Coverage Summary for Class: AllEqualOrdering (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.GwtCompatible;
20 import java.io.Serializable;
21 import java.util.List;
22 import org.checkerframework.checker.nullness.qual.Nullable;
23 
24 /**
25  * An ordering that treats all references as equals, even nulls.
26  *
27  * @author Emily Soldal
28  */
29 @GwtCompatible(serializable = true)
30 final class AllEqualOrdering extends Ordering<Object> implements Serializable {
31   static final AllEqualOrdering INSTANCE = new AllEqualOrdering();
32 
33   @Override
34   public int compare(@Nullable Object left, @Nullable Object right) {
35     return 0;
36   }
37 
38   @Override
39   public <E> List<E> sortedCopy(Iterable<E> iterable) {
40     return Lists.newArrayList(iterable);
41   }
42 
43   @Override
44   public <E> ImmutableList<E> immutableSortedCopy(Iterable<E> iterable) {
45     return ImmutableList.copyOf(iterable);
46   }
47 
48   @SuppressWarnings("unchecked")
49   @Override
50   public <S> Ordering<S> reverse() {
51     return (Ordering<S>) this;
52   }
53 
54   private Object readResolve() {
55     return INSTANCE;
56   }
57 
58   @Override
59   public String toString() {
60     return "Ordering.allEqual()";
61   }
62 
63   private static final long serialVersionUID = 0;
64 }