[jboss-jira] [JBoss JIRA] Resolved: (JBRULES-579) NPE when imports not available

[Edson Tirelli (JIRA)]

     [ http://jira.jboss.com/jira/browse/JBRULES-579?page=all ]

Edson Tirelli resolved JBRULES-579.
-----------------------------------

    Fix Version/s: 3.1-m1
       Resolution: Done

$ svn log -r 8315 -v
------------------------------------------------------------------------
r8315 | tirelli | 2006-12-14 13:02:20 -0300 (Thu, 14 Dec 2006) | 1 line
Changed paths:
   M /labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/semantics/java/RuleBuilder.java
   M /labs/jbossrules/trunk/drools-compiler/src/test/java/org/drools/integrationtests/IntegrationCases.java
   A /labs/jbossrules/trunk/drools-compiler/src/test/resources/org/drools/integrationtests/test_missing_import.drl

JBRULES-579: fixing NPE when not able to resolve object types for 'from', 'collect' and 'accumulate' constructs
------------------------------------------------------------------------

> NPE when imports not available
> ------------------------------
>
>                 Key: JBRULES-579
>                 URL: http://jira.jboss.com/jira/browse/JBRULES-579
>             Project: JBoss Rules
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>    Affects Versions: 3.1-m1
>            Reporter: Edson Tirelli
>         Assigned To: Edson Tirelli
>             Fix For: 3.1-m1
>
>
> REPORTED BY DIRK BERGSTROM:
> ------------------------------------------------
> Trying to compile this rule, I get an NPE:
> package foo;
> rule "Generates NPE"
>   when
>     $count : Thing( size > 0 ) from collect( Gizmo( length == 1 ) )
>   then
>     System.out.println("boo");
> end
> Like so:
> java.lang.NullPointerException
> at org.drools.rule.Rule.addDeclarations(Rule.java:316)
> at org.drools.rule.Rule.addPattern(Rule.java:304)
> at org.drools.semantics.java.RuleBuilder.build(RuleBuilder.java:320)
> at org.drools.semantics.java.RuleBuilder.build(RuleBuilder.java:215)
> at org.drools.compiler.PackageBuilder.addRule(PackageBuilder.java:366)
> at org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:215)
> at org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:181)
> at net.juniper.dash.DroolsTest.readRule(DroolsTest.java:106)
> at net.juniper.dash.DroolsTest.main(DroolsTest.java:22)
> This happens when there are two undefined classes referenced in a rule, with the
> second one inside a collect() statement.  If I import Thing, or import Gizmo, or
> have a constraint on Gizmo not in a collect(), I get a parser exception, as
> expected.
> This is with Trunk, revision 8110.

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