libcore.io.IoBridge.open java code examples

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private void myMethod () {
 ScheduledThreadPoolExecutor s =new ScheduledThreadPoolExecutor(corePoolSize)
ThreadFactory threadFactory;new ScheduledThreadPoolExecutor(corePoolSize, threadFactory)
String str;new ScheduledThreadPoolExecutor(1, new ThreadFactoryBuilder().setNameFormat(str).build())
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}

/**
 * Constructs a new {@code FileInputStream} that reads from {@code file}.
 *
 * @param file
 *            the file from which this stream reads.
 * @throws FileNotFoundException
 *             if {@code file} does not exist.
 */
public FileInputStream(File file) throws FileNotFoundException {
  if (file == null) {
    throw new NullPointerException("file == null");
  }
  this.fd = IoBridge.open(file.getAbsolutePath(), O_RDONLY);
  this.shouldClose = true;
  guard.open("close");
}

/**
 * Constructs a new {@code FileOutputStream} that writes to {@code file}.
 * If {@code append} is true and the file already exists, it will be appended to; otherwise
 * it will be truncated. The file will be created if it does not exist.
 *
 * @throws FileNotFoundException if the file cannot be opened for writing.
 */
public FileOutputStream(File file, boolean append) throws FileNotFoundException {
  if (file == null) {
    throw new NullPointerException("file == null");
  }
  this.mode = O_WRONLY | O_CREAT | (append ? O_APPEND : O_TRUNC);
  this.fd = IoBridge.open(file.getAbsolutePath(), mode);
  this.shouldClose = true;
  this.guard.open("close");
}

this.fd = IoBridge.open(file.getAbsolutePath(), flags);

public FileReader(String absolutePath) throws IOException {
  // We use IoBridge.open because callers might differentiate
  // between a FileNotFoundException and a general IOException.
  //
  // NOTE: This costs us an additional call to fstat(2) to test whether
  // "absolutePath" is a directory or not. We can eliminate it
  // at the cost of copying some code from IoBridge.open.
  try {
    fd = IoBridge.open(absolutePath, O_RDONLY);
  } catch (FileNotFoundException fnfe) {
    throw fnfe;
  }
  int capacity;
  try {
    final StructStat stat = Libcore.os.fstat(fd);
    // Like RAF & other APIs, we assume that the file size fits
    // into a 32 bit integer.
    capacity = (int) stat.st_size;
    if (capacity == 0) {
      unknownLength = true;
      capacity = 8192;
    }
  } catch (ErrnoException exception) {
    closeQuietly(fd);
    throw exception.rethrowAsIOException();
  }
  bytes = new byte[capacity];
}

/**
 * Constructs a new {@code FileOutputStream} that writes to {@code file}.
 * If {@code append} is true and the file already exists, it will be appended to; otherwise
 * it will be truncated. The file will be created if it does not exist.
 *
 * @throws FileNotFoundException if the file cannot be opened for writing.
 */
public FileOutputStream(File file, boolean append) throws FileNotFoundException {
  if (file == null) {
    throw new NullPointerException("file == null");
  }
  this.mode = O_WRONLY | O_CREAT | (append ? O_APPEND : O_TRUNC);
  this.fd = IoBridge.open(file.getAbsolutePath(), mode);
  this.shouldClose = true;
  this.guard.open("close");
}

/**
 * Constructs a new {@code FileInputStream} that reads from {@code file}.
 *
 * @param file
 *            the file from which this stream reads.
 * @throws FileNotFoundException
 *             if {@code file} does not exist.
 */
public FileInputStream(File file) throws FileNotFoundException {
  if (file == null) {
    throw new NullPointerException("file == null");
  }
  this.fd = IoBridge.open(file.getAbsolutePath(), O_RDONLY);
  this.shouldClose = true;
  guard.open("close");
}

/**
 * Constructs a new {@code FileOutputStream} that writes to {@code file}.
 * If {@code append} is true and the file already exists, it will be appended to; otherwise
 * it will be truncated. The file will be created if it does not exist.
 *
 * @throws FileNotFoundException if the file cannot be opened for writing.
 */
public FileOutputStream(File file, boolean append) throws FileNotFoundException {
  if (file == null) {
    throw new NullPointerException("file == null");
  }
  this.mode = O_WRONLY | O_CREAT | (append ? O_APPEND : O_TRUNC);
  this.fd = IoBridge.open(file.getAbsolutePath(), mode);
  this.shouldClose = true;
  this.guard.open("close");
}

/**
 * Constructs a new {@code FileInputStream} that reads from {@code file}.
 *
 * @param file
 *            the file from which this stream reads.
 * @throws FileNotFoundException
 *             if {@code file} does not exist.
 */
public FileInputStream(File file) throws FileNotFoundException {
  if (file == null) {
    throw new NullPointerException("file == null");
  }
  this.fd = IoBridge.open(file.getAbsolutePath(), O_RDONLY);
  this.shouldClose = true;
  guard.open("close");
}

/**
 * Constructs a new {@code FileInputStream} that reads from {@code file}.
 *
 * @param file
 *            the file from which this stream reads.
 * @throws FileNotFoundException
 *             if {@code file} does not exist.
 */
public FileInputStream(File file) throws FileNotFoundException {
  if (file == null) {
    throw new NullPointerException("file == null");
  }
  this.fd = IoBridge.open(file.getAbsolutePath(), O_RDONLY);
  this.shouldClose = true;
  guard.open("close");
}

/**
 * Constructs a new {@code FileOutputStream} that writes to {@code file}.
 * If {@code append} is true and the file already exists, it will be appended to; otherwise
 * it will be truncated. The file will be created if it does not exist.
 *
 * @throws FileNotFoundException if the file cannot be opened for writing.
 */
public FileOutputStream(File file, boolean append) throws FileNotFoundException {
  if (file == null) {
    throw new NullPointerException("file == null");
  }
  this.mode = O_WRONLY | O_CREAT | (append ? O_APPEND : O_TRUNC);
  this.fd = IoBridge.open(file.getAbsolutePath(), mode);
  this.shouldClose = true;
  this.guard.open("close");
}

/**
 * Constructs a new {@code FileInputStream} that reads from {@code file}.
 *
 * @param file
 *            the file from which this stream reads.
 * @throws FileNotFoundException
 *             if {@code file} does not exist.
 */
public FileInputStream(File file) throws FileNotFoundException {
  if (file == null) {
    throw new NullPointerException("file == null");
  }
  this.fd = IoBridge.open(file.getAbsolutePath(), O_RDONLY);
  this.shouldClose = true;
  guard.open("close");
}

/**
 * Constructs a new {@code FileOutputStream} that writes to {@code file}.
 * If {@code append} is true and the file already exists, it will be appended to; otherwise
 * it will be truncated. The file will be created if it does not exist.
 *
 * @throws FileNotFoundException if the file cannot be opened for writing.
 */
public FileOutputStream(File file, boolean append) throws FileNotFoundException {
  if (file == null) {
    throw new NullPointerException("file == null");
  }
  this.mode = O_WRONLY | O_CREAT | (append ? O_APPEND : O_TRUNC);
  this.fd = IoBridge.open(file.getAbsolutePath(), mode);
  this.shouldClose = true;
  this.guard.open("close");
}

/**
 * Constructs a new {@code FileOutputStream} that writes to {@code file}.
 * If {@code append} is true and the file already exists, it will be appended to; otherwise
 * it will be truncated. The file will be created if it does not exist.
 *
 * @throws FileNotFoundException if the file cannot be opened for writing.
 */
public FileOutputStream(File file, boolean append) throws FileNotFoundException {
  if (file == null) {
    throw new NullPointerException("file == null");
  }
  this.mode = O_WRONLY | O_CREAT | (append ? O_APPEND : O_TRUNC);
  this.fd = IoBridge.open(file.getAbsolutePath(), mode);
  this.shouldClose = true;
  this.guard.open("close");
}

/**
 * Constructs a new {@code FileInputStream} that reads from {@code file}.
 *
 * @param file
 *            the file from which this stream reads.
 * @throws FileNotFoundException
 *             if {@code file} does not exist.
 */
public FileInputStream(File file) throws FileNotFoundException {
  if (file == null) {
    throw new NullPointerException("file == null");
  }
  this.fd = IoBridge.open(file.getAbsolutePath(), O_RDONLY);
  this.shouldClose = true;
  guard.open("close");
}

/**
 * Constructs a new {@code FileInputStream} that reads from {@code file}.
 *
 * @param file
 *            the file from which this stream reads.
 * @throws FileNotFoundException
 *             if {@code file} does not exist.
 */
public FileInputStream(File file) throws FileNotFoundException {
  if (file == null) {
    throw new NullPointerException("file == null");
  }
  this.fd = IoBridge.open(file.getAbsolutePath(), O_RDONLY);
  this.shouldClose = true;
  guard.open("close");
}

/**
 * Constructs a new {@code FileOutputStream} that writes to {@code file}.
 * If {@code append} is true and the file already exists, it will be appended to; otherwise
 * it will be truncated. The file will be created if it does not exist.
 *
 * @throws FileNotFoundException if the file cannot be opened for writing.
 */
public FileOutputStream(File file, boolean append) throws FileNotFoundException {
  if (file == null) {
    throw new NullPointerException("file == null");
  }
  this.mode = O_WRONLY | O_CREAT | (append ? O_APPEND : O_TRUNC);
  this.fd = IoBridge.open(file.getAbsolutePath(), mode);
  this.shouldClose = true;
  this.guard.open("close");
}

public FileReader(String absolutePath) throws IOException {
  // We use IoBridge.open because callers might differentiate
  // between a FileNotFoundException and a general IOException.
  //
  // NOTE: This costs us an additional call to fstat(2) to test whether
  // "absolutePath" is a directory or not. We can eliminate it
  // at the cost of copying some code from IoBridge.open.
  try {
    fd = IoBridge.open(absolutePath, O_RDONLY);
  } catch (FileNotFoundException fnfe) {
    throw fnfe;
  }
  int capacity;
  try {
    final StructStat stat = Libcore.os.fstat(fd);
    // Like RAF & other APIs, we assume that the file size fits
    // into a 32 bit integer.
    capacity = (int) stat.st_size;
    if (capacity == 0) {
      unknownLength = true;
      capacity = 8192;
    }
  } catch (ErrnoException exception) {
    closeQuietly(fd);
    throw exception.rethrowAsIOException();
  }
  bytes = new byte[capacity];
}

public FileReader(String absolutePath) throws IOException {
  // We use IoBridge.open because callers might differentiate
  // between a FileNotFoundException and a general IOException.
  //
  // NOTE: This costs us an additional call to fstat(2) to test whether
  // "absolutePath" is a directory or not. We can eliminate it
  // at the cost of copying some code from IoBridge.open.
  try {
    fd = IoBridge.open(absolutePath, O_RDONLY);
  } catch (FileNotFoundException fnfe) {
    throw fnfe;
  }
  int capacity;
  try {
    final StructStat stat = Libcore.os.fstat(fd);
    // Like RAF & other APIs, we assume that the file size fits
    // into a 32 bit integer.
    capacity = (int) stat.st_size;
    if (capacity == 0) {
      unknownLength = true;
      capacity = 8192;
    }
  } catch (ErrnoException exception) {
    closeQuietly(fd);
    throw exception.rethrowAsIOException();
  }
  bytes = new byte[capacity];
}

public FileReader(String absolutePath) throws IOException {
  // We use IoBridge.open because callers might differentiate
  // between a FileNotFoundException and a general IOException.
  //
  // NOTE: This costs us an additional call to fstat(2) to test whether
  // "absolutePath" is a directory or not. We can eliminate it
  // at the cost of copying some code from IoBridge.open.
  try {
    fd = IoBridge.open(absolutePath, O_RDONLY);
  } catch (FileNotFoundException fnfe) {
    throw fnfe;
  }
  int capacity;
  try {
    final StructStat stat = Libcore.os.fstat(fd);
    // Like RAF & other APIs, we assume that the file size fits
    // into a 32 bit integer.
    capacity = (int) stat.st_size;
    if (capacity == 0) {
      unknownLength = true;
      capacity = 8192;
    }
  } catch (ErrnoException exception) {
    closeQuietly(fd);
    throw exception.rethrowAsIOException();
  }
  bytes = new byte[capacity];
}

public FileReader(String absolutePath) throws IOException {
  // We use IoBridge.open because callers might differentiate
  // between a FileNotFoundException and a general IOException.
  //
  // NOTE: This costs us an additional call to fstat(2) to test whether
  // "absolutePath" is a directory or not. We can eliminate it
  // at the cost of copying some code from IoBridge.open.
  try {
    fd = IoBridge.open(absolutePath, O_RDONLY);
  } catch (FileNotFoundException fnfe) {
    throw fnfe;
  }
  int capacity;
  try {
    final StructStat stat = Libcore.os.fstat(fd);
    // Like RAF & other APIs, we assume that the file size fits
    // into a 32 bit integer.
    capacity = (int) stat.st_size;
    if (capacity == 0) {
      unknownLength = true;
      capacity = 8192;
    }
  } catch (ErrnoException exception) {
    closeQuietly(fd);
    throw exception.rethrowAsIOException();
  }
  bytes = new byte[capacity];
}

Javadoc

java.io only throws FileNotFoundException when opening files, regardless of what actually went wrong. Additionally, java.io is more restrictive than POSIX when it comes to opening directories: POSIX says read-only is okay, but java.io doesn't even allow that. We also have an Android-specific hack to alter the default permissions.

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