[news.eclipse.platform] Re: Extending Folder resource

[Ed Merks <merks@xxxxxxxxxx>]

Rahul,

I imagine this could be done via a registered IAdapterFactory; an IResource is an IAdaptable.  You could exploit IResource.getPersistenceProperty/setPersistenProperty to help implement your adapter.


Rahul Kamdar wrote:

Hi Eric and Ed!

Thanks a lot for the prompt responses. From what I did read around, I felt 
you cannot pretty much extend the internal classes but I wanted to reconfirm 
from someone.. So thanks for that... Eric I am looking at basically holding 
a custom object/handle associated with each folder falling under a certain 
group of special folders I have defined under a project.. So for this, one 
of the approach was to make my custom class extend the folder and then add 
some of my own behaviorial methods to it.. This way I would be able to keep 
it all under a single object, my stuff + folder representation..

Am not sure how I would be able to do something similar via extension 
points... Any direction there would be great! But thanks a lot for the 
replies anyway...

Thanks,

Rahul

"Eric Rizzo" <eclipse-news@xxxxxxxxxxxx> wrote in message 
news:fpnpe1$hj5$3@xxxxxxxxxxxxxxxxx...
  

Rahul Kamdar wrote:
    

Hi,

I want to extend the org.eclipse.core.internal.resources.Folder to create 
my own type of a Folder and add to the behavior and some of my own 
manipulations. When I try to directly extend it, the constructor returns 
a ClassCastException. Even if I try to cast a folder object to my own 
custom folder, I get the same ClassCastException.

We cannot extend classes defined under 
org.eclipse.core.internal.resources, is it? Would you suggest on how to 
try to the same! :-)
      

As Ed already said, its futile to try to extend internal classes.
What behavior, specifially, are you wanting to add? Many things can be 
done via extension points.

Eric