We have a tool that does the same thing. Here's the code that does that part:

<pre>
public int getLastModifiedYear(IFile file, IProgressMonitor monitor)
throws CoreException {
IShareable shareable = Adapters.getAdapter(file, IShareable.class);
SubMonitor progress = SubMonitor.convert(monitor, 110);
try {
if (!shareable.shouldBeIgnored(progress.newChild(10))) {
int state = shareable.getState(progress.newChild(50));
int mask = IShareable.SHARED | IShareable.REMOTE;
if ((state &amp; mask) == mask) {
IShare share = shareable.getShare(progress.newChild(25));
ITeamRepository teamRepository = TeamPlatform.getTeamRepositoryService().getTeamRepository(
share.getSharingDescriptor().getRepositoryUri());
IVersionableHandle remote = shareable.getRemote(progress.newChild(25));
if (remote != null) {
Map&lt;StateId&lt;IFileItem&gt;, IFileItem&gt; map = itemMap.get(teamRepository);
if (map != null) {
IFileItem fileItem = map.get(new StateId&lt;IFileItem&gt;(remote));
if (fileItem != null) {
return fileItem.getFileTimestamp().getYear() + 1900;
}
}
// Return a 0 to indicate that this file has not changed since the desired snapshot
return 0;
}
// How can something be shared without a remote?
System.out.println(file.getFullPath()
+ &quot; is shared but has no remote cached&quot;);
}
}
} catch (FileSystemException e) {
throw new CoreException(FileSystemStatusUtil.getStatusFor(e));
}
// By default, return a -1 so the current year will be used in the copyright
return -1;
}
</pre>