| // Copyright (c) 2020, the R8 project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| package com.android.tools.r8.utils.collections; |
| |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.function.BiConsumer; |
| |
| /** |
| * Interface that accommodates many-to-one mappings. |
| * |
| * <p>This interface inherits from {@link BidirectionalManyToManyMap} to allow implementing |
| * many-to-many mappings using many-to-one mappings. |
| */ |
| public interface BidirectionalManyToOneMap<K, V> extends BidirectionalManyToManyMap<K, V> { |
| |
| void forEachManyToOneMapping(BiConsumer<? super Set<K>, V> consumer); |
| |
| V get(Object key); |
| |
| V getOrDefault(Object key, V defaultValue); |
| |
| Map<K, V> getForwardMap(); |
| |
| Set<K> keySet(); |
| |
| Set<V> values(); |
| } |