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: 
chris@1: package org.sonews.daemon;
chris@1: 
chris@1: import java.nio.ByteBuffer;
chris@1: import java.nio.CharBuffer;
chris@1: import java.nio.channels.ClosedChannelException;
chris@1: import java.nio.charset.Charset;
chris@1: import java.nio.charset.CharsetEncoder;
chris@1: import java.nio.charset.CoderResult;
chris@1: 
chris@1: /**
chris@1:  * Encodes a line to buffers using the correct charset.
chris@1:  * @author Christian Lins
chris@1:  * @since sonews/0.5.0
chris@1:  */
chris@1: class LineEncoder
chris@1: {
chris@1: 
cli@37: 	private CharBuffer characters;
cli@37: 	private Charset charset;
chris@1: 
cli@37: 	/**
cli@37: 	 * Constructs new LineEncoder.
cli@37: 	 * @param characters
cli@37: 	 * @param charset
cli@37: 	 */
cli@37: 	public LineEncoder(CharBuffer characters, Charset charset)
cli@37: 	{
cli@37: 		this.characters = characters;
cli@37: 		this.charset = charset;
cli@37: 	}
chris@1: 
cli@37: 	/**
cli@37: 	 * Encodes the characters of this instance to the given ChannelLineBuffers
cli@37: 	 * using the Charset of this instance.
cli@37: 	 * @param buffer
cli@37: 	 * @throws java.nio.channels.ClosedChannelException
cli@37: 	 */
cli@37: 	public void encode(ChannelLineBuffers buffer)
cli@37: 		throws ClosedChannelException
cli@37: 	{
cli@37: 		CharsetEncoder encoder = charset.newEncoder();
cli@37: 		while (characters.hasRemaining()) {
cli@37: 			ByteBuffer buf = ChannelLineBuffers.newLineBuffer();
cli@37: 			assert buf.position() == 0;
cli@37: 			assert buf.capacity() >= 512;
chris@1: 
cli@37: 			CoderResult res = encoder.encode(characters, buf, true);
cli@37: 
cli@37: 			// Set limit to current position and current position to 0;
cli@37: 			// means make ready for read from buffer
cli@37: 			buf.flip();
cli@37: 			buffer.addOutputBuffer(buf);
cli@37: 
cli@37: 			if (res.isUnderflow()) // All input processed
cli@37: 			{
cli@37: 				break;
cli@37: 			}
cli@37: 		}
cli@37: 	}
chris@1: }