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/*
* Firebird Open Source J2ee connector - jdbc driver
*
* Distributable under LGPL license.
* You may obtain a copy of the License at http://www.gnu.org/copyleft/lgpl.html
*
* 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
* LGPL License for more details.
*
* This file was created by members of the firebird development team.
* All individual contributions remain the Copyright (C) of those
* individuals. Contributors to this file are either listed here or
* can be obtained from a CVS history command.
*
* All rights reserved.
*/
/* added by Blas Rodriguez Somoza:
*
* CVS modification log:
* $Log$
* Revision 1.6 2006/06/21 05:39:38 rrokytskyy
* disabled caching
*
* Revision 1.5 2006/06/20 06:34:00 rrokytskyy
* added encoding caching that can be enabled via jaybird.encoding.cache property
*
* Revision 1.4 2004/10/08 22:39:10 rrokytskyy
* added code to solve the issue when database has encoding NONE and there is no chance to control regional settings of the host OS
* added possibility to translate characters if there are some encoding issues
*
* Revision 1.3 2003/06/05 22:36:07 brodsom
* Substitute package and inline imports
*
* Revision 1.2 2003/01/23 01:37:05 brodsom
* Encodings patch
*
*/
package org.firebirdsql.encodings;
import java.io.UnsupportedEncodingException;
public abstract class Encoding_OneByte implements Encoding{
protected static void Initialize(String encoding, char[] byteToChar,
byte[] charToByte) {
Initialize(encoding, byteToChar, charToByte, EncodingFactory.DEFAULT_MAPPING);
}
protected static void Initialize(String encoding, char[] byteToChar,
byte[] charToByte, char[] charMapping) {
byte[] val = new byte[1];
char[] charArray = null;
for (int i=0; i< 256; i++){
val[0] = (byte) i;
try {
charArray = new String(val, 0,1, encoding).toCharArray();
char ch = charArray[0];
byteToChar[i] = charMapping[ch];
charToByte[byteToChar[i]] = (byte) i;
}
catch (UnsupportedEncodingException uee){
uee.printStackTrace();
}
}
}
// encode
public byte[] encodeToCharset(String str){
byte[] result = new byte[str.length()];
encodeToCharset(str.toCharArray(), 0, str.length(), result);
return result;
}
public abstract int encodeToCharset(char[] in, int off, int len, byte[] out);
public int encodeToCharset(byte[] charToByte, char[] in, int off, int len, byte[] out){
for (int i = off; i< off+len; i++)
out[i] = charToByte[in[i]];
return len;
}
// decode from charset
public String decodeFromCharset(byte[] in){
char[] bufferC = new char[in.length];
int length = decodeFromCharset(in, 0, in.length, bufferC);
return new String(bufferC, 0, length);
}
public abstract int decodeFromCharset(byte[] in, int off, int len, char[] out);
public int decodeFromCharset(char[] byteToChar, byte[] in, int off, int len, char[] out){
for (int i = off; i< off+len; i++)
out[i] = byteToChar[(int) in[i] & 0xFF];
return len;
}
}