/*
* Copyright (c) 2001-2004 Caucho Technology, Inc. All rights reserved.
*
* The Apache Software License, Version 1.1
*
* 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 acknowlegement:
* "This product includes software developed by the
* Caucho Technology (http://www.caucho.com/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "Hessian", "Resin", and "Caucho" must not be used to
* endorse or promote products derived from this software without prior
* written permission. For written permission, please contact
* info@caucho.com.
*
* 5. Products derived from this software may not be called "Resin"
* nor may "Resin" appear in their names without prior written
* permission of Caucho Technology.
*
* 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 CAUCHO TECHNOLOGY 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.
*
* @author Scott Ferguson
*/
package com.caucho.hessian.mux;
import java.io.IOException;
import java.io.OutputStream;
/**
* Output stream to a specific channel.
*/
public class MuxOutputStream extends OutputStream {
private MuxServer server;
private int channel;
private OutputStream os;
/**
* Null argument constructor.
*/
public MuxOutputStream()
{
}
/**
* Initialize the multiplexor with input and output streams.
*/
protected void init(MuxServer server, int channel)
throws IOException
{
this.server = server;
this.channel = channel;
this.os = null;
}
/**
* Gets the raw output stream. Clients will normally not call
* this.
*/
protected OutputStream getOutputStream()
throws IOException
{
if (os == null && server != null)
os = server.writeChannel(channel);
return os;
}
/**
* Gets the channel of the connection.
*/
public int getChannel()
{
return channel;
}
/**
* Writes a URL to the stream.
*/
public void writeURL(String url)
throws IOException
{
writeUTF('U', url);
}
/**
* Writes a data byte to the output stream.
*/
public void write(int ch)
throws IOException
{
OutputStream os = getOutputStream();
os.write('D');
os.write(0);
os.write(1);
os.write(ch);
}
/**
* Writes data to the output stream.
*/
public void write(byte []buffer, int offset, int length)
throws IOException
{
OutputStream os = getOutputStream();
for (; length > 0x8000; length -= 0x8000) {
os.write('D');
os.write(0x80);
os.write(0x00);
os.write(buffer, offset, 0x8000);
offset += 0x8000;
}
os.write('D');
os.write(length >> 8);
os.write(length);
os.write(buffer, offset, length);
}
/**
* Flush data to the output stream.
*/
public void yield()
throws IOException
{
OutputStream os = this.os;
this.os = null;
if (os != null)
server.yield(channel);
}
/**
* Flush data to the output stream.
*/
public void flush()
throws IOException
{
OutputStream os = this.os;
this.os = null;
if (os != null)
server.flush(channel);
}
/**
* Complete writing to the stream, closing the channel.
*/
public void close()
throws IOException
{
if (server != null) {
OutputStream os = getOutputStream();
this.os = null;
MuxServer server = this.server;
this.server = null;
server.close(channel);
}
}
/**
* Writes a UTF-8 string.
*
* @param code the HMUX code identifying the string
* @param string the string to write
*/
protected void writeUTF(int code, String string)
throws IOException
{
OutputStream os = getOutputStream();
os.write(code);
int charLength = string.length();
int length = 0;
for (int i = 0; i < charLength; i++) {
char ch = string.charAt(i);
if (ch < 0x80)
length++;
else if (ch < 0x800)
length += 2;
else
length += 3;
}
os.write(length >> 8);
os.write(length);
for (int i = 0; i < length; i++) {
char ch = string.charAt(i);
if (ch < 0x80)
os.write(ch);
else if (ch < 0x800) {
os.write(0xc0 + (ch >> 6) & 0x1f);
os.write(0x80 + (ch & 0x3f));
}
else {
os.write(0xe0 + (ch >> 12) & 0xf);
os.write(0x80 + ((ch >> 6) & 0x3f));
os.write(0x80 + (ch & 0x3f));
}
}
}
}