+/*
+ * 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 <arndt@ibm23093i821.mc.schoenewald.de>
+
+/**
+ Formats a {@link Date} in the format "yyyy-MM-dd HH:mm:ss,SSS" for example
+ "1999-11-27 15:49:37,459".
+
+ <p>Refer to the <a
+ href=http://www.cl.cam.ac.uk/~mgk25/iso-time.html>summary of the
+ International Standard Date and Time Notation</a> 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 <code>sbuf</code>. For example: "1999-11-27 15:49:37,459".
+
+ @param sbuf the <code>StringBuffer</code> 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 <code>null</code>.
+ */
+ public
+ Date parse(java.lang.String s, ParsePosition pos) {
+ return null;
+ }
+}
+