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/**
* The MIT License
*
* Copyright (C) 2015 Asterios Raptis
*
* 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 de.alpharogroup.random.date;
import java.security.SecureRandom;
import java.sql.Timestamp;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.Random;
import de.alpharogroup.date.CalculateDateExtensions;
import de.alpharogroup.random.RandomExtensions;
import lombok.experimental.UtilityClass;
/**
* The class {@link RandomDateExtensions} is a utility class for creating random random dates.
*
* @version 1.0
* @author Asterios Raptis
*/
@UtilityClass
public class RandomDateExtensions
{
/**
* Creates a random Date that is after from the given Date.
*
* @param date
* The Date from where to compute the future date.
*
* @return The random Date in the future.
*/
public static Date dateAfter(final Date date)
{
return dateAfter(date, RandomExtensions.randomInt(10000));
}
/**
* Creates a random Date that is after from the given Date.
*
* @param date
* The Date from where to compute the future date.
* @param range
* The range.
*
* @return The random Date in the future.
*/
public static Date dateAfter(final Date date, final int range)
{
return CalculateDateExtensions.addDays(date, RandomExtensions.randomInt(range));
}
/**
* Creates a random date that is before from the given date.
*
* @param date
* The date from where to compute the Past date.
*
* @return The random Date in the past.
*/
public static Date dateBefore(final Date date)
{
return dateBefore(date, 10000);
}
/**
* Creates a random date that is before from the given date.
*
* @param date
* The date from where to compute the past date.
* @param range
* The range.
*
* @return The random Date in the past.
*/
public static Date dateBefore(final Date date, final int range)
{
return CalculateDateExtensions.substractDaysFromDate(date, range);
}
/**
* Creates a java.sql.Timestamp from now.
*
* @return Timestamp.
*/
public static Timestamp getTimestamp()
{
return getTimestamp(new Date());
}
/**
* Creates a java.sql.Timestamp(to match the ones in the database) from the given date.
*
* @param date
* The date
*
* @return Timestamp.
*/
public static Timestamp getTimestamp(final Date date)
{
final Calendar gregCal = new GregorianCalendar();
gregCal.setTime(date);
gregCal.set(Calendar.HOUR_OF_DAY, 0);
gregCal.set(Calendar.MINUTE, 0);
gregCal.set(Calendar.SECOND, 0);
gregCal.set(Calendar.MILLISECOND, 0);
return new Timestamp(gregCal.getTime().getTime());
}
/**
* Creates a random birthday-date between 9 and 55 years.
*
* @return 's the random date.
*/
public static Date randomBirthday()
{
final Date now = new Date(System.currentTimeMillis());
// About 55 years.
final Date past = dateBefore(now, 20000);
// About 9 years.
final Date recentlyPast = dateBefore(now, 3000);
final Date randomBirthday = randomBirthday(recentlyPast, past);
return randomBirthday;
}
/**
* Creates a random birthday-date between the two given date-objects.
*
* @param from
* The date from where to start.
* @param till
* The date from where to end.
* @return 's the random date.
*/
public static Date randomBirthday(final Date from, final Date till)
{
final Date randomBirthday = randomDatebetween(from, till);
return randomBirthday;
}
/**
* Creates a random date.
*
* @param from
* The date from where to begin.
* @return The random date.
*/
public static Date randomDate(final Date from)
{
final Random secrand = new SecureRandom();
final double randDouble = -secrand.nextDouble() * from.getTime();
final double randomDouble = from.getTime() - secrand.nextDouble();
final double result = (randDouble / 99999) * (randomDouble / 99999);
return new Date((long)result);
}
/**
* Creates a random Date between the range from start and end.
*
* @param start
* The Date from where the range starts.
* @param end
* The Date from where the range ends.
* @return A random Date between the range from start and end.
*/
public static Date randomDatebetween(final Date start, final Date end)
{
final Random secran = new SecureRandom();
final long randomLong = (long)(start.getTime()
+ (secran.nextDouble() * (end.getTime() - start.getTime())));
return new Date(randomLong);
}
/**
* Creates a random Date between the range from startDays and endDays from the given Date and
* gives it back as a string to the default "dd.MM.yyyy HH:mm:ss" format.
*
* @param startDate
* The date from where to start as a long.
* @param endDate
* The date from where to end as a long.
* @return The random date as a String.
*/
public static String randomDatebetween(final long startDate, final long endDate)
{
return randomDatebetween(startDate, endDate, "dd.MM.yyyy HH:mm:ss");
}
/**
* Creates a random Date between the range from startDays and endDays from the given Date and
* gives it back as a string to the given format.
*
* @param startDate
* The date from where to start as a long.
* @param endDate
* The date from where to end as a long.
* @param format
* The format for the date.
* @return The random date as a String.
*/
public static String randomDatebetween(final long startDate, final long endDate,
final String format)
{
final Random secrand = new SecureRandom();
final SimpleDateFormat sdf = new SimpleDateFormat(format);
final long randomLong = (long)(startDate + (secrand.nextDouble() * (endDate - startDate)));
return sdf.format(new Date(randomLong));
}
/**
* Creates a random Date between the range from startDays and endDays from the given Date.
*
* @param from
* The Date from where to the random Date to start.
* @param startDays
* The int that represents the days from where the range starts.
* @param endDays
* The int that represents the days from where the range ends.
* @return A random Date between the range from startDays and endDays from the given Date.
*/
public static Date randomDateBetween(final Date from, final int startDays, final int endDays)
{
return dateAfter(from, RandomExtensions.randomIntBetween(startDays, endDays));
}
}
