org.apache.mina.core.future.DefaultReadFuture Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF 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
*
* 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.apache.mina.core.future;
import java.io.IOException;
import org.apache.mina.core.RuntimeIoException;
import org.apache.mina.core.session.IoSession;
/**
* A default implementation of {@link WriteFuture}.
*
* @author Apache MINA Project
*/
public class DefaultReadFuture extends DefaultIoFuture implements ReadFuture {
/** A static object used when the session is closed */
private static final Object CLOSED = new Object();
/**
* Creates a new instance.
*
* @param session The associated session
*/
public DefaultReadFuture(IoSession session) {
super(session);
}
/**
* {@inheritDoc}
*/
@Override
public Object getMessage() {
if (isDone()) {
Object v = getValue();
if (v == CLOSED) {
return null;
}
if (v instanceof RuntimeException) {
throw (RuntimeException) v;
}
if (v instanceof Error) {
throw (Error) v;
}
if (v instanceof IOException || v instanceof Exception) {
throw new RuntimeIoException((Exception) v);
}
return v;
}
return null;
}
/**
* {@inheritDoc}
*/
@Override
public boolean isRead() {
if (isDone()) {
Object v = getValue();
return v != CLOSED && !(v instanceof Throwable);
}
return false;
}
/**
* {@inheritDoc}
*/
@Override
public boolean isClosed() {
if (isDone()) {
return getValue() == CLOSED;
}
return false;
}
/**
* {@inheritDoc}
*/
@Override
public Throwable getException() {
if (isDone()) {
Object v = getValue();
if (v instanceof Throwable) {
return (Throwable)v;
}
}
return null;
}
/**
* {@inheritDoc}
*/
@Override
public void setClosed() {
setValue(CLOSED);
}
/**
* {@inheritDoc}
*/
@Override
public void setRead(Object message) {
if (message == null) {
throw new IllegalArgumentException("message");
}
setValue(message);
}
/**
* {@inheritDoc}
*/
@Override
public void setException(Throwable exception) {
if (exception == null) {
throw new IllegalArgumentException("exception");
}
setValue(exception);
}
/**
* {@inheritDoc}
*/
@Override
public ReadFuture await() throws InterruptedException {
return (ReadFuture) super.await();
}
/**
* {@inheritDoc}
*/
@Override
public ReadFuture awaitUninterruptibly() {
return (ReadFuture) super.awaitUninterruptibly();
}
/**
* {@inheritDoc}
*/
@Override
public ReadFuture addListener(IoFutureListener listener) {
return (ReadFuture) super.addListener(listener);
}
/**
* {@inheritDoc}
*/
@Override
public ReadFuture removeListener(IoFutureListener listener) {
return (ReadFuture) super.removeListener(listener);
}
}