10888a09821a98ac0680fad765217302858e70fa4Paul Duffin/*
20888a09821a98ac0680fad765217302858e70fa4Paul Duffin * Copyright (C) 2013 The Guava Authors
30888a09821a98ac0680fad765217302858e70fa4Paul Duffin *
40888a09821a98ac0680fad765217302858e70fa4Paul Duffin * Licensed under the Apache License, Version 2.0 (the "License");
50888a09821a98ac0680fad765217302858e70fa4Paul Duffin * you may not use this file except in compliance with the License.
60888a09821a98ac0680fad765217302858e70fa4Paul Duffin * You may obtain a copy of the License at
70888a09821a98ac0680fad765217302858e70fa4Paul Duffin *
80888a09821a98ac0680fad765217302858e70fa4Paul Duffin * http://www.apache.org/licenses/LICENSE-2.0
90888a09821a98ac0680fad765217302858e70fa4Paul Duffin *
100888a09821a98ac0680fad765217302858e70fa4Paul Duffin * Unless required by applicable law or agreed to in writing, software
110888a09821a98ac0680fad765217302858e70fa4Paul Duffin * distributed under the License is distributed on an "AS IS" BASIS,
120888a09821a98ac0680fad765217302858e70fa4Paul Duffin * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
130888a09821a98ac0680fad765217302858e70fa4Paul Duffin * See the License for the specific language governing permissions and
140888a09821a98ac0680fad765217302858e70fa4Paul Duffin * limitations under the License.
150888a09821a98ac0680fad765217302858e70fa4Paul Duffin */
160888a09821a98ac0680fad765217302858e70fa4Paul Duffin
170888a09821a98ac0680fad765217302858e70fa4Paul Duffinpackage com.google.common.collect.testing.google;
180888a09821a98ac0680fad765217302858e70fa4Paul Duffin
190888a09821a98ac0680fad765217302858e70fa4Paul Duffinimport com.google.common.annotations.GwtCompatible;
200888a09821a98ac0680fad765217302858e70fa4Paul Duffinimport com.google.common.collect.Multiset;
210888a09821a98ac0680fad765217302858e70fa4Paul Duffinimport com.google.common.collect.testing.features.Feature;
220888a09821a98ac0680fad765217302858e70fa4Paul Duffinimport com.google.common.collect.testing.features.TesterAnnotation;
230888a09821a98ac0680fad765217302858e70fa4Paul Duffin
240888a09821a98ac0680fad765217302858e70fa4Paul Duffinimport java.lang.annotation.Inherited;
250888a09821a98ac0680fad765217302858e70fa4Paul Duffinimport java.lang.annotation.Retention;
260888a09821a98ac0680fad765217302858e70fa4Paul Duffinimport java.lang.annotation.RetentionPolicy;
270888a09821a98ac0680fad765217302858e70fa4Paul Duffinimport java.util.Collections;
280888a09821a98ac0680fad765217302858e70fa4Paul Duffinimport java.util.Set;
290888a09821a98ac0680fad765217302858e70fa4Paul Duffin
300888a09821a98ac0680fad765217302858e70fa4Paul Duffin/**
310888a09821a98ac0680fad765217302858e70fa4Paul Duffin * Optional features of classes derived from {@link Multiset}.
320888a09821a98ac0680fad765217302858e70fa4Paul Duffin *
330888a09821a98ac0680fad765217302858e70fa4Paul Duffin * @author Louis Wasserman
340888a09821a98ac0680fad765217302858e70fa4Paul Duffin */
350888a09821a98ac0680fad765217302858e70fa4Paul Duffin@GwtCompatible
360888a09821a98ac0680fad765217302858e70fa4Paul Duffinpublic enum MultisetFeature implements Feature<Multiset> {
370888a09821a98ac0680fad765217302858e70fa4Paul Duffin  /**
380888a09821a98ac0680fad765217302858e70fa4Paul Duffin   * Indicates that elements from {@code Multiset.entrySet()} update to reflect changes in the
390888a09821a98ac0680fad765217302858e70fa4Paul Duffin   * backing multiset.
400888a09821a98ac0680fad765217302858e70fa4Paul Duffin   */
410888a09821a98ac0680fad765217302858e70fa4Paul Duffin  ENTRIES_ARE_VIEWS;
420888a09821a98ac0680fad765217302858e70fa4Paul Duffin
430888a09821a98ac0680fad765217302858e70fa4Paul Duffin  @Override
440888a09821a98ac0680fad765217302858e70fa4Paul Duffin  public Set<Feature<? super Multiset>> getImpliedFeatures() {
450888a09821a98ac0680fad765217302858e70fa4Paul Duffin    return Collections.emptySet();
460888a09821a98ac0680fad765217302858e70fa4Paul Duffin  }
470888a09821a98ac0680fad765217302858e70fa4Paul Duffin
480888a09821a98ac0680fad765217302858e70fa4Paul Duffin  @Retention(RetentionPolicy.RUNTIME)
490888a09821a98ac0680fad765217302858e70fa4Paul Duffin  @Inherited
500888a09821a98ac0680fad765217302858e70fa4Paul Duffin  @TesterAnnotation
510888a09821a98ac0680fad765217302858e70fa4Paul Duffin  public @interface Require {
520888a09821a98ac0680fad765217302858e70fa4Paul Duffin    public abstract MultisetFeature[] value() default {};
530888a09821a98ac0680fad765217302858e70fa4Paul Duffin    public abstract MultisetFeature[] absent() default {};
540888a09821a98ac0680fad765217302858e70fa4Paul Duffin  }
550888a09821a98ac0680fad765217302858e70fa4Paul Duffin}
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