[news.eclipse.modeling.mdt.uml2.uml] Re: General help needed for command

[robertssen@xxxxxxxxxxxxxx (Fredrik)]

James, thanks for the link to EMF Transactions. With a RecordingCommand i 
can perfectly do what I intended.

I just have a general question about editing domains: in order to accept a 
recording event, I changed from a UML2AdapterFactoryEditingDomain to a 
TransactionalEditingDomain, simply by changing my old code as shown below.

However, no my old actions do not work anymore, as they access the model 
directly and not via a nice recording actions. So my question is if I can 
somehow use the transactional editing domain for SOME commands, while I 
can still use the old editing domain for my old actions. (So that i can 
migrate my actions step by step...)

In a way, i want both: transactional access for my "new" commands, and 
plain access for those not yet ported. Is that possible?

Thanks in advance,
Fredrik

List factories = new ArrayList();
factories.add(new UMLResourceItemProviderAdapterFactory());
factories.add(new UMLItemProviderAdapterFactory());
factories.add(new EcoreItemProviderAdapterFactory());
factories.add(new UMLReflectiveItemProviderAdapterFactory());
		
BasicCommandStack commandStack = new BasicCommandStack();
adapterFactory = new ComposedAdapterFactory(factories);

// the old editing domain
//umlEditingDomain = new UML2AdapterFactoryEditingDomain(adapterFactory, 
commandStack, new HashMap());

// the new editing domain
umlEditingDomain = new TransactionalEditingDomainImpl(adapterFactory);


James Bruck wrote:

> Hi Fredrik,

> An example of using the ChangeCommand can be found in the
> og.eclipse.uml2.uml.editor.actions.DestroyElementAction.
> Using the ChangeCommand is a good way to go if you want to "undo" and "redo"
> your actions.

> You might benefit from emft-transaction (batched events).   Have a look at:
http://www.eclipse.org/emft/projects/transaction/?project=transaction#transaction

> Cheers,

> -James.


> "Fredrik" <robertssen@xxxxxxxxxxxxxx> wrote in message
> news:52db665ae2bdde7e168a7171471d15db$1@xxxxxxxxxxxxxxxxxx
> > Hi,
> >
> > I have built some wizards to create some UML model elements. Create a
> > component, assign a name to it, add a state machine, region, apply some
> > stereotype and so on. I am curently implementing all this using statements
> > like:
> >
> > component.setName("name");
> > ..
> >
> > And, of course, receive notifications to all listeners for each single
> > change.
> >
> > I wonder:
> >
> > - Should I instead use EMF commands to manipulate the model? Would I then
> > get Undo for free?
> > - Using these commands, and maybe some composite commands, would I just
> > receive one notification for the model update instead of one for each
> > small change?
> > - Is there any source to find more about commands specifically for UML2?
> > What about the class org.eclipse.uml2.common.edit.command.ChangeCommand -
> > shoudl I use it?
> > - Are commands also the answer to lock the model, so that consistency of
> > the operations can be ensured?
> >
> > I have read about commands in the EMF book, but struggled quite a bit in
> > using them for UML2.
> >
> > So, any hints to examples or documentation are very welcome!
> >
> > Thanks,
> > Fredrik.