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.Multiset; 21 import com.google.common.collect.testing.features.Feature; 22 import com.google.common.collect.testing.features.TesterAnnotation; 23 24 import java.lang.annotation.Inherited; 25 import java.lang.annotation.Retention; 26 import java.lang.annotation.RetentionPolicy; 27 import java.util.Collections; 28 import java.util.Set; 29 30 /** 31 * Optional features of classes derived from {@link Multiset}. 32 * 33 * @author Louis Wasserman 34 */ 35 @GwtCompatible 36 public enum MultisetFeature implements Feature<Multiset> { 37 /** 38 * Indicates that elements from {@code Multiset.entrySet()} update to reflect changes in the 39 * backing multiset. 40 */ 41 ENTRIES_ARE_VIEWS; 42 43 @Override getImpliedFeatures()44 public Set<Feature<? super Multiset>> getImpliedFeatures() { 45 return Collections.emptySet(); 46 } 47 48 @Retention(RetentionPolicy.RUNTIME) 49 @Inherited 50 @TesterAnnotation 51 public @interface Require { value()52 public abstract MultisetFeature[] value() default {}; absent()53 public abstract MultisetFeature[] absent() default {}; 54 } 55 } 56