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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

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 { private static final long serialVersionUID = -759840745298755296L; 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 || lastTimeString[0] == 0) { // 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; } }





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