[buckminster-dev] Re: Problems getting started with Headless Buckminster

[Eugene Kuleshov <eu@xxxxxxxx>]

Thomas Hallgren wrote:
> Hi Eugene,
> I've seen the concept of adaptable used in many places in Eclipse but 
> I'm not sure I fully understand the semantics of it. In particular, 
> when and how will the adapter factory be utilized?
>
> For instance, how do you make sure the adapter factory comes into play 
> prior to situations like this:
>
> if (sa instanceof IEncodedStreamContentAccessor) {
>     try {
>         encoding= ((IEncodedStreamContentAccessor) sa).getCharset();
>     } catch (Exception e) {
>     }
> }
>
> I see this type of construct in a number of places in Eclipse.
 This is how Adaptable.getAdapter() method is usually implemented. That 
won't help in your case. Though could eliminate direct dependencies at 
the class initialization time (because resource won't implement 
IEncodedStreamContentAccessor interface anymore).

 To make it even more decoupled and allow adapter to be in a different 
plugin then adapable you would need to register factory 
Platform.getAdapterManager().registerAdapters(factory, 
IEncodedStreamContentAccessor.class);

 Then you can use Platform.getAdapterManager().getAdapter(adaptable, 
IEncodedStreamContentAccessor.class)

 You can see that Subclipse is registering adapter factory for a few 
classes in CVSUIPlugin.start

 regards,
 Eugene