RS03821: NULLPOINTEREXCEPTION BUILDING RULEPROJECT THAT HAVE GENERIC CLASSES

APAR status

• Closed as program error.

Error description

• When generating a Ruleset archive in Rule Designer, there is a
  NullPointerException thrown due to the declaration of this kind
  of methods:
  
  public void method(E<? extends C<?, ?>> param)
  with a generic class C declared as  public class C<T extends
  D<T, S>, S>
  
  
  The following stacktrace could be found in the log
  
  !ENTRY ilog.rules.studio.shared
  !MESSAGE An error occurred during the export of the ruleset
  archive.
  !STACK 0
  com.ibm.rules.container.EngineOutlineSerializationException:
  java.lang.NullPointerException
  at com.ibm.rules.container.EnginePackageOpenXMLProducer.writeJa
  r(EnginePackageOpenXMLProducer.java:269)
  at com.ibm.rules.container.EnginePackageOpenXMLProducer.writeJa
  r(EnginePackageOpenXMLProducer.java:277)
  at com.ibm.rules.container.EngineOutlineSerializer.writeJar(Eng
  ineOutlineSerializer.java:48)
  at com.ibm.rules.studio.rve.builder.RVERulesetArchiveExporter.s
  erializeEngineOutline(RVERulesetArchiveExporter.java:743)
  at com.ibm.rules.studio.rve.builder.RVERulesetArchiveExporter.e
  xport(RVERulesetArchiveExporter.java:432)
  at com.ibm.rules.studio.decisionservice.SDsRVERulesetArchiveExp
  orter.export(SDsRVERulesetArchiveExporter.java:134)
  at ilog.rules.studio.model.archive.internal.RulesetArchiveExpor
  tJob.run(RulesetArchiveExportJob.java:65)
  at org.eclipse.core.internal.jobs.Worker.run(Worker.java:56)
  Caused by: java.lang.NullPointerException
  at com.ibm.rules.engine.lang.semantics.util.generics.SemGeneric
  Parameters.hashCode(SemGenericParameters.java:74)
  at java.util.HashMap.hash(HashMap.java:350)
  at java.util.HashMap.get(HashMap.java:568)
  at com.ibm.rules.engine.lang.semantics.impl.GenericInstanceStor
  e.getInstance(GenericInstanceStore.java:143)
  at com.ibm.rules.engine.lang.semantics.impl.GenericInstanceStor
  e.getInstance(GenericInstanceStore.java:139)
  at com.ibm.rules.engine.lang.semantics.impl.SemNativeGenericCla
  ssImpl.bindGenericParameters(SemNativeGenericClassImpl.java:123)
  at com.ibm.rules.engine.lang.semantics.java.SemJava5GenericBind
  ing.mapNativeType(SemJava5GenericBinding.java:253)
  at com.ibm.rules.engine.lang.semantics.java.SemJava5GenericBind
  ing.bindTypeVariable(SemJava5GenericBinding.java:358)
  at com.ibm.rules.engine.lang.semantics.java.SemJava5GenericBind
  ing.getNativeGenericClass(SemJava5GenericBinding.java:111)
  at com.ibm.rules.engine.lang.semantics.java.SemJava5GenericBind
  ing.mapNativeType(SemJava5GenericBinding.java:251)
  at com.ibm.rules.engine.lang.semantics.java.SemJava5GenericBind
  ing.mapWildcardType(SemJava5GenericBinding.java:300)
  at com.ibm.rules.engine.lang.semantics.java.SemJava5GenericBind
  ing.mapNativeType(SemJava5GenericBinding.java:264)
  at com.ibm.rules.engine.lang.semantics.java.SemJava5GenericBind
  ing.mapNativeType(SemJava5GenericBinding.java:249)
  at com.ibm.rules.engine.lang.semantics.java.SemJava5Binding.map
  Parameters(SemJava5Binding.java:581)
  at com.ibm.rules.engine.lang.semantics.java.SemJava5Binding.cre
  ateMethod(SemJava5Binding.java:555)
  at com.ibm.rules.engine.lang.semantics.java.SemJava5Binding.cre
  ateMethods(SemJava5Binding.java:422)
  at com.ibm.rules.engine.lang.semantics.impl.SemNativeClassImpl$
  NativeInfo.createMethods(SemNativeClassImpl.java:129)
  at com.ibm.rules.engine.lang.semantics.impl.SemNativeClassImpl.
  loadMethods(SemNativeClassImpl.java:240)
  at com.ibm.rules.engine.lang.semantics.impl.SemAbstractLazyLoad
  ingClass.getMethods(SemAbstractLazyLoadingClass.java:139)
  at com.ibm.rules.engine.lang.semantics.SemClassExtra.computeAll
  Methods(SemClassExtra.java:377)
  at com.ibm.rules.engine.lang.semantics.SemClassExtra.getAllMeth
  ods(SemClassExtra.java:324)
  at com.ibm.rules.engine.lang.semantics.SemClassExtra.getMatchin
  gMethods(SemClassExtra.java:529)
  at com.ibm.rules.engine.lang.semantics.SemClassExtra.getMatchin
  gMethod(SemClassExtra.java:483)
  at com.ibm.rules.engine.lang.semantics.SemClassExtra.getMatchin
  gMethod(SemClassExtra.java:477)
  at com.ibm.rules.engine.b2x.checking.CkgMemberDeclarationChecke
  r.getMethod(CkgMemberDeclarationChecker.java:978)
  at com.ibm.rules.engine.b2x.checking.CkgMemberDeclarationChecke
  r.lookForXOMMethod(CkgMemberDeclarationChecker.java:520)
  at com.ibm.rules.engine.b2x.checking.CkgMemberDeclarationChecke
  r.checkMethod(CkgMemberDeclarationChecker.java:750)
  at com.ibm.rules.engine.b2x.checking.CkgMemberDeclarationChecke
  r.visitMembers(CkgMemberDeclarationChecker.java:188)
  at com.ibm.rules.engine.b2x.checking.CkgMemberDeclarationChecke
  r.visit(CkgMemberDeclarationChecker.java:159)
  at com.ibm.rules.engine.b2x.checking.CkgMemberDeclarationChecke
  r.visit(CkgMemberDeclarationChecker.java:48)
  at com.ibm.rules.engine.lang.semantics.impl.SemClassImpl.accept
  (SemClassImpl.java:585)
  at com.ibm.rules.engine.b2x.checking.CkgB2XChecker.processMembe
  rDeclarations(CkgB2XChecker.java:225)
  at com.ibm.rules.engine.b2x.transform.B2XMainLangTransformer.tr
  ansformMemberDeclarations(B2XMainLangTransformer.java:135)
  at com.ibm.rules.engine.lang.semantics.transform.SemMainLangTra
  nsformer.transformObjectModel(SemMainLangTransformer.java:252)
  at com.ibm.rules.engine.outline.B2XModelTranslator$B2XRewriter.
  transform(B2XModelTranslator.java:355)
  at com.ibm.rules.engine.outline.EngineOutlineImpl.applyModelRew
  riters(EngineOutlineImpl.java:450)
  at com.ibm.rules.engine.outline.EngineOutlineImpl.applyModelRew
  riters(EngineOutlineImpl.java:425)
  at com.ibm.rules.engine.outline.EngineOutlineImpl.writeJarInStr
  eam(EngineOutlineImpl.java:543)
  at com.ibm.rules.container.EnginePackageOpenXMLProducer.writeJa
  r(EnginePackageOpenXMLProducer.java:262)
  ... 7 more
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * Rule Designer users.                                         *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * In some cases, generic generation throws                     *
  * nullpointerexception.                                        *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  

Problem conclusion

• The code was fixed.
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  WDS FOR RULES

• Fixed component ID

  5725B6903

Applicable component levels