/*
* JBoss, Home of Professional Open Source
*
* Copyright 2008 Red Hat, Inc. and/or its affiliates.
*
* 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 org.xnio;
import java.util.concurrent.
TimeUnit;
import java.io.
IOException;
/**
* An {@code IoFuture} implementation that wraps a different type of {@code IoFuture}. Used to create general wrappers
* that convert one channel type to another.
*
* @param <T> the type of this future result
* @param <D> the type of the delegate result
*/
public abstract class
AbstractConvertingIoFuture<T, D> implements
IoFuture<T> {
/**
* The delegate future result.
*/
protected final
IoFuture<? extends D>
delegate;
protected
AbstractConvertingIoFuture(final
IoFuture<? extends D>
delegate) {
this.
delegate =
delegate;
}
protected
IoFuture<? extends D>
getDelegate() {
return
delegate;
}
public
IoFuture<T>
cancel() {
delegate.
cancel();
return this;
}
public
Status getStatus() {
return
delegate.
getStatus();
}
public
Status await() {
return
delegate.
await();
}
public
Status await(final long
time, final
TimeUnit timeUnit) {
return
delegate.
await(
time,
timeUnit);
}
public
Status awaitInterruptibly() throws
InterruptedException {
return
delegate.
awaitInterruptibly();
}
public
Status awaitInterruptibly(final long
time, final
TimeUnit timeUnit) throws
InterruptedException {
return
delegate.
awaitInterruptibly(
time,
timeUnit);
}
public
IOException getException() throws
IllegalStateException {
return
delegate.
getException();
}
public T
get() throws
IOException {
return
convert(
delegate.
get());
}
public T
getInterruptibly() throws
IOException,
InterruptedException {
return
convert(
delegate.
getInterruptibly());
}
abstract protected T
convert(D
arg) throws
IOException;
public <A>
IoFuture<T>
addNotifier(final
Notifier<? super T, A>
notifier, A
attachment) {
delegate.
addNotifier(new
Notifier<D, A>() {
public void
notify(final
IoFuture<? extends D>
future, A
attachment) {
notifier.
notify(
AbstractConvertingIoFuture.this,
attachment);
}
},
attachment);
return this;
}
}