PM64298: Java to UML transformation fails with: java.lang.Object; incompatible with java.lang.String

APAR status

• Closed as program error.

Error description

• Java to UML transformation fails with: java.lang.Object;
  incompatible with java.lang.String
  
  Transforming a java class into an existing UML model. This
  window appears:
  (See attached screenshot: JavaToUML_TransformationAborted.zip)
  
  Transformation execution status.
  Details:
  java.lang.ClassCastException: [Ljava.lang.Object; incompatible
  with java.lang.String
  [Ljava.lang.Object; incompatible with java.lang.String
    Transform context stack
    [Ljava.lang.Object; incompatible with java.lang.String
      Transform
  com.ibm.xtools.transform.java.uml.GenerateUmlMethodTransform:
  Element
  'com.ibm.xtools.transform.jaxrs.uml2.rules.GenerateMethodStereoR
  ule'
      Transform
  com.ibm.xtools.transform.java.uml.GenerateTransform: Element
  'com.ibm.xtools.transform.java.uml.MethodProxyExtractor' was
  executing source 'c..
      Transform Java to UML: Element
  'com.ibm.xtools.transform.java.uml.extractors.ElementProxyExtrac
  tor'
  was executing source '[L/SCSISessionManager/src/com...
  
  This java class has JAX-RS annotations. Here's an example of
  some of them:
  @Path('get/uniqueId/{ibmUid}/userId/{ibmUserId}')
  @Produces({ 'application/xml', 'text/plain' })
  @GET
  
  This option is checked in the transform:
  
  Comment out the @Produces annotations that have multiple values,
  the transform works fine.
  
  Also, if you change all @Produces annotations to have single
  values, like @Produces('text/plain'), the transform will work.
  
  So, the transform is not able to handle the syntax for
  specifying multiple values in @Produces annotations. Note that
  other classes with @Consumes annotations with mulitple values
  for which the transform also fails.
  
  There are three issues here:
  
  1. As pointed out @Produces and @Consumes of the format {'a',
  'b'} are not being handled and cause an exception in reverse.
  
  2. There is an enum (StatusCode), which is causing NPE while
  running reverse.
  
  3. The Application class SCSIRestApplication method getClasses
  has classes referred without inline fqn of each class. This
  causes reverse not being able to identify can create paths
  between application and resources.
  
  1 and 2 can easily be fixed by workarounds, i.e. using 'a,b,c'
  syntax in @Produces/@Consumes and using fqn of each in
  getClasses. However 3, does not have a workaround, except by
  somehow removing references to the enum in the code first and
  then reversing.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  Reverse transformation sometimes fails with an exception.
  

Problem conclusion

• Reverse transformation now works as expected.
  

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

  RATL SW ARCHITE

• Fixed component ID

  5725A3000

Applicable component levels

• R803 PSN

     UP