Hi Ed,
After adding a catch _expression_ for Invalid
values while evaluation initializer expressions I realized
that both the middle model and the output model where not
being generated properly.
I noticed some errors in the RDBMS
metamodel and after fixing and doing some more tests I was
able to fix another couple of bugs in the evaluation visitor
which caused strange bindings in the middle model.
After fixing this I am now getting another
exception, which I think is an OCL issue.
In the UML2RDBMS QVTi transformation, line
356 we have:
fc.type := rk.column->first().type;
which was giving: InvalidValueException:
'Sequence' rather than 'OclVoid' value required
After debugging the evaluation if the OCL _expression_ I found
that when visiting the rk.column _expression_, there is a method
to get the value of the property (column of rk).
This method invokes evaluate method in
CompoistionProperty.java, in line 45 the eContainer of the
variable is fetched, and in this case the container is null
(the key has not yet been assigned an owner?). Then the method
returns null (line 46: if (eContainer == null) { return null }
)
and then back in visitOperationCallExp the
sourceValue variable will be set to null, and hence I get a
the exception.
Why is the need for the container not to be
null and why if it is null the value of the variable is
returned as null?
Regards,
Horacio Hoyos Rodríguez
EngD Student
University of York
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