QuickFIX/J

The data dictionary is optional, so you'll need to handle the case of not having a data dictionary to determine admin vs. application messages.

In the absence of a data dictionary we can use the hardwired admin/app classifications but allow that to be overridden by the data dictionary.

I've looked at this and it's a bit tricky since there are several places in the code where we don't have a data dictionary and we must determine if the message is an application message or not. I've added predicates to the data dictionary to determine the category of the message, but more work is needed to convert the code to use every place.