnowledgeBaseImpl.java:150)
at
com.q1labs.frameworks.drools.DroolsEngine.getKnowledgeBase(DroolsEngine.java:139)
at com.q1labs.frameworks.drools.DroolsEngine.onInit(DroolsEngine.java:50)
at
com.q1labs.frameworks.naming.FrameworksNaming.initializeNewComponent(FrameworksNaming.java:951)
... 3 more
Any thoughts? I have been using from clauses just like this throughout my
project, and have had no issues with it to this point (even those which did
not use generics).
--
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