/*
 * 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.jackrabbit.oak.commons.internal.concurrent;

import java.util.Collection;
import java.util.List;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

/**
 * A {@link ExecutorService} that delegates all the calls to another executor
 */
public abstract class ForwardingExecutorService implements ExecutorService {

    public abstract ExecutorService delegate();

    @Override
    public void execute(Runnable command) {
        this.delegate().execute(command);
    }

    @Override
    public Future<?> submit(Runnable task) {
        return this.delegate().submit(task);
    }

    @Override
    public <T> Future<T> submit(Runnable task, T result) {
        return this.delegate().submit(task, result);
    }

    @Override
    public <T> Future<T> submit(Callable<T> task) {
        return this.delegate().submit(task);
    }

    @Override
    public void shutdown() {
        this.delegate().shutdown();
    }

    @Override
    public List<Runnable> shutdownNow() {
        return this.delegate().shutdownNow();
    }

    @Override
    public boolean isShutdown() {
        return this.delegate().isShutdown();
    }

    @Override
    public boolean isTerminated() {
        return this.delegate().isTerminated();
    }

    @Override
    public boolean awaitTermination(long timeout, TimeUnit unit) throws InterruptedException {
        return this.delegate().awaitTermination(timeout, unit);
    }

    @Override
    public <T> List<Future<T>> invokeAll(Collection<? extends Callable<T>> tasks)
            throws InterruptedException {
        return this.delegate().invokeAll(tasks);
    }

    @Override
    public <T> List<Future<T>> invokeAll(Collection<? extends Callable<T>> tasks, long timeout, TimeUnit unit)
            throws InterruptedException {
        return this.delegate().invokeAll(tasks, timeout, unit);
    }

    @Override
    public <T> T invokeAny(Collection<? extends Callable<T>> tasks)
            throws InterruptedException, ExecutionException {
        return this.delegate().invokeAny(tasks);
    }

    @Override
    public <T> T invokeAny(Collection<? extends Callable<T>> tasks, long timeout, TimeUnit unit)
            throws InterruptedException, ExecutionException, TimeoutException {
        return this.delegate().invokeAny(tasks, timeout, unit);
    }
}
