Java example source code file (ListMultimap.java)

This example Java source code file (ListMultimap.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, gwtcompatible, iterable, list, listmultimap, multimap, object, override, util

The ListMultimap.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.List;
import java.util.Map;

import javax.annotation.Nullable;

/**
 * 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.
 *
 * <p>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.
 *
 * <p>See the Guava User Guide article on  {
  /**
   * {@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 java.util.Collection} specified in the {@link Multimap} interface.
   */
  @Override
  List<V> get(@Nullable K 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 java.util.Collection} specified in the {@link Multimap} interface.
   */
  @CanIgnoreReturnValue
  @Override
  List<V> removeAll(@Nullable Object 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 java.util.Collection} specified in the {@link Multimap} interface.
   */
  @CanIgnoreReturnValue
  @Override
  List<V> replaceValues(K key, Iterable values);

  /**
   * {@inheritDoc}
   *
   * <p>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<K, List}, call {@link Multimaps#asMap(ListMultimap)}
   * instead.
   */
  @Override
  Map<K, Collection 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.
   *
   * <p>An empty {@code ListMultimap} is equal to any other empty {@code
   * Multimap}, including an empty {@code SetMultimap}.
   */
  @Override
  boolean equals(@Nullable Object obj);
}