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JDBC Type 4 driver for MySQL
/*
* Copyright (c) 2002, 2018, Oracle and/or its affiliates. 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, version 2.0, as published by the
* Free Software Foundation.
*
* This program is also distributed with certain software (including but not
* limited to OpenSSL) that is licensed under separate terms, as designated in a
* particular file or component or in included license documentation. The
* authors of MySQL hereby grant you an additional permission to link the
* program and your derivative works with the separately licensed software that
* they have included with MySQL.
*
* Without limiting anything contained in the foregoing, this file, which is
* part of MySQL Connector/J, is also subject to the Universal FOSS Exception,
* version 1.0, a copy of which can be found at
* http://oss.oracle.com/licenses/universal-foss-exception.
*
* 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, version 2.0,
* 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.cj.util;
import java.io.IOException;
import java.io.StringReader;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.sql.Timestamp;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Locale;
import java.util.Properties;
import java.util.TimeZone;
import com.mysql.cj.Messages;
import com.mysql.cj.exceptions.ExceptionFactory;
import com.mysql.cj.exceptions.ExceptionInterceptor;
import com.mysql.cj.exceptions.InvalidConnectionAttributeException;
import com.mysql.cj.exceptions.WrongArgumentException;
/**
* Timezone conversion routines and other time related methods
*/
public class TimeUtil {
static final TimeZone GMT_TIMEZONE = TimeZone.getTimeZone("GMT");
// Mappings from TimeZone identifications (prefixed by type: Windows, TZ name, MetaZone, TZ alias, ...), to standard TimeZone Ids
private static final String TIME_ZONE_MAPPINGS_RESOURCE = "/com/mysql/cj/util/TimeZoneMapping.properties";
private static Properties timeZoneMappings = null;
protected final static Method systemNanoTimeMethod;
static {
Method aMethod;
try {
aMethod = System.class.getMethod("nanoTime", (Class[]) null);
} catch (SecurityException e) {
aMethod = null;
} catch (NoSuchMethodException e) {
aMethod = null;
}
systemNanoTimeMethod = aMethod;
}
public static boolean nanoTimeAvailable() {
return systemNanoTimeMethod != null;
}
public static long getCurrentTimeNanosOrMillis() {
if (systemNanoTimeMethod != null) {
try {
return ((Long) systemNanoTimeMethod.invoke(null, (Object[]) null)).longValue();
} catch (IllegalArgumentException e) {
// ignore - fall through to currentTimeMillis()
} catch (IllegalAccessException e) {
// ignore - fall through to currentTimeMillis()
} catch (InvocationTargetException e) {
// ignore - fall through to currentTimeMillis()
}
}
return System.currentTimeMillis();
}
/**
* Returns the 'official' Java timezone name for the given timezone
*
* @param timezoneStr
* the 'common' timezone name
* @param exceptionInterceptor
* exception interceptor
*
* @return the Java timezone name for the given timezone
*/
public static String getCanonicalTimezone(String timezoneStr, ExceptionInterceptor exceptionInterceptor) {
if (timezoneStr == null) {
return null;
}
timezoneStr = timezoneStr.trim();
// handle '+/-hh:mm' form ...
if (timezoneStr.length() > 2) {
if ((timezoneStr.charAt(0) == '+' || timezoneStr.charAt(0) == '-') && Character.isDigit(timezoneStr.charAt(1))) {
return "GMT" + timezoneStr;
}
}
synchronized (TimeUtil.class) {
if (timeZoneMappings == null) {
loadTimeZoneMappings(exceptionInterceptor);
}
}
String canonicalTz;
if ((canonicalTz = timeZoneMappings.getProperty(timezoneStr)) != null) {
return canonicalTz;
}
throw ExceptionFactory.createException(InvalidConnectionAttributeException.class,
Messages.getString("TimeUtil.UnrecognizedTimezoneId", new Object[] { timezoneStr }), exceptionInterceptor);
}
/**
* Return a new Timestamp object which value is adjusted according to known DATE, DATETIME or TIMESTAMP field precision.
*
* @param ts
* an original Timestamp object, not modified by this method
* @param fsp
* value in the range from 0 to 6 specifying fractional seconds precision
* @param serverRoundFracSecs
* Flag indicating whether rounding or truncation occurs on server when inserting a TIME, DATE, or TIMESTAMP value with a fractional seconds part
* into a column having the same type but fewer fractional digits: true means rounding, false means truncation. The proper value should be
* detected by analyzing sql_mode server variable for TIME_TRUNCATE_FRACTIONAL presence.
* @return A new Timestamp object cloned from original ones and then rounded or truncated according to required fsp value
*/
public static Timestamp adjustTimestampNanosPrecision(Timestamp ts, int fsp, boolean serverRoundFracSecs) {
if (fsp < 0 || fsp > 6) {
throw ExceptionFactory.createException(WrongArgumentException.class, "fsp value must be in 0 to 6 range.");
}
Timestamp res = (Timestamp) ts.clone();
int nanos = res.getNanos();
double tail = Math.pow(10, 9 - fsp);
if (serverRoundFracSecs) {
nanos = (int) Math.round(nanos / tail) * (int) tail;
if (nanos > 999999999) {
nanos %= 1000000000; // get only last 9 digits
res.setTime(res.getTime() + 1000); // increment seconds
}
} else {
nanos = (int) (nanos / tail) * (int) tail;
}
res.setNanos(nanos);
return res;
}
/**
* Return a string representation of a fractional seconds part. This method assumes that all Timestamp adjustments are already done before,
* thus no rounding is needed, only a proper "0" padding to be done.
*
* @param nanos
* fractional seconds value
* @param fsp
* required fractional part length
* @return fractional seconds part as a string
*/
public static String formatNanos(int nanos, int fsp) {
if (nanos < 0 || nanos > 999999999) {
throw ExceptionFactory.createException(WrongArgumentException.class, "nanos value must be in 0 to 999999999 range but was " + nanos);
}
if (fsp < 0 || fsp > 6) {
throw ExceptionFactory.createException(WrongArgumentException.class, "fsp value must be in 0 to 6 range but was " + fsp);
}
if (fsp == 0 || nanos == 0) {
return "0";
}
// just truncate because we expect the rounding was done before
nanos = (int) (nanos / Math.pow(10, 9 - fsp));
if (nanos == 0) {
return "0";
}
String nanosString = Integer.toString(nanos);
final String zeroPadding = "000000000";
nanosString = zeroPadding.substring(0, fsp - nanosString.length()) + nanosString;
int pos = fsp - 1; // the end, we're padded to the end by the code above
while (nanosString.charAt(pos) == '0') {
pos--;
}
nanosString = nanosString.substring(0, pos + 1);
return nanosString;
}
/**
* Loads a properties file that contains all kinds of time zone mappings.
*
* @param exceptionInterceptor
* exception interceptor
*/
private static void loadTimeZoneMappings(ExceptionInterceptor exceptionInterceptor) {
timeZoneMappings = new Properties();
try {
timeZoneMappings.load(TimeUtil.class.getResourceAsStream(TIME_ZONE_MAPPINGS_RESOURCE));
} catch (IOException e) {
throw ExceptionFactory.createException(Messages.getString("TimeUtil.LoadTimeZoneMappingError"), exceptionInterceptor);
}
// bridge all Time Zone ids known by Java
for (String tz : TimeZone.getAvailableIDs()) {
if (!timeZoneMappings.containsKey(tz)) {
timeZoneMappings.put(tz, tz);
}
}
}
public static Timestamp truncateFractionalSeconds(Timestamp timestamp) {
Timestamp truncatedTimestamp = new Timestamp(timestamp.getTime());
truncatedTimestamp.setNanos(0);
return truncatedTimestamp;
}
public static SimpleDateFormat getSimpleDateFormat(SimpleDateFormat cachedSimpleDateFormat, String pattern, Calendar cal, TimeZone tz) {
SimpleDateFormat sdf = cachedSimpleDateFormat != null ? cachedSimpleDateFormat : new SimpleDateFormat(pattern, Locale.US);
if (cal != null) {
sdf.setCalendar((Calendar) cal.clone()); // cloning the original calendar to avoid it's modification
}
if (tz != null) {
sdf.setTimeZone(tz);
}
return sdf;
}
/**
* Used in prepared statements
*
* @param dt
* DateTime string
* @param toTime
* true if get Time pattern
* @return pattern
* @throws IOException
* if an error occurs
*/
public static final String getDateTimePattern(String dt, boolean toTime) throws IOException {
//
// Special case
//
int dtLength = (dt != null) ? dt.length() : 0;
if ((dtLength >= 8) && (dtLength <= 10)) {
int dashCount = 0;
boolean isDateOnly = true;
for (int i = 0; i < dtLength; i++) {
char c = dt.charAt(i);
if (!Character.isDigit(c) && (c != '-')) {
isDateOnly = false;
break;
}
if (c == '-') {
dashCount++;
}
}
if (isDateOnly && (dashCount == 2)) {
return "yyyy-MM-dd";
}
}
//
// Special case - time-only
//
boolean colonsOnly = true;
for (int i = 0; i < dtLength; i++) {
char c = dt.charAt(i);
if (!Character.isDigit(c) && (c != ':')) {
colonsOnly = false;
break;
}
}
if (colonsOnly) {
return "HH:mm:ss";
}
int n;
int z;
int count;
int maxvecs;
char c;
char separator;
StringReader reader = new StringReader(dt + " ");
ArrayList vec = new ArrayList<>();
ArrayList vecRemovelist = new ArrayList<>();
Object[] nv = new Object[3];
Object[] v;
nv[0] = Character.valueOf('y');
nv[1] = new StringBuilder();
nv[2] = Integer.valueOf(0);
vec.add(nv);
if (toTime) {
nv = new Object[3];
nv[0] = Character.valueOf('h');
nv[1] = new StringBuilder();
nv[2] = Integer.valueOf(0);
vec.add(nv);
}
while ((z = reader.read()) != -1) {
separator = (char) z;
maxvecs = vec.size();
for (count = 0; count < maxvecs; count++) {
v = vec.get(count);
n = ((Integer) v[2]).intValue();
c = getSuccessor(((Character) v[0]).charValue(), n);
if (!Character.isLetterOrDigit(separator)) {
if ((c == ((Character) v[0]).charValue()) && (c != 'S')) {
vecRemovelist.add(v);
} else {
((StringBuilder) v[1]).append(separator);
if ((c == 'X') || (c == 'Y')) {
v[2] = Integer.valueOf(4);
}
}
} else {
if (c == 'X') {
c = 'y';
nv = new Object[3];
nv[1] = (new StringBuilder(((StringBuilder) v[1]).toString())).append('M');
nv[0] = Character.valueOf('M');
nv[2] = Integer.valueOf(1);
vec.add(nv);
} else if (c == 'Y') {
c = 'M';
nv = new Object[3];
nv[1] = (new StringBuilder(((StringBuilder) v[1]).toString())).append('d');
nv[0] = Character.valueOf('d');
nv[2] = Integer.valueOf(1);
vec.add(nv);
}
((StringBuilder) v[1]).append(c);
if (c == ((Character) v[0]).charValue()) {
v[2] = Integer.valueOf(n + 1);
} else {
v[0] = Character.valueOf(c);
v[2] = Integer.valueOf(1);
}
}
}
int size = vecRemovelist.size();
for (int i = 0; i < size; i++) {
v = vecRemovelist.get(i);
vec.remove(v);
}
vecRemovelist.clear();
}
int size = vec.size();
for (int i = 0; i < size; i++) {
v = vec.get(i);
c = ((Character) v[0]).charValue();
n = ((Integer) v[2]).intValue();
boolean bk = getSuccessor(c, n) != c;
boolean atEnd = (((c == 's') || (c == 'm') || ((c == 'h') && toTime)) && bk);
boolean finishesAtDate = (bk && (c == 'd') && !toTime);
boolean containsEnd = (((StringBuilder) v[1]).toString().indexOf('W') != -1);
if ((!atEnd && !finishesAtDate) || (containsEnd)) {
vecRemovelist.add(v);
}
}
size = vecRemovelist.size();
for (int i = 0; i < size; i++) {
vec.remove(vecRemovelist.get(i));
}
vecRemovelist.clear();
v = vec.get(0); // might throw exception
StringBuilder format = (StringBuilder) v[1];
format.setLength(format.length() - 1);
return format.toString();
}
private static final char getSuccessor(char c, int n) {
return ((c == 'y') && (n == 2)) ? 'X'
: (((c == 'y') && (n < 4)) ? 'y' : ((c == 'y') ? 'M' : (((c == 'M') && (n == 2)) ? 'Y'
: (((c == 'M') && (n < 3)) ? 'M' : ((c == 'M') ? 'd' : (((c == 'd') && (n < 2)) ? 'd' : ((c == 'd') ? 'H' : (((c == 'H') && (n < 2))
? 'H'
: ((c == 'H') ? 'm' : (((c == 'm') && (n < 2)) ? 'm' : ((c == 'm') ? 's' : (((c == 's') && (n < 2)) ? 's' : 'W'))))))))))));
}
}