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| 1 | /* | ||
| 2 | * Copyright (c) 1995, 2007, Oracle and/or its affiliates. All rights reserved. | ||
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| 4 | * | ||
| 5 | * This code is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License version 2 only, as | ||
| 7 | * published by the Free Software Foundation. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | package java.net; | ||
| 27 | |||
| 28 | import java.io.FileDescriptor; | ||
| 29 | import java.io.FileOutputStream; | ||
| 30 | import java.io.IOException; | ||
| 31 | import java.nio.channels.FileChannel; | ||
| 32 | |||
| 33 | /** | ||
| 34 | * This stream extends FileOutputStream to implement a | ||
| 35 | * SocketOutputStream. Note that this class should <b>NOT</b> be | ||
| 36 | * public. | ||
| 37 | * | ||
| 38 | * @author Jonathan Payne | ||
| 39 | * @author Arthur van Hoff | ||
| 40 | */ | ||
| 41 | class SocketOutputStream extends FileOutputStream | ||
| 42 | { | ||
| 43 | static { | ||
| 44 | init(); | ||
| 45 | } | ||
| 46 | |||
| 47 | private AbstractPlainSocketImpl impl = null; | ||
| 48 | private byte temp[] = new byte[1]; | ||
| 49 | private Socket socket = null; | ||
| 50 | |||
| 51 | /** | ||
| 52 | * Creates a new SocketOutputStream. Can only be called | ||
| 53 | * by a Socket. This method needs to hang on to the owner Socket so | ||
| 54 | * that the fd will not be closed. | ||
| 55 | * @param impl the socket output stream inplemented | ||
| 56 | */ | ||
| 57 | SocketOutputStream(AbstractPlainSocketImpl impl) throws IOException { | ||
| 58 | super(impl.getFileDescriptor()); | ||
| 59 | this.impl = impl; | ||
| 60 | socket = impl.getSocket(); | ||
| 61 | } | ||
| 62 | |||
| 63 | /** | ||
| 64 | * Returns the unique {@link java.nio.channels.FileChannel FileChannel} | ||
| 65 | * object associated with this file output stream. </p> | ||
| 66 | * | ||
| 67 | * The <code>getChannel</code> method of <code>SocketOutputStream</code> | ||
| 68 | * returns <code>null</code> since it is a socket based stream.</p> | ||
| 69 | * | ||
| 70 | * @return the file channel associated with this file output stream | ||
| 71 | * | ||
| 72 | * @since 1.4 | ||
| 73 | * @spec JSR-51 | ||
| 74 | */ | ||
| 75 | public final FileChannel getChannel() { | ||
| 76 | return null; | ||
| 77 | } | ||
| 78 | |||
| 79 | /** | ||
| 80 | * Writes to the socket. | ||
| 81 | * @param fd the FileDescriptor | ||
| 82 | * @param b the data to be written | ||
| 83 | * @param off the start offset in the data | ||
| 84 | * @param len the number of bytes that are written | ||
| 85 | * @exception IOException If an I/O error has occurred. | ||
| 86 | */ | ||
| 87 | private native void socketWrite0(FileDescriptor fd, byte[] b, int off, | ||
| 88 | int len) throws IOException; | ||
| 89 | |||
| 90 | /** | ||
| 91 | * Writes to the socket with appropriate locking of the | ||
| 92 | * FileDescriptor. | ||
| 93 | * @param b the data to be written | ||
| 94 | * @param off the start offset in the data | ||
| 95 | * @param len the number of bytes that are written | ||
| 96 | * @exception IOException If an I/O error has occurred. | ||
| 97 | */ | ||
| 98 | private void socketWrite(byte b[], int off, int len) throws IOException { | ||
| 99 | |||
| 100 | if (len <= 0 || off < 0 || off + len > b.length) { | ||
| 101 | if (len == 0) { | ||
| 102 | return; | ||
| 103 | } | ||
| 104 | throw new ArrayIndexOutOfBoundsException(); | ||
| 105 | } | ||
| 106 | |||
| 107 | FileDescriptor fd = impl.acquireFD(); | ||
| 108 | try { | ||
| 109 | socketWrite0(fd, b, off, len); | ||
| 110 | } catch (SocketException se) { | ||
| 111 | if (se instanceof sun.net.ConnectionResetException) { | ||
| 112 | impl.setConnectionResetPending(); | ||
| 113 | se = new SocketException("Connection reset"); | ||
| 114 | } | ||
| 115 | if (impl.isClosedOrPending()) { | ||
| 116 | throw new SocketException("Socket closed"); | ||
| 117 | } else { | ||
| 118 | throw se; | ||
| 119 | } | ||
| 120 | } finally { | ||
| 121 | impl.releaseFD(); | ||
| 122 | } | ||
| 123 | } | ||
| 124 | |||
| 125 | /** | ||
| 126 | * Writes a byte to the socket. | ||
| 127 | * @param b the data to be written | ||
| 128 | * @exception IOException If an I/O error has occurred. | ||
| 129 | */ | ||
| 130 | public void write(int b) throws IOException { | ||
| 131 | temp[0] = (byte)b; | ||
| 132 | socketWrite(temp, 0, 1); | ||
| 133 | } | ||
| 134 | |||
| 135 | /** | ||
| 136 | * Writes the contents of the buffer <i>b</i> to the socket. | ||
| 137 | * @param b the data to be written | ||
| 138 | * @exception SocketException If an I/O error has occurred. | ||
| 139 | */ | ||
| 140 | public void write(byte b[]) throws IOException { | ||
| 141 | socketWrite(b, 0, b.length); | ||
| 142 | } | ||
| 143 | |||
| 144 | /** | ||
| 145 | * Writes <i>length</i> bytes from buffer <i>b</i> starting at | ||
| 146 | * offset <i>len</i>. | ||
| 147 | * @param b the data to be written | ||
| 148 | * @param off the start offset in the data | ||
| 149 | * @param len the number of bytes that are written | ||
| 150 | * @exception SocketException If an I/O error has occurred. | ||
| 151 | */ | ||
| 152 | public void write(byte b[], int off, int len) throws IOException { | ||
| 153 | socketWrite(b, off, len); | ||
| 154 | } | ||
| 155 | |||
| 156 | /** | ||
| 157 | * Closes the stream. | ||
| 158 | */ | ||
| 159 | private boolean closing = false; | ||
| 160 | public void close() throws IOException { | ||
| 161 | // Prevent recursion. See BugId 4484411 | ||
| 162 | if (closing) | ||
| 163 | return; | ||
| 164 | closing = true; | ||
| 165 | if (socket != null) { | ||
| 166 | if (!socket.isClosed()) | ||
| 167 | socket.close(); | ||
| 168 | } else | ||
| 169 | impl.close(); | ||
| 170 | closing = false; | ||
| 171 | } | ||
| 172 | |||
| 173 | /** | ||
| 174 | * Overrides finalize, the fd is closed by the Socket. | ||
| 175 | */ | ||
| 176 | protected void finalize() {} | ||
| 177 | |||
| 178 | /** | ||
| 179 | * Perform class load-time initializations. | ||
| 180 | */ | ||
| 181 | private native static void init(); | ||
| 182 | |||
| 183 | } | ||