/*

  *   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.daemon;

 import java.nio.ByteBuffer;

 import java.nio.CharBuffer;

 import java.nio.channels.ClosedChannelException;

 import java.nio.charset.Charset;

 import java.nio.charset.CharsetEncoder;

 import java.nio.charset.CoderResult;

 /**

  * Encodes a line to buffers using the correct charset.

  * @author Christian Lins

  * @since sonews/0.5.0

  */

 class LineEncoder

 {

 	private CharBuffer characters;

 	private Charset charset;

 	/**

 	 * Constructs new LineEncoder.

 	 * @param characters

 	 * @param charset

 	 */

 	public LineEncoder(CharBuffer characters, Charset charset)

 	{

 		this.characters = characters;

 		this.charset = charset;

 	}

 	/**

 	 * Encodes the characters of this instance to the given ChannelLineBuffers

 	 * using the Charset of this instance.

 	 * @param buffer

 	 * @throws java.nio.channels.ClosedChannelException

 	 */

 	public void encode(ChannelLineBuffers buffer)

 		throws ClosedChannelException

 	{

 		CharsetEncoder encoder = charset.newEncoder();

 		while (characters.hasRemaining()) {

 			ByteBuffer buf = ChannelLineBuffers.newLineBuffer();

 			assert buf.position() == 0;

 			assert buf.capacity() >= 512;

 			CoderResult res = encoder.encode(characters, buf, true);

 			// Set limit to current position and current position to 0;

 			// means make ready for read from buffer

 			buf.flip();

 			buffer.addOutputBuffer(buf);

 			if (res.isUnderflow()) // All input processed

 			{

 				break;

 			}

 		}

 	}

 }