/**
* list subfiles
*
* @param hdfsPath !null path probably exists
* @return !null list of enclused file names - emptu if file of not exists
*/
@Override
public String[] ls(final String hdfsPath) {
if (isRunningAsUser()) {
return super.ls(hdfsPath);
}
final FileSystem fs = getDFS();
try {
FileStatus[] statuses = fs.listStatus(new Path(hdfsPath));
if (statuses == null) return new String[0];
List<String> holder = new ArrayList<String>();
for (int i = 0; i < statuses.length; i++) {
FileStatus statuse = statuses[i];
String s = statuse.getPath().getName();
holder.add(s);
}
String[] ret = new String[holder.size()];
holder.toArray(ret);
return ret;
} catch (IOException e) {
throw new RuntimeException(e);
}
}
static FsPermission checkPermission(FileSystem fs, String path, FsPermission expected)
throws IOException {
FileStatus s = fs.getFileStatus(new Path(path));
LOG.info(
s.getPath()
+ ": "
+ s.isDirectory()
+ " "
+ s.getPermission()
+ ":"
+ s.getOwner()
+ ":"
+ s.getGroup());
if (expected != null) {
assertEquals(expected, s.getPermission());
assertEquals(expected.toShort(), s.getPermission().toShort());
}
return s.getPermission();
}