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/*
 * 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.Map;
import java.util.Map.Entry;
import java.util.Set;
import javax.annotation.CheckForNull;
import org.checkerframework.checker.nullness.qual.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 decorator pattern.
 *
 * 

{@code default} method warning: This class does not forward calls to {@code * default} methods. Instead, it inherits their default implementations. When those implementations * invoke methods, they invoke methods on the {@code ForwardingMultimap}. * * @author Robert Konigsberg * @since 2.0 */ @GwtCompatible @ElementTypesAreNonnullByDefault public abstract class ForwardingMultimap extends ForwardingObject implements Multimap { /** Constructor for use by subclasses. */ protected ForwardingMultimap() {} @Override protected abstract Multimap delegate(); @Override public Map> asMap() { return delegate().asMap(); } @Override public void clear() { delegate().clear(); } @Override public boolean containsEntry(@CheckForNull Object key, @CheckForNull Object value) { return delegate().containsEntry(key, value); } @Override public boolean containsKey(@CheckForNull Object key) { return delegate().containsKey(key); } @Override public boolean containsValue(@CheckForNull Object value) { return delegate().containsValue(value); } @Override public Collection> entries() { return delegate().entries(); } @Override public Collection get(@ParametricNullness K key) { return delegate().get(key); } @Override public boolean isEmpty() { return delegate().isEmpty(); } @Override public Multiset keys() { return delegate().keys(); } @Override public Set keySet() { return delegate().keySet(); } @CanIgnoreReturnValue @Override public boolean put(@ParametricNullness K key, @ParametricNullness V value) { return delegate().put(key, value); } @CanIgnoreReturnValue @Override public boolean putAll(@ParametricNullness K key, Iterable values) { return delegate().putAll(key, values); } @CanIgnoreReturnValue @Override public boolean putAll(Multimap multimap) { return delegate().putAll(multimap); } @CanIgnoreReturnValue @Override public boolean remove(@CheckForNull Object key, @CheckForNull Object value) { return delegate().remove(key, value); } @CanIgnoreReturnValue @Override public Collection removeAll(@CheckForNull Object key) { return delegate().removeAll(key); } @CanIgnoreReturnValue @Override public Collection replaceValues(@ParametricNullness K key, Iterable values) { return delegate().replaceValues(key, values); } @Override public int size() { return delegate().size(); } @Override public Collection values() { return delegate().values(); } @Override public boolean equals(@CheckForNull Object object) { return object == this || delegate().equals(object); } @Override public int hashCode() { return delegate().hashCode(); } }





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