Eclipse Community Forums: EMF » EMF Notification: how to not get our own modifications?

Help

Home

Home » Modeling » EMF » EMF Notification: how to not get our own modifications?

Show: Today's Messages :: Show Polls :: Message Navigator

EMF Notification: how to not get our own modifications? [message #965947]

Wed, 31 October 2012 16:31

Victor Noël

Messages: 112
Registered: June 2010

Senior Member

Hi,

I have two pieces of code modifying the same EMF model.

When one modifies it, notifications are sent, to everyone, including the one that modifies it.

Is there any way to detect who did the modification that made the notification happen?

My only need is to be able, when I modify a model, to detect in my listener that I was the one actually modifying the model.

Thank you for any help :)

Report message to a moderator

Re: EMF Notification: how to not get our own modifications? [message #966011 is a reply to message #965947]

Wed, 31 October 2012 17:32

Justin T

Messages: 1
Registered: October 2012

Junior Member

Hi,

You can access to the notifier by using the method "getNotifier()" of the Notification object.

For example:

class Observer extends AdapterImpl
{
	@Override
	public void notifyChanged(Notification notification)
	{
		if(notification.isTouch())
                   return;
                
                if(notification.getNotifier() == ...)
                ...
	}
}

Regards,
Justin

Report message to a moderator

Re: EMF Notification: how to not get our own modifications? [message #966232 is a reply to message #965947]

Wed, 31 October 2012 21:29

Ed Merks

Messages: 33137
Registered: July 2009

Senior Member

Victor,

There's no way to know what/who caused the change. Of course if you did
the modification, you already know you'll get a notification for that...

On 31/10/2012 5:31 PM, Victor Mising name wrote:
> Hi,
>
> I have two pieces of code modifying the same EMF model.
>
> When one modifies it, notifications are sent, to everyone, including
> the one that modifies it.
>
> Is there any way to detect who did the modification that made the
> notification happen?
>
> My only need is to be able, when I modify a model, to detect in my
> listener that I was the one actually modifying the model.
>
> Thank you for any help :)

Ed Merks
Professional Support: https://www.macromodeling.com/

Report message to a moderator

Re: EMF Notification: how to not get our own modifications? [message #966875 is a reply to message #966232]

Thu, 01 November 2012 09:53

Ed Willink

Messages: 7655
Registered: July 2009

Senior Member

Hi

An approach that I've used to break similar selectionChanged loops is to
have a private e.g. selectionChanging normally falsevariable. In the
handler, if the variable is false is it is set true to indicate
processing a selection change and restored in a finally clause. If
already set you know that you're in a nested loop and should probably
just return promptly.

Regards

Ed Willink

On 31/10/2012 21:29, Ed Merks wrote:
> Victor,
>
> There's no way to know what/who caused the change. Of course if you
> did the modification, you already know you'll get a notification for
> that...
>
> On 31/10/2012 5:31 PM, Victor Mising name wrote:
>> Hi,
>>
>> I have two pieces of code modifying the same EMF model.
>>
>> When one modifies it, notifications are sent, to everyone, including
>> the one that modifies it.
>>
>> Is there any way to detect who did the modification that made the
>> notification happen?
>>
>> My only need is to be able, when I modify a model, to detect in my
>> listener that I was the one actually modifying the model.
>>
>> Thank you for any help :)
>

Report message to a moderator