Coverage Summary for Class: DescendingImmutableSortedSet (com.google.common.collect)

1 /*
2  * Copyright (C) 2012 The Guava Authors
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package com.google.common.collect;
18 
19 import com.google.common.annotations.GwtIncompatible;
20 import org.checkerframework.checker.nullness.qual.Nullable;
21 
22 /**
23  * Skeletal implementation of {@link ImmutableSortedSet#descendingSet()}.
24  *
25  * @author Louis Wasserman
26  */
27 @GwtIncompatible
28 final class DescendingImmutableSortedSet<E> extends ImmutableSortedSet<E> {
29   private final ImmutableSortedSet<E> forward;
30 
31   DescendingImmutableSortedSet(ImmutableSortedSet<E> forward) {
32     super(Ordering.from(forward.comparator()).reverse());
33     this.forward = forward;
34   }
35 
36   @Override
37   public boolean contains(@Nullable Object object) {
38     return forward.contains(object);
39   }
40 
41   @Override
42   public int size() {
43     return forward.size();
44   }
45 
46   @Override
47   public UnmodifiableIterator<E> iterator() {
48     return forward.descendingIterator();
49   }
50 
51   @Override
52   ImmutableSortedSet<E> headSetImpl(E toElement, boolean inclusive) {
53     return forward.tailSet(toElement, inclusive).descendingSet();
54   }
55 
56   @Override
57   ImmutableSortedSet<E> subSetImpl(
58       E fromElement, boolean fromInclusive, E toElement, boolean toInclusive) {
59     return forward.subSet(toElement, toInclusive, fromElement, fromInclusive).descendingSet();
60   }
61 
62   @Override
63   ImmutableSortedSet<E> tailSetImpl(E fromElement, boolean inclusive) {
64     return forward.headSet(fromElement, inclusive).descendingSet();
65   }
66 
67   @Override
68   @GwtIncompatible("NavigableSet")
69   public ImmutableSortedSet<E> descendingSet() {
70     return forward;
71   }
72 
73   @Override
74   @GwtIncompatible("NavigableSet")
75   public UnmodifiableIterator<E> descendingIterator() {
76     return forward.iterator();
77   }
78 
79   @Override
80   @GwtIncompatible("NavigableSet")
81   ImmutableSortedSet<E> createDescendingSet() {
82     throw new AssertionError("should never be called");
83   }
84 
85   @Override
86   public E lower(E element) {
87     return forward.higher(element);
88   }
89 
90   @Override
91   public E floor(E element) {
92     return forward.ceiling(element);
93   }
94 
95   @Override
96   public E ceiling(E element) {
97     return forward.floor(element);
98   }
99 
100   @Override
101   public E higher(E element) {
102     return forward.lower(element);
103   }
104 
105   @Override
106   int indexOf(@Nullable Object target) {
107     int index = forward.indexOf(target);
108     if (index == -1) {
109       return index;
110     } else {
111       return size() - 1 - index;
112     }
113   }
114 
115   @Override
116   boolean isPartialView() {
117     return forward.isPartialView();
118   }
119 }