com.google.common.collect.SortedSetMultimap Maven / Gradle / Ivy
Show all versions of google-collections Show documentation
/*
* Copyright (C) 2007 Google Inc.
*
* 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.base.Nullable;
import java.util.Collection;
import java.util.Comparator;
import java.util.Map;
import java.util.Set;
import java.util.SortedSet;
/**
* 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.
*
* 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.
*
* @author Jared Levy
*/
public interface SortedSetMultimap extends SetMultimap {
/**
* 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.
*/
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.
*/
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.
*/
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 never supports
* {@code setValue()} on the map entries, {@code put}, or {@code putAll}.
*
* The collections returned by {@code asMap().get(Object)} have the same
* behavior as those returned by {@link #get}.
*
*
Though the method signature doesn't say so explicitly, the returned map
* has {@link SortedSet} values.
*/
Map> asMap();
/**
* Returns the comparator that orders the multimap values, with a {@code null}
* indicating that natural ordering is used.
*/
Comparator valueComparator();
}