|
What this is
This file is included in the DevDaily.com
"Java Source Code
Warehouse" project. The intent of this project is to help you "Learn
Java by Example" TM.
Other links
The source code
/*
* Copyright (C) The Apache Software Foundation. All rights reserved.
*
* This software is published under the terms of the Apache Software License
* version 1.1, a copy of which has been included with this distribution in
* the LICENSE.txt file.
*/
package org.apache.log4j.helpers;
import java.util.Calendar;
import java.util.TimeZone;
import java.util.Date;
import java.text.FieldPosition;
import java.text.ParsePosition;
// Contributors: Arndt Schoenewald
/**
Formats a {@link Date} in the format "YYYY-mm-dd HH:mm:ss,SSS" for example
"1999-11-27 15:49:37,459".
Refer to the summary of the
International Standard Date and Time Notation for more
information on this format.
@author Ceki Gülcü
@author Andrew Vajoczki
@since 0.7.5
*/
public class ISO8601DateFormat extends AbsoluteTimeDateFormat {
public
ISO8601DateFormat() {
}
public
ISO8601DateFormat(TimeZone timeZone) {
super(timeZone);
}
static private long lastTime;
static private char[] lastTimeString = new char[20];
/**
Appends a date in the format "YYYY-mm-dd HH:mm:ss,SSS"
to sbuf . For example: "1999-11-27 15:49:37,459".
@param sbuf the StringBuffer to write to
*/
public
StringBuffer format(Date date, StringBuffer sbuf,
FieldPosition fieldPosition) {
long now = date.getTime();
int millis = (int)(now % 1000);
if ((now - millis) != lastTime) {
// We reach this point at most once per second
// across all threads instead of each time format()
// is called. This saves considerable CPU time.
calendar.setTime(date);
int start = sbuf.length();
int year = calendar.get(Calendar.YEAR);
sbuf.append(year);
String month;
switch(calendar.get(Calendar.MONTH)) {
case Calendar.JANUARY: month = "-01-"; break;
case Calendar.FEBRUARY: month = "-02-"; break;
case Calendar.MARCH: month = "-03-"; break;
case Calendar.APRIL: month = "-04-"; break;
case Calendar.MAY: month = "-05-"; break;
case Calendar.JUNE: month = "-06-"; break;
case Calendar.JULY: month = "-07-"; break;
case Calendar.AUGUST: month = "-08-"; break;
case Calendar.SEPTEMBER: month = "-09-"; break;
case Calendar.OCTOBER: month = "-10-"; break;
case Calendar.NOVEMBER: month = "-11-"; break;
case Calendar.DECEMBER: month = "-12-"; break;
default: month = "-NA-"; break;
}
sbuf.append(month);
int day = calendar.get(Calendar.DAY_OF_MONTH);
if(day < 10)
sbuf.append('0');
sbuf.append(day);
sbuf.append(' ');
int hour = calendar.get(Calendar.HOUR_OF_DAY);
if(hour < 10) {
sbuf.append('0');
}
sbuf.append(hour);
sbuf.append(':');
int mins = calendar.get(Calendar.MINUTE);
if(mins < 10) {
sbuf.append('0');
}
sbuf.append(mins);
sbuf.append(':');
int secs = calendar.get(Calendar.SECOND);
if(secs < 10) {
sbuf.append('0');
}
sbuf.append(secs);
sbuf.append(',');
// store the time string for next time to avoid recomputation
sbuf.getChars(start, sbuf.length(), lastTimeString, 0);
lastTime = now - millis;
}
else {
sbuf.append(lastTimeString);
}
if (millis < 100)
sbuf.append('0');
if (millis < 10)
sbuf.append('0');
sbuf.append(millis);
return sbuf;
}
/**
This method does not do anything but return null .
*/
public
Date parse(java.lang.String s, ParsePosition pos) {
return null;
}
}
|