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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.Comparator;
import java.util.Map;
import java.util.Set;
import java.util.SortedSet;
import javax.annotation.Nullable;
/**
* A {@code SetMultimap} whose set of values for a given key are kept sorted;
* that is, they comprise a {@link SortedSet}. It cannot hold duplicate
* key-value pairs; adding a key-value pair that's already in the multimap has
* no effect. This interface does not specify the ordering of the multimap's
* keys. See the {@link Multimap} documentation for information common to all
* multimaps.
*
* The {@link #get}, {@link #removeAll}, and {@link #replaceValues} methods
* each return a {@link SortedSet} of values, while {@link Multimap#entries()}
* returns a {@link Set} of map entries. Though the method signature doesn't say
* so explicitly, the map returned by {@link #asMap} has {@code SortedSet}
* values.
*
*
See the Guava User Guide article on
* {@code Multimap}.
*
* @author Jared Levy
* @since 2.0
*/
@GwtCompatible
public interface SortedSetMultimap extends SetMultimap {
// Following Javadoc copied from Multimap.
/**
* Returns a collection view of all values associated with a key. If no
* mappings in the multimap have the provided key, an empty collection is
* returned.
*
* Changes to the returned collection will update the underlying multimap,
* and vice versa.
*
*
Because a {@code SortedSetMultimap} has unique sorted values for a given
* key, this method returns a {@link SortedSet}, instead of the
* {@link java.util.Collection} specified in the {@link Multimap} interface.
*/
@Override
SortedSet get(@Nullable K key);
/**
* Removes all values associated with a given key.
*
* Because a {@code SortedSetMultimap} has unique sorted values for a given
* key, this method returns a {@link SortedSet}, instead of the
* {@link java.util.Collection} specified in the {@link Multimap} interface.
*/
@CanIgnoreReturnValue
@Override
SortedSet removeAll(@Nullable Object key);
/**
* Stores a collection of values with the same key, replacing any existing
* values for that key.
*
* Because a {@code SortedSetMultimap} has unique sorted values for a given
* key, this method returns a {@link SortedSet}, instead of the
* {@link java.util.Collection} specified in the {@link Multimap} interface.
*
*
Any duplicates in {@code values} will be stored in the multimap once.
*/
@CanIgnoreReturnValue
@Override
SortedSet replaceValues(K key, Iterable values);
/**
* Returns a map view that associates each key with the corresponding values
* in the multimap. Changes to the returned map, such as element removal, will
* update the underlying multimap. The map does not support {@code setValue()}
* on its entries, {@code put}, or {@code putAll}.
*
* When passed a key that is present in the map, {@code
* asMap().get(Object)} has the same behavior as {@link #get}, returning a
* live collection. When passed a key that is not present, however, {@code
* asMap().get(Object)} returns {@code null} instead of an empty collection.
*
*
Note: The returned map's values are guaranteed to be of type
* {@link SortedSet}. To obtain this map with the more specific generic type
* {@code Map>}, call
* {@link Multimaps#asMap(SortedSetMultimap)} instead.
*/
@Override
Map> asMap();
/**
* Returns the comparator that orders the multimap values, with {@code null}
* indicating that natural ordering is used.
*/
Comparator valueComparator();
}