/*
* Copyright 2015 Odnoklassniki Ltd, Mail.Ru Group
*
* 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 one.nio.async;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
public class CombinedFuture<V> implements Future<List<V>>, Serializable {
private Future<V>[] futures;
public CombinedFuture(Future<V>... futures) {
this.futures = futures;
}
@SuppressWarnings("unchecked")
public CombinedFuture(Collection<Future> futures) {
this.futures = futures.toArray(new Future[futures.size()]);
}
@Override
public boolean cancel(boolean mayInterruptIfRunning) {
boolean result = true;
for (Future<V> future : futures) {
result &= future.cancel(mayInterruptIfRunning);
}
return result;
}
@Override
public boolean isCancelled() {
boolean result = true;
for (Future<V> future : futures) {
result &= future.isCancelled();
}
return result;
}
@Override
public boolean isDone() {
boolean result = true;
for (Future<V> future : futures) {
result &= future.isDone();
}
return result;
}
@Override
public List<V> get() throws InterruptedException, ExecutionException {
ArrayList<V> result = new ArrayList<V>(futures.length);
for (Future<V> future : futures) {
result.add(future.get());
}
return result;
}
@Override
public List<V> get(long timeout, TimeUnit unit) throws InterruptedException, ExecutionException, TimeoutException {
ArrayList<V> result = new ArrayList<V>(futures.length);
for (Future<V> future : futures) {
result.add(future.get(timeout, unit));
}
return result;
}
}