| /* |
| * Copyright (C) 2008 The Guava Authors |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.google.common.collect.testing.features; |
| |
| import com.google.common.annotations.GwtCompatible; |
| import com.google.common.collect.testing.Helpers; |
| import java.lang.annotation.Inherited; |
| import java.lang.annotation.Retention; |
| import java.lang.annotation.RetentionPolicy; |
| import java.util.Set; |
| |
| /** |
| * Optional features of classes derived from {@code Set}. |
| * |
| * @author George van den Driessche |
| */ |
| // Enum values use constructors with generic varargs. |
| @SuppressWarnings("unchecked") |
| @GwtCompatible |
| public enum SetFeature implements Feature<Set> { |
| GENERAL_PURPOSE(CollectionFeature.GENERAL_PURPOSE); |
| |
| private final Set<Feature<? super Set>> implied; |
| |
| SetFeature(Feature<? super Set>... implied) { |
| this.implied = Helpers.copyToSet(implied); |
| } |
| |
| @Override |
| public Set<Feature<? super Set>> getImpliedFeatures() { |
| return implied; |
| } |
| |
| @Retention(RetentionPolicy.RUNTIME) |
| @Inherited |
| @TesterAnnotation |
| public @interface Require { |
| public abstract SetFeature[] value() default {}; |
| |
| public abstract SetFeature[] absent() default {}; |
| } |
| } |