hi people,
today I finished a first implementation of the validation framework used in AndroMDA, in fact the framework has been put in place by Chad some time ago but the OCL constraints weren't translated yet into compilable Java code because the translation still needed to be written (only EJBQL and HypersonicQL were supported).
so a first rough version of this OCL-to-Java translator has been put in CVS now, it seems to work for the most common constraints
what does this concretely mean ? well, each andromda cartridge will now be able to check and validate model constraints, for example in bpm4struts the cartridge will now complain if it detects two use-cases with the same name, or when an activity graph has no controller context,... stuff like that
therefore the cartridge will warn you with a message indicating what is wrong, this is much better than an exception behind which the error hidden in deep
the only things to do now are to implement some more OCL advanced features, but we'll do that when we need them (lazily), more important (at least IMO) is how the error messages will be displayed, currently they are shown as a stack trace which might be a little too much, so we'll need to filter out the model validation exceptions and only print the message, should be straightforward enough.
I know a lot of people were asking for this, and now it is there; I can tell you with more confidence that the next milestone (3.0M2) will feature this improvement and it is very likely we'll release it soon, but that's not up to me alone to decide.
for the eager beavers: sync with CVS (at least 8 hours from now) to get the latest sources, I'm not sure what will happen with the bootstrap dependencies since the teamserver is down and we cannot boot it (only Matthias can do that, and he's abroad), if enough people are interested I will post the bootstrap dependencies elsewhere so we all can build with online support
cheers, and good luck
-- Wouter
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