HRESULT STDMETHODCALLTYPE
CEnumAAFFileDescriptors::NextOne (IAAFFileDescriptor ** ppFileDescriptors)
{
HRESULT hr;
ImplEnumAAFFileDescriptors * ptr;
ImplAAFRoot * pO;
pO = GetRepObject ();
assert (pO);
ptr = static_cast<ImplEnumAAFFileDescriptors*> (pO);
assert (ptr);
//
// set up for ppFileDescriptors
//
ImplAAFFileDescriptor * internalppFileDescriptors = NULL;
ImplAAFFileDescriptor ** pinternalppFileDescriptors = NULL;
if (ppFileDescriptors)
{
pinternalppFileDescriptors = &internalppFileDescriptors;
}
try
{
hr = ptr->NextOne
(pinternalppFileDescriptors);
}
catch (OMException& e)
{
// OMExceptions should be handled by the impl code. However, if an
// unhandled OMException occurs, control reaches here. We must not
// allow the unhandled exception to reach the client code, so we
// turn it into a failure status code.
//
// If the OMException contains an HRESULT, it is returned to the
// client, if not, AAFRESULT_UHANDLED_EXCEPTION is returned.
//
hr = OMExceptionToResult(e, AAFRESULT_UNHANDLED_EXCEPTION);
}
catch (OMAssertionViolation &)
{
// Control reaches here if there is a programming error in the
// impl code that was detected by an assertion violation.
// We must not allow the assertion to reach the client code so
// here we turn it into a failure status code.
//
hr = AAFRESULT_ASSERTION_VIOLATION;
}
catch (...)
{
// We CANNOT throw an exception out of a COM interface method!
// Return a reasonable exception code.
//
hr = AAFRESULT_UNEXPECTED_EXCEPTION;
}
//
// cleanup for ppFileDescriptors
//
if (SUCCEEDED(hr))
{
IUnknown *pUnknown;
HRESULT hStat;
if (internalppFileDescriptors)
{
pUnknown = static_cast<IUnknown *> (internalppFileDescriptors->GetContainer());
hStat = pUnknown->QueryInterface(IID_IAAFFileDescriptor, (void **)ppFileDescriptors);
assert (SUCCEEDED (hStat));
//pUnknown->Release();
internalppFileDescriptors->ReleaseReference(); // We are through with this pointer.
}
}
return hr;
}
