| /* |
| * Copyright (C) 2007 The Guava Authors |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.google.common.collect; |
| |
| import com.google.common.annotations.GwtCompatible; |
| |
| import java.util.Collection; |
| import java.util.List; |
| import java.util.Map; |
| |
| import javax.annotation.Nullable; |
| |
| /** |
| * Basic implementation of the {@link ListMultimap} interface. It's a wrapper |
| * around {@link AbstractMapBasedMultimap} that converts the returned collections into |
| * {@code Lists}. The {@link #createCollection} method must return a {@code |
| * List}. |
| * |
| * @author Jared Levy |
| * @since 2.0 (imported from Google Collections Library) |
| */ |
| @GwtCompatible |
| abstract class AbstractListMultimap<K, V> |
| extends AbstractMapBasedMultimap<K, V> implements ListMultimap<K, V> { |
| /** |
| * Creates a new multimap that uses the provided map. |
| * |
| * @param map place to store the mapping from each key to its corresponding |
| * values |
| */ |
| protected AbstractListMultimap(Map<K, Collection<V>> map) { |
| super(map); |
| } |
| |
| @Override abstract List<V> createCollection(); |
| |
| @Override |
| List<V> createUnmodifiableEmptyCollection() { |
| return ImmutableList.of(); |
| } |
| |
| // Following Javadoc copied from ListMultimap. |
| |
| /** |
| * {@inheritDoc} |
| * |
| * <p>Because the values for a given key may have duplicates and follow the |
| * insertion ordering, this method returns a {@link List}, instead of the |
| * {@link Collection} specified in the {@link Multimap} interface. |
| */ |
| @Override public List<V> get(@Nullable K key) { |
| return (List<V>) super.get(key); |
| } |
| |
| /** |
| * {@inheritDoc} |
| * |
| * <p>Because the values for a given key may have duplicates and follow the |
| * insertion ordering, this method returns a {@link List}, instead of the |
| * {@link Collection} specified in the {@link Multimap} interface. |
| */ |
| @Override public List<V> removeAll(@Nullable Object key) { |
| return (List<V>) super.removeAll(key); |
| } |
| |
| /** |
| * {@inheritDoc} |
| * |
| * <p>Because the values for a given key may have duplicates and follow the |
| * insertion ordering, this method returns a {@link List}, instead of the |
| * {@link Collection} specified in the {@link Multimap} interface. |
| */ |
| @Override public List<V> replaceValues( |
| @Nullable K key, Iterable<? extends V> values) { |
| return (List<V>) super.replaceValues(key, values); |
| } |
| |
| /** |
| * Stores a key-value pair in the multimap. |
| * |
| * @param key key to store in the multimap |
| * @param value value to store in the multimap |
| * @return {@code true} always |
| */ |
| @Override public boolean put(@Nullable K key, @Nullable V value) { |
| return super.put(key, value); |
| } |
| |
| /** |
| * {@inheritDoc} |
| * |
| * <p>Though the method signature doesn't say so explicitly, the returned map |
| * has {@link List} values. |
| */ |
| @Override public Map<K, Collection<V>> asMap() { |
| return super.asMap(); |
| } |
| |
| /** |
| * Compares the specified object to this multimap for equality. |
| * |
| * <p>Two {@code ListMultimap} instances are equal if, for each key, they |
| * contain the same values in the same order. If the value orderings disagree, |
| * the multimaps will not be considered equal. |
| */ |
| @Override public boolean equals(@Nullable Object object) { |
| return super.equals(object); |
| } |
| |
| private static final long serialVersionUID = 6588350623831699109L; |
| } |