@Override
public Collection<Attribute> attributes(AttributeFilter filter) {
Collection<Attribute> filtered = new ArrayList<Attribute>(attributes().size() / 2);
for (Attribute attr : attributes()) {
if (filter.accepts(attr)) {
filtered.add(attr);
}
}
return filtered;
}
private static Map<String, Collection<FileObject>> createReversedMap(
Map<FileObject, Collection<String>> file2elements) {
Map<String, Collection<FileObject>> map = new HashMap<String, Collection<FileObject>>();
for (FileObject file : file2elements.keySet()) {
for (String element : file2elements.get(file)) {
Collection<FileObject> files = map.get(element);
if (files == null) {
files = new HashSet<FileObject>();
}
files.add(file);
map.put(element, files);
}
}
return map;
}