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1   /*
2    * Copyright (C) 2013 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.testing.google;
18  
19  import com.google.common.annotations.GwtCompatible;
20  import com.google.common.collect.Multimap;
21  import com.google.common.collect.testing.Helpers;
22  import com.google.common.collect.testing.features.Feature;
23  import com.google.common.collect.testing.features.TesterAnnotation;
24  import java.lang.annotation.Inherited;
25  import java.lang.annotation.Retention;
26  import java.lang.annotation.RetentionPolicy;
27  import java.util.Set;
28  
29  /**
30   * Optional features of classes derived from {@code Multimap}.
31   *
32   * @author Louis Wasserman
33   */
34  // Enum values use constructors with generic varargs.
35  @SuppressWarnings("unchecked")
36  @GwtCompatible
37  public enum MultimapFeature implements Feature<Multimap> {
38    VALUE_COLLECTIONS_SUPPORT_ITERATOR_REMOVE;
39  
40    private final Set<Feature<? super Multimap>> implied;
41  
42    MultimapFeature(Feature<? super Multimap>... implied) {
43      this.implied = Helpers.copyToSet(implied);
44    }
45  
46    @Override
47    public Set<Feature<? super Multimap>> getImpliedFeatures() {
48      return implied;
49    }
50  
51    @Retention(RetentionPolicy.RUNTIME)
52    @Inherited
53    @TesterAnnotation
54    public @interface Require {
55      public abstract MultimapFeature[] value() default {};
56  
57      public abstract MultimapFeature[] absent() default {};
58    }
59  }