FileOutputStream.java revision 12f2d8e2760b78c673b7a187b9062b3938a03147
1adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project/* 2adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * Licensed to the Apache Software Foundation (ASF) under one or more 3adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * contributor license agreements. See the NOTICE file distributed with 4adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * this work for additional information regarding copyright ownership. 5adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * The ASF licenses this file to You under the Apache License, Version 2.0 6adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * (the "License"); you may not use this file except in compliance with 7adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * the License. You may obtain a copy of the License at 8adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * 9adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 10adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * 11adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * Unless required by applicable law or agreed to in writing, software 12adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 13adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * See the License for the specific language governing permissions and 15adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * limitations under the License. 16adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 17adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 18adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Projectpackage java.io; 19adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 20f7aab022dcbfcd8f27b409ab92b4bca4a84d0b8aBrian Carlstromimport dalvik.system.CloseGuard; 21ae704b984c10a63883cc366e823d53902d6ac7a9Elliott Hughesimport java.nio.NioUtils; 22adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Projectimport java.nio.channels.FileChannel; 2399a89dd6f0a0e1396aa9b3feebf15ea31f703d3aElliott Hughesimport libcore.io.IoUtils; 24adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Projectimport org.apache.harmony.luni.platform.IFileSystem; 25adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Projectimport org.apache.harmony.luni.platform.Platform; 26adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 27adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project/** 28024784c977a744708ab0bcefc4337d491e429937Jesse Wilson * An output stream that writes bytes to a file. If the output file exists, it 29024784c977a744708ab0bcefc4337d491e429937Jesse Wilson * can be replaced or appended to. If it does not exist, a new file will be 30024784c977a744708ab0bcefc4337d491e429937Jesse Wilson * created. 31024784c977a744708ab0bcefc4337d491e429937Jesse Wilson * <pre> {@code 32024784c977a744708ab0bcefc4337d491e429937Jesse Wilson * File file = ... 33024784c977a744708ab0bcefc4337d491e429937Jesse Wilson * OutputStream out = null; 34024784c977a744708ab0bcefc4337d491e429937Jesse Wilson * try { 35024784c977a744708ab0bcefc4337d491e429937Jesse Wilson * out = new BufferedOutputStream(new FileOutputStream(file)); 36024784c977a744708ab0bcefc4337d491e429937Jesse Wilson * ... 37024784c977a744708ab0bcefc4337d491e429937Jesse Wilson * } finally { 38024784c977a744708ab0bcefc4337d491e429937Jesse Wilson * if (out != null) { 39024784c977a744708ab0bcefc4337d491e429937Jesse Wilson * out.close(); 40024784c977a744708ab0bcefc4337d491e429937Jesse Wilson * } 41024784c977a744708ab0bcefc4337d491e429937Jesse Wilson * } 42024784c977a744708ab0bcefc4337d491e429937Jesse Wilson * }</pre> 43024784c977a744708ab0bcefc4337d491e429937Jesse Wilson * 44024784c977a744708ab0bcefc4337d491e429937Jesse Wilson * <p>This stream is <strong>not buffered</strong>. Most callers should wrap 45024784c977a744708ab0bcefc4337d491e429937Jesse Wilson * this stream with a {@link BufferedOutputStream}. 46024784c977a744708ab0bcefc4337d491e429937Jesse Wilson * 47024784c977a744708ab0bcefc4337d491e429937Jesse Wilson * <p>Use {@link FileWriter} to write characters, as opposed to bytes, to a file. 48f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson * 49adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @see BufferedOutputStream 50adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @see FileInputStream 51adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 52adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Projectpublic class FileOutputStream extends OutputStream implements Closeable { 53adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 54024784c977a744708ab0bcefc4337d491e429937Jesse Wilson private final FileDescriptor fd; 55adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 56024784c977a744708ab0bcefc4337d491e429937Jesse Wilson private final boolean shouldCloseFd; 57adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 58024784c977a744708ab0bcefc4337d491e429937Jesse Wilson /** The unique file channel. Lazily initialized because it's rarely needed. */ 59adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project private FileChannel channel; 60adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 61024784c977a744708ab0bcefc4337d491e429937Jesse Wilson /** File access mode */ 62024784c977a744708ab0bcefc4337d491e429937Jesse Wilson private final int mode; 63024784c977a744708ab0bcefc4337d491e429937Jesse Wilson 6412f2d8e2760b78c673b7a187b9062b3938a03147Brian Carlstrom private final CloseGuard guard = CloseGuard.get(); 65f7aab022dcbfcd8f27b409ab92b4bca4a84d0b8aBrian Carlstrom 66adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /** 67024784c977a744708ab0bcefc4337d491e429937Jesse Wilson * Constructs a new {@code FileOutputStream} that writes to {@code file}. 68f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson * 69024784c977a744708ab0bcefc4337d491e429937Jesse Wilson * @param file the file to which this stream writes. 70024784c977a744708ab0bcefc4337d491e429937Jesse Wilson * @throws FileNotFoundException if file cannot be opened for writing. 71024784c977a744708ab0bcefc4337d491e429937Jesse Wilson * @throws SecurityException if a {@code SecurityManager} is installed and 72024784c977a744708ab0bcefc4337d491e429937Jesse Wilson * it denies the write request. 73f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson * @see java.lang.SecurityManager#checkWrite(FileDescriptor) 74adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 75adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project public FileOutputStream(File file) throws FileNotFoundException { 76adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project this(file, false); 77adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 78adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 79adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /** 80024784c977a744708ab0bcefc4337d491e429937Jesse Wilson * Constructs a new {@code FileOutputStream} that writes to {@code file}, 81024784c977a744708ab0bcefc4337d491e429937Jesse Wilson * creating it if necessary. If {@code append} is true and the file already 82024784c977a744708ab0bcefc4337d491e429937Jesse Wilson * exists, it will be appended to. Otherwise a new file will be created. 83f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson * 84024784c977a744708ab0bcefc4337d491e429937Jesse Wilson * @param file the file to which this stream writes. 85024784c977a744708ab0bcefc4337d491e429937Jesse Wilson * @param append true to append to an existing file. 86024784c977a744708ab0bcefc4337d491e429937Jesse Wilson * @throws FileNotFoundException if the file cannot be opened for writing. 87024784c977a744708ab0bcefc4337d491e429937Jesse Wilson * @throws SecurityException if a {@code SecurityManager} is installed and 88024784c977a744708ab0bcefc4337d491e429937Jesse Wilson * it denies the write request. 89f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson * @see java.lang.SecurityManager#checkWrite(FileDescriptor) 90f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson * @see java.lang.SecurityManager#checkWrite(String) 91adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 92adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project public FileOutputStream(File file, boolean append) 93adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project throws FileNotFoundException { 94024784c977a744708ab0bcefc4337d491e429937Jesse Wilson SecurityManager securityManager = System.getSecurityManager(); 95024784c977a744708ab0bcefc4337d491e429937Jesse Wilson if (securityManager != null) { 96024784c977a744708ab0bcefc4337d491e429937Jesse Wilson securityManager.checkWrite(file.getPath()); 97adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 98024784c977a744708ab0bcefc4337d491e429937Jesse Wilson this.fd = new FileDescriptor(); 99024784c977a744708ab0bcefc4337d491e429937Jesse Wilson this.mode = append ? IFileSystem.O_APPEND : IFileSystem.O_WRONLY; 100024784c977a744708ab0bcefc4337d491e429937Jesse Wilson this.fd.descriptor = Platform.FILE_SYSTEM.open(file.getAbsolutePath(), mode); 101024784c977a744708ab0bcefc4337d491e429937Jesse Wilson this.shouldCloseFd = true; 10212f2d8e2760b78c673b7a187b9062b3938a03147Brian Carlstrom this.guard.open("close"); 103adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 104adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 105adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /** 106024784c977a744708ab0bcefc4337d491e429937Jesse Wilson * Constructs a new {@code FileOutputStream} that writes to {@code fd}. 107f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson * 108024784c977a744708ab0bcefc4337d491e429937Jesse Wilson * @param fd the FileDescriptor to which this stream writes. 109024784c977a744708ab0bcefc4337d491e429937Jesse Wilson * @throws NullPointerException if {@code fd} is null. 110024784c977a744708ab0bcefc4337d491e429937Jesse Wilson * @throws SecurityException if a {@code SecurityManager} is installed and 111024784c977a744708ab0bcefc4337d491e429937Jesse Wilson * it denies the write request. 112f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson * @see java.lang.SecurityManager#checkWrite(FileDescriptor) 113adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 114adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project public FileOutputStream(FileDescriptor fd) { 115adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (fd == null) { 116b1396870f92135aa140bd2b86221768dea5bc11dElliott Hughes throw new NullPointerException(); 117adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 118024784c977a744708ab0bcefc4337d491e429937Jesse Wilson SecurityManager securityManager = System.getSecurityManager(); 119024784c977a744708ab0bcefc4337d491e429937Jesse Wilson if (securityManager != null) { 120024784c977a744708ab0bcefc4337d491e429937Jesse Wilson securityManager.checkWrite(fd); 121adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 122adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project this.fd = fd; 123024784c977a744708ab0bcefc4337d491e429937Jesse Wilson this.shouldCloseFd = false; 124024784c977a744708ab0bcefc4337d491e429937Jesse Wilson this.channel = NioUtils.newFileChannel(this, fd.descriptor, IFileSystem.O_WRONLY); 125024784c977a744708ab0bcefc4337d491e429937Jesse Wilson this.mode = IFileSystem.O_WRONLY; 12612f2d8e2760b78c673b7a187b9062b3938a03147Brian Carlstrom this.guard.open("close"); 127adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 128adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 129adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /** 130024784c977a744708ab0bcefc4337d491e429937Jesse Wilson * Equivalent to {@code new FileOutputStream(new File(path), false)}. 131adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 132024784c977a744708ab0bcefc4337d491e429937Jesse Wilson public FileOutputStream(String path) throws FileNotFoundException { 133024784c977a744708ab0bcefc4337d491e429937Jesse Wilson this(path, false); 134adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 135adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 136adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /** 137024784c977a744708ab0bcefc4337d491e429937Jesse Wilson * Equivalent to {@code new FileOutputStream(new File(path), append)}. 138adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 139024784c977a744708ab0bcefc4337d491e429937Jesse Wilson public FileOutputStream(String path, boolean append) throws FileNotFoundException { 140024784c977a744708ab0bcefc4337d491e429937Jesse Wilson this(new File(path), append); 141adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 142adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 143adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project @Override 144adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project public void close() throws IOException { 14512f2d8e2760b78c673b7a187b9062b3938a03147Brian Carlstrom guard.close(); 146adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project synchronized (this) { 147024784c977a744708ab0bcefc4337d491e429937Jesse Wilson if (channel != null) { 148024784c977a744708ab0bcefc4337d491e429937Jesse Wilson channel.close(); 149024784c977a744708ab0bcefc4337d491e429937Jesse Wilson } 150024784c977a744708ab0bcefc4337d491e429937Jesse Wilson if (shouldCloseFd && fd.valid()) { 15199a89dd6f0a0e1396aa9b3feebf15ea31f703d3aElliott Hughes IoUtils.close(fd); 152adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 153adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 154adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 155adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 156adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /** 157adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * Frees any resources allocated for this stream before it is garbage 158adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * collected. This method is called from the Java Virtual Machine. 159f5597e626ecf7949d249dea08c1a2964d890ec11Jesse Wilson * 160adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * @throws IOException 161adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project * if an error occurs attempting to finalize this stream. 162adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 163e2f58c9501eac730d048199906dc41fe8e4cd6e9Brian Carlstrom @Override protected void finalize() throws IOException { 164024784c977a744708ab0bcefc4337d491e429937Jesse Wilson try { 16512f2d8e2760b78c673b7a187b9062b3938a03147Brian Carlstrom if (guard != null) { 16612f2d8e2760b78c673b7a187b9062b3938a03147Brian Carlstrom guard.warnIfOpen(); 16712f2d8e2760b78c673b7a187b9062b3938a03147Brian Carlstrom } 168e2f58c9501eac730d048199906dc41fe8e4cd6e9Brian Carlstrom close(); 169e2f58c9501eac730d048199906dc41fe8e4cd6e9Brian Carlstrom } finally { 170e2f58c9501eac730d048199906dc41fe8e4cd6e9Brian Carlstrom try { 171e2f58c9501eac730d048199906dc41fe8e4cd6e9Brian Carlstrom super.finalize(); 172e2f58c9501eac730d048199906dc41fe8e4cd6e9Brian Carlstrom } catch (Throwable t) { 17363fcdd7e833df417cfbd60961a5167ce637f3071Brian Carlstrom // for consistency with the RI, we must override Object.finalize() to 17463fcdd7e833df417cfbd60961a5167ce637f3071Brian Carlstrom // remove the 'throws Throwable' clause. 175e2f58c9501eac730d048199906dc41fe8e4cd6e9Brian Carlstrom throw new AssertionError(t); 176e2f58c9501eac730d048199906dc41fe8e4cd6e9Brian Carlstrom } 177024784c977a744708ab0bcefc4337d491e429937Jesse Wilson } 178adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 179adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 180adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /** 181024784c977a744708ab0bcefc4337d491e429937Jesse Wilson * Returns a write-only {@link FileChannel} that shares its position with 182024784c977a744708ab0bcefc4337d491e429937Jesse Wilson * this stream. 183adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 184adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project public FileChannel getChannel() { 185024784c977a744708ab0bcefc4337d491e429937Jesse Wilson synchronized (this) { 186024784c977a744708ab0bcefc4337d491e429937Jesse Wilson if (channel == null) { 187024784c977a744708ab0bcefc4337d491e429937Jesse Wilson channel = NioUtils.newFileChannel(this, fd.descriptor, mode); 188024784c977a744708ab0bcefc4337d491e429937Jesse Wilson } 189024784c977a744708ab0bcefc4337d491e429937Jesse Wilson return channel; 190024784c977a744708ab0bcefc4337d491e429937Jesse Wilson } 191adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 192adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 193adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project /** 194024784c977a744708ab0bcefc4337d491e429937Jesse Wilson * Returns the underlying file descriptor. 195adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project */ 196adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project public final FileDescriptor getFD() throws IOException { 197adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project return fd; 198adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 199adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 200adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project @Override 201adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project public void write(byte[] buffer) throws IOException { 202adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project write(buffer, 0, buffer.length); 203adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 204adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 205adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project @Override 206adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project public void write(byte[] buffer, int offset, int count) throws IOException { 207adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (buffer == null) { 208b1396870f92135aa140bd2b86221768dea5bc11dElliott Hughes throw new NullPointerException("buffer == null"); 209adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 210adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if ((count | offset) < 0 || count > buffer.length - offset) { 211b1396870f92135aa140bd2b86221768dea5bc11dElliott Hughes throw new IndexOutOfBoundsException(); 212adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 213adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project if (count == 0) { 214adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project return; 215adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 216024784c977a744708ab0bcefc4337d491e429937Jesse Wilson checkOpen(); 2173db0d1b07a79c3c871b0aa0929674adae3081b4fElliott Hughes Platform.FILE_SYSTEM.write(fd.descriptor, buffer, offset, count); 218adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 219adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 220adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project @Override 221adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project public void write(int oneByte) throws IOException { 222024784c977a744708ab0bcefc4337d491e429937Jesse Wilson checkOpen(); 223024784c977a744708ab0bcefc4337d491e429937Jesse Wilson byte[] buffer = { (byte) oneByte }; 224024784c977a744708ab0bcefc4337d491e429937Jesse Wilson Platform.FILE_SYSTEM.write(fd.descriptor, buffer, 0, 1); 225adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 226adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project 227024784c977a744708ab0bcefc4337d491e429937Jesse Wilson private synchronized void checkOpen() throws IOException { 228024784c977a744708ab0bcefc4337d491e429937Jesse Wilson if (!fd.valid()) { 229024784c977a744708ab0bcefc4337d491e429937Jesse Wilson throw new IOException("stream is closed"); 230adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 231adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project } 232adc854b798c1cfe3bfd4c27d68d5cee38ca617daThe Android Open Source Project} 233