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/*
 * Copyright (C) Posten Norge AS
 *
 * 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 no.digipost.concurrent.executor;

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;

import static java.util.Collections.emptyList;


public class ExternallyManagedExecutorService implements ExecutorService {

    private final ExecutorService executor;

    public ExternallyManagedExecutorService(ExecutorService executor) {
        this.executor = executor;
    }

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

    @Override
    public void shutdown() {
        return;
    }

    @Override
    public List shutdownNow() {
        return emptyList();
    }

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

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

    @Override
    public boolean awaitTermination(long timeout, TimeUnit unit) {
        return executor.isTerminated();
    }

    @Override
    public  Future submit(Callable task) {
        return executor.submit(task);
    }

    @Override
    public  Future submit(Runnable task, T result) {
        return executor.submit(task, result);
    }

    @Override
    public Future submit(Runnable task) {
        return executor.submit(task);
    }

    @Override
    public  List> invokeAll(Collection> tasks) throws InterruptedException {
        return executor.invokeAll(tasks);
    }

    @Override
    public  List> invokeAll(Collection> tasks, long timeout, TimeUnit unit) throws InterruptedException {
        return executor.invokeAll(tasks, timeout, unit);
    }

    @Override
    public  T invokeAny(Collection> tasks) throws InterruptedException, ExecutionException {
        return executor.invokeAny(tasks);
    }

    @Override
    public  T invokeAny(Collection> tasks, long timeout, TimeUnit unit) throws InterruptedException, ExecutionException, TimeoutException {
        return executor.invokeAny(tasks, timeout, unit);
    }

}