All Downloads are FREE. Search and download functionalities are using the official Maven repository.

jersey.repackaged.com.google.common.collect.EnumHashBiMap Maven / Gradle / Ivy

There is a newer version: 2.26-b03
Show newest version
/*
 * 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 jersey.repackaged.com.google.common.collect;

import static jersey.repackaged.com.google.common.base.Preconditions.checkNotNull;

import jersey.repackaged.com.google.common.annotations.GwtCompatible;
import jersey.repackaged.com.google.common.annotations.GwtIncompatible;

import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.EnumMap;
import java.util.HashMap;
import java.util.Map;

import javax.annotation.Nullable;

/**
 * A {@code BiMap} backed by an {@code EnumMap} instance for keys-to-values, and
 * a {@code HashMap} instance for values-to-keys. Null keys are not permitted,
 * but null values are. An {@code EnumHashBiMap} and its inverse are both
 * serializable.
 * 
 * 

See the Guava User Guide article on * {@code BiMap}. * * @author Mike Bostock * @since 2.0 (imported from Google Collections Library) */ @GwtCompatible(emulated = true) public final class EnumHashBiMap, V> extends AbstractBiMap { private transient Class keyType; /** * Returns a new, empty {@code EnumHashBiMap} using the specified key type. * * @param keyType the key type */ public static , V> EnumHashBiMap create(Class keyType) { return new EnumHashBiMap(keyType); } /** * Constructs a new bimap with the same mappings as the specified map. If the * specified map is an {@code EnumHashBiMap} or an {@link EnumBiMap}, the new * bimap has the same key type as the input bimap. Otherwise, the specified * map must contain at least one mapping, in order to determine the key type. * * @param map the map whose mappings are to be placed in this map * @throws IllegalArgumentException if map is not an {@code EnumBiMap} or an * {@code EnumHashBiMap} instance and contains no mappings */ public static , V> EnumHashBiMap create(Map map) { EnumHashBiMap bimap = create(EnumBiMap.inferKeyType(map)); bimap.putAll(map); return bimap; } private EnumHashBiMap(Class keyType) { super(WellBehavedMap.wrap( new EnumMap(keyType)), Maps.newHashMapWithExpectedSize( keyType.getEnumConstants().length)); this.keyType = keyType; } // Overriding these 3 methods to show that values may be null (but not keys) @Override K checkKey(K key) { return checkNotNull(key); } @Override public V put(K key, @Nullable V value) { return super.put(key, value); } @Override public V forcePut(K key, @Nullable V value) { return super.forcePut(key, value); } /** Returns the associated key type. */ public Class keyType() { return keyType; } /** * @serialData the key class, number of entries, first key, first value, * second key, second value, and so on. */ @GwtIncompatible("java.io.ObjectOutputStream") private void writeObject(ObjectOutputStream stream) throws IOException { stream.defaultWriteObject(); stream.writeObject(keyType); Serialization.writeMap(this, stream); } @SuppressWarnings("unchecked") // reading field populated by writeObject @GwtIncompatible("java.io.ObjectInputStream") private void readObject(ObjectInputStream stream) throws IOException, ClassNotFoundException { stream.defaultReadObject(); keyType = (Class) stream.readObject(); setDelegates(WellBehavedMap.wrap(new EnumMap(keyType)), new HashMap(keyType.getEnumConstants().length * 3 / 2)); Serialization.populateMap(this, stream); } @GwtIncompatible("only needed in emulated source.") private static final long serialVersionUID = 0; }





© 2015 - 2024 Weber Informatics LLC | Privacy Policy