org.objectfabric.CompletedFuture Maven / Gradle / Ivy
/**
* This file is part of ObjectFabric (http://objectfabric.org).
*
* ObjectFabric is licensed under the Apache License, Version 2.0, the terms
* of which may be found at http://www.apache.org/licenses/LICENSE-2.0.html.
*
* Copyright ObjectFabric Inc.
*
* This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
* WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
package org.objectfabric;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
/**
* This future simply returns its given value. Useful when a future is needed and the
* corresponding value has already been computed.
*/
final class CompletedFuture implements Future {
private final V _value;
public CompletedFuture(V value) {
_value = value;
}
//
@Override
public boolean cancel(boolean mayInterruptIfRunning) {
return false;
}
@Override
public V get() throws ExecutionException {
return _value;
}
@Override
public V get(long timeout, TimeUnit unit) throws ExecutionException {
return get();
}
@Override
public boolean isCancelled() {
return false;
}
@Override
public boolean isDone() {
return true;
}
}