1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/org/sonews/daemon/LineEncoder.java	Wed Aug 12 16:43:30 2009 +0200
     1.3 @@ -0,0 +1,80 @@
     1.4 +/*
     1.5 + *   SONEWS News Server
     1.6 + *   see AUTHORS for the list of contributors
     1.7 + *
     1.8 + *   This program is free software: you can redistribute it and/or modify
     1.9 + *   it under the terms of the GNU General Public License as published by
    1.10 + *   the Free Software Foundation, either version 3 of the License, or
    1.11 + *   (at your option) any later version.
    1.12 + *
    1.13 + *   This program is distributed in the hope that it will be useful,
    1.14 + *   but WITHOUT ANY WARRANTY; without even the implied warranty of
    1.15 + *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    1.16 + *   GNU General Public License for more details.
    1.17 + *
    1.18 + *   You should have received a copy of the GNU General Public License
    1.19 + *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
    1.20 + */
    1.21 +
    1.22 +package org.sonews.daemon;
    1.23 +
    1.24 +import java.nio.ByteBuffer;
    1.25 +import java.nio.CharBuffer;
    1.26 +import java.nio.channels.ClosedChannelException;
    1.27 +import java.nio.charset.Charset;
    1.28 +import java.nio.charset.CharsetEncoder;
    1.29 +import java.nio.charset.CoderResult;
    1.30 +
    1.31 +/**
    1.32 + * Encodes a line to buffers using the correct charset.
    1.33 + * @author Christian Lins
    1.34 + * @since sonews/0.5.0
    1.35 + */
    1.36 +class LineEncoder
    1.37 +{
    1.38 +
    1.39 +  private CharBuffer    characters;
    1.40 +  private Charset       charset;
    1.41 +  
    1.42 +  /**
    1.43 +   * Constructs new LineEncoder.
    1.44 +   * @param characters
    1.45 +   * @param charset
    1.46 +   */
    1.47 +  public LineEncoder(CharBuffer characters, Charset charset)
    1.48 +  {
    1.49 +    this.characters = characters;
    1.50 +    this.charset    = charset;
    1.51 +  }
    1.52 +  
    1.53 +  /**
    1.54 +   * Encodes the characters of this instance to the given ChannelLineBuffers
    1.55 +   * using the Charset of this instance.
    1.56 +   * @param buffer
    1.57 +   * @throws java.nio.channels.ClosedChannelException
    1.58 +   */
    1.59 +  public void encode(ChannelLineBuffers buffer)
    1.60 +    throws ClosedChannelException
    1.61 +  {
    1.62 +    CharsetEncoder encoder = charset.newEncoder();
    1.63 +    while (characters.hasRemaining())
    1.64 +    {
    1.65 +      ByteBuffer buf = ChannelLineBuffers.newLineBuffer();
    1.66 +      assert buf.position() == 0;
    1.67 +      assert buf.capacity() >= 512;
    1.68 +
    1.69 +      CoderResult res = encoder.encode(characters, buf, true);
    1.70 +
    1.71 +      // Set limit to current position and current position to 0;
    1.72 +      // means make ready for read from buffer
    1.73 +      buf.flip();
    1.74 +      buffer.addOutputBuffer(buf);
    1.75 +
    1.76 +      if (res.isUnderflow()) // All input processed
    1.77 +      {
    1.78 +        break;
    1.79 +      }
    1.80 +    }
    1.81 +  }
    1.82 +  
    1.83 +}