michael@0: /**
michael@0:  * Copyright (c) 2012, Ben Fortuna
michael@0:  * All rights reserved.
michael@0:  *
michael@0:  * Redistribution and use in source and binary forms, with or without
michael@0:  * modification, are permitted provided that the following conditions
michael@0:  * are met:
michael@0:  *
michael@0:  *  o Redistributions of source code must retain the above copyright
michael@0:  * notice, this list of conditions and the following disclaimer.
michael@0:  *
michael@0:  *  o Redistributions in binary form must reproduce the above copyright
michael@0:  * notice, this list of conditions and the following disclaimer in the
michael@0:  * documentation and/or other materials provided with the distribution.
michael@0:  *
michael@0:  *  o Neither the name of Ben Fortuna nor the names of any other contributors
michael@0:  * may be used to endorse or promote products derived from this software
michael@0:  * without specific prior written permission.
michael@0:  *
michael@0:  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
michael@0:  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
michael@0:  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
michael@0:  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
michael@0:  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
michael@0:  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
michael@0:  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
michael@0:  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
michael@0:  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
michael@0:  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
michael@0:  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
michael@0:  */
michael@0: package net.fortuna.ical4j.model;
michael@0: 
michael@0: import java.text.DateFormat;
michael@0: import java.text.ParseException;
michael@0: import java.text.SimpleDateFormat;
michael@0: import java.util.Map;
michael@0: import java.util.WeakHashMap;
michael@0: 
michael@0: import net.fortuna.ical4j.util.CompatibilityHints;
michael@0: import net.fortuna.ical4j.util.Dates;
michael@0: import net.fortuna.ical4j.util.TimeZones;
michael@0: 
michael@4: import org.apache.commons.lang3.builder.EqualsBuilder;
michael@0: 
michael@0: /**
michael@0:  * $Id$
michael@0:  * 
michael@0:  * Created on 26/06/2005
michael@0:  * 
michael@0:  * Represents a time of day on a specific date.
michael@0:  * 
michael@0:  * <pre>
michael@0:  * 4.3.5   Date-Time
michael@0:  * 
michael@0:  *    Value Name: DATE-TIME
michael@0:  * 
michael@0:  *    Purpose: This value type is used to identify values that specify a
michael@0:  *    precise calendar date and time of day.
michael@0:  * 
michael@0:  *    Formal Definition: The value type is defined by the following
michael@0:  *    notation:
michael@0:  * 
michael@0:  *      date-time  = date "T" time ;As specified in the date and time
michael@0:  *                                 ;value definitions
michael@0:  * 
michael@0:  *    Description: If the property permits, multiple "date-time" values are
michael@0:  *    specified as a COMMA character (US-ASCII decimal 44) separated list
michael@0:  *    of values. No additional content value encoding (i.e., BACKSLASH
michael@0:  *    character encoding) is defined for this value type.
michael@0:  * 
michael@0:  *    The "DATE-TIME" data type is used to identify values that contain a
michael@0:  *    precise calendar date and time of day. The format is based on the
michael@0:  *    [ISO 8601] complete representation, basic format for a calendar date
michael@0:  *    and time of day. The text format is a concatenation of the "date",
michael@0:  *    followed by the LATIN CAPITAL LETTER T character (US-ASCII decimal
michael@0:  *    84) time designator, followed by the "time" format.
michael@0:  * 
michael@0:  *    The "DATE-TIME" data type expresses time values in three forms:
michael@0:  * 
michael@0:  *    The form of date and time with UTC offset MUST NOT be used. For
michael@0:  *    example, the following is not valid for a date-time value:
michael@0:  * 
michael@0:  *      DTSTART:19980119T230000-0800       ;Invalid time format
michael@0:  * 
michael@0:  *    FORM #1: DATE WITH LOCAL TIME
michael@0:  * 
michael@0:  *    The date with local time form is simply a date-time value that does
michael@0:  *    not contain the UTC designator nor does it reference a time zone. For
michael@0:  *    example, the following represents Janurary 18, 1998, at 11 PM:
michael@0:  * 
michael@0:  *      DTSTART:19980118T230000
michael@0:  * 
michael@0:  *    Date-time values of this type are said to be "floating" and are not
michael@0:  *    bound to any time zone in particular. They are used to represent the
michael@0:  *    same hour, minute, and second value regardless of which time zone is
michael@0:  *    currently being observed. For example, an event can be defined that
michael@0:  *    indicates that an individual will be busy from 11:00 AM to 1:00 PM
michael@0:  *    every day, no matter which time zone the person is in. In these
michael@0:  *    cases, a local time can be specified. The recipient of an iCalendar
michael@0:  *    object with a property value consisting of a local time, without any
michael@0:  *    relative time zone information, SHOULD interpret the value as being
michael@0:  *    fixed to whatever time zone the ATTENDEE is in at any given moment.
michael@0:  *    This means that two ATTENDEEs, in different time zones, receiving the
michael@0:  *    same event definition as a floating time, may be participating in the
michael@0:  *    event at different actual times. Floating time SHOULD only be used
michael@0:  *    where that is the reasonable behavior.
michael@0:  * 
michael@0:  *    In most cases, a fixed time is desired. To properly communicate a
michael@0:  *    fixed time in a property value, either UTC time or local time with
michael@0:  *    time zone reference MUST be specified.
michael@0:  * 
michael@0:  *    The use of local time in a DATE-TIME value without the TZID property
michael@0:  *    parameter is to be interpreted as floating time, regardless of the
michael@0:  *    existence of "VTIMEZONE" calendar components in the iCalendar object.
michael@0:  * 
michael@0:  *    FORM #2: DATE WITH UTC TIME
michael@0:  * 
michael@0:  *    The date with UTC time, or absolute time, is identified by a LATIN
michael@0:  *    CAPITAL LETTER Z suffix character (US-ASCII decimal 90), the UTC
michael@0:  *    designator, appended to the time value. For example, the following
michael@0:  *    represents January 19, 1998, at 0700 UTC:
michael@0:  * 
michael@0:  *      DTSTART:19980119T070000Z
michael@0:  * 
michael@0:  *    The TZID property parameter MUST NOT be applied to DATE-TIME
michael@0:  *    properties whose time values are specified in UTC.
michael@0:  * 
michael@0:  *    FORM #3: DATE WITH LOCAL TIME AND TIME ZONE REFERENCE
michael@0:  * 
michael@0:  *    The date and local time with reference to time zone information is
michael@0:  *    identified by the use the TZID property parameter to reference the
michael@0:  *    appropriate time zone definition. TZID is discussed in detail in the
michael@0:  *    section on Time Zone. For example, the following represents 2 AM in
michael@0:  *    New York on Janurary 19, 1998:
michael@0:  * 
michael@0:  *           DTSTART;TZID=US-Eastern:19980119T020000
michael@0:  * 
michael@0:  *    Example: The following represents July 14, 1997, at 1:30 PM in New
michael@0:  *    York City in each of the three time formats, using the "DTSTART"
michael@0:  *    property.
michael@0:  * 
michael@0:  *      DTSTART:19970714T133000            ;Local time
michael@0:  *      DTSTART:19970714T173000Z           ;UTC time
michael@0:  *      DTSTART;TZID=US-Eastern:19970714T133000    ;Local time and time
michael@0:  *                         ; zone reference
michael@0:  * 
michael@0:  *    A time value MUST ONLY specify 60 seconds when specifying the
michael@0:  *    periodic "leap second" in the time value. For example:
michael@0:  * 
michael@0:  *      COMPLETED:19970630T235960Z
michael@0:  * </pre>
michael@0:  * 
michael@0:  * @author Ben Fortuna
michael@0:  */
michael@0: public class DateTime extends Date {
michael@0: 
michael@0: 	private static final long serialVersionUID = -6407231357919440387L;
michael@0: 
michael@0: 	private static final String DEFAULT_PATTERN = "yyyyMMdd'T'HHmmss";
michael@0: 
michael@0: 	private static final String UTC_PATTERN = "yyyyMMdd'T'HHmmss'Z'";
michael@3: 	
michael@3: 	private static final String VCARD_PATTERN = "yyyy'-'MM'-'dd'T'HH':'mm':'ss'Z'";
michael@0: 
michael@0: 	private static final String RELAXED_PATTERN = "yyyyMMdd";
michael@0: 
michael@0: 	/**
michael@0: 	 * Used for parsing times in a UTC date-time representation.
michael@0: 	 */
michael@0: 	private static final DateFormatCache UTC_FORMAT;
michael@0: 	static {
michael@0: 		final DateFormat format = new SimpleDateFormat(UTC_PATTERN);
michael@0: 		format.setTimeZone(TimeZones.getUtcTimeZone());
michael@0: 		format.setLenient(false);
michael@0: 
michael@0: 		UTC_FORMAT = new DateFormatCache(format);
michael@0: 	}
michael@0: 
michael@0: 	/**
michael@0: 	 * Used for parsing times in a local date-time representation.
michael@0: 	 */
michael@0: 	private static final DateFormatCache DEFAULT_FORMAT;
michael@0: 	static {
michael@0: 		final DateFormat format = new SimpleDateFormat(DEFAULT_PATTERN);
michael@0: 		format.setLenient(false);
michael@0: 		DEFAULT_FORMAT = new DateFormatCache(format);
michael@0: 	}
michael@0: 
michael@0: 	private static final DateFormatCache LENIENT_DEFAULT_FORMAT;
michael@0: 	static {
michael@0: 		final DateFormat format = new SimpleDateFormat(DEFAULT_PATTERN);
michael@0: 		LENIENT_DEFAULT_FORMAT = new DateFormatCache(format);
michael@0: 	}
michael@0: 
michael@0: 	private static final DateFormatCache RELAXED_FORMAT;
michael@0: 	static {
michael@0: 		final DateFormat format = new SimpleDateFormat(RELAXED_PATTERN);
michael@3: 		format.setLenient(true);
michael@0: 		RELAXED_FORMAT = new DateFormatCache(format);
michael@0: 	}
michael@0: 
michael@3: 	private static final DateFormatCache VCARD_FORMAT;
michael@3: 	static {
michael@3: 		final DateFormat format = new SimpleDateFormat(VCARD_PATTERN);
michael@3:         VCARD_FORMAT = new DateFormatCache(format);
michael@3: 	}
michael@3: 
michael@0: 	private Time time;
michael@0: 
michael@0: 	private TimeZone timezone;
michael@0: 
michael@0: 	/**
michael@0: 	 * Default constructor.
michael@0: 	 */
michael@0: 	public DateTime() {
michael@0: 		super(Dates.PRECISION_SECOND, java.util.TimeZone.getDefault());
michael@0: 		this.time = new Time(getTime(), getFormat().getTimeZone());
michael@0: 	}
michael@0: 
michael@0: 	/**
michael@0: 	 * @param utc
michael@0: 	 *            indicates if the date is in UTC time
michael@0: 	 */
michael@0: 	public DateTime(final boolean utc) {
michael@0: 		this();
michael@0: 		setUtc(utc);
michael@0: 	}
michael@0: 
michael@0: 	/**
michael@0: 	 * @param time
michael@0: 	 *            a date-time value in milliseconds
michael@0: 	 */
michael@0: 	public DateTime(final long time) {
michael@0: 		super(time, Dates.PRECISION_SECOND, java.util.TimeZone.getDefault());
michael@0: 		this.time = new Time(time, getFormat().getTimeZone());
michael@0: 	}
michael@0: 
michael@0: 	/**
michael@0: 	 * @param date
michael@0: 	 *            a date-time value
michael@0: 	 */
michael@0: 	public DateTime(final java.util.Date date) {
michael@0: 		super(date.getTime(), Dates.PRECISION_SECOND, java.util.TimeZone.getDefault());
michael@0: 		this.time = new Time(date.getTime(), getFormat().getTimeZone());
michael@0: 		// copy timezone information if applicable..
michael@0: 		if (date instanceof DateTime) {
michael@0: 			final DateTime dateTime = (DateTime) date;
michael@0: 			if (dateTime.isUtc()) {
michael@0: 				setUtc(true);
michael@0: 			} else {
michael@0: 				setTimeZone(dateTime.getTimeZone());
michael@0: 			}
michael@0: 		}
michael@0: 	}
michael@0: 
michael@0: 	/**
michael@0: 	 * Constructs a new DateTime instance from parsing the specified string
michael@0: 	 * representation in the default (local) timezone.
michael@0: 	 * 
michael@0: 	 * @param value
michael@0: 	 *            a string representation of a date-time
michael@0: 	 * @throws ParseException
michael@0: 	 *             where the specified string is not a valid date-time
michael@0: 	 */
michael@0: 	public DateTime(final String value) throws ParseException {
michael@0: 		this(value, null);
michael@0: 		/*
michael@0: 		 * long time = 0; try { synchronized (UTC_FORMAT) { time =
michael@0: 		 * UTC_FORMAT.parse(value).getTime(); } setUtc(true); } catch
michael@0: 		 * (ParseException pe) { synchronized (DEFAULT_FORMAT) {
michael@0: 		 * DEFAULT_FORMAT.setTimeZone(getFormat().getTimeZone()); time =
michael@0: 		 * DEFAULT_FORMAT.parse(value).getTime(); } this.time = new Time(time,
michael@0: 		 * getFormat().getTimeZone()); } setTime(time);
michael@0: 		 */
michael@0: 	}
michael@0: 
michael@0: 	/**
michael@0: 	 * Creates a new date-time instance from the specified value in the given
michael@0: 	 * timezone. If a timezone is not specified, the default timezone (as
michael@0: 	 * returned by {@link java.util.TimeZone#getDefault()}) is used.
michael@0: 	 * 
michael@0: 	 * @param value
michael@0: 	 *            a string representation of a date-time
michael@0: 	 * @param timezone
michael@0: 	 *            the timezone for the date-time instance
michael@0: 	 * @throws ParseException
michael@0: 	 *             where the specified string is not a valid date-time
michael@0: 	 */
michael@0: 	public DateTime(final String value, final TimeZone timezone)
michael@0: 			throws ParseException {
michael@0: 		// setting the time to 0 since we are going to reset it anyway
michael@0: 		super(0, Dates.PRECISION_SECOND, timezone != null ? timezone
michael@0: 				: java.util.TimeZone.getDefault());
michael@0: 		this.time = new Time(getTime(), getFormat().getTimeZone());
michael@0: 
michael@0:         try {
michael@0:             if (value.endsWith("Z")) {
michael@0:                 setTime(value, (DateFormat) UTC_FORMAT.get(), null);
michael@0:                 setUtc(true);
michael@0:             } else {
michael@0:                 if (timezone != null) {
michael@0:                     setTime(value, (DateFormat) DEFAULT_FORMAT.get(), timezone);
michael@0:                 } else {
michael@0:                     // Use lenient parsing for floating times. This is to
michael@0:                     // overcome
michael@0:                     // the problem of parsing VTimeZone dates that specify dates
michael@0:                     // that the strict parser does not accept.
michael@0:                     setTime(value, (DateFormat) LENIENT_DEFAULT_FORMAT.get(),
michael@0:                             getFormat().getTimeZone());
michael@0:                 }
michael@0:                 setTimeZone(timezone);
michael@0:             }
michael@0:         } catch (ParseException pe) {
michael@3:             if (CompatibilityHints.isHintEnabled(CompatibilityHints.KEY_VCARD_COMPATIBILITY)) {
michael@0: 
michael@3:             	try {
michael@3: 	                setTime(value, (DateFormat) VCARD_FORMAT.get(), timezone);
michael@3: 	                setTimeZone(timezone);
michael@3:             	} catch (ParseException pe2) {
michael@3:                     if (CompatibilityHints.isHintEnabled(CompatibilityHints.KEY_RELAXED_PARSING)) {
michael@3:     	                setTime(value, (DateFormat) RELAXED_FORMAT.get(), timezone);
michael@3:     	                setTimeZone(timezone);
michael@3:                     }            		
michael@3:             	}
michael@3:             } else if (CompatibilityHints.isHintEnabled(CompatibilityHints.KEY_RELAXED_PARSING)) {
michael@0:                 setTime(value, (DateFormat) RELAXED_FORMAT.get(), timezone);
michael@0:                 setTimeZone(timezone);
michael@0:             } else {
michael@0:                 throw pe;
michael@0:             }
michael@0:         }
michael@0:     }
michael@0: 
michael@0: 	/**
michael@0: 	 * @param value
michael@0: 	 *            a string representation of a date-time
michael@0: 	 * @param pattern
michael@0: 	 *            a pattern to apply when parsing the date-time value
michael@0: 	 * @param timezone
michael@0: 	 *            the timezone for the date-time instance
michael@0: 	 * @throws ParseException
michael@0: 	 *             where the specified string is not a valid date-time
michael@0: 	 */
michael@0: 	public DateTime(String value, String pattern, TimeZone timezone)
michael@0: 			throws ParseException {
michael@0: 		// setting the time to 0 since we are going to reset it anyway
michael@0: 		super(0, Dates.PRECISION_SECOND, timezone != null ? timezone
michael@0: 				: java.util.TimeZone.getDefault());
michael@0: 		this.time = new Time(getTime(), getFormat().getTimeZone());
michael@0: 
michael@0: 		final DateFormat format = CalendarDateFormatFactory
michael@0: 				.getInstance(pattern);
michael@0: 		setTime(value, format, timezone);
michael@0: 	}
michael@0: 
michael@0: 	/**
michael@0: 	 * @param value
michael@0: 	 *            a string representation of a date-time
michael@0: 	 * @param pattern
michael@0: 	 *            a pattern to apply when parsing the date-time value
michael@0: 	 * @param utc
michael@0: 	 *            indicates whether the date-time is in UTC time
michael@0: 	 * @throws ParseException
michael@0: 	 *             where the specified string is not a valid date-time
michael@0: 	 */
michael@0: 	public DateTime(String value, String pattern, boolean utc)
michael@0: 			throws ParseException {
michael@0:                 // setting the time to 0 since we are going to reset it anyway
michael@0: 		this(0);
michael@0: 		final DateFormat format = CalendarDateFormatFactory
michael@0: 				.getInstance(pattern);
michael@0: 		if (utc) {
michael@0: 			setTime(value, format,
michael@0: 					((DateFormat) UTC_FORMAT.get()).getTimeZone());
michael@0: 		} else {
michael@0: 			setTime(value, format, null);
michael@0: 		}
michael@0: 		setUtc(utc);
michael@0: 	}
michael@0: 
michael@0: 	/**
michael@0: 	 * Internal set of time by parsing value string.
michael@0: 	 * 
michael@0: 	 * @param value
michael@0: 	 * @param format
michael@0: 	 *            a {@code DateFormat}, protected by the use of a ThreadLocal.
michael@0: 	 * @param tz
michael@0: 	 * @throws ParseException
michael@0: 	 */
michael@0: 	private void setTime(final String value, final DateFormat format,
michael@0: 			final java.util.TimeZone tz) throws ParseException {
michael@0: 
michael@0: 		if (tz != null) {
michael@0: 			format.setTimeZone(tz);
michael@0: 		}
michael@0: 		setTime(format.parse(value).getTime());
michael@0: 	}
michael@0: 
michael@0: 	/**
michael@0: 	 * {@inheritDoc}
michael@0: 	 */
michael@0: 	public final void setTime(final long time) {
michael@0: 		super.setTime(time);
michael@0: 		// need to check for null time due to Android java.util.Date(long)
michael@0: 		// constructor
michael@0: 		// calling this method..
michael@0: 		if (this.time != null) {
michael@0: 			this.time.setTime(time);
michael@0: 		}
michael@0: 	}
michael@0: 
michael@0: 	/**
michael@0: 	 * @return Returns the utc.
michael@0: 	 */
michael@0: 	public final boolean isUtc() {
michael@0: 		return time.isUtc();
michael@0: 	}
michael@0: 
michael@0: 	/**
michael@0: 	 * Updates this date-time to display in UTC time if the argument is true.
michael@0: 	 * Otherwise, resets to the default timezone.
michael@0: 	 * 
michael@0: 	 * @param utc
michael@0: 	 *            The utc to set.
michael@0: 	 */
michael@0: 	public final void setUtc(final boolean utc) {
michael@0: 		// reset the timezone associated with this instance..
michael@0: 		this.timezone = null;
michael@0: 		if (utc) {
michael@0: 			getFormat().setTimeZone(TimeZones.getUtcTimeZone());
michael@0: 		} else {
michael@0: 			resetTimeZone();
michael@0: 		}
michael@0: 		time = new Time(time, getFormat().getTimeZone(), utc);
michael@0: 	}
michael@0: 
michael@0: 	/**
michael@0: 	 * Sets the timezone associated with this date-time instance. If the
michael@0: 	 * specified timezone is null, it will reset to the default timezone. If the
michael@0: 	 * date-time instance is utc, it will turn into either a floating (no
michael@0: 	 * timezone) date-time, or a date-time with a timezone.
michael@0: 	 * 
michael@0: 	 * @param timezone
michael@0: 	 *            a timezone to apply to the instance
michael@0: 	 */
michael@0: 	public final void setTimeZone(final TimeZone timezone) {
michael@0: 		this.timezone = timezone;
michael@0: 		if (timezone != null) {
michael@0: 			getFormat().setTimeZone(timezone);
michael@0: 		} else {
michael@0: 			resetTimeZone();
michael@0: 		}
michael@0: 		time = new Time(time, getFormat().getTimeZone(), false);
michael@0: 	}
michael@0: 
michael@0: 	/**
michael@0: 	 * Reset the timezone to default.
michael@0: 	 */
michael@0: 	private void resetTimeZone() {
michael@0: 		// use GMT timezone to avoid daylight savings rules affecting floating
michael@0: 		// time values..
michael@0: 		getFormat().setTimeZone(TimeZone.getDefault());
michael@0: 		// getFormat().setTimeZone(TimeZone.getTimeZone(TimeZones.GMT_ID));
michael@0: 	}
michael@0: 
michael@0: 	/**
michael@0: 	 * Returns the current timezone associated with this date-time value.
michael@0: 	 * 
michael@0: 	 * @return a Java timezone
michael@0: 	 */
michael@0: 	public final TimeZone getTimeZone() {
michael@0: 		return timezone;
michael@0: 	}
michael@0: 
michael@0: 	/**
michael@0: 	 * {@inheritDoc}
michael@0: 	 */
michael@0: 	public final String toString() {
michael@0: 		final StringBuffer b = new StringBuffer(super.toString());
michael@0: 		b.append('T');
michael@0: 		b.append(time.toString());
michael@0: 		return b.toString();
michael@0: 	}
michael@0: 
michael@0: 	/**
michael@0: 	 * {@inheritDoc}
michael@0: 	 */
michael@0: 	public boolean equals(final Object arg0) {
michael@0: 		// TODO: what about compareTo, before, after, etc.?
michael@0: 
michael@0: 		if (arg0 instanceof DateTime) {
michael@0: 			return new EqualsBuilder().append(time, ((DateTime) arg0).time)
michael@0: 					.isEquals();
michael@0: 		}
michael@0: 		return super.equals(arg0);
michael@0: 	}
michael@0: 
michael@0: 	/**
michael@0: 	 * {@inheritDoc}
michael@0: 	 */
michael@0: 	public int hashCode() {
michael@0: 		return super.hashCode();
michael@0: 	}
michael@0: 
michael@0: 	private static class DateFormatCache {
michael@0: 
michael@0: 		private final Map threadMap = new WeakHashMap();
michael@0: 
michael@0: 		private final DateFormat templateFormat;
michael@0: 
michael@0: 		private DateFormatCache(DateFormat dateFormat) {
michael@0: 			this.templateFormat = dateFormat;
michael@0: 		}
michael@0: 
michael@0: 		public DateFormat get() {
michael@0: 			DateFormat dateFormat = (DateFormat) threadMap.get(Thread
michael@0: 					.currentThread());
michael@0: 			if (dateFormat == null) {
michael@0: 				dateFormat = (DateFormat) templateFormat.clone();
michael@0: 				threadMap.put(Thread.currentThread(), dateFormat);
michael@0: 			}
michael@0: 			return dateFormat;
michael@0: 		}
michael@0: 	}
michael@0: }