src/org/sonews/daemon/LineEncoder.java
author František Kučera <franta-hg@frantovo.cz>
Thu Jul 05 13:19:19 2012 +0200 (2012-07-05)
changeset 119 f5b57e221e38
parent 35 ed84c8bdd87b
permissions -rwxr-xr-x
mezery, tabulátory
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/*
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 *   SONEWS News Server
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 *   see AUTHORS for the list of contributors
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 *
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 *   This program is free software: you can redistribute it and/or modify
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 *   it under the terms of the GNU General Public License as published by
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 *   the Free Software Foundation, either version 3 of the License, or
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 *   (at your option) any later version.
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 *
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 *   This program is distributed in the hope that it will be useful,
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 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
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 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 *   GNU General Public License for more details.
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 *
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 *   You should have received a copy of the GNU General Public License
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 *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
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 */
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package org.sonews.daemon;
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import java.nio.ByteBuffer;
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import java.nio.CharBuffer;
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import java.nio.channels.ClosedChannelException;
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import java.nio.charset.Charset;
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import java.nio.charset.CharsetEncoder;
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import java.nio.charset.CoderResult;
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/**
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 * Encodes a line to buffers using the correct charset.
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 * @author Christian Lins
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 * @since sonews/0.5.0
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 */
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class LineEncoder
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{
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	private CharBuffer characters;
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	private Charset charset;
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	/**
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	 * Constructs new LineEncoder.
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	 * @param characters
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	 * @param charset
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	 */
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	public LineEncoder(CharBuffer characters, Charset charset)
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	{
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		this.characters = characters;
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		this.charset = charset;
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	}
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	/**
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	 * Encodes the characters of this instance to the given ChannelLineBuffers
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	 * using the Charset of this instance.
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	 * @param buffer
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	 * @throws java.nio.channels.ClosedChannelException
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	 */
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	public void encode(ChannelLineBuffers buffer)
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		throws ClosedChannelException
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	{
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		CharsetEncoder encoder = charset.newEncoder();
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		while (characters.hasRemaining()) {
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			ByteBuffer buf = ChannelLineBuffers.newLineBuffer();
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			assert buf.position() == 0;
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			assert buf.capacity() >= 512;
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			CoderResult res = encoder.encode(characters, buf, true);
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			// Set limit to current position and current position to 0;
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			// means make ready for read from buffer
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			buf.flip();
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			buffer.addOutputBuffer(buf);
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			if (res.isUnderflow()) // All input processed
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			{
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				break;
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			}
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		}
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	}
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}