Convert byte array to string
/*
Copyright (C) 2002 MySQL AB
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
*/
import java.io.UnsupportedEncodingException;
/**
* Various utility methods for converting to/from byte
* arrays in the platform encoding
*
* @author Mark Matthews
*/
public class StringUtils {
//~ Instance/static variables .............................................
private static final int BYTE_RANGE = (1 + Byte.MAX_VALUE)
- Byte.MIN_VALUE;
private static byte[] allBytes = new byte[BYTE_RANGE];
private static char[] byteToChars = new char[BYTE_RANGE];
//~ Initializers ..........................................................
static {
for (int i = Byte.MIN_VALUE; i <= Byte.MAX_VALUE; i++) {
allBytes[i - Byte.MIN_VALUE] = (byte) i;
}
String allBytesString = new String(allBytes, 0,
Byte.MAX_VALUE - Byte.MIN_VALUE);
for (int i = 0; i < (Byte.MAX_VALUE - Byte.MIN_VALUE); i++) {
byteToChars[i] = allBytesString.charAt(i);
}
}
/**
* DOCUMENT ME!
*
* @param buffer DOCUMENT ME!
* @param startPos DOCUMENT ME!
* @param length DOCUMENT ME!
* @return DOCUMENT ME!
*/
public static final String toAsciiString3(byte[] buffer, int startPos,
int length) {
char[] charArray = new char[length];
int readpoint = startPos;
for (int i = 0; i < length; i++) {
charArray[i] = byteToChars[(int) buffer[readpoint]
- Byte.MIN_VALUE];
readpoint++;
}
return new String(charArray);
}
/**
* DOCUMENT ME!
*
* @param buffer DOCUMENT ME!
* @return DOCUMENT ME!
*/
public static final String toAsciiString(byte[] buffer) {
return toAsciiString3(buffer, 0, buffer.length);
}
/**
* DOCUMENT ME!
*
* @param buffer DOCUMENT ME!
* @param startPos DOCUMENT ME!
* @param length DOCUMENT ME!
* @return DOCUMENT ME!
*/
public static final String toAsciiString2(byte[] buffer, int startPos,
int length) {
return new String(buffer, startPos, length);
}
/**
* DOCUMENT ME!
*
* @param buffer DOCUMENT ME!
* @param startPos DOCUMENT ME!
* @param length DOCUMENT ME!
* @return DOCUMENT ME!
*/
public static final String toAsciiString(byte[] buffer, int startPos,
int length) {
StringBuffer result = new StringBuffer();
int endPoint = startPos + length;
for (int i = startPos; i < endPoint; i++) {
result.append(byteToChars[(int) buffer[i] - Byte.MIN_VALUE]);
}
return result.toString();
}
}
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