FileSystem fsHar = new HarFileSystem(destFs);
String harURIPath = harPath.toUri().getPath();
Path qualifiedPath = new Path("har://", harURIPath +
Path.SEPARATOR + harPath.getParent().toUri().getPath());
fsHar.initialize(qualifiedPath.toUri(), conf);
FileStatus[] filesInHar = fsHar.listStatus(qualifiedPath);
if (filesInHar.length == 0) {
return 0;
}
int numUseless = 0;
for (FileStatus one: filesInHar) {