/* CharsetDecoder.java --
   Copyright (C) 2002 Free Software Foundation, Inc.
 
This file is part of GNU Classpath.
 
GNU Classpath 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 2, or (at your option)
any later version.
 
GNU Classpath 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 GNU Classpath; see the file COPYING.  If not, write to the
Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA.
 
Linking this library statically or dynamically with other modules is
making a combined work based on this library.  Thus, the terms and
conditions of the GNU General Public License cover the whole
combination.
 
As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent
modules, and to copy and distribute the resulting executable under
terms of your choice, provided that you also meet, for each linked
independent module, the terms and conditions of the license of that
module.  An independent module is a module which is not derived from
or based on this library.  If you modify this library, you may extend
this exception to your version of the library, but you are not
obligated to do so.  If you do not wish to do so, delete this
exception statement from your version. */

package java.nio.charset;

import java.nio.*;

public abstract class CharsetDecoder
{
  Charset cs;
  float averageCharsPerByte;
  float maxCharsPerByte;
  String repl;

  protected CharsetDecoder(Charset cs,
                           float averageCharsPerByte,
                           float maxCharsPerByte)
  {
    this.cs = cs;
    this.averageCharsPerByte = averageCharsPerByte;
    this.maxCharsPerByte     = maxCharsPerByte;
  }

  public float averageCharsPerByte()
  {
    return averageCharsPerByte;
  }

  public Charset charset()
  {
    return cs;
  }

  public CharBuffer decode(ByteBuffer in)
  {
    CharBuffer x = CharBuffer.allocate(in.remaining());
    decode(in, x, false);
    x.rewind();
    return x;
  }

  public CoderResult decode(ByteBuffer in, CharBuffer out, boolean endOfInput)
  {
    return decodeLoop(in,out);
  }

  protected abstract  CoderResult decodeLoop(ByteBuffer in, CharBuffer out);

  public Charset detectedCharset()
  {
    return charset();
  }

  public CoderResult flush(CharBuffer out)
  {
    return implFlush(out);
  }
  protected  CoderResult implFlush(CharBuffer out)
  {
    return null;
  }
  protected  void implOnMalformedInput(CodingErrorAction newAction)
  {}
  protected  void implOnUnmappableCharacter(CodingErrorAction newAction)
  {}
  protected  void implReplaceWith(String newReplacement)
  {}
  protected  void implReset()
  {}

  public boolean isAutoDetecting()
  {
    return true;
  }

  public boolean isCharsetDetected()
  {
    return true;
  }
  public CodingErrorAction malformedInputAction()
  {
    return null;
  }
  public float maxCharsPerByte()
  {
    return maxCharsPerByte;
  }
  public CharsetDecoder onMalformedInput(CodingErrorAction newAction)
  {
    return null;
  }
  public CharsetDecoder onUnmappableCharacter(CodingErrorAction newAction)
  {
    return null;
  }
  public String replacement()
  {
    return repl;
  }

  public CharsetDecoder replaceWith(String newReplacement)
  {
    return null;
  }

  public CharsetDecoder reset()
  {
    return null;
  }

  public CodingErrorAction unmappableCharacterAction()
  {
    return null;
  }
}