/**
* Returns all file names referenced by SegmentInfo. The returned collection is recomputed on each
* invocation.
*/
public Collection<String> files(boolean includeSegmentsFile) throws IOException {
HashSet<String> files = new HashSet<>();
if (includeSegmentsFile) {
final String segmentFileName = getSegmentsFileName();
if (segmentFileName != null) {
files.add(segmentFileName);
}
}
final int size = size();
for (int i = 0; i < size; i++) {
final SegmentCommitInfo info = info(i);
files.addAll(info.files());
}
return files;
}
