/*
 * The Apache Software License, Version 1.1
 *
 *
 * Copyright (c) 2001-2003 The Apache Software Foundation.  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
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Axis" and "Apache Software Foundation" must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written
 *    permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache",
 *    nor may "Apache" appear in their name, without prior written
 *    permission of the Apache Software Foundation.
 *
 * 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 the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */
package org.jboss.axis.transport.http;


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


/**
 * @author Rick Rineholt
 */
public class ChunkedOutputStream extends FilterOutputStream
{

   boolean eos = false;

   private ChunkedOutputStream()
   {
      super(null);
   }

   public ChunkedOutputStream(OutputStream os)
   {
      super(os);
   }

   public void write(int b)
           throws IOException
   {
      write(new byte[]{(byte)b}, 0, 1);
   }

   public void write(byte[] b)

           throws IOException
   {
      write(b, 0, b.length);
   }

   static final byte[] crlf = "\r\n".getBytes();

   public void write(byte[] b,
                     int off,
                     int len)
           throws IOException
   {
      if (len == 0) return;

      out.write((Integer.toHexString(len)).getBytes());
      out.write(crlf);
      out.write(b, off, len);
      out.write(crlf);
   }

   /*
    public void flush()
    throws IOException {
    out.flush();
    }
    */

   public void eos() throws IOException
   {
      synchronized (this)
      {
         if (eos) return;
         eos = true;
      }
      out.write("0\r\n\r\n".getBytes());
      out.flush();
   }

   public void close()
           throws IOException
   {
      eos();
      out.close();
   }

}