@Override
public ImmutableSortedMap<K, V> descendingMap() {
// TODO(kevinb): the descendingMap is never actually cached at all. Either it should be or the
// code below simplified.
ImmutableSortedMap<K, V> result = descendingMap;
if (result == null) {
if (isEmpty()) {
return result = emptyMap(Ordering.from(comparator()).reverse());
} else {
return result =
new ImmutableSortedMap<K, V>(
(RegularImmutableSortedSet<K>) keySet.descendingSet(), valueList.reverse(), this);
}
}
return result;
}
@Override
public ImmutableSortedSet<K> descendingKeySet() {
return keySet.descendingSet();
}
@Override
ImmutableSortedMap<K, V> createDescendingMap() {
return new RegularImmutableSortedMap<K, V>(
(RegularImmutableSortedSet<K>) keySet.descendingSet(), valueList.reverse(), this);
}
