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/*
* 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 com.google.errorprone.annotations.CanIgnoreReturnValue;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import org.checkerframework.checker.nullness.compatqual.NullableDecl;
/**
* A {@code Multimap} that can hold duplicate key-value pairs and that maintains the insertion
* ordering of values for a given key. See the {@link Multimap} documentation for information common
* to all multimaps.
*
* The {@link #get}, {@link #removeAll}, and {@link #replaceValues} methods each return a {@link
* List} of values. Though the method signature doesn't say so explicitly, the map returned by
* {@link #asMap} has {@code List} values.
*
*
See the Guava User Guide article on {@code
* Multimap}.
*
* @author Jared Levy
* @since 2.0
*/
@GwtCompatible
public interface ListMultimap extends Multimap {
/**
* {@inheritDoc}
*
* 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 java.util.Collection} specified in
* the {@link Multimap} interface.
*/
@Override
List get(@NullableDecl K key);
/**
* {@inheritDoc}
*
* 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 java.util.Collection} specified in
* the {@link Multimap} interface.
*/
@CanIgnoreReturnValue
@Override
List removeAll(@NullableDecl Object key);
/**
* {@inheritDoc}
*
* 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 java.util.Collection} specified in
* the {@link Multimap} interface.
*/
@CanIgnoreReturnValue
@Override
List replaceValues(K key, Iterable values);
/**
* {@inheritDoc}
*
* Note: The returned map's values are guaranteed to be of type {@link List}. To obtain
* this map with the more specific generic type {@code Map>}, call {@link
* Multimaps#asMap(ListMultimap)} instead.
*/
@Override
Map> asMap();
/**
* Compares the specified object to this multimap for equality.
*
* 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.
*
*
An empty {@code ListMultimap} is equal to any other empty {@code Multimap}, including an
* empty {@code SetMultimap}.
*/
@Override
boolean equals(@NullableDecl Object obj);
}