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

1 /*
2  * Copyright (C) 2018 The Guava Authors
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
5  * in compliance with the License. You may obtain a copy of the License at
6  *
7  * http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software distributed under the License
10  * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
11  * or implied. See the License for the specific language governing permissions and limitations under
12  * the License.
13  */
14 
15 package com.google.common.collect;
16 
17 import com.google.common.annotations.GwtCompatible;
18 import java.util.Set;
19 import javax.annotation.CheckForNull;
20 
21 /**
22  * ImmutableSet implementation backed by a JDK HashSet, used to defend against apparent hash
23  * flooding. This implementation is never used on the GWT client side, but it must be present there
24  * for serialization to work.
25  *
26  * @author Louis Wasserman
27  */
28 @GwtCompatible(serializable = true)
29 @ElementTypesAreNonnullByDefault
30 final class JdkBackedImmutableSet<E> extends IndexedImmutableSet<E> {
31   private final Set<?> delegate;
32   private final ImmutableList<E> delegateList;
33 
34   JdkBackedImmutableSet(Set<?> delegate, ImmutableList<E> delegateList) {
35     this.delegate = delegate;
36     this.delegateList = delegateList;
37   }
38 
39   @Override
40   E get(int index) {
41     return delegateList.get(index);
42   }
43 
44   @Override
45   public boolean contains(@CheckForNull Object object) {
46     return delegate.contains(object);
47   }
48 
49   @Override
50   boolean isPartialView() {
51     return false;
52   }
53 
54   @Override
55   public int size() {
56     return delegateList.size();
57   }
58 }