Mega Code Archive
Date format for face book
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/*
* Copyright (c) 2010-2011 Mark Allen.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
//package com.restfb.util;
import static java.util.logging.Level.FINE;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.logging.Logger;
/**
* A collection of date-handling utility methods.
*
* @author <a href="http://restfb.com">Mark Allen</a>
* @since 1.6
*/
public final class DateUtils {
/**
* Facebook "long" date format (IETF RFC 3339). Example:
* {@code 2010-02-28T16:11:08+0000}
*/
public static final String FACEBOOK_LONG_DATE_FORMAT = "yyyy-MM-dd'T'HH:mm:ssZ";
/**
* Facebook "long" date format (IETF RFC 3339) without a timezone component.
* Example: {@code 2010-02-28T16:11:08}
*/
public static final String FACEBOOK_LONG_DATE_FORMAT_WITHOUT_TIMEZONE = "yyyy-MM-dd'T'HH:mm:ss";
/**
* Facebook short date format. Example: {@code 04/15/1984}
*/
public static final String FACEBOOK_SHORT_DATE_FORMAT = "MM/dd/yyyy";
/**
* Facebook month-year only date format. Example: {@code Example: 2007-03}
*/
public static final String FACEBOOK_MONTH_YEAR_DATE_FORMAT = "yyyy-MM";
/**
* Logger.
*/
private static final Logger logger = Logger.getLogger(DateUtils.class.getName());
/**
* Prevents instantiation.
*/
private DateUtils() {}
/**
* Returns a Java representation of a Facebook "long" {@code date} string.
* <p>
* Supports dates with or without timezone information.
*
* @param date
* Facebook {@code date} string.
* @return Java date representation of the given Facebook "long" {@code date}
* string or {@code null} if {@code date} is {@code null} or invalid.
*/
public static Date toDateFromLongFormat(String date) {
Date parsedDate = toDateWithFormatString(date, FACEBOOK_LONG_DATE_FORMAT);
if (parsedDate == null)
parsedDate = toDateWithFormatString(date, FACEBOOK_LONG_DATE_FORMAT_WITHOUT_TIMEZONE);
return parsedDate;
}
/**
* Returns a Java representation of a Facebook "short" {@code date} string.
*
* @param date
* Facebook {@code date} string.
* @return Java date representation of the given Facebook "short" {@code date}
* string or {@code null} if {@code date} is {@code null} or invalid.
*/
public static Date toDateFromShortFormat(String date) {
return toDateWithFormatString(date, FACEBOOK_SHORT_DATE_FORMAT);
}
/**
* Returns a Java representation of a Facebook "month-year" {@code date}
* string.
*
* @param date
* Facebook {@code date} string.
* @return Java date representation of the given Facebook "month-year"
* {@code date} string or {@code null} if {@code date} is {@code null}
* or invalid.
*/
public static Date toDateFromMonthYearFormat(String date) {
if ("0000-00".equals(date))
return null;
return toDateWithFormatString(date, FACEBOOK_MONTH_YEAR_DATE_FORMAT);
}
/**
* Returns a Java representation of a {@code date} string.
*
* @param date
* Date in string format.
* @return Java date representation of the given {@code date} string or
* {@code null} if {@code date} is {@code null} or invalid.
*/
private static Date toDateWithFormatString(String date, String format) {
if (date == null)
return null;
try {
return new SimpleDateFormat(format).parse(date);
} catch (ParseException e) {
if (logger.isLoggable(FINE))
logger.fine("Unable to parse date '" + date + "' using format string '" + format + "': " + e);
return null;
}
}
}
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