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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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}
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