Re: Retrieving Java Packages

Hello, Joe (et all),

Joe Warzecha wrote:
> I defined a project nature that extends the java project nature.
> At some point, I want to retrieve the java packages that the user
> has created in the project. Is there an api call to do this?
> 
> I was able to get the packages this way:
> 
> * Retrieve JavaSourcesComponent from current Project:
>     JavaSourcesComponent [] jscs = 
>          PackagesDataObject.getDefault (curProject).getJSCs ();
> 
> * Retrieve ClassPath Roots from JavaSourcesComponent:
>     DataFolder [] dfs = jscs [i].getCPRoots ();
> 
> * Determine packages from ClassPath Roots:
>     DataObject [] dataObjs = dfs [i].getChildren ();
>     /* Go through DataObjects looking for DataFolders */
> 
> Retrieving the packages seems like something that module
> writers might want to do, so IMO it might be nice if the
> java module supplied a method to retrieve them.
> 
It's a very late reply :-) but during recent refactoring of Java module 
implementation, two classes emerged:
* JavaResource, which describes a resource as it would be seen by a 
classloader with one file visible and possibly some files hidden by the 
visible one
* JavaPackage, which contains resources, reacts to file changes by 
refreshing etc.

The root/default package can be built around a FileSet or a ClassPath 
instance.

I would consider this class as a good utility for Java module 
APIs/support if the general assessment is that working with packages 
respecting resource hiding/merging is a usual thing to do for java tools.

-Svata