[jboss-jira] [JBoss JIRA] Closed: (JBRULES-2526) org.drools.rule.InvalidPatternException: "Required Declarations not bound" when using MVEL, and OR-ing evals together

[Edson Tirelli (JIRA)]

     [ https://jira.jboss.org/browse/JBRULES-2526?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Edson Tirelli closed JBRULES-2526.
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> org.drools.rule.InvalidPatternException: "Required Declarations not bound"  when using MVEL, and OR-ing evals together
> ----------------------------------------------------------------------------------------------------------------------
>
>                 Key: JBRULES-2526
>                 URL: https://jira.jboss.org/browse/JBRULES-2526
>             Project: Drools
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>          Components: drools-core  (expert)
>    Affects Versions: 5.1.0.CR1
>            Reporter: Chris DeLashmutt
>            Assignee: Edson Tirelli
>             Fix For: 5.1.0.CR1
>
>         Attachments: mvel-declarations-problem.zip
>
>
> There is an issue when using multiple groups of OR'd evals and the mvel dialect.  Drools is throwing an InvalidPatternException complaining that there are unbound declarations.  During tracing, it seems that the declaration was actually found, but offset for the pattern that is resolved in BuildUtils.checkUnboundDeclarations() line: 239 isn't <= the offset of the pattern that was passed in with the declarations to the method.
> Here is the rule:
> rule "MVEL with OR groups and Evals"
> 	when
>         $fieldB: Field(name == "fieldB")
>         $fieldC: Field(name == "fieldC")
>         $fieldD: Field(name == "fieldD")
>         $fieldE: Field(name == "fieldE")
> 		(
>         	eval($fieldB != null)
>         	|| eval($fieldC != null) 
>         ) 
>         (
>         	eval($fieldD != null)
>         	|| eval($fieldE != null) 
>         )
>     then
>         insert( new Result("Found") );
> end
> Here is the stack trace:
> Thread [main] (Suspended (exception InvalidPatternException))	
> 	BuildUtils.checkUnboundDeclarations(BuildContext, Declaration[]) line: 258	
> 	EvalBuilder.build(BuildContext, BuildUtils, RuleConditionElement) line: 40	
> 	GroupElementBuilder$AndBuilder.build(BuildContext, BuildUtils, RuleConditionElement) line: 130	
> 	GroupElementBuilder.build(BuildContext, BuildUtils, RuleConditionElement) line: 77	
> 	ReteooRuleBuilder.addSubRule(BuildContext, GroupElement, Rule) line: 155	
> 	ReteooRuleBuilder.addRule(Rule, InternalRuleBase, IdGenerator) line: 128	
> 	ReteooBuilder.addRule(Rule) line: 117	
> 	ReteooRuleBase.addRule(Rule) line: 409	
> 	ReteooRuleBase(AbstractRuleBase).addRule(Package, Rule) line: 638	
> 	ReteooRuleBase(AbstractRuleBase).addPackages(Collection<Package>) line: 520	
> 	ReteooRuleBase.addPackage(Package) line: 435	
> 	TestDeclarations.testDeclarations() line: 41	
> ... (some stack removed for clarity)
> 	RemoteTestRunner.main(String[]) line: 197	

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