/*

  *   SONEWS News Server

  *   see AUTHORS for the list of contributors

  *

  *   This program is free software: you can redistribute it and/or modify

  *   it under the terms of the GNU General Public License as published by

  *   the Free Software Foundation, either version 3 of the License, or

  *   (at your option) any later version.

  *

  *   This program 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 General Public License for more details.

  *

  *   You should have received a copy of the GNU General Public License

  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.

  */

 package org.sonews.util.io;

 import java.io.ByteArrayOutputStream;

 import java.io.IOException;

 import java.io.InputStream;

 import java.io.UnsupportedEncodingException;

 import org.sonews.storage.Article;

 /**

  * Capsulates an Article to provide a raw InputStream.

  * @author Christian Lins

  * @since sonews/0.5.0

  */

 public class ArticleInputStream extends InputStream

 {

   private byte[] buf;

   private int    pos = 0;

   public ArticleInputStream(final Article art)

     throws IOException, UnsupportedEncodingException

   {

     final ByteArrayOutputStream out = new ByteArrayOutputStream();

     out.write(art.getHeaderSource().getBytes("UTF-8"));

     out.write("\r\n\r\n".getBytes());

     out.write(art.getBody()); // Without CRLF

     out.flush();

     this.buf = out.toByteArray();

   }

   /**

    * This method reads one byte from the stream.  The <code>pos</code>

    * counter is advanced to the next byte to be read.  The byte read is

    * returned as an int in the range of 0-255.  If the stream position

    * is already at the end of the buffer, no byte is read and a -1 is

    * returned in order to indicate the end of the stream.

    *

    * @return The byte read, or -1 if end of stream

    */

   @Override

   public synchronized int read()

   {

     if(pos < buf.length)

     {

       return ((int)buf[pos++]) & 0xFF;

     }

     else

     {

       return -1;

     }

   }

 }