| /* |
| * Copyright (C) 2009 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 java.util.Collection; |
| import java.util.Collections; |
| import java.util.Set; |
| import org.checkerframework.checker.nullness.qual.Nullable; |
| |
| /** |
| * GWT implementation of {@link ImmutableSet} that forwards to another {@code Set} implementation. |
| * |
| * @author Hayward Chan |
| */ |
| @SuppressWarnings("serial") // Serialization only done in GWT. |
| public abstract class ForwardingImmutableSet<E> extends ImmutableSet<E> { |
| private final transient Set<E> delegate; |
| |
| ForwardingImmutableSet(Set<E> delegate) { |
| // TODO(cpovirk): are we over-wrapping? |
| this.delegate = Collections.unmodifiableSet(delegate); |
| } |
| |
| @Override |
| public UnmodifiableIterator<E> iterator() { |
| return Iterators.unmodifiableIterator(delegate.iterator()); |
| } |
| |
| @Override |
| public boolean contains(@Nullable Object object) { |
| return object != null && delegate.contains(object); |
| } |
| |
| @Override |
| public boolean containsAll(Collection<?> targets) { |
| return delegate.containsAll(targets); |
| } |
| |
| @Override |
| public int size() { |
| return delegate.size(); |
| } |
| |
| @Override |
| public boolean isEmpty() { |
| return delegate.isEmpty(); |
| } |
| |
| @Override |
| public Object[] toArray() { |
| return delegate.toArray(); |
| } |
| |
| @Override |
| public <T> T[] toArray(T[] other) { |
| return delegate.toArray(other); |
| } |
| |
| @Override |
| public String toString() { |
| return delegate.toString(); |
| } |
| |
| // TODO(cpovirk): equals(), as well, in case it's any faster than Sets.equalsImpl? |
| |
| @Override |
| public int hashCode() { |
| return delegate.hashCode(); |
| } |
| } |