[jboss-jira] [JBoss JIRA] (JBRULES-3627) NPE using a null literal in the left part of a constraint

[Mario Fusco (JIRA)]

     [ https://issues.jboss.org/browse/JBRULES-3627?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mario Fusco resolved JBRULES-3627.
----------------------------------

    Resolution: Done

    
> NPE using a null literal in the left part of a constraint
> ---------------------------------------------------------
>
>                 Key: JBRULES-3627
>                 URL: https://issues.jboss.org/browse/JBRULES-3627
>             Project: Drools
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>            Reporter: Mario Fusco
>            Assignee: Mario Fusco
>
> Trying to use a constraint with a null literal on its left side like in:
> Person( null == name )
> generates the following exception:
> java.lang.NullPointerException
> at java.lang.String.<init>(String.java:177)
> at org.mvel2.util.ErrorUtil.rewriteIfNeeded(ErrorUtil.java:12)
> at org.mvel2.compiler.ExpressionCompiler._compile(ExpressionCompiler.java:302)
> at org.mvel2.compiler.ExpressionCompiler.compile(ExpressionCompiler.java:62)
> at org.mvel2.MVEL.compileExpression(MVEL.java:810)
> at org.drools.base.mvel.MVELCompilationUnit.compile(MVELCompilationUnit.java:442)
> at org.drools.base.mvel.MVELCompilationUnit.getCompiledExpression(MVELCompilationUnit.java:238)
> at org.drools.rule.constraint.MvelConstraint.createMvelConditionEvaluator(MvelConstraint.java:173)
> at org.drools.rule.constraint.MvelConstraint.evaluate(MvelConstraint.java:157)
> at org.drools.rule.constraint.MvelConstraint.isAllowed(MvelConstraint.java:124)
> at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:137)
> at org.drools.reteoo.CompositeObjectSinkAdapter.doPropagateAssertObject(CompositeObjectSinkAdapter.java:497)
> at org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:382)
> at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:141)
> at org.drools.reteoo.CompositeObjectSinkAdapter.doPropagateAssertObject(CompositeObjectSinkAdapter.java:497)
> at org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:382)
> at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:235)
> at org.drools.reteoo.EntryPointNode.assertObject(EntryPointNode.java:240)
> at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:337)
> at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:298)
> at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:888)
> at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:847)
> at org.drools.impl.StatefulKnowledgeSessionImpl.insert(StatefulKnowledgeSessionImpl.java:269)
> at org.drools.impl.StatelessKnowledgeSessionImpl.execute(StatelessKnowledgeSessionImpl.java:303)

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