/*
* Created on 21-Jun-2004
* Created by Paul Gardner
* Copyright (C) 2004, 2005, 2006 Aelitis, All Rights Reserved.
*
* This program 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
* of the License, or (at your option) any later version.
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* AELITIS, SAS au capital de 46,603.30 euros
* 8 Allee Lenotre, La Grille Royale, 78600 Le Mesnil le Roi, France.
*
*/
package org.gudy.azureus2.core3.internat;
/**
* @author parg
*
*/
import java.util.*;
import java.io.*;
import java.nio.*;
import java.nio.charset.*;
import org.gudy.azureus2.core3.util.*;
public class
LocaleUtilDecoderReal
implements LocaleUtilDecoder
{
protected CharsetDecoder decoder;
protected int index;
protected
LocaleUtilDecoderReal(
int _index,
CharsetDecoder _decoder )
{
index = _index;
decoder = _decoder;
}
public String
getName()
{
return( decoder.charset().name());
}
public int
getIndex()
{
return( index );
}
public String
tryDecode(
byte[] array,
boolean lax )
{
try{
ByteBuffer bb = ByteBuffer.wrap(array);
CharBuffer cb = CharBuffer.allocate(array.length);
CoderResult cr = decoder.decode(bb,cb, true);
if ( !cr.isError() ){
cb.flip();
String str = cb.toString();
// lax means that as long as the conversion works we consider it usable
// as opposed to strict which requires reverse-conversion equivalence
if ( lax ){
return( str );
}
byte[] b2 = str.getBytes( getName() );
// make sure the conversion is symetric (there are cases where it appears
// to work but in fact converting back to bytes leads to a different
// result
/*
for (int k=0;k<str.length();k++){
System.out.print( Integer.toHexString(str.charAt(k)));
}
System.out.println("");
*/
if ( Arrays.equals( array, b2 )){
return( str );
}
}
return( null );
}catch( Throwable e ){
// Throwable here as we can get "classdefnotfound" + others if the decoder
// isn't available
return( null );
}
}
public String
decodeString(
byte[] bytes )
throws UnsupportedEncodingException
{
if ( bytes == null ){
return( null );
}
ByteBuffer bb = ByteBuffer.wrap(bytes);
CharBuffer cb = CharBuffer.allocate(bytes.length);
CoderResult cr = decoder.decode(bb,cb, true);
try{
if ( !cr.isError() ){
cb.flip();
String str = cb.toString();
byte[] b2 = str.getBytes(decoder.charset().name());
// make sure the conversion is symetric (there are cases where it appears
// to work but in fact converting back to bytes leads to a different
// result
/*
for (int k=0;k<str.length();k++){
System.out.print( Integer.toHexString(str.charAt(k)));
}
System.out.println("");
*/
if ( Arrays.equals( bytes, b2 )){
return( str );
}
}
}catch( Throwable e ){
// Throwable here as we can get "classdefnotfound" + others if the decoder
// isn't available
// ignore
}
try{
// no joy, default
return( new String( bytes, Constants.DEFAULT_ENCODING ));
}catch( UnsupportedEncodingException e ){
Debug.printStackTrace( e );
return( new String( bytes ));
}
}
}
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