chris@1: /*
chris@1:  *   SONEWS News Server
chris@1:  *   see AUTHORS for the list of contributors
chris@1:  *
chris@1:  *   This program is free software: you can redistribute it and/or modify
chris@1:  *   it under the terms of the GNU General Public License as published by
chris@1:  *   the Free Software Foundation, either version 3 of the License, or
chris@1:  *   (at your option) any later version.
chris@1:  *
chris@1:  *   This program is distributed in the hope that it will be useful,
chris@1:  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
chris@1:  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
chris@1:  *   GNU General Public License for more details.
chris@1:  *
chris@1:  *   You should have received a copy of the GNU General Public License
chris@1:  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
chris@1:  */
chris@1: package org.sonews.util.io;
chris@1: 
chris@1: import java.io.ByteArrayOutputStream;
chris@1: import java.io.IOException;
chris@1: import java.io.InputStream;
chris@1: import java.io.UnsupportedEncodingException;
chris@3: import org.sonews.storage.Article;
chris@1: 
chris@1: /**
chris@1:  * Capsulates an Article to provide a raw InputStream.
chris@1:  * @author Christian Lins
chris@1:  * @since sonews/0.5.0
chris@1:  */
cli@42: public class ArticleInputStream extends InputStream {
chris@1: 
cli@37: 	private byte[] buf;
cli@37: 	private int pos = 0;
chris@3: 
cli@37: 	public ArticleInputStream(final Article art)
cli@42: 			throws IOException, UnsupportedEncodingException {
cli@37: 		final ByteArrayOutputStream out = new ByteArrayOutputStream();
cli@37: 		out.write(art.getHeaderSource().getBytes("UTF-8"));
cli@37: 		out.write("\r\n\r\n".getBytes());
cli@37: 		out.write(art.getBody()); // Without CRLF
cli@37: 		out.flush();
cli@37: 		this.buf = out.toByteArray();
cli@37: 	}
cli@37: 
cli@37: 	/**
cli@37: 	 * This method reads one byte from the stream.  The <code>pos</code>
cli@37: 	 * counter is advanced to the next byte to be read.  The byte read is
cli@37: 	 * returned as an int in the range of 0-255.  If the stream position
cli@37: 	 * is already at the end of the buffer, no byte is read and a -1 is
cli@37: 	 * returned in order to indicate the end of the stream.
cli@37: 	 *
cli@37: 	 * @return The byte read, or -1 if end of stream
cli@37: 	 */
cli@37: 	@Override
cli@42: 	public synchronized int read() {
cli@37: 		if (pos < buf.length) {
cli@37: 			return ((int) buf[pos++]) & 0xFF;
cli@37: 		} else {
cli@37: 			return -1;
cli@37: 		}
cli@37: 	}
chris@1: }