[jboss-jira] [JBoss JIRA] Updated: (JBRULES-2751) NullPointerException in DeclarationTypeFixer: An rule compilation error should give a clear errow warning with an indication of which rule is the culprit instead of a NPE

[Geoffrey De Smet (JIRA)]

     [ https://jira.jboss.org/browse/JBRULES-2751?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Geoffrey De Smet updated JBRULES-2751:
--------------------------------------

    Summary: NullPointerException in DeclarationTypeFixer: An rule compilation error should give a clear errow warning with an indication of which rule is the culprit instead of a NPE  (was: NullPointerException in DeclarationTypeFixer: An rule compilation error should give a clear errow warning with an indecation of which rule is the culprit instead of a NPE)


> NullPointerException in DeclarationTypeFixer: An rule compilation error should give a clear errow warning with an indication of which rule is the culprit instead of a NPE
> --------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: JBRULES-2751
>                 URL: https://jira.jboss.org/browse/JBRULES-2751
>             Project: Drools
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>          Components: drools-compiler (expert)
>    Affects Versions: 5.1.1.FINAL
>            Reporter: Geoffrey De Smet
>            Assignee: Edson Tirelli
>             Fix For: 5.2.0.M1
>
>
> {code}
> Exception in thread "main" java.lang.NullPointerException
> 	at org.drools.rule.builder.dialect.java.DeclarationTypeFixer.fix(DeclarationTypeFixer.java:17)
> 	at org.drools.rule.builder.dialect.java.AbstractJavaRuleBuilder.createVariableContext(AbstractJavaRuleBuilder.java:90)
> 	at org.drools.rule.builder.dialect.java.JavaAccumulateBuilder.build(JavaAccumulateBuilder.java:112)
> 	at org.drools.rule.builder.dialect.java.JavaAccumulateBuilder.build(JavaAccumulateBuilder.java:54)
> 	at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:223)
> 	at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:108)
> 	at org.drools.rule.builder.GroupElementBuilder.build(GroupElementBuilder.java:69)
> 	at org.drools.rule.builder.RuleBuilder.build(RuleBuilder.java:79)
> 	at org.drools.compiler.PackageBuilder.addRule(PackageBuilder.java:1149)
> 	at org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:631)
> 	at org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:270)
> 	at org.drools.planner.config.localsearch.LocalSearchSolverConfig.buildRuleBase(LocalSearchSolverConfig.java:209)
> 	at org.drools.planner.config.localsearch.LocalSearchSolverConfig.buildSolver(LocalSearchSolverConfig.java:186)
> 	at org.drools.planner.config.XmlSolverConfigurer.buildSolver(XmlSolverConfigurer.java:93)
> 	at org.drools.planner.examples.cloudbalancing.app.CloudBalancingApp.createSolver(CloudBalancingApp.java:43)
> 	at org.drools.planner.examples.common.app.CommonApp.createSolutionBusiness(CommonApp.java:59)
> 	at org.drools.planner.examples.common.app.CommonApp.<init>(CommonApp.java:38)
> 	at org.drools.planner.examples.cloudbalancing.app.CloudBalancingApp.<init>(CloudBalancingApp.java:30)
> 	at org.drools.planner.examples.cloudbalancing.app.CloudBalancingApp.main(CloudBalancingApp.java:36)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:597)
> 	at com.intellij.rt.execution.application.AppMain.main(AppMain.java:115)
> {code}
> Here's the rule which causes this:
> {code}
> rule "minimalCpuPowerTotal"
>     when
>         $cloudComputer : CloudComputer($cpuPower : cpuPower)
>         $minimalCpuPowerTotal : Number(intValue > $cpuPower) from accumulate(
>             CloudAssignment(
>                 cloudComputer == $cloudComputer,
>                 $minimalCpuPower : minimalCpuPower), // This is the problem, CloudAssignment.getMinimalCpuPower does not exist yet
>             sum($minimalCpuPower)
>         )
>     then
>         insertLogical(new IntConstraintOccurrence("minimalCpuPowerTotal", ConstraintType.NEGATIVE_HARD,
>                 $minimalCpuPowerTotal - $cpuPower,
>                 $cloudComputer));
> end
> {code}
> CloudAssignment did not have a getter for minimalCpuPower yet.
> The compilation error should clearly say that its the rule minimalCpuPowerTotal which has a problem and that the getter for the field minimalCpuPower wasn't found.

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