/*
Copyright (c) 2002, 2012, Oracle and/or its affiliates. All rights reserved.
The MySQL Connector/J is licensed under the terms of the GPLv2
<http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>, like most MySQL Connectors.
There are special exceptions to the terms and conditions of the GPLv2 as it is applied to
this software, see the FLOSS License Exception
<http://www.mysql.com/about/legal/licensing/foss-exception.html>.
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; version 2
of the License.
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., 51 Franklin St, Fifth
Floor, Boston, MA 02110-1301 USA
*/
package com.mysql.jdbc;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.StringReader;
import java.io.UnsupportedEncodingException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.math.BigDecimal;
import java.nio.ByteBuffer;
import java.nio.charset.Charset;
import java.nio.charset.IllegalCharsetNameException;
import java.nio.charset.UnsupportedCharsetException;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import java.util.StringTokenizer;
import java.util.concurrent.ConcurrentHashMap;
/**
* Various utility methods for converting to/from byte arrays in the platform
* encoding
*
* @author Mark Matthews
*/
public class StringUtils {
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];
private static Method toPlainStringMethod;
static final int WILD_COMPARE_MATCH_NO_WILD = 0;
static final int WILD_COMPARE_MATCH_WITH_WILD = 1;
static final int WILD_COMPARE_NO_MATCH = -1;
private static final ConcurrentHashMap<String,Charset> charsetsByAlias =
new ConcurrentHashMap<String,Charset>();
private static final String platformEncoding = System.getProperty("file.encoding");
private static final String VALID_ID_CHARS = "abcdefghijklmnopqrstuvwxyzABCDEFGHIGKLMNOPQRSTUVWXYZ0123456789$_#@";
static Charset findCharset(String alias) throws UnsupportedEncodingException {
try {
Charset cs = charsetsByAlias.get(alias);
if (cs == null) {
cs = Charset.forName(alias);
charsetsByAlias.putIfAbsent(alias, cs);
}
return cs;
// We re-throw these runtimes for compatibility with java.io
} catch (UnsupportedCharsetException uce) {
throw new UnsupportedEncodingException(alias);
} catch (IllegalCharsetNameException icne) {
throw new UnsupportedEncodingException(alias);
} catch (IllegalArgumentException iae) {
throw new UnsupportedEncodingException(alias);
}
}
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);
int allBytesStringLen = allBytesString.length();
for (int i = 0; (i < (Byte.MAX_VALUE - Byte.MIN_VALUE))
&& (i < allBytesStringLen); i++) {
byteToChars[i] = allBytesString.charAt(i);
}
try {
toPlainStringMethod = BigDecimal.class.getMethod("toPlainString",
new Class[0]);
} catch (NoSuchMethodException nsme) {
// that's okay, we fallback to .toString()
}
}
/**
* Takes care of the fact that Sun changed the output of
* BigDecimal.toString() between JDK-1.4 and JDK 5
*
* @param decimal
* the big decimal to stringify
*
* @return a string representation of 'decimal'
*/
public static String consistentToString(BigDecimal decimal) {
if (decimal == null) {
return null;
}
if (toPlainStringMethod != null) {
try {
return (String) toPlainStringMethod.invoke(decimal, (Object[])null);
} catch (InvocationTargetException invokeEx) {
// that's okay, we fall-through to decimal.toString()
} catch (IllegalAccessException accessEx) {
// that's okay, we fall-through to decimal.toString()
}
}
return decimal.toString();
}
/**
* Dumps the given bytes to STDOUT as a hex dump (up to length bytes).
*
* @param byteBuffer
* the data to print as hex
* @param length
* the number of bytes to print
*
* @return ...
*/
public static final String dumpAsHex(byte[] byteBuffer, int length) {
StringBuffer outputBuf = new StringBuffer(length * 4);
int p = 0;
int rows = length / 8;
for (int i = 0; (i < rows) && (p < length); i++) {
int ptemp = p;
for (int j = 0; j < 8; j++) {
String hexVal = Integer.toHexString(byteBuffer[ptemp] & 0xff);
if (hexVal.length() == 1) {
hexVal = "0" + hexVal; //$NON-NLS-1$
}
outputBuf.append(hexVal + " "); //$NON-NLS-1$
ptemp++;
}
outputBuf.append(" "); //$NON-NLS-1$
for (int j = 0; j < 8; j++) {
int b = 0xff & byteBuffer[p];
if (b > 32 && b < 127) {
outputBuf.append((char) b + " "); //$NON-NLS-1$
} else {
outputBuf.append(". "); //$NON-NLS-1$
}
p++;
}
outputBuf.append("\n"); //$NON-NLS-1$
}
int n = 0;
for (int i = p; i < length; i++) {
String hexVal = Integer.toHexString(byteBuffer[i] & 0xff);
if (hexVal.length() == 1) {
hexVal = "0" + hexVal; //$NON-NLS-1$
}
outputBuf.append(hexVal + " "); //$NON-NLS-1$
n++;
}
for (int i = n; i < 8; i++) {
outputBuf.append(" "); //$NON-NLS-1$
}
outputBuf.append(" "); //$NON-NLS-1$
for (int i = p; i < length; i++) {
int b = 0xff & byteBuffer[i];
if (b > 32 && b < 127) {
outputBuf.append((char) b + " "); //$NON-NLS-1$
} else {
outputBuf.append(". "); //$NON-NLS-1$
}
}
outputBuf.append("\n"); //$NON-NLS-1$
return outputBuf.toString();
}
private static boolean endsWith(byte[] dataFrom, String suffix) {
for (int i = 1; i <= suffix.length(); i++) {
int dfOffset = dataFrom.length - i;
int suffixOffset = suffix.length() - i;
if (dataFrom[dfOffset] != suffix.charAt(suffixOffset)) {
return false;
}
}
return true;
}
/**
* Unfortunately, SJIS has 0x5c as a high byte in some of its double-byte
* characters, so we need to escape it.
*
* @param origBytes
* the original bytes in SJIS format
* @param origString
* the string that had .getBytes() called on it
* @param offset
* where to start converting from
* @param length
* how many characters to convert.
*
* @return byte[] with 0x5c escaped
*/
public static byte[] escapeEasternUnicodeByteStream(byte[] origBytes,
String origString, int offset, int length) {
if ((origBytes == null) || (origBytes.length == 0)) {
return origBytes;
}
int bytesLen = origBytes.length;
int bufIndex = 0;
int strIndex = 0;
ByteArrayOutputStream bytesOut = new ByteArrayOutputStream(bytesLen);
while (true) {
if (origString.charAt(strIndex) == '\\') {
// write it out as-is
bytesOut.write(origBytes[bufIndex++]);
// bytesOut.write(origBytes[bufIndex++]);
} else {
// Grab the first byte
int loByte = origBytes[bufIndex];
if (loByte < 0) {
loByte += 256; // adjust for signedness/wrap-around
}
// We always write the first byte
bytesOut.write(loByte);
//
// The codepage characters in question exist between
// 0x81-0x9F and 0xE0-0xFC...
//
// See:
//
// http://www.microsoft.com/GLOBALDEV/Reference/dbcs/932.htm
//
// Problematic characters in GBK
//
// U+905C : CJK UNIFIED IDEOGRAPH
//
// Problematic characters in Big5
//
// B9F0 = U+5C62 : CJK UNIFIED IDEOGRAPH
//
if (loByte >= 0x80) {
if (bufIndex < (bytesLen - 1)) {
int hiByte = origBytes[bufIndex + 1];
if (hiByte < 0) {
hiByte += 256; // adjust for signedness/wrap-around
}
// write the high byte here, and increment the index
// for the high byte
bytesOut.write(hiByte);
bufIndex++;
// escape 0x5c if necessary
if (hiByte == 0x5C) {
bytesOut.write(hiByte);
}
}
} else if (loByte == 0x5c) {
if (bufIndex < (bytesLen - 1)) {
int hiByte = origBytes[bufIndex + 1];
if (hiByte < 0) {
hiByte += 256; // adjust for signedness/wrap-around
}
if (hiByte == 0x62) {
// we need to escape the 0x5c
bytesOut.write(0x5c);
bytesOut.write(0x62);
bufIndex++;
}
}
}
bufIndex++;
}
if (bufIndex >= bytesLen) {
// we're done
break;
}
strIndex++;
}
return bytesOut.toByteArray();
}
/**
* Returns the first non whitespace char, converted to upper case
*
* @param searchIn
* the string to search in
*
* @return the first non-whitespace character, upper cased.
*/
public static char firstNonWsCharUc(String searchIn) {
return firstNonWsCharUc(searchIn, 0);
}
public static char firstNonWsCharUc(String searchIn, int startAt) {
if (searchIn == null) {
return 0;
}
int length = searchIn.length();
for (int i = startAt; i < length; i++) {
char c = searchIn.charAt(i);
if (!Character.isWhitespace(c)) {
return Character.toUpperCase(c);
}
}
return 0;
}
public static char firstAlphaCharUc(String searchIn, int startAt) {
if (searchIn == null) {
return 0;
}
int length = searchIn.length();
for (int i = startAt; i < length; i++) {
char c = searchIn.charAt(i);
if (Character.isLetter(c)) {
return Character.toUpperCase(c);
}
}
return 0;
}
/**
* Adds '+' to decimal numbers that are positive (MySQL doesn't understand
* them otherwise
*
* @param dString
* The value as a string
*
* @return String the string with a '+' added (if needed)
*/
public static final String fixDecimalExponent(String dString) {
int ePos = dString.indexOf("E"); //$NON-NLS-1$
if (ePos == -1) {
ePos = dString.indexOf("e"); //$NON-NLS-1$
}
if (ePos != -1) {
if (dString.length() > (ePos + 1)) {
char maybeMinusChar = dString.charAt(ePos + 1);
if (maybeMinusChar != '-' && maybeMinusChar != '+') {
StringBuffer buf = new StringBuffer(dString.length() + 1);
buf.append(dString.substring(0, ePos + 1));
buf.append('+');
buf.append(dString.substring(ePos + 1, dString.length()));
dString = buf.toString();
}
}
}
return dString;
}
public static final byte[] getBytes(char[] c,
SingleByteCharsetConverter converter, String encoding,
String serverEncoding, boolean parserKnowsUnicode, ExceptionInterceptor exceptionInterceptor)
throws SQLException {
try {
byte[] b = null;
if (converter != null) {
b = converter.toBytes(c);
} else if (encoding == null) {
b = new String(c).getBytes();
} else {
String s = new String(c);
b = s.getBytes(encoding);
if (!parserKnowsUnicode && (encoding.equalsIgnoreCase("SJIS") //$NON-NLS-1$
|| encoding.equalsIgnoreCase("BIG5") //$NON-NLS-1$
|| encoding.equalsIgnoreCase("GBK"))) { //$NON-NLS-1$
if (!encoding.equalsIgnoreCase(serverEncoding)) {
b = escapeEasternUnicodeByteStream(b, s, 0, s.length());
}
}
}
return b;
} catch (UnsupportedEncodingException uee) {
throw SQLError.createSQLException(Messages.getString("StringUtils.5") //$NON-NLS-1$
+ encoding + Messages.getString("StringUtils.6"),
SQLError.SQL_STATE_ILLEGAL_ARGUMENT, exceptionInterceptor); //$NON-NLS-1$
}
}
public static final byte[] getBytes(char[] c,
SingleByteCharsetConverter converter, String encoding,
String serverEncoding, int offset, int length,
boolean parserKnowsUnicode, ExceptionInterceptor exceptionInterceptor) throws SQLException {
try {
byte[] b = null;
if (converter != null) {
b = converter.toBytes(c, offset, length);
} else if (encoding == null) {
byte[] temp = new String(c, offset, length).getBytes();
length = temp.length;
b = new byte[length];
System.arraycopy(temp, 0, b, 0, length);
} else {
String s = new String(c, offset, length);
byte[] temp = s.getBytes(encoding);
length = temp.length;
b = new byte[length];
System.arraycopy(temp, 0, b, 0, length);
if (!parserKnowsUnicode && (encoding.equalsIgnoreCase("SJIS") //$NON-NLS-1$
|| encoding.equalsIgnoreCase("BIG5") //$NON-NLS-1$
|| encoding.equalsIgnoreCase("GBK"))) { //$NON-NLS-1$
if (!encoding.equalsIgnoreCase(serverEncoding)) {
b = escapeEasternUnicodeByteStream(b, s, offset, length);
}
}
}
return b;
} catch (UnsupportedEncodingException uee) {
throw SQLError.createSQLException(Messages.getString("StringUtils.10") //$NON-NLS-1$
+ encoding + Messages.getString("StringUtils.11"),
SQLError.SQL_STATE_ILLEGAL_ARGUMENT, exceptionInterceptor); //$NON-NLS-1$
}
}
public static final byte[] getBytes(char[] c, String encoding,
String serverEncoding, boolean parserKnowsUnicode,
MySQLConnection conn, ExceptionInterceptor exceptionInterceptor)
throws SQLException {
try {
SingleByteCharsetConverter converter = null;
if (conn != null) {
converter = conn.getCharsetConverter(encoding);
} else {
converter = SingleByteCharsetConverter.getInstance(encoding, null);
}
return getBytes(c, converter, encoding, serverEncoding,
parserKnowsUnicode, exceptionInterceptor);
} catch (UnsupportedEncodingException uee) {
throw SQLError.createSQLException(Messages.getString("StringUtils.0") //$NON-NLS-1$
+ encoding + Messages.getString("StringUtils.1"),
SQLError.SQL_STATE_ILLEGAL_ARGUMENT, exceptionInterceptor); //$NON-NLS-1$
}
}
/**
* Returns the byte[] representation of the given string (re)using the given
* charset converter, and the given encoding.
*
* @param s
* the string to convert
* @param converter
* the converter to reuse
* @param encoding
* the character encoding to use
* @param serverEncoding
* DOCUMENT ME!
* @param parserKnowsUnicode
* DOCUMENT ME!
*
* @return byte[] representation of the string
*
* @throws SQLException
* if an encoding unsupported by the JVM is supplied.
*/
public static final byte[] getBytes(String s,
SingleByteCharsetConverter converter, String encoding,
String serverEncoding, boolean parserKnowsUnicode, ExceptionInterceptor exceptionInterceptor)
throws SQLException {
try {
byte[] b = null;
if (converter != null) {
b = converter.toBytes(s);
} else if (encoding == null) {
b = s.getBytes();
} else {
b = s.getBytes(encoding);
if (!parserKnowsUnicode && (encoding.equalsIgnoreCase("SJIS") //$NON-NLS-1$
|| encoding.equalsIgnoreCase("BIG5") //$NON-NLS-1$
|| encoding.equalsIgnoreCase("GBK"))) { //$NON-NLS-1$
if (!encoding.equalsIgnoreCase(serverEncoding)) {
b = escapeEasternUnicodeByteStream(b, s, 0, s.length());
}
}
}
return b;
} catch (UnsupportedEncodingException uee) {
throw SQLError.createSQLException(Messages.getString("StringUtils.5") //$NON-NLS-1$
+ encoding + Messages.getString("StringUtils.6"),
SQLError.SQL_STATE_ILLEGAL_ARGUMENT, exceptionInterceptor); //$NON-NLS-1$
}
}
public static final byte[] getBytesWrapped(String s, char beginWrap, char endWrap,
SingleByteCharsetConverter converter, String encoding,
String serverEncoding, boolean parserKnowsUnicode, ExceptionInterceptor exceptionInterceptor)
throws SQLException {
try {
byte[] b = null;
if (converter != null) {
b = converter.toBytesWrapped(s, beginWrap, endWrap);
} else if (encoding == null) {
StringBuffer buf = new StringBuffer(s.length() + 2);
buf.append(beginWrap);
buf.append(s);
buf.append(endWrap);
b = buf.toString().getBytes();
} else {
StringBuffer buf = new StringBuffer(s.length() + 2);
buf.append(beginWrap);
buf.append(s);
buf.append(endWrap);
s = buf.toString();
b = s.getBytes(encoding);
if (!parserKnowsUnicode && (encoding.equalsIgnoreCase("SJIS") //$NON-NLS-1$
|| encoding.equalsIgnoreCase("BIG5") //$NON-NLS-1$
|| encoding.equalsIgnoreCase("GBK"))) { //$NON-NLS-1$
if (!encoding.equalsIgnoreCase(serverEncoding)) {
b = escapeEasternUnicodeByteStream(b, s, 0, s.length());
}
}
}
return b;
} catch (UnsupportedEncodingException uee) {
throw SQLError.createSQLException(Messages.getString("StringUtils.5") //$NON-NLS-1$
+ encoding + Messages.getString("StringUtils.6"),
SQLError.SQL_STATE_ILLEGAL_ARGUMENT, exceptionInterceptor); //$NON-NLS-1$
}
}
/**
* DOCUMENT ME!
*
* @param s
* DOCUMENT ME!
* @param converter
* DOCUMENT ME!
* @param encoding
* DOCUMENT ME!
* @param serverEncoding
* DOCUMENT ME!
* @param offset
* DOCUMENT ME!
* @param length
* DOCUMENT ME!
* @param parserKnowsUnicode
* DOCUMENT ME!
*
* @return DOCUMENT ME!
*
* @throws SQLException
* DOCUMENT ME!
*/
public static final byte[] getBytes(String s,
SingleByteCharsetConverter converter, String encoding,
String serverEncoding, int offset, int length,
boolean parserKnowsUnicode, ExceptionInterceptor exceptionInterceptor) throws SQLException {
try {
byte[] b = null;
if (converter != null) {
b = converter.toBytes(s, offset, length);
} else if (encoding == null) {
byte[] temp = s.substring(offset, offset + length).getBytes();
length = temp.length;
b = new byte[length];
System.arraycopy(temp, 0, b, 0, length);
} else {
byte[] temp = s.substring(offset, offset + length)
.getBytes(encoding);
length = temp.length;
b = new byte[length];
System.arraycopy(temp, 0, b, 0, length);
if (!parserKnowsUnicode && (encoding.equalsIgnoreCase("SJIS") //$NON-NLS-1$
|| encoding.equalsIgnoreCase("BIG5") //$NON-NLS-1$
|| encoding.equalsIgnoreCase("GBK"))) { //$NON-NLS-1$
if (!encoding.equalsIgnoreCase(serverEncoding)) {
b = escapeEasternUnicodeByteStream(b, s, offset, length);
}
}
}
return b;
} catch (UnsupportedEncodingException uee) {
throw SQLError.createSQLException(Messages.getString("StringUtils.10") //$NON-NLS-1$
+ encoding + Messages.getString("StringUtils.11"),
SQLError.SQL_STATE_ILLEGAL_ARGUMENT, exceptionInterceptor); //$NON-NLS-1$
}
}
/**
* Returns the byte[] representation of the given string using given
* encoding.
*
* @param s
* the string to convert
* @param encoding
* the character encoding to use
* @param parserKnowsUnicode
* DOCUMENT ME!
*
* @return byte[] representation of the string
*
* @throws SQLException
* if an encoding unsupported by the JVM is supplied.
*/
public static final byte[] getBytes(String s, String encoding,
String serverEncoding, boolean parserKnowsUnicode,
MySQLConnection conn, ExceptionInterceptor exceptionInterceptor)
throws SQLException {
try {
SingleByteCharsetConverter converter = null;
if (conn != null) {
converter = conn.getCharsetConverter(encoding);
} else {
converter = SingleByteCharsetConverter.getInstance(encoding, null);
}
return getBytes(s, converter, encoding, serverEncoding,
parserKnowsUnicode, exceptionInterceptor);
} catch (UnsupportedEncodingException uee) {
throw SQLError.createSQLException(Messages.getString("StringUtils.0") //$NON-NLS-1$
+ encoding + Messages.getString("StringUtils.1"),
SQLError.SQL_STATE_ILLEGAL_ARGUMENT, exceptionInterceptor); //$NON-NLS-1$
}
}
public static int getInt(byte[] buf, int offset, int endPos) throws NumberFormatException {
int base = 10;
int s = offset;
/* Skip white space. */
while (Character.isWhitespace((char) buf[s]) && (s < endPos)) {
++s;
}
if (s == endPos) {
throw new NumberFormatException(StringUtils.toString(buf));
}
/* Check for a sign. */
boolean negative = false;
if ((char) buf[s] == '-') {
negative = true;
++s;
} else if ((char) buf[s] == '+') {
++s;
}
/* Save the pointer so we can check later if anything happened. */
int save = s;
int cutoff = Integer.MAX_VALUE / base;
int cutlim = (Integer.MAX_VALUE % base);
if (negative) {
cutlim++;
}
boolean overflow = false;
int i = 0;
for (; s < endPos; s++) {
char c = (char) buf[s];
if (Character.isDigit(c)) {
c -= '0';
} else if (Character.isLetter(c)) {
c = (char) (Character.toUpperCase(c) - 'A' + 10);
} else {
break;
}
if (c >= base) {
break;
}
/* Check for overflow. */
if ((i > cutoff) || ((i == cutoff) && (c > cutlim))) {
overflow = true;
} else {
i *= base;
i += c;
}
}
if (s == save) {
throw new NumberFormatException(StringUtils.toString(buf));
}
if (overflow) {
throw new NumberFormatException(StringUtils.toString(buf));
}
/* Return the result of the appropriate sign. */
return (negative ? (-i) : i);
}
public static int getInt(byte[] buf) throws NumberFormatException {
return getInt(buf, 0, buf.length);
}
public static long getLong(byte[] buf) throws NumberFormatException {
return getLong(buf, 0, buf.length);
}
public static long getLong(byte[] buf, int offset, int endpos) throws NumberFormatException {
int base = 10;
int s = offset;
/* Skip white space. */
while (Character.isWhitespace((char) buf[s]) && (s < endpos)) {
++s;
}
if (s == endpos) {
throw new NumberFormatException(StringUtils.toString(buf));
}
/* Check for a sign. */
boolean negative = false;
if ((char) buf[s] == '-') {
negative = true;
++s;
} else if ((char) buf[s] == '+') {
++s;
}
/* Save the pointer so we can check later if anything happened. */
int save = s;
long cutoff = Long.MAX_VALUE / base;
long cutlim = (int) (Long.MAX_VALUE % base);
if (negative) {
cutlim++;
}
boolean overflow = false;
long i = 0;
for (; s < endpos; s++) {
char c = (char) buf[s];
if (Character.isDigit(c)) {
c -= '0';
} else if (Character.isLetter(c)) {
c = (char) (Character.toUpperCase(c) - 'A' + 10);
} else {
break;
}
if (c >= base) {
break;
}
/* Check for overflow. */
if ((i > cutoff) || ((i == cutoff) && (c > cutlim))) {
overflow = true;
} else {
i *= base;
i += c;
}
}
if (s == save) {
throw new NumberFormatException(StringUtils.toString(buf));
}
if (overflow) {
throw new NumberFormatException(StringUtils.toString(buf));
}
/* Return the result of the appropriate sign. */
return (negative ? (-i) : i);
}
public static short getShort(byte[] buf) throws NumberFormatException {
short base = 10;
int s = 0;
/* Skip white space. */
while (Character.isWhitespace((char) buf[s]) && (s < buf.length)) {
++s;
}
if (s == buf.length) {
throw new NumberFormatException(StringUtils.toString(buf));
}
/* Check for a sign. */
boolean negative = false;
if ((char) buf[s] == '-') {
negative = true;
++s;
} else if ((char) buf[s] == '+') {
++s;
}
/* Save the pointer so we can check later if anything happened. */
int save = s;
short cutoff = (short) (Short.MAX_VALUE / base);
short cutlim = (short) (Short.MAX_VALUE % base);
if (negative) {
cutlim++;
}
boolean overflow = false;
short i = 0;
for (; s < buf.length; s++) {
char c = (char) buf[s];
if (Character.isDigit(c)) {
c -= '0';
} else if (Character.isLetter(c)) {
c = (char) (Character.toUpperCase(c) - 'A' + 10);
} else {
break;
}
if (c >= base) {
break;
}
/* Check for overflow. */
if ((i > cutoff) || ((i == cutoff) && (c > cutlim))) {
overflow = true;
} else {
i *= base;
i += c;
}
}
if (s == save) {
throw new NumberFormatException(StringUtils.toString(buf));
}
if (overflow) {
throw new NumberFormatException(StringUtils.toString(buf));
}
/* Return the result of the appropriate sign. */
return (negative ? (short) -i : (short) i);
}
public final static int indexOfIgnoreCase(int startingPosition,
String searchIn, String searchFor) {
if ((searchIn == null) || (searchFor == null)
|| startingPosition > searchIn.length()) {
return -1;
}
int patternLength = searchFor.length();
int stringLength = searchIn.length();
int stopSearchingAt = stringLength - patternLength;
if (patternLength == 0) {
return -1;
}
// Brute force string pattern matching
// Some locales don't follow upper-case rule, so need to check both
char firstCharOfPatternUc = Character.toUpperCase(searchFor.charAt(0));
char firstCharOfPatternLc = Character.toLowerCase(searchFor.charAt(0));
// note, this also catches the case where patternLength > stringLength
for (int i = startingPosition; i <= stopSearchingAt; i++) {
if (isNotEqualIgnoreCharCase(searchIn, firstCharOfPatternUc,
firstCharOfPatternLc, i)) {
// find the first occurrence of the first character of searchFor in searchIn
while (++i <= stopSearchingAt && (isNotEqualIgnoreCharCase(searchIn, firstCharOfPatternUc,
firstCharOfPatternLc, i)));
}
if (i <= stopSearchingAt /* searchFor might be one character long! */) {
// walk searchIn and searchFor in lock-step starting just past the first match,bail out if not
// a match, or we've hit the end of searchFor...
int j = i + 1;
int end = j + patternLength - 1;
for (int k = 1; j < end && (Character.toLowerCase(searchIn.charAt(j)) ==
Character.toLowerCase(searchFor.charAt(k)) || Character.toUpperCase(searchIn.charAt(j)) ==
Character.toUpperCase(searchFor.charAt(k))); j++, k++);
if (j == end) {
return i;
}
}
}
return -1;
}
private final static boolean isNotEqualIgnoreCharCase(String searchIn,
char firstCharOfPatternUc, char firstCharOfPatternLc, int i) {
return Character.toLowerCase(searchIn.charAt(i)) != firstCharOfPatternLc && Character.toUpperCase(searchIn.charAt(i)) != firstCharOfPatternUc;
}
/**
* DOCUMENT ME!
*
* @param searchIn
* DOCUMENT ME!
* @param searchFor
* DOCUMENT ME!
*
* @return DOCUMENT ME!
*/
public final static int indexOfIgnoreCase(String searchIn, String searchFor) {
return indexOfIgnoreCase(0, searchIn, searchFor);
}
public static int indexOfIgnoreCaseRespectMarker(int startAt, String src,
String target, String marker, String markerCloses,
boolean allowBackslashEscapes) {
char contextMarker = Character.MIN_VALUE;
boolean escaped = false;
int markerTypeFound = 0;
int srcLength = src.length();
int ind = 0;
for (int i = startAt; i < srcLength; i++) {
char c = src.charAt(i);
if (allowBackslashEscapes && c == '\\') {
escaped = !escaped;
} else if (contextMarker != Character.MIN_VALUE && c == markerCloses.charAt(markerTypeFound) && !escaped) {
contextMarker = Character.MIN_VALUE;
} else if ((ind = marker.indexOf(c)) != -1 && !escaped
&& contextMarker == Character.MIN_VALUE) {
markerTypeFound = ind;
contextMarker = c;
} else if ((Character.toUpperCase(c) == Character.toUpperCase(target.charAt(0)) ||
Character.toLowerCase(c) == Character.toLowerCase(target.charAt(0))) && !escaped
&& contextMarker == Character.MIN_VALUE) {
if (startsWithIgnoreCase(src, i, target))
return i;
}
}
return -1;
}
public static int indexOfIgnoreCaseRespectQuotes(int startAt, String src,
String target, char quoteChar, boolean allowBackslashEscapes) {
char contextMarker = Character.MIN_VALUE;
boolean escaped = false;
int srcLength = src.length();
for (int i = startAt; i < srcLength; i++) {
char c = src.charAt(i);
if (allowBackslashEscapes && c == '\\') {
escaped = !escaped;
} else if (c == contextMarker && !escaped) {
contextMarker = Character.MIN_VALUE;
} else if (c == quoteChar && !escaped
&& contextMarker == Character.MIN_VALUE) {
contextMarker = c;
// This test looks complex, but remember that in certain locales, upper case
// of two different codepoints coverts to same codepoint, and vice-versa.
} else if ((Character.toUpperCase(c) == Character.toUpperCase(target.charAt(0)) ||
Character.toLowerCase(c) == Character.toLowerCase(target.charAt(0))) && !escaped
&& contextMarker == Character.MIN_VALUE) {
if (startsWithIgnoreCase(src, i, target))
return i;
}
}
return -1;
}
/**
* Splits stringToSplit into a list, using the given delimitter
*
* @param stringToSplit
* the string to split
* @param delimitter
* the string to split on
* @param trim
* should the split strings be whitespace trimmed?
*
* @return the list of strings, split by delimitter
*
* @throws IllegalArgumentException
* DOCUMENT ME!
*/
public static final List<String> split(String stringToSplit, String delimitter,
boolean trim) {
if (stringToSplit == null) {
return new ArrayList<String>();
}
if (delimitter == null) {
throw new IllegalArgumentException();
}
StringTokenizer tokenizer = new StringTokenizer(stringToSplit,
delimitter, false);
List<String> splitTokens = new ArrayList<String>(tokenizer.countTokens());
while (tokenizer.hasMoreTokens()) {
String token = tokenizer.nextToken();
if (trim) {
token = token.trim();
}
splitTokens.add(token);
}
return splitTokens;
}
/**
* Splits stringToSplit into a list, using the given delimitter
*
* @param stringToSplit
* the string to split
* @param delimitter
* the string to split on
* @param trim
* should the split strings be whitespace trimmed?
*
* @return the list of strings, split by delimiter
*
* @throws IllegalArgumentException
* DOCUMENT ME!
*/
public static final List<String> split(String stringToSplit, String delimiter,
String markers, String markerCloses, boolean trim) {
if (stringToSplit == null) {
return new ArrayList<String>();
}
if (delimiter == null) {
throw new IllegalArgumentException();
}
int delimPos = 0;
int currentPos = 0;
List<String> splitTokens = new ArrayList<String>();
while ((delimPos = indexOfIgnoreCaseRespectMarker(currentPos,
stringToSplit, delimiter, markers, markerCloses, false)) != -1) {
String token = stringToSplit.substring(currentPos, delimPos);
if (trim) {
token = token.trim();
}
splitTokens.add(token);
currentPos = delimPos + 1;
}
if (currentPos < stringToSplit.length()) {
String token = stringToSplit.substring(currentPos);
if (trim) {
token = token.trim();
}
splitTokens.add(token);
}
return splitTokens;
}
private static boolean startsWith(byte[] dataFrom, String chars) {
for (int i = 0; i < chars.length(); i++) {
if (dataFrom[i] != chars.charAt(i)) {
return false;
}
}
return true;
}
/**
* Determines whether or not the string 'searchIn' contains the string
* 'searchFor', dis-regarding case starting at 'startAt' Shorthand for a
* String.regionMatch(...)
*
* @param searchIn
* the string to search in
* @param startAt
* the position to start at
* @param searchFor
* the string to search for
*
* @return whether searchIn starts with searchFor, ignoring case
*/
public static boolean startsWithIgnoreCase(String searchIn, int startAt,
String searchFor) {
return searchIn.regionMatches(true, startAt, searchFor, 0, searchFor
.length());
}
/**
* Determines whether or not the string 'searchIn' contains the string
* 'searchFor', dis-regarding case. Shorthand for a String.regionMatch(...)
*
* @param searchIn
* the string to search in
* @param searchFor
* the string to search for
*
* @return whether searchIn starts with searchFor, ignoring case
*/
public static boolean startsWithIgnoreCase(String searchIn, String searchFor) {
return startsWithIgnoreCase(searchIn, 0, searchFor);
}
/**
* Determines whether or not the sting 'searchIn' contains the string
* 'searchFor', disregarding case,leading whitespace and non-alphanumeric
* characters.
*
* @param searchIn
* the string to search in
* @param searchFor
* the string to search for
*
* @return true if the string starts with 'searchFor' ignoring whitespace
*/
public static boolean startsWithIgnoreCaseAndNonAlphaNumeric(
String searchIn, String searchFor) {
if (searchIn == null) {
return searchFor == null;
}
int beginPos = 0;
int inLength = searchIn.length();
for (beginPos = 0; beginPos < inLength; beginPos++) {
char c = searchIn.charAt(beginPos);
if (Character.isLetterOrDigit(c)) {
break;
}
}
return startsWithIgnoreCase(searchIn, beginPos, searchFor);
}
/**
* Determines whether or not the sting 'searchIn' contains the string
* 'searchFor', disregarding case and leading whitespace
*
* @param searchIn
* the string to search in
* @param searchFor
* the string to search for
*
* @return true if the string starts with 'searchFor' ignoring whitespace
*/
public static boolean startsWithIgnoreCaseAndWs(String searchIn,
String searchFor) {
return startsWithIgnoreCaseAndWs(searchIn, searchFor, 0);
}
/**
* Determines whether or not the sting 'searchIn' contains the string
* 'searchFor', disregarding case and leading whitespace
*
* @param searchIn
* the string to search in
* @param searchFor
* the string to search for
* @param beginPos
* where to start searching
*
* @return true if the string starts with 'searchFor' ignoring whitespace
*/
public static boolean startsWithIgnoreCaseAndWs(String searchIn,
String searchFor, int beginPos) {
if (searchIn == null) {
return searchFor == null;
}
int inLength = searchIn.length();
for (; beginPos < inLength; beginPos++) {
if (!Character.isWhitespace(searchIn.charAt(beginPos))) {
break;
}
}
return startsWithIgnoreCase(searchIn, beginPos, searchFor);
}
/**
* @param bytesToStrip
* @param prefix
* @param suffix
* @return
*/
public static byte[] stripEnclosure(byte[] source, String prefix,
String suffix) {
if (source.length >= prefix.length() + suffix.length()
&& startsWith(source, prefix) && endsWith(source, suffix)) {
int totalToStrip = prefix.length() + suffix.length();
int enclosedLength = source.length - totalToStrip;
byte[] enclosed = new byte[enclosedLength];
int startPos = prefix.length();
int numToCopy = enclosed.length;
System.arraycopy(source, startPos, enclosed, 0, numToCopy);
return enclosed;
}
return source;
}
/**
* Returns the bytes as an ASCII String.
*
* @param buffer
* the bytes representing the string
*
* @return The ASCII String.
*/
public static final String toAsciiString(byte[] buffer) {
return toAsciiString(buffer, 0, buffer.length);
}
/**
* Returns the bytes as an ASCII String.
*
* @param buffer
* the bytes to convert
* @param startPos
* the position to start converting
* @param length
* the length of the string to convert
*
* @return the ASCII string
*/
public static final String toAsciiString(byte[] buffer, int startPos,
int length) {
char[] charArray = new char[length];
int readpoint = startPos;
for (int i = 0; i < length; i++) {
charArray[i] = (char) buffer[readpoint];
readpoint++;
}
return new String(charArray);
}
/**
* Compares searchIn against searchForWildcard with wildcards (heavily
* borrowed from strings/ctype-simple.c in the server sources)
*
* @param searchIn
* the string to search in
* @param searchForWildcard
* the string to search for, using the 'standard' SQL wildcard
* chars of '%' and '_'
*
* @return WILD_COMPARE_MATCH_NO_WILD if matched, WILD_COMPARE_NO_MATCH if
* not matched with wildcard, WILD_COMPARE_MATCH_WITH_WILD if
* matched with wildcard
*/
public static int wildCompare(String searchIn, String searchForWildcard) {
if ((searchIn == null) || (searchForWildcard == null)) {
return WILD_COMPARE_NO_MATCH;
}
if (searchForWildcard.equals("%")) { //$NON-NLS-1$
return WILD_COMPARE_MATCH_WITH_WILD;
}
int result = WILD_COMPARE_NO_MATCH; /* Not found, using wildcards */
char wildcardMany = '%';
char wildcardOne = '_';
char wildcardEscape = '\\';
int searchForPos = 0;
int searchForEnd = searchForWildcard.length();
int searchInPos = 0;
int searchInEnd = searchIn.length();
while (searchForPos != searchForEnd) {
char wildstrChar = searchForWildcard.charAt(searchForPos);
while ((searchForWildcard.charAt(searchForPos) != wildcardMany)
&& (wildstrChar != wildcardOne)) {
if ((searchForWildcard.charAt(searchForPos) == wildcardEscape)
&& ((searchForPos + 1) != searchForEnd)) {
searchForPos++;
}
if ((searchInPos == searchInEnd)
|| (Character.toUpperCase(searchForWildcard
.charAt(searchForPos++)) != Character
.toUpperCase(searchIn.charAt(searchInPos++)))) {
return WILD_COMPARE_MATCH_WITH_WILD; /* No match */
}
if (searchForPos == searchForEnd) {
return ((searchInPos != searchInEnd) ? WILD_COMPARE_MATCH_WITH_WILD
: WILD_COMPARE_MATCH_NO_WILD); /*
* Match if both are
* at end
*/
}
result = WILD_COMPARE_MATCH_WITH_WILD; /* Found an anchor char */
}
if (searchForWildcard.charAt(searchForPos) == wildcardOne) {
do {
if (searchInPos == searchInEnd) { /*
* Skip one char if
* possible
*/
return (result);
}
searchInPos++;
} while ((++searchForPos < searchForEnd)
&& (searchForWildcard.charAt(searchForPos) == wildcardOne));
if (searchForPos == searchForEnd) {
break;
}
}
if (searchForWildcard.charAt(searchForPos) == wildcardMany) { /*
* Found
* w_many
*/
char cmp;
searchForPos++;
/* Remove any '%' and '_' from the wild search string */
for (; searchForPos != searchForEnd; searchForPos++) {
if (searchForWildcard.charAt(searchForPos) == wildcardMany) {
continue;
}
if (searchForWildcard.charAt(searchForPos) == wildcardOne) {
if (searchInPos == searchInEnd) {
return (WILD_COMPARE_NO_MATCH);
}
searchInPos++;
continue;
}
break; /* Not a wild character */
}
if (searchForPos == searchForEnd) {
return WILD_COMPARE_MATCH_NO_WILD; /* Ok if w_many is last */
}
if (searchInPos == searchInEnd) {
return WILD_COMPARE_NO_MATCH;
}
if (((cmp = searchForWildcard.charAt(searchForPos)) == wildcardEscape)
&& ((searchForPos + 1) != searchForEnd)) {
cmp = searchForWildcard.charAt(++searchForPos);
}
searchForPos++;
do {
while ((searchInPos != searchInEnd)
&& (Character.toUpperCase(searchIn
.charAt(searchInPos)) != Character
.toUpperCase(cmp)))
searchInPos++;
if (searchInPos++ == searchInEnd) {
return WILD_COMPARE_NO_MATCH;
}
{
int tmp = wildCompare(searchIn, searchForWildcard);
if (tmp <= 0) {
return (tmp);
}
}
} while ((searchInPos != searchInEnd)
&& (searchForWildcard.charAt(0) != wildcardMany));
return WILD_COMPARE_NO_MATCH;
}
}
return ((searchInPos != searchInEnd) ? WILD_COMPARE_MATCH_WITH_WILD
: WILD_COMPARE_MATCH_NO_WILD);
}
static byte[] s2b(String s, MySQLConnection conn) throws SQLException {
if (s == null) {
return null;
}
if ((conn != null) && conn.getUseUnicode()) {
try {
String encoding = conn.getEncoding();
if (encoding == null) {
return s.getBytes();
}
SingleByteCharsetConverter converter = conn
.getCharsetConverter(encoding);
if (converter != null) {
return converter.toBytes(s);
}
return s.getBytes(encoding);
} catch (java.io.UnsupportedEncodingException E) {
return s.getBytes();
}
}
return s.getBytes();
}
public static int lastIndexOf(byte[] s, char c) {
if (s == null) {
return -1;
}
for (int i = s.length - 1; i >= 0; i--) {
if (s[i] == c) {
return i;
}
}
return -1;
}
public static int indexOf(byte[] s, char c) {
if (s == null) {
return -1;
}
int length = s.length;
for (int i = 0; i < length; i++) {
if (s[i] == c) {
return i;
}
}
return -1;
}
public static boolean isNullOrEmpty(String toTest) {
return (toTest == null || toTest.length() == 0);
}
/**
* Returns the given string, with comments removed
*
* @param src
* the source string
* @param stringOpens
* characters which delimit the "open" of a string
* @param stringCloses
* characters which delimit the "close" of a string, in
* counterpart order to <code>stringOpens</code>
* @param slashStarComments
* strip slash-star type "C" style comments
* @param slashSlashComments
* strip slash-slash C++ style comments to end-of-line
* @param hashComments
* strip #-style comments to end-of-line
* @param dashDashComments
* strip "--" style comments to end-of-line
* @return the input string with all comment-delimited data removed
*/
public static String stripComments(String src, String stringOpens,
String stringCloses, boolean slashStarComments,
boolean slashSlashComments, boolean hashComments,
boolean dashDashComments) {
if (src == null) {
return null;
}
StringBuffer buf = new StringBuffer(src.length());
// It's just more natural to deal with this as a stream
// when parsing..This code is currently only called when
// parsing the kind of metadata that developers are strongly
// recommended to cache anyways, so we're not worried
// about the _1_ extra object allocation if it cleans
// up the code
StringReader sourceReader = new StringReader(src);
int contextMarker = Character.MIN_VALUE;
boolean escaped = false;
int markerTypeFound = -1;
int ind = 0;
int currentChar = 0;
try {
while ((currentChar = sourceReader.read()) != -1) {
if (false && currentChar == '\\') {
escaped = !escaped;
} else if (markerTypeFound != -1 && currentChar == stringCloses.charAt(markerTypeFound)
&& !escaped) {
contextMarker = Character.MIN_VALUE;
markerTypeFound = -1;
} else if ((ind = stringOpens.indexOf(currentChar)) != -1
&& !escaped && contextMarker == Character.MIN_VALUE) {
markerTypeFound = ind;
contextMarker = currentChar;
}
if (contextMarker == Character.MIN_VALUE && currentChar == '/'
&& (slashSlashComments || slashStarComments)) {
currentChar = sourceReader.read();
if (currentChar == '*' && slashStarComments) {
int prevChar = 0;
while ((currentChar = sourceReader.read()) != '/'
|| prevChar != '*') {
if (currentChar == '\r') {
currentChar = sourceReader.read();
if (currentChar == '\n') {
currentChar = sourceReader.read();
}
} else {
if (currentChar == '\n') {
currentChar = sourceReader.read();
}
}
if (currentChar < 0)
break;
prevChar = currentChar;
}
continue;
} else if (currentChar == '/' && slashSlashComments) {
while ((currentChar = sourceReader.read()) != '\n'
&& currentChar != '\r' && currentChar >= 0)
;
}
} else if (contextMarker == Character.MIN_VALUE
&& currentChar == '#' && hashComments) {
// Slurp up everything until the newline
while ((currentChar = sourceReader.read()) != '\n'
&& currentChar != '\r' && currentChar >= 0)
;
} else if (contextMarker == Character.MIN_VALUE
&& currentChar == '-' && dashDashComments) {
currentChar = sourceReader.read();
if (currentChar == -1 || currentChar != '-') {
buf.append('-');
if (currentChar != -1) {
buf.append(currentChar);
}
continue;
}
// Slurp up everything until the newline
while ((currentChar = sourceReader.read()) != '\n'
&& currentChar != '\r' && currentChar >= 0)
;
}
if (currentChar != -1) {
buf.append((char) currentChar);
}
}
} catch (IOException ioEx) {
// we'll never see this from a StringReader
}
return buf.toString();
}
/**
* Next two functions are to help DBMD check if
* the given string is in form of database.name and return it
* as "database";"name" with comments removed.
* If string is NULL or wildcard (%), returns null and exits.
*
* First, we sanitize...
*
* @param src
* the source string
* @return the input string with all comment-delimited data removed
*/
public static String sanitizeProcOrFuncName(String src) {
if ((src == null) || (src.equals("%"))) {
return null;
}
return src;
}
/**
* Next we check if there is anything to split. If so
* we return result in form of "database";"name"
* If string is NULL or wildcard (%), returns null and exits.
*
* @param src
* the source string
* @param cat
* Catalog, if available
* @param quotId
* quoteId as defined on server
* @param isNoBslashEscSet
* Is our connection in BackSlashEscape mode
* @return the input string with all comment-delimited data removed
*/
public static List<String> splitDBdotName(String src, String cat, String quotId,
boolean isNoBslashEscSet) {
if ((src == null) || (src.equals("%"))) {
return new ArrayList<String>();
}
boolean isQuoted = StringUtils.indexOfIgnoreCase(0,src, quotId) > -1;
String retval = src;
String tmpCat = cat;
//I.e., what if database is named `MyDatabase 1.0.0`... thus trueDotIndex
int trueDotIndex = -1;
if (!" ".equals(quotId)) {
//Presumably, if there is a database name attached and it contains dots, then it should
//be quoted so we first check for that
if (isQuoted) {
trueDotIndex = StringUtils.indexOfIgnoreCase(0,
retval, quotId + "." + quotId);
} else {
//NOT quoted, fetch first DOT
// ex: cStmt = this.conn.prepareCall("{call bug57022.procbug57022(?, ?)}");
trueDotIndex = StringUtils.indexOfIgnoreCase(0,
retval, ".");
}
} else {
trueDotIndex = retval.indexOf(".");
}
List<String> retTokens = new ArrayList<String>(2);
if (trueDotIndex != -1) {
//There is a catalog attached
if (isQuoted) {
tmpCat = StringUtils.toString(StringUtils.stripEnclosure(retval.substring(0, trueDotIndex+1)
.getBytes(), quotId, quotId));
if (StringUtils.startsWithIgnoreCaseAndWs(tmpCat, quotId)) {
tmpCat = tmpCat.substring(1, tmpCat.length() - 1);
}
retval = retval.substring(trueDotIndex + 2);
retval = StringUtils.toString(StringUtils.stripEnclosure(retval
.getBytes(), quotId, quotId));
} else {
//NOT quoted, adjust indexOf
tmpCat = retval.substring(0, trueDotIndex);
retval = retval.substring(trueDotIndex + 1);
}
} else {
//No catalog attached, strip retval and return
retval = StringUtils.toString(StringUtils.stripEnclosure(retval
.getBytes(), quotId, quotId));
}
retTokens.add(tmpCat);
retTokens.add(retval);
return retTokens;
}
public static final boolean isEmptyOrWhitespaceOnly(String str) {
if (str == null || str.length() == 0) {
return true;
}
int length = str.length();
for (int i = 0; i < length; i++) {
if (!Character.isWhitespace(str.charAt(i))) {
return false;
}
}
return true;
}
public static String escapeQuote(String src, String quotChar) {
if (src == null) {
return null;
}
src = StringUtils.toString(stripEnclosure(src.getBytes(), quotChar, quotChar));
int lastNdx = src.indexOf(quotChar);
String tmpSrc;
String tmpRest;
tmpSrc = src.substring(0, lastNdx);
tmpSrc = tmpSrc + quotChar + quotChar;
tmpRest = src.substring(lastNdx+1, src.length());
lastNdx = tmpRest.indexOf(quotChar);
while (lastNdx > -1) {
tmpSrc = tmpSrc + tmpRest.substring(0, lastNdx);
tmpSrc = tmpSrc + quotChar + quotChar;
tmpRest = tmpRest.substring(lastNdx+1, tmpRest.length());
lastNdx = tmpRest.indexOf(quotChar);
}
tmpSrc = tmpSrc + tmpRest;
src = tmpSrc;
return src;
}
// The following methods all exist because of the Java bug
//
// http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6790402
//
// which has been observed by users and reported as MySQL Bug#61105
//
// We can turn around and replace them with their java.lang.String
// equivalents if/when that bug is ever fixed.
public static String toString(byte[] value, int offset, int length,
String encoding) throws UnsupportedEncodingException {
Charset cs = findCharset(encoding);
return cs.decode(ByteBuffer.wrap(value, offset, length)).toString();
}
public static String toString(byte[] value, String encoding)
throws UnsupportedEncodingException {
Charset cs = findCharset(encoding);
return cs.decode(ByteBuffer.wrap(value)).toString();
}
public static String toString(byte[] value, int offset, int length) {
try {
Charset cs = findCharset(platformEncoding);
return cs.decode(ByteBuffer.wrap(value, offset, length)).toString();
} catch (UnsupportedEncodingException e) {
// can't happen, emulating new String(byte[])
}
return null;
}
public static String toString(byte[] value) {
try {
Charset cs = findCharset(platformEncoding);
return cs.decode(ByteBuffer.wrap(value)).toString();
} catch (UnsupportedEncodingException e) {
// can't happen, emulating new String(byte[])
}
return null;
}
public static byte[] getBytes(String value, String encoding)
throws UnsupportedEncodingException {
Charset cs = findCharset(encoding);
// can't simply .array() this to get the bytes
// especially with variable-length charsets the
// buffer is sometimes larger than the actual encoded data
ByteBuffer buf = cs.encode(value);
int encodedLen = buf.limit();
byte[] asBytes = new byte[encodedLen];
buf.get(asBytes, 0, encodedLen);
return asBytes;
}
public static byte[] getBytes(String value) {
try {
Charset cs = findCharset(platformEncoding);
ByteBuffer buf = cs.encode(value);
int encodedLen = buf.limit();
byte[] asBytes = new byte[encodedLen];
buf.get(asBytes, 0, encodedLen);
return asBytes;
} catch (UnsupportedEncodingException e) {
// can't happen, emulating new String(byte[])
}
return null;
}
public static final boolean isValidIdChar(char c) {
return VALID_ID_CHARS.indexOf(c) != -1;
}
}