[jboss-jira] [JBoss JIRA] (DROOLS-27) NPE ClassTypeResolver.resolveType

[Marc Dzaebel (JIRA)]

     [ https://issues.jboss.org/browse/DROOLS-27?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Marc Dzaebel updated DROOLS-27:
-------------------------------

    Description: 
Declaring a type that extends an imported declared type leads to Null Pointer.

According to the documentation at http://docs.jboss.org/drools/release/5.5.0.Final/drools-expert-docs/html/ch04.html#d0e5060
it should be possible to declare:

{quote}
import org.people.Person
declare Person end
declare Student extends Person end
{quote}

However, adding the last line, leads to an NPE during readKnowledgeBase:
{color:red}
java.lang.NullPointerException
	at org.drools.base.ClassTypeResolver.resolveType(ClassTypeResolver.java:130)
	at org.drools.compiler.PackageBuilder.isNovelClass(PackageBuilder.java:2291)
	at org.drools.compiler.PackageBuilder.generateDeclaredBean(PackageBuilder.java:2473)
	at org.drools.compiler.PackageBuilder.processTypeDeclarations(PackageBuilder.java:2133)
	at org.drools.compiler.PackageBuilder.mergePackage(PackageBuilder.java:1272)
	at org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:869)
	at org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:466)
	at org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:694)
	at org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:51)
	at org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:40)
	at com.sample.DroolsTest.readKnowledgeBase(DroolsTest.java:40)
	at com.sample.DroolsTest.main(DroolsTest.java:23)
{color}

To reproduce simply:
- *Create a Drools Project*
- *Add the following lines to Sample.drl*
  {{declare Message end}}
  {{declare Any extends Message end}}
- *Run*

  was:
Declaring a type that extends an imported type leads to Null Pointer.

According to the documentation at http://docs.jboss.org/drools/release/5.5.0.Final/drools-expert-docs/html/ch04.html#d0e5060
it should be possible to declare:

{quote}
import org.people.Person
declare Person end
declare Student extends Person end
{quote}

However, adding the last line, leads to an NPE during readKnowledgeBase:
{color:red}
java.lang.NullPointerException
	at org.drools.base.ClassTypeResolver.resolveType(ClassTypeResolver.java:130)
	at org.drools.compiler.PackageBuilder.isNovelClass(PackageBuilder.java:2291)
	at org.drools.compiler.PackageBuilder.generateDeclaredBean(PackageBuilder.java:2473)
	at org.drools.compiler.PackageBuilder.processTypeDeclarations(PackageBuilder.java:2133)
	at org.drools.compiler.PackageBuilder.mergePackage(PackageBuilder.java:1272)
	at org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:869)
	at org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:466)
	at org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:694)
	at org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:51)
	at org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:40)
	at com.sample.DroolsTest.readKnowledgeBase(DroolsTest.java:40)
	at com.sample.DroolsTest.main(DroolsTest.java:23)
{color}

To reproduce simply:
- *Create a Drools Project*
- *Add the following lines to Sample.drl*
  {{declare Message end}}
  {{declare Any extends Message end}}
- *Run*


    
> NPE ClassTypeResolver.resolveType
> ---------------------------------
>
>                 Key: DROOLS-27
>                 URL: https://issues.jboss.org/browse/DROOLS-27
>             Project: Drools
>          Issue Type: Feature Request
>      Security Level: Public(Everyone can see) 
>    Affects Versions: 5.5
>         Environment: Eclipse Juno SR1, JDK 1.7, Win8
>            Reporter: Marc Dzaebel
>            Assignee: Mark Proctor
>            Priority: Blocker
>
> Declaring a type that extends an imported declared type leads to Null Pointer.
> According to the documentation at http://docs.jboss.org/drools/release/5.5.0.Final/drools-expert-docs/html/ch04.html#d0e5060
> it should be possible to declare:
> {quote}
> import org.people.Person
> declare Person end
> declare Student extends Person end
> {quote}
> However, adding the last line, leads to an NPE during readKnowledgeBase:
> {color:red}
> java.lang.NullPointerException
> 	at org.drools.base.ClassTypeResolver.resolveType(ClassTypeResolver.java:130)
> 	at org.drools.compiler.PackageBuilder.isNovelClass(PackageBuilder.java:2291)
> 	at org.drools.compiler.PackageBuilder.generateDeclaredBean(PackageBuilder.java:2473)
> 	at org.drools.compiler.PackageBuilder.processTypeDeclarations(PackageBuilder.java:2133)
> 	at org.drools.compiler.PackageBuilder.mergePackage(PackageBuilder.java:1272)
> 	at org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:869)
> 	at org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:466)
> 	at org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:694)
> 	at org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:51)
> 	at org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:40)
> 	at com.sample.DroolsTest.readKnowledgeBase(DroolsTest.java:40)
> 	at com.sample.DroolsTest.main(DroolsTest.java:23)
> {color}
> To reproduce simply:
> - *Create a Drools Project*
> - *Add the following lines to Sample.drl*
>   {{declare Message end}}
>   {{declare Any extends Message end}}
> - *Run*

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