}
Blob oldBlob = loadBlob(container, key);
checkState(oldBlob != null, "blob " + key + " is not present although it was in the list of "
+ container);
checkState(oldBlob.getMetadata() != null, "blob " + container + "/" + key + " has no metadata");
MutableBlobMetadata md = BlobStoreUtils.copy(oldBlob.getMetadata());
String directoryName = ifDirectoryReturnName.execute(md);
if (directoryName != null) {
md.setName(directoryName);
md.setType(StorageType.RELATIVE_PATH);
}
return md;
}
}));
String marker = null;
if (options != null) {
if (options.getMarker() != null) {
final String finalMarker = options.getMarker();
StorageMetadata lastMarkerMetadata = find(contents, new Predicate<StorageMetadata>() {
public boolean apply(StorageMetadata metadata) {
return metadata.getName().compareTo(finalMarker) > 0;
}
});
contents = contents.tailSet(lastMarkerMetadata);
}
final String prefix = options.getDir();
if (prefix != null) {
contents = newTreeSet(filter(contents, new Predicate<StorageMetadata>() {
public boolean apply(StorageMetadata o) {
return o != null && o.getName().startsWith(prefix) && !o.getName().equals(prefix);
}
}));
}
int maxResults = options.getMaxResults() != null ? options.getMaxResults() : 1000;
if (!contents.isEmpty()) {
StorageMetadata lastElement = contents.last();
contents = newTreeSet(Iterables.limit(contents, maxResults));
if (!contents.contains(lastElement)) {
// Partial listing
marker = contents.last().getName();
}
}
if (!options.isRecursive()) {
String delimiter = storageStrategy.getSeparator();
SortedSet<String> commonPrefixes = newTreeSet(
transform(contents, new CommonPrefixes(prefix, delimiter)));
commonPrefixes.remove(CommonPrefixes.NO_PREFIX);
contents = newTreeSet(filter(contents, new DelimiterFilter(prefix, delimiter)));
for (String o : commonPrefixes) {
MutableStorageMetadata md = new MutableStorageMetadataImpl();
md.setType(StorageType.RELATIVE_PATH);
md.setName(o);
contents.add(md);
}
}
// trim metadata, if the response isn't supposed to be detailed.
if (!options.isDetailed()) {
for (StorageMetadata md : contents) {
md.getUserMetadata().clear();
}
}
}
return Futures.<PageSet<? extends StorageMetadata>> immediateFuture(new PageSetImpl<StorageMetadata>(contents,