[news.eclipse.tools.emf] Re: Use of Copy, Paste Command

["Balaji" <balajik@xxxxxxxxxx>]

Frank,

 

In a wrapper object for the copy which you put on the
clipboard?). What if the same thing is done using a copy and add command instead
of via the clipboard?

 

Yes. I was hoping to subclass the copy helper and add a variable to store the container of the source object. I don't want to store the container information of my objects in my model. Is there any other way to solve this problem?

 

I can't understand your second sentence. "What if the same thing is done using a copy and add command instead of via the clipboard" - Can you please elaborate on that.

 

Thanks

Balaji

"Frank Budinsky" <frankb@xxxxxxxxxx> wrote in message news:3F54DA28.616C71F1@xxxxxxxxxx...

> Balaji,
> 
> It 
sounds kind of kludgy to enforce this kind of restriction by passing 
some
> information from a copy command to a paste command (where would you 
store the
> original's eContainer? In a wrapper object for the copy which 
you put on the
> clipboard?). What if the same thing is done using a copy 
and add command instead
> of via the clipboard?
> 
> I think 
that ideally the model should be designed in such a way that the copied
> 
model object itself has all the necessary state information (maybe it's 
a
> specific subclass) that controls its suitability for adding at one 
place or
> another.
> 
> Frank.
> 
> 
> 
Balaji wrote:
> 
> > All,
> > I use my own copy and 
paste command to copy / paste objects using EMF
> > commands. I had to 
validate the owner on which the object is pasted.
> > for e.g. A 
contains a list of B objects.
> > If B's parent is a (instance of A), 
then B can be pasted only to a.
> >
> > To accomplish this, I 
need to know the eContainer of B. But the
> > PasteFromClipboardCommand 
does not provide me with the eContainer of the
> > object 
copied.
> >
> > command.append
> >
> > (new 
CommandWrapper()
> >
> > {
> >
> > protected 
Command createCommand()
> >
> > {
> >
> > // 
Command copyCommand = CopyCommand.create(domain, domain.getClipboard());
> 
>
> > CompoundCommand compoundCommand = new 
CompoundCommand();
> >
> > Collection objectsToBePasted = 
copyCommand.getResult();
> >
> > ...
> >
> > 
}
> >
> > The objectsToBePasted has information regarding the 
object but not the
> > container. What is the recommended approach in 
this case. Should I store the
> > eContainer of the owner when it is 
copied and use it when it is pasted ?.
> >
> > Thanks
> 
>
> > Balaji
>