Java example source code file (SortedSetMultimap.java)

This example Java source code file (SortedSetMultimap.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

annotation, canignorereturnvalue, collection, comparator, gwtcompatible, iterable, object, override, sortedset, sortedsetmultimap, util

The SortedSetMultimap.java Java example source code

/*
 * 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.
 *
 * <p>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.
 *
 * <p>See the Guava User Guide article on  {
  // 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.
   *
   * <p>Changes to the returned collection will update the underlying multimap,
   * and vice versa.
   *
   * <p>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<V> get(@Nullable K key);

  /**
   * Removes all values associated with a given key.
   *
   * <p>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<V> removeAll(@Nullable Object key);

  /**
   * Stores a collection of values with the same key, replacing any existing
   * values for that key.
   *
   * <p>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.
   *
   * <p>Any duplicates in {@code values} will be stored in the multimap once.
   */
  @CanIgnoreReturnValue
  @Override
  SortedSet<V> 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}.
   *
   * <p>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.
   *
   * <p>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<K, SortedSet}, call
   * {@link Multimaps#asMap(SortedSetMultimap)} instead.
   */
  @Override
  Map<K, Collection asMap();

  /**
   * Returns the comparator that orders the multimap values, with {@code null}
   * indicating that natural ordering is used.
   */
  Comparator<? super V> valueComparator();
}