/*
    * 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 java.util.Collection;
  import java.util.Map;
  import java.util.Map.Entry;
  import java.util.Set;
  
  import javax.annotation.Nullable;
  
  /**
   * A multimap which forwards all its method calls to another multimap.
   * Subclasses should override one or more methods to modify the behavior of
   * the backing multimap as desired per the <a
   * href="http://en.wikipedia.org/wiki/Decorator_pattern">decorator pattern</a>.
   *
   * @author Robert Konigsberg
   * @since 2.0 (imported from Google Collections Library)
   */
  @GwtCompatible
  public abstract class ForwardingMultimap<K, V> extends ForwardingObject
      implements Multimap<K, V> {
  
    /** Constructor for use by subclasses. */
    protected ForwardingMultimap() {}
  
    @Override protected abstract Multimap<K, V> delegate();
  
    @Override
    public Map<K, Collection<V>> asMap() {
      return delegate().asMap();
    }
  
    @Override
    public void clear() {
      delegate().clear();
    }
  
    @Override
    public boolean containsEntry(@Nullable Object key, @Nullable Object value) {
      return delegate().containsEntry(key, value);
    }
  
    @Override
    public boolean containsKey(@Nullable Object key) {
      return delegate().containsKey(key);
    }
  
    @Override
    public boolean containsValue(@Nullable Object value) {
      return delegate().containsValue(value);
    }
  
    @Override
    public Collection<Entry<K, V>> entries() {
      return delegate().entries();
    }
  
    @Override
    public Collection<V> get(@Nullable K key) {
      return delegate().get(key);
    }
  
    @Override
    public boolean isEmpty() {
      return delegate().isEmpty();
    }
  
    @Override
    public Multiset<K> keys() {
      return delegate().keys();
    }
  
    @Override
    public Set<K> keySet() {
      return delegate().keySet();
    }
  
    @Override
    public boolean put(K key, V value) {
      return delegate().put(key, value);
    }
 
   @Override
   public boolean putAll(K key, Iterable<? extends V> values) {
     return delegate().putAll(key, values);
   }
 
   @Override
   public boolean putAll(Multimap<? extends K, ? extends V> multimap) {
     return delegate().putAll(multimap);
   }
 
   @Override
   public boolean remove(@Nullable Object key, @Nullable Object value) {
     return delegate().remove(key, value);
   }
 
   @Override
   public Collection<V> removeAll(@Nullable Object key) {
     return delegate().removeAll(key);
   }
 
   @Override
   public Collection<V> replaceValues(K key, Iterable<? extends V> values) {
     return delegate().replaceValues(key, values);
   }
 
   @Override
   public int size() {
     return delegate().size();
   }
 
   @Override
   public Collection<V> values() {
     return delegate().values();
   }
 
   @Override public boolean equals(@Nullable Object object) {
     return object == this || delegate().equals(object);
   }
 
   @Override public int hashCode() {
     return delegate().hashCode();
   }
 }