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	/*
	* Copyright (c) 2000, 2021, Oracle and/or its affiliates. All rights reserved.
	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	*
	* This code is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 only, as
	* published by the Free Software Foundation. Oracle designates this
	* particular file as subject to the "Classpath" exception as provided
	* by Oracle in the LICENSE file that accompanied this code.
	*
	* This code is distributed in the hope that it will be useful, but WITHOUT
	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	* version 2 for more details (a copy is included in the LICENSE file that
	* accompanied this code).
	*
	* You should have received a copy of the GNU General Public License version
	* 2 along with this work; if not, write to the Free Software Foundation,
	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
	*
	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
	* or visit www.oracle.com if you need additional information or have any
	* questions.
	*/

	package sun.nio.ch;

	import java.io.IOException;
	import java.io.InputStream;
	import java.io.OutputStream;
	import java.net.InetAddress;
	import java.net.InetSocketAddress;
	import java.net.Socket;
	import java.net.SocketAddress;
	import java.net.SocketException;
	import java.net.SocketOption;
	import java.net.StandardSocketOptions;
	import java.nio.channels.SocketChannel;
	import java.security.AccessController;
	import java.security.PrivilegedActionException;
	import java.security.PrivilegedExceptionAction;
	import java.util.Set;

	import static java.util.concurrent.TimeUnit.MILLISECONDS;

	// Make a socket channel look like a socket.
	//
	// The methods in this class are defined in exactly the same order as in
	// java.net.Socket so as to simplify tracking future changes to that class.
	//

	class SocketAdaptor
	extends Socket
	{
	// The channel being adapted
	private final SocketChannelImpl sc;

	// Timeout "option" value for reads
	private volatile int timeout;

	private SocketAdaptor(SocketChannelImpl sc) throws SocketException {
	super(DummySocketImpl.create());
	this.sc = sc;
	}

	@SuppressWarnings("removal")
	static Socket create(SocketChannelImpl sc) {
	PrivilegedExceptionAction<Socket> pa = () -> new SocketAdaptor(sc);
	try {
	return AccessController.doPrivileged(pa);
	} catch (PrivilegedActionException pae) {
	throw new InternalError("Should not reach here", pae);
	}
	}

	private InetSocketAddress localAddress() {
	return (InetSocketAddress) sc.localAddress();
	}

	private InetSocketAddress remoteAddress() {
	return (InetSocketAddress) sc.remoteAddress();
	}

	@Override
	public void connect(SocketAddress remote) throws IOException {
	connect(remote, 0);
	}

	@Override
	public void connect(SocketAddress remote, int timeout) throws IOException {
	if (remote == null)
	throw new IllegalArgumentException("connect: The address can't be null");
	if (timeout < 0)
	throw new IllegalArgumentException("connect: timeout can't be negative");
	try {
	if (timeout > 0) {
	long nanos = MILLISECONDS.toNanos(timeout);
	sc.blockingConnect(remote, nanos);
	} else {
	sc.blockingConnect(remote, Long.MAX_VALUE);
	}
	} catch (Exception e) {
	Net.translateException(e, true);
	}
	}

	@Override
	public void bind(SocketAddress local) throws IOException {
	try {
	sc.bind(local);
	} catch (Exception x) {
	Net.translateException(x);
	}
	}

	@Override
	public InetAddress getInetAddress() {
	InetSocketAddress remote = remoteAddress();
	if (remote == null) {
	return null;
	} else {
	return remote.getAddress();
	}
	}

	@Override
	public InetAddress getLocalAddress() {
	if (sc.isOpen()) {
	InetSocketAddress local = localAddress();
	if (local != null) {
	return Net.getRevealedLocalAddress(local).getAddress();
	}
	}
	return new InetSocketAddress(0).getAddress();
	}

	@Override
	public int getPort() {
	InetSocketAddress remote = remoteAddress();
	if (remote == null) {
	return 0;
	} else {
	return remote.getPort();
	}
	}

	@Override
	public int getLocalPort() {
	InetSocketAddress local = localAddress();
	if (local == null) {
	return -1;
	} else {
	return local.getPort();
	}
	}

	@Override
	public SocketAddress getRemoteSocketAddress() {
	return sc.remoteAddress();
	}

	@Override
	public SocketAddress getLocalSocketAddress() {
	return Net.getRevealedLocalAddress(sc.localAddress());
	}

	@Override
	public SocketChannel getChannel() {
	return sc;
	}

	@Override
	public InputStream getInputStream() throws IOException {
	if (!sc.isOpen())
	throw new SocketException("Socket is closed");
	if (!sc.isConnected())
	throw new SocketException("Socket is not connected");
	if (!sc.isInputOpen())
	throw new SocketException("Socket input is shutdown");
	return new InputStream() {
	@Override
	public int read() throws IOException {
	byte[] a = new byte[1];
	int n = read(a, 0, 1);
	return (n > 0) ? (a[0] & 0xff) : -1;
	}
	@Override
	public int read(byte[] b, int off, int len) throws IOException {
	int timeout = SocketAdaptor.this.timeout;
	if (timeout > 0) {
	long nanos = MILLISECONDS.toNanos(timeout);
	return sc.blockingRead(b, off, len, nanos);
	} else {
	return sc.blockingRead(b, off, len, 0);
	}
	}
	@Override
	public int available() throws IOException {
	return sc.available();
	}
	@Override
	public void close() throws IOException {
	sc.close();
	}
	};
	}

	@Override
	public OutputStream getOutputStream() throws IOException {
	if (!sc.isOpen())
	throw new SocketException("Socket is closed");
	if (!sc.isConnected())
	throw new SocketException("Socket is not connected");
	if (!sc.isOutputOpen())
	throw new SocketException("Socket output is shutdown");
	return new OutputStream() {
	@Override
	public void write(int b) throws IOException {
	byte[] a = new byte[]{(byte) b};
	write(a, 0, 1);
	}
	@Override
	public void write(byte[] b, int off, int len) throws IOException {
	sc.blockingWriteFully(b, off, len);
	}
	@Override
	public void close() throws IOException {
	sc.close();
	}
	};
	}

	private void setBooleanOption(SocketOption<Boolean> name, boolean value)
	throws SocketException
	{
	try {
	sc.setOption(name, value);
	} catch (IOException x) {
	Net.translateToSocketException(x);
	}
	}

	private void setIntOption(SocketOption<Integer> name, int value)
	throws SocketException
	{
	try {
	sc.setOption(name, value);
	} catch (IOException x) {
	Net.translateToSocketException(x);
	}
	}

	private boolean getBooleanOption(SocketOption<Boolean> name) throws SocketException {
	try {
	return sc.getOption(name).booleanValue();
	} catch (IOException x) {
	Net.translateToSocketException(x);
	return false; // keep compiler happy
	}
	}

	private int getIntOption(SocketOption<Integer> name) throws SocketException {
	try {
	return sc.getOption(name).intValue();
	} catch (IOException x) {
	Net.translateToSocketException(x);
	return -1; // keep compiler happy
	}
	}

	@Override
	public void setTcpNoDelay(boolean on) throws SocketException {
	setBooleanOption(StandardSocketOptions.TCP_NODELAY, on);
	}

	@Override
	public boolean getTcpNoDelay() throws SocketException {
	return getBooleanOption(StandardSocketOptions.TCP_NODELAY);
	}

	@Override
	public void setSoLinger(boolean on, int linger) throws SocketException {
	if (!on)
	linger = -1;
	setIntOption(StandardSocketOptions.SO_LINGER, linger);
	}

	@Override
	public int getSoLinger() throws SocketException {
	return getIntOption(StandardSocketOptions.SO_LINGER);
	}

	@Override
	public void sendUrgentData(int data) throws IOException {
	int n = sc.sendOutOfBandData((byte) data);
	if (n == 0)
	throw new IOException("Socket buffer full");
	}

	@Override
	public void setOOBInline(boolean on) throws SocketException {
	setBooleanOption(ExtendedSocketOption.SO_OOBINLINE, on);
	}

	@Override
	public boolean getOOBInline() throws SocketException {
	return getBooleanOption(ExtendedSocketOption.SO_OOBINLINE);
	}

	@Override
	public void setSoTimeout(int timeout) throws SocketException {
	if (!sc.isOpen())
	throw new SocketException("Socket is closed");
	if (timeout < 0)
	throw new IllegalArgumentException("timeout < 0");
	this.timeout = timeout;
	}

	@Override
	public int getSoTimeout() throws SocketException {
	if (!sc.isOpen())
	throw new SocketException("Socket is closed");
	return timeout;
	}

	@Override
	public void setSendBufferSize(int size) throws SocketException {
	// size 0 valid for SocketChannel, invalid for Socket
	if (size <= 0)
	throw new IllegalArgumentException("Invalid send size");
	setIntOption(StandardSocketOptions.SO_SNDBUF, size);
	}

	@Override
	public int getSendBufferSize() throws SocketException {
	return getIntOption(StandardSocketOptions.SO_SNDBUF);
	}

	@Override
	public void setReceiveBufferSize(int size) throws SocketException {
	// size 0 valid for SocketChannel, invalid for Socket
	if (size <= 0)
	throw new IllegalArgumentException("Invalid receive size");
	setIntOption(StandardSocketOptions.SO_RCVBUF, size);
	}

	@Override
	public int getReceiveBufferSize() throws SocketException {
	return getIntOption(StandardSocketOptions.SO_RCVBUF);
	}

	@Override
	public void setKeepAlive(boolean on) throws SocketException {
	setBooleanOption(StandardSocketOptions.SO_KEEPALIVE, on);
	}

	@Override
	public boolean getKeepAlive() throws SocketException {
	return getBooleanOption(StandardSocketOptions.SO_KEEPALIVE);
	}

	@Override
	public void setTrafficClass(int tc) throws SocketException {
	setIntOption(StandardSocketOptions.IP_TOS, tc);
	}

	@Override
	public int getTrafficClass() throws SocketException {
	return getIntOption(StandardSocketOptions.IP_TOS);
	}

	@Override
	public void setReuseAddress(boolean on) throws SocketException {
	setBooleanOption(StandardSocketOptions.SO_REUSEADDR, on);
	}

	@Override
	public boolean getReuseAddress() throws SocketException {
	return getBooleanOption(StandardSocketOptions.SO_REUSEADDR);
	}

	@Override
	public void close() throws IOException {
	sc.close();
	}

	@Override
	public void shutdownInput() throws IOException {
	try {
	sc.shutdownInput();
	} catch (Exception x) {
	Net.translateException(x);
	}
	}

	@Override
	public void shutdownOutput() throws IOException {
	try {
	sc.shutdownOutput();
	} catch (Exception x) {
	Net.translateException(x);
	}
	}

	@Override
	public String toString() {
	if (sc.isConnected())
	return "Socket[addr=" + getInetAddress() +
	",port=" + getPort() +
	",localport=" + getLocalPort() + "]";
	return "Socket[unconnected]";
	}

	@Override
	public boolean isConnected() {
	return sc.isConnected();
	}

	@Override
	public boolean isBound() {
	return sc.localAddress() != null;
	}

	@Override
	public boolean isClosed() {
	return !sc.isOpen();
	}

	@Override
	public boolean isInputShutdown() {
	return !sc.isInputOpen();
	}

	@Override
	public boolean isOutputShutdown() {
	return !sc.isOutputOpen();
	}

	@Override
	public <T> Socket setOption(SocketOption<T> name, T value) throws IOException {
	sc.setOption(name, value);
	return this;
	}

	@Override
	public <T> T getOption(SocketOption<T> name) throws IOException {
	return sc.getOption(name);
	}

	@Override
	public Set<SocketOption<?>> supportedOptions() {
	return sc.supportedOptions();
	}
	}

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