public static FileSelection create(
final DrillFileSystem fs, final String parent, final String path) throws IOException {
Stopwatch timer = Stopwatch.createStarted();
final Path combined = new Path(parent, removeLeadingSlash(path));
final FileStatus[] statuses = fs.globStatus(combined);
if (statuses == null) {
return null;
}
final FileSelection fileSel =
create(Lists.newArrayList(statuses), null, combined.toUri().toString());
logger.debug("FileSelection.create() took {} ms ", timer.elapsed(TimeUnit.MILLISECONDS));
return fileSel;
}
public List<FileStatus> getStatuses(final DrillFileSystem fs) throws IOException {
Stopwatch timer = Stopwatch.createStarted();
if (statuses == null) {
final List<FileStatus> newStatuses = Lists.newArrayList();
for (final String pathStr : files) {
newStatuses.add(fs.getFileStatus(new Path(pathStr)));
}
statuses = newStatuses;
}
logger.debug(
"FileSelection.getStatuses() took {} ms, numFiles: {}",
timer.elapsed(TimeUnit.MILLISECONDS),
statuses == null ? 0 : statuses.size());
return statuses;
}
public FileSelection minusDirectories(DrillFileSystem fs) throws IOException {
if (isExpanded()) {
return this;
}
Stopwatch timer = Stopwatch.createStarted();
final List<FileStatus> statuses = getStatuses(fs);
final int total = statuses.size();
final Path[] paths = new Path[total];
for (int i = 0; i < total; i++) {
paths[i] = statuses.get(i).getPath();
}
final List<FileStatus> allStats = fs.list(true, paths);
final List<FileStatus> nonDirectories =
Lists.newArrayList(
Iterables.filter(
allStats,
new Predicate<FileStatus>() {
@Override
public boolean apply(@Nullable FileStatus status) {
return !status.isDirectory();
}
}));
final FileSelection fileSel = create(nonDirectories, null, selectionRoot);
logger.debug(
"FileSelection.minusDirectories() took {} ms, numFiles: {}",
timer.elapsed(TimeUnit.MILLISECONDS),
total);
// fileSel will be null if we query an empty folder
if (fileSel != null) {
fileSel.setExpanded();
}
return fileSel;
}