com.google.common.collect.JdkBackedImmutableMap Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of wildfly-client-all

This artifact provides a single jar that contains all classes required to use remote Jakarta Enterprise Beans and Jakarta Messaging, including all dependencies. It is intended for use by those not using maven, maven users should just import the Jakarta Enterprise Beans and Jakarta Messaging BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

There is a newer version: 35.0.0.Final

Show newest version

/*
 * Copyright (C) 2018 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 static com.google.common.base.Preconditions.checkNotNull;
import static com.google.common.collect.RegularImmutableMap.makeImmutable;

import com.google.common.annotations.GwtCompatible;
import java.util.Map;
import java.util.function.BiConsumer;
import org.checkerframework.checker.nullness.compatqual.NullableDecl;

/**
 * Implementation of ImmutableMap backed by a JDK HashMap, which has smartness protecting against
 * hash flooding.
 */
@GwtCompatible(emulated = true)
final class JdkBackedImmutableMap extends ImmutableMap {
  /**
   * Creates an {@code ImmutableMap} backed by a JDK HashMap. Used when probable hash flooding is
   * detected. This implementation may replace the entries in entryArray with its own entry objects
   * (though they will have the same key/value contents), and will take ownership of entryArray.
   */
  static  ImmutableMap create(int n, Entry[] entryArray) {
    Map delegateMap = Maps.newHashMapWithExpectedSize(n);
    for (int i = 0; i < n; i++) {
      entryArray[i] = makeImmutable(entryArray[i]);
      V oldValue = delegateMap.putIfAbsent(entryArray[i].getKey(), entryArray[i].getValue());
      if (oldValue != null) {
        throw conflictException("key", entryArray[i], entryArray[i].getKey() + "=" + oldValue);
      }
    }
    return new JdkBackedImmutableMap<>(delegateMap, ImmutableList.asImmutableList(entryArray, n));
  }

  private final transient Map delegateMap;
  private final transient ImmutableList> entries;

  JdkBackedImmutableMap(Map delegateMap, ImmutableList> entries) {
    this.delegateMap = delegateMap;
    this.entries = entries;
  }

  @Override
  public int size() {
    return entries.size();
  }

  @Override
  public V get(@NullableDecl Object key) {
    return delegateMap.get(key);
  }

  @Override
  ImmutableSet> createEntrySet() {
    return new ImmutableMapEntrySet.RegularEntrySet(this, entries);
  }

  @Override
  public void forEach(BiConsumer action) {
    checkNotNull(action);
    entries.forEach(e -> action.accept(e.getKey(), e.getValue()));
  }

  @Override
  ImmutableSet createKeySet() {
    return new ImmutableMapKeySet(this);
  }

  @Override
  ImmutableCollection createValues() {
    return new ImmutableMapValues(this);
  }

  @Override
  boolean isPartialView() {
    return false;
  }
}