Java
1/*
2* Copyright (C) 2008 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
17package com.google.common.collect.testing.features;18
19import com.google.common.annotations.GwtCompatible;20import com.google.common.collect.testing.Helpers;21import java.lang.annotation.Inherited;22import java.lang.annotation.Retention;23import java.lang.annotation.RetentionPolicy;24import java.util.Set;25
26/**
27* Optional features of classes derived from {@code Set}.
28*
29* @author George van den Driessche
30*/
31@SuppressWarnings("rawtypes") // maybe avoidable if we rework the whole package?32@GwtCompatible
33public enum SetFeature implements Feature<Set> {34GENERAL_PURPOSE(CollectionFeature.GENERAL_PURPOSE);35
36private final Set<Feature<? super Set>> implied;37
38SetFeature(Feature<? super Set>... implied) {39this.implied = Helpers.copyToSet(implied);40}41
42@Override43public Set<Feature<? super Set>> getImpliedFeatures() {44return implied;45}46
47@Retention(RetentionPolicy.RUNTIME)48@Inherited49@TesterAnnotation50public @interface Require {51public abstract SetFeature[] value() default {};52
53public abstract SetFeature[] absent() default {};54}55}
56