| /* |
| * Copyright (C) 2012 The Guava Authors |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.google.common.collect; |
| |
| import com.google.common.annotations.GwtIncompatible; |
| import org.checkerframework.checker.nullness.compatqual.NullableDecl; |
| |
| /** |
| * Skeletal implementation of {@link ImmutableSortedSet#descendingSet()}. |
| * |
| * @author Louis Wasserman |
| */ |
| @GwtIncompatible |
| final class DescendingImmutableSortedSet<E> extends ImmutableSortedSet<E> { |
| private final ImmutableSortedSet<E> forward; |
| |
| DescendingImmutableSortedSet(ImmutableSortedSet<E> forward) { |
| super(Ordering.from(forward.comparator()).reverse()); |
| this.forward = forward; |
| } |
| |
| @Override |
| public boolean contains(@NullableDecl Object object) { |
| return forward.contains(object); |
| } |
| |
| @Override |
| public int size() { |
| return forward.size(); |
| } |
| |
| @Override |
| public UnmodifiableIterator<E> iterator() { |
| return forward.descendingIterator(); |
| } |
| |
| @Override |
| ImmutableSortedSet<E> headSetImpl(E toElement, boolean inclusive) { |
| return forward.tailSet(toElement, inclusive).descendingSet(); |
| } |
| |
| @Override |
| ImmutableSortedSet<E> subSetImpl( |
| E fromElement, boolean fromInclusive, E toElement, boolean toInclusive) { |
| return forward.subSet(toElement, toInclusive, fromElement, fromInclusive).descendingSet(); |
| } |
| |
| @Override |
| ImmutableSortedSet<E> tailSetImpl(E fromElement, boolean inclusive) { |
| return forward.headSet(fromElement, inclusive).descendingSet(); |
| } |
| |
| @Override |
| @GwtIncompatible("NavigableSet") |
| public ImmutableSortedSet<E> descendingSet() { |
| return forward; |
| } |
| |
| @Override |
| @GwtIncompatible("NavigableSet") |
| public UnmodifiableIterator<E> descendingIterator() { |
| return forward.iterator(); |
| } |
| |
| @Override |
| @GwtIncompatible("NavigableSet") |
| ImmutableSortedSet<E> createDescendingSet() { |
| throw new AssertionError("should never be called"); |
| } |
| |
| @Override |
| public E lower(E element) { |
| return forward.higher(element); |
| } |
| |
| @Override |
| public E floor(E element) { |
| return forward.ceiling(element); |
| } |
| |
| @Override |
| public E ceiling(E element) { |
| return forward.floor(element); |
| } |
| |
| @Override |
| public E higher(E element) { |
| return forward.lower(element); |
| } |
| |
| @Override |
| int indexOf(@NullableDecl Object target) { |
| int index = forward.indexOf(target); |
| if (index == -1) { |
| return index; |
| } else { |
| return size() - 1 - index; |
| } |
| } |
| |
| @Override |
| boolean isPartialView() { |
| return forward.isPartialView(); |
| } |
| } |