| /* |
| * 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.util.concurrent; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| |
| import com.google.common.annotations.GwtCompatible; |
| import java.util.concurrent.ExecutionException; |
| import java.util.concurrent.Executor; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.TimeoutException; |
| |
| /** |
| * {@link FluentFuture} that forwards all calls to a delegate. |
| * |
| * <h3>Extension</h3> |
| * |
| * If you want a class like {@code FluentFuture} but with extra methods, we recommend declaring your |
| * own subclass of {@link ListenableFuture}, complete with a method like {@link #from} to adapt an |
| * existing {@code ListenableFuture}, implemented atop a {@link ForwardingListenableFuture} that |
| * forwards to that future and adds the desired methods. |
| */ |
| @GwtCompatible |
| final class ForwardingFluentFuture<V> extends FluentFuture<V> { |
| private final ListenableFuture<V> delegate; |
| |
| ForwardingFluentFuture(ListenableFuture<V> delegate) { |
| this.delegate = checkNotNull(delegate); |
| } |
| |
| @Override |
| public void addListener(Runnable listener, Executor executor) { |
| delegate.addListener(listener, executor); |
| } |
| |
| @Override |
| public boolean cancel(boolean mayInterruptIfRunning) { |
| return delegate.cancel(mayInterruptIfRunning); |
| } |
| |
| @Override |
| public boolean isCancelled() { |
| return delegate.isCancelled(); |
| } |
| |
| @Override |
| public boolean isDone() { |
| return delegate.isDone(); |
| } |
| |
| @Override |
| public V get() throws InterruptedException, ExecutionException { |
| return delegate.get(); |
| } |
| |
| @Override |
| public V get(long timeout, TimeUnit unit) |
| throws InterruptedException, ExecutionException, TimeoutException { |
| return delegate.get(timeout, unit); |
| } |
| } |