/* *  $Id: JxtaSocketOutputStream.java,v 1.6 2004/11/15 19:59:43 hamada Exp $ * *  Copyright (c) 2001 Sun Microsystems, Inc.  All rights reserved. * *  Redistribution and use in source and binary forms, with or without *  modification, are permitted provided that the following conditions *  are met: * *  1. Redistributions of source code must retain the above copyright *  notice, this list of conditions and the following disclaimer. * *  2. Redistributions in binary form must reproduce the above copyright *  notice, this list of conditions and the following disclaimer in *  the documentation and/or other materials provided with the *  distribution. * *  3. The end-user documentation included with the redistribution, *  if any, must include the following acknowledgment: *  "This product includes software developed by the *  Sun Microsystems, Inc. for Project JXTA." *  Alternately, this acknowledgment may appear in the software itself, *  if and wherever such third-party acknowledgments normally appear. * *  4. The names "Sun", "Sun Microsystems, Inc.", "JXTA" and "Project JXTA" must *  not be used to endorse or promote products derived from this *  software without prior written permission. For written *  permission, please contact Project JXTA at http://www.jxta.org. * *  5. Products derived from this software may not be called "JXTA", *  nor may "JXTA" appear in their name, without prior written *  permission of Sun. * *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES *  OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE *  DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR *  ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, *  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT *  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF *  USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND *  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, *  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT *  OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF *  SUCH DAMAGE. *  ==================================================================== * *  This software consists of voluntary contributions made by many *  individuals on behalf of Project JXTA.  For more *  information on Project JXTA, please see *  <http://www.jxta.org/>. * *  This license is based on the BSD license adopted by the Apache Foundation. * */package net.jxta.socket;import java.io.IOException;import java.io.OutputStream;/** *  This class implements a buffered output stream. By setting up such an output *  stream, an application can write bytes to the underlying output stream *  without necessarily causing a call to the underlying system for each byte *  written. Data buffer is flushed to the underlaying stream, when it is full, *  or an explicit call to flush is made. * */public class JxtaSocketOutputStream extends OutputStream {    /**     *  Data buffer     */    protected byte buf[];    /**     *  byte count in buffer     */    protected int count;    /**     *  JxtaSocket associated with this stream     */    protected JxtaSocket socket;    /**     *  Constructor for the JxtaSocketOutputStream object     *     *@param  socket  JxtaSocket associated with this stream     */    public JxtaSocketOutputStream(JxtaSocket socket) {        this(socket, 16384);    }    /**     *  Constructor for the JxtaSocketOutputStream object     *     *@param  socket  JxtaSocket associated with this stream     *@param  size    buffer size in bytes     */    public JxtaSocketOutputStream(JxtaSocket socket, int size) {        if (size <= 0) {            throw new IllegalArgumentException("Buffer size <= 0");        }        buf = new byte[size];        this.socket = socket;    }    /**     *  Flush the internal buffer     *     *@exception  IOException  if an i/o error occurs     */    private void flushBuffer() throws IOException {        if (count > 0) {            // send the message            socket.write(buf, 0, count);            count = 0;        }    }    /**     *  {@inheritDoc}     */    public synchronized void write(int b) throws IOException {        if (count >= buf.length) {            flushBuffer();        }        buf[count++] = (byte) b;    }    /**     *  {@inheritDoc}     */    public synchronized void write(byte b[], int off, int len)  throws IOException {        int left = buf.length - count;        if (len > left) {            System.arraycopy(b, off, buf, count, left);            len -= left;            off += left;            count += left;            flushBuffer();        }        // chunk data if larger than buf.length        while (len >= buf.length) {            socket.write(b, off, buf.length);            len -= buf.length;            off += buf.length;        }        System.arraycopy(b, off, buf, count, len);        count += len;    }    /**     *  {@inheritDoc}     */    public synchronized void flush() throws IOException {        flushBuffer();    }}