/
PipeImpl.java
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/
PipeImpl.java
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/* 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.harmony.nio.internal;
import java.io.FileDescriptor;
import java.io.IOException;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.nio.ByteBuffer;
import java.nio.channels.Pipe;
import java.nio.channels.ServerSocketChannel;
import java.nio.channels.spi.SelectorProvider;
import org.apache.harmony.luni.platform.FileDescriptorHandler;
/*
* default implementation of Pipe
*
*/
final class PipeImpl extends Pipe {
private SinkChannelImpl sink;
private SourceChannelImpl source;
private int serverPort;
public PipeImpl() throws IOException {
super();
try {
sink = new SinkChannelImpl(SelectorProvider.provider());
source = new SourceChannelImpl(SelectorProvider.provider());
sink.finishConnect();
source.accept();
source.closeServer();
} catch(IOException ioe){
reset();
throw ioe;
} catch(RuntimeException e){
reset();
throw e;
}
}
private void reset(){
if(sink != null){
try {
sink.close();
} catch (Exception e) {
}
}
if(source != null){
try {
source.closeServer();
} catch (Exception e) {
}
try {
source.close();
} catch (Exception e) {
}
}
}
/*
* @see java.nio.channels.Pipe#sink()
*/
public SinkChannel sink() {
return sink;
}
/*
* @see java.nio.channels.Pipe#source()
*/
public SourceChannel source() {
return source;
}
/*
* default implementation of SourceChannel
*/
private class SourceChannelImpl extends Pipe.SourceChannel implements
FileDescriptorHandler {
private SocketChannelImpl sourceSocket;
private ServerSocketChannel sourceServer;
/*
* constructor
*/
protected SourceChannelImpl(SelectorProvider provider)
throws IOException {
super(provider);
sourceServer = provider.openServerSocketChannel();
sourceServer.socket().bind(
new InetSocketAddress(InetAddress.getByName(null), 0));
serverPort = sourceServer.socket().getLocalPort();
}
void closeServer() throws IOException {
sourceServer.close();
}
void accept() throws IOException {
sourceSocket = (SocketChannelImpl) sourceServer.accept();
}
protected void implCloseSelectableChannel() throws IOException {
sourceSocket.close();
}
protected void implConfigureBlocking(boolean blockingMode)
throws IOException {
sourceSocket.configureBlocking(blockingMode);
}
public int read(ByteBuffer buffer) throws IOException {
return sourceSocket.read(buffer);
}
public long read(ByteBuffer[] buffers) throws IOException {
return read(buffers, 0, buffers.length);
}
public long read(ByteBuffer[] buffers, int offset, int length)
throws IOException {
return sourceSocket.read(buffers, offset, length);
}
public FileDescriptor getFD() {
return sourceSocket.getFD();
}
}
/*
* default implementation of SinkChannel
*/
private class SinkChannelImpl extends Pipe.SinkChannel implements
FileDescriptorHandler {
private SocketChannelImpl sinkSocket;
protected SinkChannelImpl(SelectorProvider provider) throws IOException {
super(provider);
sinkSocket = (SocketChannelImpl) provider.openSocketChannel();
}
public boolean finishConnect() throws IOException {
return sinkSocket.connect(
new InetSocketAddress(InetAddress.getByName(null), serverPort));
}
protected void implCloseSelectableChannel() throws IOException {
sinkSocket.close();
}
protected void implConfigureBlocking(boolean blockingMode)
throws IOException {
sinkSocket.configureBlocking(blockingMode);
}
public int write(ByteBuffer buffer) throws IOException {
return sinkSocket.write(buffer);
}
public long write(ByteBuffer[] buffers) throws IOException {
return write(buffers, 0, buffers.length);
}
public long write(ByteBuffer[] buffers, int offset, int length)
throws IOException {
return sinkSocket.write(buffers, offset, length);
}
public FileDescriptor getFD() {
return sinkSocket.getFD();
}
}
}