[jboss-jira] [JBoss JIRA] Updated: (JBRULES-1264) NPE at BaseObjectClassFieldExtractor.getLongValue with null fields

[Mark Proctor (JIRA)]

     [ http://jira.jboss.com/jira/browse/JBRULES-1264?page=all ]

Mark Proctor updated JBRULES-1264:
----------------------------------

    Attachment: JBRULES-1264.patch

this patch is applied to trunk and needs to be applied to 4.0.x and 4.1.x

> NPE at BaseObjectClassFieldExtractor.getLongValue with null fields
> ------------------------------------------------------------------
>
>                 Key: JBRULES-1264
>                 URL: http://jira.jboss.com/jira/browse/JBRULES-1264
>             Project: JBoss Drools
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>    Affects Versions: 4.0.2
>            Reporter: Alexandre Gattiker
>         Assigned To: Mark Proctor
>         Attachments: JBRULES-1264.patch
>
>
> Removing one of the three rules magically solves the problem.
> java.lang.NullPointerException
> 	at org.drools.base.extractors.BaseObjectClassFieldExtractor.getLongValue(BaseObjectClassFieldExtractor.java:106)
> 	at org.drools.base.ClassFieldExtractor.getLongValue(ClassFieldExtractor.java:203)
> 	at org.drools.reteoo.CompositeObjectSinkAdapter$HashKey.setValue(CompositeObjectSinkAdapter.java:467)
> 	at org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:292)
> 	at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:153)
> 	at org.drools.reteoo.Rete.assertObject(Rete.java:177)
> 	at org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:201)
> 	at org.drools.reteoo.ReteooWorkingMemory.doInsert(ReteooWorkingMemory.java:71)
> 	at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:886)
> 	at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:858)
> 	at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:659)
> 	at com.sample.DroolsTest.main(DroolsTest.java:21)
> package com.sample;
> import java.io.InputStreamReader;
> import java.io.Reader;
> import org.drools.RuleBase;
> import org.drools.RuleBaseFactory;
> import org.drools.WorkingMemory;
> import org.drools.compiler.PackageBuilder;
> import org.drools.rule.Package;
> public class DroolsTest
> {
>     public static final void main(String[] args)
>     {
>         try
>         {
>             RuleBase ruleBase = readRule();
>             WorkingMemory workingMemory = ruleBase.newStatefulSession();
>             workingMemory.insert(new Attribute());
>             workingMemory.insert(new Message());
>             workingMemory.fireAllRules();
>         }
>         catch (Throwable t)
>         {
>             t.printStackTrace();
>         }
>     }
>     private static RuleBase readRule() throws Exception
>     {
>         Reader source = new InputStreamReader(DroolsTest.class.getResourceAsStream("/Sample.drl"));
>         PackageBuilder builder = new PackageBuilder();
>         builder.addPackageFromDrl(source);
>         Package pkg = builder.getPackage();
>         RuleBase ruleBase = RuleBaseFactory.newRuleBase();
>         ruleBase.addPackage(pkg);
>         return ruleBase;
>     }
>     public static class Message
>     {
>         //empty
>     }
>     public static class Attribute
>     {
>         public Integer getValue()
>         {
>             return null;
>         }
>     }
> }
> package com.sample
>  
> import com.sample.DroolsTest.Message;
> import com.sample.DroolsTest.Attribute;
>  
> rule "rule_1"
> 	
> 	when
> 		Message()
> 		Attribute(value == 1)
> 	then
> 		System.err.println("case 1");
> end
> rule "rule_2"
> 	
> 	when
> 		Message()
> 		Attribute(value == 2)
> 	then
> 		System.err.println("case 2");
> end
> rule "rule_3"
> 	
> 	when
> 		Message()
> 		$a:Attribute(value == 3)
> 	then
> 		System.err.println("case 3");
> end

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