| /* |
| * 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.empire.commons; |
| |
| import java.text.DateFormat; |
| import java.text.ParseException; |
| import java.text.SimpleDateFormat; |
| import java.util.Calendar; |
| import java.util.Date; |
| import java.util.Locale; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * This class contains common functions for comparing and converting values of type Date. |
| * |
| */ |
| public class DateUtils |
| { |
| private static final Logger log = LoggerFactory.getLogger(DateUtils.class); |
| |
| public static final long MILLIS_IN_DAY = 86400000; |
| |
| private DateUtils() |
| { |
| // Static Function only |
| // No instance may be created |
| } |
| |
| /** |
| * Returns the current date without time |
| * @return the date |
| */ |
| public static Date getDateNow() |
| { |
| Calendar calendar = Calendar.getInstance(); |
| calendar.set(Calendar.HOUR_OF_DAY, 0); |
| calendar.set(Calendar.MINUTE, 0); |
| calendar.set(Calendar.SECOND, 0); |
| calendar.set(Calendar.MILLISECOND, 0); |
| return calendar.getTime(); |
| } |
| |
| /** |
| * Returns the current date and time |
| * @return the date |
| */ |
| public static Date getTimeNow() |
| { |
| return Calendar.getInstance().getTime(); |
| } |
| |
| /** |
| * Calculates a date relative to the supplied date. |
| * @param date date to calculate from |
| * @param years number of years to add or subtract from the supplied date |
| * @param months number of months to add or subtract from the supplied date |
| * @param days number of days to add or subtract from the supplied date |
| * @return the target date |
| */ |
| public static Date addDate(Date date, int years, int months, int days) |
| { |
| Calendar calendar = Calendar.getInstance(); |
| if (date!=null) |
| calendar.setTime(date); |
| if (years!=0) |
| calendar.add(Calendar.YEAR, years); |
| if (months!=0) |
| calendar.add(Calendar.MONTH, months); |
| if (days!=0) |
| calendar.add(Calendar.DAY_OF_MONTH, days); |
| return calendar.getTime(); |
| } |
| |
| public static Date setDate(Date date, int year, int month, int day) |
| { |
| Calendar calendar = Calendar.getInstance(); |
| if (date!=null) |
| calendar.setTime(date); |
| if (year>0) |
| calendar.set(Calendar.YEAR, year); |
| if (month>0) |
| calendar.set(Calendar.MONTH, month-1); |
| if (day>0) |
| calendar.set(Calendar.DAY_OF_MONTH, day); |
| return calendar.getTime(); |
| } |
| |
| public static Date getDate(int year, int month, int day) |
| { |
| Calendar calendar = Calendar.getInstance(); |
| if (year>0) |
| calendar.set(Calendar.YEAR, year); |
| if (month>0) |
| calendar.set(Calendar.MONTH, month-1); |
| if (day>0) |
| calendar.set(Calendar.DAY_OF_MONTH, day); |
| // No Time |
| calendar.set(Calendar.HOUR_OF_DAY, 0); |
| calendar.set(Calendar.MINUTE, 0); |
| calendar.set(Calendar.SECOND, 0); |
| calendar.set(Calendar.MILLISECOND, 0); |
| return calendar.getTime(); |
| } |
| |
| public static Date setTime(Date date, int hours, int minutes, int seconds, int millis) |
| { |
| Calendar calendar = Calendar.getInstance(); |
| calendar.setTime(date); |
| calendar.set(Calendar.HOUR_OF_DAY, hours); |
| calendar.set(Calendar.MINUTE, minutes); |
| calendar.set(Calendar.SECOND, seconds); |
| calendar.set(Calendar.MILLISECOND, millis); |
| return calendar.getTime(); |
| } |
| |
| public static Date getDateOnly(Date date) |
| { |
| return setTime(date, 0, 0, 0, 0); |
| } |
| |
| public static long compareDates(Date date1, Date date2) |
| { |
| long time1 = setTime(date1, 0, 0, 0, 0).getTime(); |
| long time2 = setTime(date2, 0, 0, 0, 0).getTime(); |
| time1 = time1 / MILLIS_IN_DAY; |
| time2 = time2 / MILLIS_IN_DAY; |
| return time1-time2; |
| } |
| |
| public static boolean compareEqual(Date date1, Date date2) |
| { |
| return (compareDates(date1, date2)==0); |
| } |
| |
| // ------- parsing functions ----- |
| |
| public static Date parseDate(String sDate, Locale locale) |
| { |
| // Try to parse |
| try |
| { |
| DateFormat df = DateFormat.getDateInstance(DateFormat.SHORT, getSafeLocale(locale)); |
| df.setLenient(true); |
| return df.parse(sDate); |
| } catch (ParseException e) |
| { |
| log.error("Invalid date value", e); |
| return null; |
| } |
| } |
| |
| // ------- formating functions ------- |
| |
| private static Locale getSafeLocale(Locale locale) |
| { |
| return (locale==null) ? Locale.getDefault() : locale; |
| } |
| |
| public static String formatDate(Date d, Locale locale) |
| { |
| DateFormat df = DateFormat.getDateInstance(DateFormat.MEDIUM, getSafeLocale(locale)); |
| return df.format(d); |
| } |
| |
| public static String formatTime(Date d, Locale locale, boolean withSeconds) |
| { |
| int style = (withSeconds ? DateFormat.MEDIUM : DateFormat.SHORT); |
| DateFormat df = DateFormat.getTimeInstance(style, getSafeLocale(locale)); |
| return df.format(d); |
| } |
| |
| public static String formatDayOfWeek(Date d, Locale locale, boolean longFormat) |
| { |
| SimpleDateFormat sdf = new SimpleDateFormat("", getSafeLocale(locale)); |
| Calendar c = Calendar.getInstance(getSafeLocale(locale)); |
| c.setTime(d); |
| int dayOfWeek = c.get(Calendar.DAY_OF_WEEK); |
| if (longFormat) |
| return sdf.getDateFormatSymbols().getWeekdays()[dayOfWeek]; |
| else |
| return sdf.getDateFormatSymbols().getShortWeekdays()[dayOfWeek]; |
| } |
| |
| public static String formatMonth(Date d, Locale locale, boolean longFormat) |
| { |
| SimpleDateFormat sdf = new SimpleDateFormat("", getSafeLocale(locale)); |
| Calendar c = Calendar.getInstance(getSafeLocale(locale)); |
| c.setTime(d); |
| int month = c.get(Calendar.MONTH); |
| if (longFormat) |
| return sdf.getDateFormatSymbols().getMonths()[month]; |
| else |
| return sdf.getDateFormatSymbols().getShortMonths()[month]; |
| } |
| |
| public static int getWeekOfYear(Date d, Locale locale) |
| { |
| Calendar c = Calendar.getInstance(getSafeLocale(locale)); |
| c.setTime(d); |
| return c.get(Calendar.WEEK_OF_YEAR); |
| } |
| |
| public static String formatMonth(int month, Locale locale, boolean longFormat) |
| { |
| SimpleDateFormat sdf = new SimpleDateFormat("", getSafeLocale(locale)); |
| if (longFormat) |
| return sdf.getDateFormatSymbols().getMonths()[month]; |
| else |
| return sdf.getDateFormatSymbols().getShortMonths()[month]; |
| } |
| |
| public static String formatYear(Date d, Locale locale) |
| { |
| SimpleDateFormat sdf = new SimpleDateFormat("yyyy", getSafeLocale(locale)); |
| Calendar c = Calendar.getInstance(getSafeLocale(locale)); |
| c.setTime(d); |
| return sdf.format(d); |
| } |
| } |