PM39499: NPE after changing default value of an const attribute in a .cpp file

APAR status

• Closed as program error.

Error description

• VAR = 50;
  12. Run the c++ to UML reverse transformation
  Result.
  The Merge dialog opens empty.
  When you click on 'Cancel', the following dialog appears:
  Transformation execution status. Merging of changes into target
  model failed. Transform context stack Transform C++ To UML
  Transformation: Element 'Setting up for reconcile' was executing
  source '[P/TestCPP]' and the following error is output in the
  log.
  
  !ENTRY com.ibm.xtools.comparemerge.emf 4 0 2011-05-16
  13:10:26.562
  !MESSAGE Error occurred while opening Combine Models session:
  java.lang.NullPointerException
  !STACK 0
  java.lang.NullPointerException
  at
  com.ibm.xtools.transform.cpp.uml2.internal.CPPModelToUML.rules.S
  etupReconcileRule$PrimitiveTypeConversionExtFilter.filterDelta(U
  nknown
  Source)
  at
  com.ibm.xtools.comparemerge.emf.deltatree.internal.FuseDeltaTree
  Filter.isFilterOutDelta(Unknown
  Source)
  at
  com.ibm.xtools.comparemerge.emf.deltatree.DeltaTreeBuilder.isFil
  terOutDelta(Unknown
  Source)
  at
  com.ibm.xtools.comparemerge.emf.deltatree.DeltaTreeBuilder.creat
  eVisibleDiffNode(Unknown
  Source)
  at
  com.ibm.xtools.comparemerge.emf.deltatree.DeltaTreeBuilder.build
  DeltaTree(Unknown
  Source)
  at
  com.ibm.xtools.comparemerge.emf.deltatree.DeltaTreeBuilder.build
  DeltaCompositeNode(Unknown
  Source)
  at
  com.ibm.xtools.comparemerge.emf.deltatree.DeltaTreeBuilder.build
  DeltaTree(Unknown
  Source)
  
  ...
  
  Workaround:
  
  As a workaround switch off the filter 'Filter out Primitive type
  conversion changes'.
  Before changing the default value for the attribute (step 11)
  1 Run the reverse transform on the same Transformation
  configuration (created in step 9).
  2. On the merge dialog open up the filters sections and switch
  off the  'Filter out Primitive type conversion changes' filter.
  4. Change again the default value of the attribute and run the
  reverse transform.
  This time your should not get the exceptions and the change
  default value should be shown as a delta.
  The drawback is that the 'int' type is lost in the
  transformation and is shown as a delta as well (unselected by
  default). If you choose to select on the default value change
  then the type of the attribute would be intact and the change in
  the default value will be also captured.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  Running the C++ to UML transformation after changing the
  default value of a static member variable generated by the
  UML-to-C++ transformation, throws NullPointer Exception.
  

Problem conclusion

• C++ to UML transformation now shows the static attribute's
  default value changes on the merge dialog.
  

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

  RSA-SE WIN

• Fixed component ID

  5724V8800

Applicable component levels

• R753 PSN

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