www.pudn.com > bluecove-1.2.1-src.zip > BluetoothOutputStream.java, change:2007-01-07,size:3246b

/*
 Copyright 2004 Intel Corporation

 This file is part of Blue Cove.

 Blue Cove is free software; you can redistribute it and/or modify
 it under the terms of the GNU Lesser General Public License as published by
 the Free Software Foundation; either version 2.1 of the License, or
 (at your option) any later version.

 Blue Cove 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 Lesser General Public License for more details.

 You should have received a copy of the GNU Lesser General Public License
 along with Blue Cove; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
package com.intel.bluetooth;

import java.io.IOException;
import java.io.OutputStream;

import javax.bluetooth.LocalDevice;

class BluetoothOutputStream extends OutputStream {
	private BluetoothConnection conn;

	public BluetoothOutputStream(BluetoothConnection conn) {
		this.conn = conn;
	}

	/*
	 * Writes the specified byte to this output stream. The general contract for
	 * write is that one byte is written to the output stream. The byte to be
	 * written is the eight low-order bits of the argument b. The 24 high-order
	 * bits of b are ignored. Subclasses of OutputStream must provide an
	 * implementation for this method.
	 * 
	 * Parameters: b - the byte. Throws: IOException - if an I/O error occurs.
	 * In particular, an IOException may be thrown if the output stream has been
	 * closed.
	 */

	public void write(int b) throws IOException {
		if (conn == null)
			throw new IOException();
		else
			(LocalDevice.getLocalDevice()).getBluetoothPeer().send(conn.socket,
					b);
	}

	/*
	 * Writes len bytes from the specified byte array starting at offset off to
	 * this output stream. The general contract for write(b, off, len) is that
	 * some of the bytes in the array b are written to the output stream in
	 * order; element b[off] is the first byte written and b[off+len-1] is the
	 * last byte written by this operation. The write method of OutputStream
	 * calls the write method of one argument on each of the bytes to be written
	 * out. Subclasses are encouraged to override this method and provide a more
	 * efficient implementation.
	 * 
	 * If b is null, a NullPointerException is thrown.
	 * 
	 * If off is negative, or len is negative, or off+len is greater than the
	 * length of the array b, then an IndexOutOfBoundsException is thrown.
	 * 
	 * Parameters: b - the data. off - the start offset in the data. len - the
	 * number of bytes to write. Throws: IOException - if an I/O error occurs.
	 * In particular, an IOException is thrown if the output stream is closed.
	 */
	public void write(byte[] b, int off, int len) throws IOException {
		if (off  0 || len  0 || off + len > b.length) {
			throw new IndexOutOfBoundsException();
		}

		if (conn == null) {
			throw new IOException();
		} else {
			(LocalDevice.getLocalDevice()).getBluetoothPeer().send(conn.socket,
					b, off, len);
		}
	}

	public void close() throws IOException {
		if (conn != null) {
			conn.out = null;

			conn.closeSocket();

			conn = null;
		}
	}
}