io.netty.channel.group.VoidChannelGroupFuture Maven / Gradle / Ivy
/*
* Copyright 2016 The Netty Project
*
* The Netty Project 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:
*
* https://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 io.netty.channel.group;
import io.netty.channel.Channel;
import io.netty.channel.ChannelFuture;
import io.netty.util.concurrent.Future;
import io.netty.util.concurrent.GenericFutureListener;
import java.util.Collections;
import java.util.Iterator;
import java.util.concurrent.TimeUnit;
// Suppress a warning about returning the same iterator since it always returns an empty iterator
final class VoidChannelGroupFuture implements ChannelGroupFuture { // lgtm[java/iterable-wraps-iterator]
private static final Iterator EMPTY = Collections.emptyList().iterator();
private final ChannelGroup group;
VoidChannelGroupFuture(ChannelGroup group) {
this.group = group;
}
@Override
public ChannelGroup group() {
return group;
}
@Override
public ChannelFuture find(Channel channel) {
return null;
}
@Override
public boolean isSuccess() {
return false;
}
@Override
public ChannelGroupException cause() {
return null;
}
@Override
public boolean isPartialSuccess() {
return false;
}
@Override
public boolean isPartialFailure() {
return false;
}
@Override
public ChannelGroupFuture addListener(GenericFutureListener extends Future super Void>> listener) {
throw reject();
}
@Override
public ChannelGroupFuture addListeners(GenericFutureListener extends Future super Void>>... listeners) {
throw reject();
}
@Override
public ChannelGroupFuture removeListener(GenericFutureListener extends Future super Void>> listener) {
throw reject();
}
@Override
public ChannelGroupFuture removeListeners(GenericFutureListener extends Future super Void>>... listeners) {
throw reject();
}
@Override
public ChannelGroupFuture await() {
throw reject();
}
@Override
public ChannelGroupFuture awaitUninterruptibly() {
throw reject();
}
@Override
public ChannelGroupFuture syncUninterruptibly() {
throw reject();
}
@Override
public ChannelGroupFuture sync() {
throw reject();
}
@Override
public Iterator iterator() {
return EMPTY;
}
@Override
public boolean isCancellable() {
return false;
}
@Override
public boolean await(long timeout, TimeUnit unit) {
throw reject();
}
@Override
public boolean await(long timeoutMillis) {
throw reject();
}
@Override
public boolean awaitUninterruptibly(long timeout, TimeUnit unit) {
throw reject();
}
@Override
public boolean awaitUninterruptibly(long timeoutMillis) {
throw reject();
}
@Override
public Void getNow() {
return null;
}
/**
* {@inheritDoc}
*
* @param mayInterruptIfRunning this value has no effect in this implementation.
*/
@Override
public boolean cancel(boolean mayInterruptIfRunning) {
return false;
}
@Override
public boolean isCancelled() {
return false;
}
@Override
public boolean isDone() {
return false;
}
@Override
public Void get() {
throw reject();
}
@Override
public Void get(long timeout, TimeUnit unit) {
throw reject();
}
private static RuntimeException reject() {
return new IllegalStateException("void future");
}
}
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