[jboss-jira] [JBoss JIRA] Closed: (JBRULES-1096) NPE when using "exists" with "from"

[Edson Tirelli (JIRA)]

     [ http://jira.jboss.com/jira/browse/JBRULES-1096?page=all ]

Edson Tirelli closed JBRULES-1096.
----------------------------------

    Resolution: Done

Fixed and added integration tests. This is a regression introduced when we refactored patterns to have a source field.

> NPE when using "exists" with "from"
> -----------------------------------
>
>                 Key: JBRULES-1096
>                 URL: http://jira.jboss.com/jira/browse/JBRULES-1096
>             Project: JBoss Rules
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>          Components: Reteoo, Drl Parser/Builder
>    Affects Versions:  4.0.0.GA
>            Reporter: Edson Tirelli
>         Assigned To: Edson Tirelli
>             Fix For: 4.0.1
>
>
> NPE when adding a package with the following rule to a rulebase:
> package org.drools;
> global java.util.List results;
> rule "exists with from"
> 	when
> 		Cheesery( $cheeses : cheeses ) 
> 		exists( Cheese( type == "stilton" ) from $cheeses )
> 	then
> 		results.add( "true" );
> end
> java.lang.NullPointerException
> 	at org.drools.reteoo.builder.BuildUtils.createBetaNodeConstraint(BuildUtils.java:168)
> 	at org.drools.reteoo.builder.GroupElementBuilder$ExistsBuilder.build(GroupElementBuilder.java:306)
> 	at org.drools.reteoo.builder.GroupElementBuilder.build(GroupElementBuilder.java:70)
> 	at org.drools.reteoo.builder.GroupElementBuilder$AndBuilder.build(GroupElementBuilder.java:112)
> 	at org.drools.reteoo.builder.GroupElementBuilder.build(GroupElementBuilder.java:70)
> 	at org.drools.reteoo.builder.ReteooRuleBuilder.addSubRule(ReteooRuleBuilder.java:136)
> 	at org.drools.reteoo.builder.ReteooRuleBuilder.addRule(ReteooRuleBuilder.java:109)
> 	at org.drools.reteoo.ReteooBuilder.addRule(ReteooBuilder.java:116)
> 	at org.drools.reteoo.ReteooRuleBase.addRule(ReteooRuleBase.java:262)
> 	at org.drools.common.AbstractRuleBase.addPackage(AbstractRuleBase.java:337)
> 	at org.drools.integrationtests.FirstOrderLogicTest.testExistsWithFrom(FirstOrderLogicTest.java:717)
> 	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:585)
> 	at junit.framework.TestCase.runTest(TestCase.java:154)
> 	at junit.framework.TestCase.runBare(TestCase.java:127)
> 	at junit.framework.TestResult$1.protect(TestResult.java:106)
> 	at junit.framework.TestResult.runProtected(TestResult.java:124)
> 	at junit.framework.TestResult.run(TestResult.java:109)
> 	at junit.framework.TestCase.run(TestCase.java:118)
> 	at junit.framework.TestSuite.runTest(TestSuite.java:208)
> 	at junit.framework.TestSuite.run(TestSuite.java:203)
> 	at org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(JUnit3TestReference.java:128)
> 	at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
> 	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:460)
> 	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673)
> 	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386)
> 	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)

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