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