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186 lines
4.8 KiB
186 lines
4.8 KiB
/*
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* Copyright (c) 1995, 2016, Oracle and/or its affiliates. All rights reserved.
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* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*/
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package java.net;
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import java.io.FileDescriptor;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.nio.channels.FileChannel;
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/**
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* This stream extends FileOutputStream to implement a
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* SocketOutputStream. Note that this class should <b>NOT</b> be
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* public.
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*
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* @author Jonathan Payne
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* @author Arthur van Hoff
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*/
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class SocketOutputStream extends FileOutputStream
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{
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static {
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init();
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}
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private AbstractPlainSocketImpl impl = null;
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private byte temp[] = new byte[1];
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private Socket socket = null;
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/**
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* Creates a new SocketOutputStream. Can only be called
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* by a Socket. This method needs to hang on to the owner Socket so
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* that the fd will not be closed.
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* @param impl the socket output stream inplemented
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*/
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SocketOutputStream(AbstractPlainSocketImpl impl) throws IOException {
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super(impl.getFileDescriptor());
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this.impl = impl;
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socket = impl.getSocket();
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}
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/**
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* Returns the unique {@link java.nio.channels.FileChannel FileChannel}
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* object associated with this file output stream. </p>
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*
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* The {@code getChannel} method of {@code SocketOutputStream}
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* returns {@code null} since it is a socket based stream.</p>
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*
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* @return the file channel associated with this file output stream
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*
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* @since 1.4
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* @spec JSR-51
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*/
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public final FileChannel getChannel() {
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return null;
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}
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/**
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* Writes to the socket.
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* @param fd the FileDescriptor
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* @param b the data to be written
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* @param off the start offset in the data
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* @param len the number of bytes that are written
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* @exception IOException If an I/O error has occurred.
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*/
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private native void socketWrite0(FileDescriptor fd, byte[] b, int off,
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int len) throws IOException;
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/**
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* Writes to the socket with appropriate locking of the
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* FileDescriptor.
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* @param b the data to be written
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* @param off the start offset in the data
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* @param len the number of bytes that are written
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* @exception IOException If an I/O error has occurred.
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*/
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private void socketWrite(byte b[], int off, int len) throws IOException {
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if (len <= 0 || off < 0 || len > b.length - off) {
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if (len == 0) {
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return;
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}
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throw new ArrayIndexOutOfBoundsException("len == " + len
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+ " off == " + off + " buffer length == " + b.length);
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}
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FileDescriptor fd = impl.acquireFD();
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try {
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socketWrite0(fd, b, off, len);
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} catch (SocketException se) {
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if (se instanceof sun.net.ConnectionResetException) {
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impl.setConnectionResetPending();
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se = new SocketException("Connection reset");
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}
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if (impl.isClosedOrPending()) {
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throw new SocketException("Socket closed");
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} else {
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throw se;
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}
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} finally {
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impl.releaseFD();
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}
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}
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/**
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* Writes a byte to the socket.
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* @param b the data to be written
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* @exception IOException If an I/O error has occurred.
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*/
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public void write(int b) throws IOException {
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temp[0] = (byte)b;
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socketWrite(temp, 0, 1);
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}
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/**
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* Writes the contents of the buffer <i>b</i> to the socket.
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* @param b the data to be written
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* @exception SocketException If an I/O error has occurred.
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*/
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public void write(byte b[]) throws IOException {
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socketWrite(b, 0, b.length);
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}
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/**
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* Writes <i>length</i> bytes from buffer <i>b</i> starting at
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* offset <i>len</i>.
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* @param b the data to be written
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* @param off the start offset in the data
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* @param len the number of bytes that are written
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* @exception SocketException If an I/O error has occurred.
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*/
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public void write(byte b[], int off, int len) throws IOException {
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socketWrite(b, off, len);
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}
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/**
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* Closes the stream.
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*/
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private boolean closing = false;
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public void close() throws IOException {
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// Prevent recursion. See BugId 4484411
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if (closing)
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return;
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closing = true;
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if (socket != null) {
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if (!socket.isClosed())
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socket.close();
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} else
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impl.close();
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closing = false;
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}
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/**
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* Overrides finalize, the fd is closed by the Socket.
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*/
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protected void finalize() {}
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/**
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* Perform class load-time initializations.
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*/
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private native static void init();
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}
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