[jboss-jira] [JBoss JIRA] (DROOLS-418) MVEL Unable to resolve method exception on fact update

[Davide Sottara (JIRA)]

    [ https://issues.jboss.org/browse/DROOLS-418?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12939928#comment-12939928 ] 

Davide Sottara commented on DROOLS-418:
---------------------------------------

I have just realized that "type == LOW" must be a constraint in a different rule from the one you posted..
I'll run the decision table and get back to you
                
> MVEL Unable to resolve method exception on fact update
> ------------------------------------------------------
>
>                 Key: DROOLS-418
>                 URL: https://issues.jboss.org/browse/DROOLS-418
>             Project: Drools
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>    Affects Versions: 5.5.0.Final
>         Environment: Linux Mint 15
> Jboss 5.1
>            Reporter: Nedo Nedic
>            Assignee: Mark Proctor
>         Attachments: Classifier.xls
>
>
> The following rule will fail with an exception after update is called on a fact:
> 	rule "Classifier"
> 	    no-loop true
> 	    salience 65430
>             when
> 	          $sn:Snort(sig_priority == "1", type == null)
>             then
> 	          $sn.setType("LOW");
> 	          update($sn);
>             end
> Snort fact type declaration:
> 	declare Snort
> 	    @role( event )
> 	    @timestamp( event_date )
> 	    @expires( 1h )
> 	    dport: String
> 	    data: String
> 	    sport: String
> 	    hostname: String
> 	    type: String
> 	    sig_priority: String
> 	    sensor: String
>             id: java.lang.Long
> 	    sig_class_name: String
> 	    ip_dst: String
> 	    sig_name: String
> 	    event_date: java.util.Date
>             ip_src: String
> 	end
> [Error: unable to resolve method: java.util.ArrayList.type() [arglength=0]]
> [Near : {... type == "LOW" ....}]
>              ^
> [Line: 1, Column: 1]
>         at org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.getMethod(ReflectiveAccessorOptimizer.java:1071)
>         at org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.getMethod(ReflectiveAccessorOptimizer.java:980)
>         at org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.getBeanProperty(ReflectiveAccessorOptimizer.java:670)
>         at org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.getBeanPropertyAO(ReflectiveAccessorOptimizer.java:465)
>         at org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileGetChain(ReflectiveAccessorOptimizer.java:370)
>         at org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.optimizeAccessor(ReflectiveAccessorOptimizer.java:140)
>         at org.mvel2.ast.ASTNode.optimize(ASTNode.java:159)
>         at org.mvel2.ast.ASTNode.getReducedValueAccelerated(ASTNode.java:115)
>         at org.mvel2.ast.BinaryOperation.getReducedValueAccelerated(BinaryOperation.java:114)
>         at org.mvel2.MVELRuntime.execute(MVELRuntime.java:86)
>         at org.mvel2.compiler.CompiledExpression.getDirectValue(CompiledExpression.java:123)
>         at org.mvel2.compiler.CompiledExpression.getValue(CompiledExpression.java:119)
>         at org.mvel2.MVEL.executeExpression(MVEL.java:930)
>         at org.drools.rule.constraint.MvelConditionEvaluator.evaluate(MvelConditionEvaluator.java:73)
>         at org.drools.rule.constraint.MvelConditionEvaluator.evaluate(MvelConditionEvaluator.java:52)
>         at org.drools.rule.constraint.MvelConstraint.evaluate(MvelConstraint.java:218)
>         at org.drools.rule.constraint.MvelConstraint.isAllowed(MvelConstraint.java:175)
>         at org.drools.reteoo.AccumulateNode.evaluateResultConstraints(AccumulateNode.java:655)
>         at org.drools.reteoo.ReteooWorkingMemory$EvaluateResultConstraints.execute(ReteooWorkingMemory.java:594)
>         at org.drools.common.PropagationContextImpl.evaluateActionQueue(PropagationContextImpl.java:364)
>         at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:371)
>         at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:327)
>         at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:950)
>         at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:894)
>         at org.drools.impl.StatefulKnowledgeSessionImpl.insert(StatefulKnowledgeSessionImpl.java:269)

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