org.apache.mina.core.future.DefaultReadFuture Maven / Gradle / Ivy
/**
* Copyright 2007-2015, Kaazing Corporation. All rights reserved.
*
* 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.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 {
private static final Object CLOSED = new Object();
/**
* Creates a new instance.
*/
public DefaultReadFuture(IoSession session) {
super(session);
}
public Object getMessage() {
if (isDone()) {
Object v = getValue();
if (v == CLOSED) {
return null;
}
if (v instanceof ExceptionHolder) {
v = ((ExceptionHolder) v).exception;
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;
}
public boolean isRead() {
if (isDone()) {
Object v = getValue();
return (v != CLOSED && !(v instanceof ExceptionHolder));
}
return false;
}
public boolean isClosed() {
if (isDone()) {
return getValue() == CLOSED;
}
return false;
}
public Throwable getException() {
if (isDone()) {
Object v = getValue();
if (v instanceof ExceptionHolder) {
return ((ExceptionHolder) v).exception;
}
}
return null;
}
public void setClosed() {
setValue(CLOSED);
}
public void setRead(Object message) {
if (message == null) {
throw new NullPointerException("message");
}
setValue(message);
}
public void setException(Throwable exception) {
if (exception == null) {
throw new NullPointerException("exception");
}
setValue(new ExceptionHolder(exception));
}
@Override
public ReadFuture await() throws InterruptedException {
return (ReadFuture) super.await();
}
@Override
public ReadFuture awaitUninterruptibly() {
return (ReadFuture) super.awaitUninterruptibly();
}
@Override
public ReadFuture addListener(IoFutureListener listener) {
return (ReadFuture) super.addListener(listener);
}
@Override
public ReadFuture removeListener(IoFutureListener listener) {
return (ReadFuture) super.removeListener(listener);
}
private static class ExceptionHolder {
private final Throwable exception;
private ExceptionHolder(Throwable exception) {
this.exception = exception;
}
}
}