/**
* Finds all files in folder and in it's sub-tree of specified depth.
*
* @param file Starting folder
* @param maxDepth Depth of the tree. If 1 - just look in the folder, no sub-folders.
* @param filter file filter.
* @return List of found files.
*/
public static List<VisorLogFile> fileTree(File file, int maxDepth, @Nullable FileFilter filter) {
if (file.isDirectory()) {
File[] files = (filter == null) ? file.listFiles() : file.listFiles(filter);
if (files == null) return Collections.emptyList();
List<VisorLogFile> res = new ArrayList<>(files.length);
for (File f : files) {
if (f.isFile() && f.length() > 0) res.add(new VisorLogFile(f));
else if (maxDepth > 1) res.addAll(fileTree(f, maxDepth - 1, filter));
}
return res;
}
return F.asList(new VisorLogFile(file));
}
