001/*
002 * Copyright (C) 2013 The Guava Authors
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package com.google.common.collect.testing.google;
018
019import static com.google.common.collect.testing.Helpers.copyToSet;
020
021import com.google.common.annotations.GwtCompatible;
022import com.google.common.collect.Multimap;
023import com.google.common.collect.testing.features.Feature;
024import com.google.common.collect.testing.features.TesterAnnotation;
025import java.lang.annotation.Inherited;
026import java.lang.annotation.Retention;
027import java.lang.annotation.RetentionPolicy;
028import java.util.Set;
029
030/**
031 * Optional features of classes derived from {@code Multimap}.
032 *
033 * @author Louis Wasserman
034 */
035@SuppressWarnings("rawtypes") // maybe avoidable if we rework the whole package?
036@GwtCompatible
037public enum MultimapFeature implements Feature<Multimap> {
038  VALUE_COLLECTIONS_SUPPORT_ITERATOR_REMOVE;
039
040  private final Set<Feature<? super Multimap>> implied;
041
042  MultimapFeature(Feature<? super Multimap>... implied) {
043    this.implied = copyToSet(implied);
044  }
045
046  @Override
047  public Set<Feature<? super Multimap>> getImpliedFeatures() {
048    return implied;
049  }
050
051  @Retention(RetentionPolicy.RUNTIME)
052  @Inherited
053  @TesterAnnotation
054  public @interface Require {
055    MultimapFeature[] value() default {};
056
057    MultimapFeature[] absent() default {};
058  }
059}