/*
    * Licensed to the Apache Software Foundation (ASF) under one or more
    * contributor license agreements.  See the NOTICE file distributed with
    * this work for additional information regarding copyright ownership.
    * The ASF licenses this file to You 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 org.apache.commons.collections4.splitmap;
  
  import java.util.Collection;
  import java.util.Map;
  import java.util.Objects;
  import java.util.Set;
  
  import org.apache.commons.collections4.IterableGet;
  import org.apache.commons.collections4.MapIterator;
  import org.apache.commons.collections4.map.EntrySetToMapIteratorAdapter;
  
  /**
   * {@link IterableGet} that uses a {@link Map}<K, V> for the
   * {@link org.apache.commons.collections4.Get Get}<K, V> implementation.
   *
   * @param <K> the type of the keys in this map
   * @param <V> the type of the values in this map
   * @since 4.0
   */
  public class AbstractIterableGetMapDecorator<K, V> implements IterableGet<K, V> {
  
      /** The map to decorate */
      transient Map<K, V> map;
  
      /**
       * Constructor only used in deserialization, do not use otherwise.
       */
      protected AbstractIterableGetMapDecorator() {
      }
  
      /**
       * Create a new AbstractSplitMapDecorator.
       * @param map the map to decorate, must not be null
       * @throws NullPointerException if map is null
       */
      public AbstractIterableGetMapDecorator(final Map<K, V> map) {
          this.map = Objects.requireNonNull(map, "map");
      }
  
      @Override
      public boolean containsKey(final Object key) {
          return decorated().containsKey(key);
      }
  
      @Override
      public boolean containsValue(final Object value) {
          return decorated().containsValue(value);
      }
  
      /**
       * Gets the map being decorated.
       *
       * @return the decorated map
       */
      protected Map<K, V> decorated() {
          return map;
      }
  
      @Override
      public Set<Map.Entry<K, V>> entrySet() {
          return decorated().entrySet();
      }
  
      @Override
      public boolean equals(final Object object) {
          if (object == this) {
              return true;
          }
          return decorated().equals(object);
      }
  
      @Override
      public V get(final Object key) {
          return decorated().get(key);
      }
  
      @Override
      public int hashCode() {
          return decorated().hashCode();
      }
  
      @Override
      public boolean isEmpty() {
         return decorated().isEmpty();
     }
 
     @Override
     public Set<K> keySet() {
         return decorated().keySet();
     }
 
     /**
      * Gets a MapIterator over this Get.
      * @return MapIterator&lt;K, V&gt;
      */
     @Override
     public MapIterator<K, V> mapIterator() {
         return new EntrySetToMapIteratorAdapter<>(entrySet());
     }
 
     @Override
     public V remove(final Object key) {
         return decorated().remove(key);
     }
 
     @Override
     public int size() {
         return decorated().size();
     }
 
     @Override
     public String toString() {
         return decorated().toString();
     }
 
     @Override
     public Collection<V> values() {
         return decorated().values();
     }
 
 }