Re: finding all Java classes in a project

Dave Weatherford wrote:
> 
> I tried JavaProject.getSources(), but that just returned two ProjectMembers,
> both empty, named Collections/java-src.jsrc and Collections/src.jsrc .
> 
[not checked] I think the javadoc says that this method returns project 
representants for the sources, not the sources (folders) themselves.

> I saw that Svata recommended using JavaProject.getClassesDescriptor(), 
> but I
> have not been successful; it always returns null for me.
> 
This is surely a bug, if applied on the CU's build target.

JavaProject.getClassesDescriptor(someCU.getBuildTarget()) ought to work. 
Please also see #34364 for convenience methods request.

>     Project project = debugger.getProject();
>     JavaProject jproj = JavaProject.getJavaProject(project);
> 
>     Collection cus = jproj.getCompilationUnits();
> 
>     Iterator cuit = cus.iterator();
>     while ( cuit.hasNext() ) {
>         CompilationUnit cu = (CompilationUnit)cuit.next();

At this point, you may retrieve getBuildTarget() and query the target's 
output FileSet (which saves you from walking the java.io.File subtrees 
manually).
>         File file = new File(fileName);
>         ArrayList list = new ArrayList();
>         walk(file, list);
>         String baseDir = file.getPath();
>         int prefixLen = baseDir.length() + 1;
>         Iterator lit = list.iterator();
>         while ( lit.hasNext() ) {
>             String path = ((File)lit.next()).getPath();
>             if ( path.endsWith(".class") ) {
>             int len = path.length();
>             String className =
>                 path.substring(prefixLen, len - suffixLen);
>             className = className.replace(File.separatorChar, '.');

If you used JavaDescriptor interface, you could also obtain the 
ClassPath object, which is capable to convert filename to a "resource 
name" - strip the classpath root prefix from the file (and some other 
things, too).

Folks, this is the second request to obtain class _names_ rather than 
files; do you think it deserves some helper to be implemented in APIs ?

-Svata