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Common Date Calculator Code
/*
* ObjectLab, http://www.objectlab.co.uk/open is sponsoring the ObjectLab Kit.
*
* Based in London, we are world leaders in the design and development
* of bespoke applications for the securities financing markets.
*
* Click here to learn more
* ___ _ _ _ _ _
* / _ \| |__ (_) ___ ___| |_| | __ _| |__
* | | | | '_ \| |/ _ \/ __| __| | / _` | '_ \
* | |_| | |_) | | __/ (__| |_| |__| (_| | |_) |
* \___/|_.__// |\___|\___|\__|_____\__,_|_.__/
* |__/
*
* www.ObjectLab.co.uk
*
* $Id: Utils.java 298 2010-03-13 00:49:41Z benoitx $
*
* Copyright 2006 the original author or authors.
*
* Licensed 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 net.objectlab.kit.datecalc.common;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
/**
* Utilities class for Date/Calendar conversions
*
* @author Marcin Jekot
* @author $LastModifiedBy$
* @version $Revision: 298 $ $Date: 2010-03-12 19:49:41 -0500 (Fri, 12 Mar 2010) $
*
*/
public final class Utils {
private static final String DATE_PATTERN = "yyyy-MM-dd";
private Utils() {
}
/**
* Removes set's all "time" fields to zero, leaving only the date portion of
* the Calendar. The Calendar passe
*
* @param cal
* to Calendar object to blast, note, it will be modified
* @return the calendar object modified (same instance)
*/
public static Calendar blastTime(final Calendar cal) {
cal.set(Calendar.HOUR_OF_DAY, 0);
cal.set(Calendar.MINUTE, 0);
cal.set(Calendar.SECOND, 0);
cal.set(Calendar.MILLISECOND, 0);
return cal;
}
/**
* Creates a Date object given a string representation of it
*
* @param dateStr
* string (return today if string is null)
* @return today if string is null, a Date object representing the string
* otherwise
* @throws IllegalArgumentException
* if the string cannot be parsed.
*/
public static Date createDate(final String dateStr) {
if (dateStr == null) {
return createCalendar(null).getTime();
}
return getCal(dateStr).getTime();
}
// -----------------------------------------------------------------------
//
// ObjectLab, world leaders in the design and development of bespoke
// applications for the securities financing markets.
// www.ObjectLab.co.uk
//
// -----------------------------------------------------------------------
/**
* get a new Calendar based on the string date.
* @param dateStr
* the date string
* @return a new Calendar
* @throws IllegalArgumentException
* if the string cannot be parsed.
*/
public static Calendar createCalendar(final String dateStr) {
if (dateStr == null) {
return blastTime(Calendar.getInstance());
}
return getCal(dateStr);
}
public static Calendar getCal(final String dateStr) {
try {
final Date date = new SimpleDateFormat(DATE_PATTERN).parse(dateStr);
return getCal(date);
} catch (final ParseException e) {
throw new IllegalArgumentException("\"" + dateStr + "\"" + " is an invalid date, the pattern is : " + DATE_PATTERN, e);
}
}
/**
* Get a Calendar object for a given Date representation.
*
* @param date
* @return the Calendar
*/
public static Calendar getCal(final Date date) {
if (date == null) {
return null;
}
final Calendar cal = Calendar.getInstance();
cal.setTime(date);
return blastTime(cal);
}
/**
* Converts a Set of Date objects to a Set of Calendar objects.
*
* @param dates
* @return the converted Set
*/
public static Set toCalendarSet(final Set dates) {
final Set calendars = new HashSet();
for (final Date date : dates) {
calendars.add(getCal(date));
}
return calendars;
}
/**
* Converts a Set of Date objects to a Set of Calendar objects.
*
* @param dates
* @return the converted Set
*/
public static HolidayCalendar toHolidayCalendarSet(final HolidayCalendar dates) {
final Set calendars = new HashSet();
for (final Date date : dates.getHolidays()) {
calendars.add(getCal(date));
}
final HolidayCalendar cal = new DefaultHolidayCalendar(calendars, getCal(dates.getEarlyBoundary()),
getCal(dates.getLateBoundary()));
return cal;
}
/**
* Converts a Set of Calendar objects to a Set of Date objects
*
* @param calendars
* @return the converset Set
*/
public static Set toDateSet(final Set calendars) {
final Set dates = new HashSet();
for (final Calendar calendar : calendars) {
dates.add(calendar.getTime());
}
return dates;
}
/**
* Converts a List of Calendar objects to a List
* of dates
*
* @param dates
* @return the converted List
*/
public static List toDateList(final List dates) {
final List dateList = new ArrayList();
for (final Calendar calendar : dates) {
dateList.add(calendar.getTime());
}
return dateList;
}
}
/*
* ObjectLab, http://www.objectlab.co.uk/open is sponsoring the ObjectLab Kit.
*
* Based in London, we are world leaders in the design and development
* of bespoke applications for the securities financing markets.
*
* Click here to learn more about us
* ___ _ _ _ _ _
* / _ \| |__ (_) ___ ___| |_| | __ _| |__
* | | | | '_ \| |/ _ \/ __| __| | / _` | '_ \
* | |_| | |_) | | __/ (__| |_| |__| (_| | |_) |
* \___/|_.__// |\___|\___|\__|_____\__,_|_.__/
* |__/
*
* www.ObjectLab.co.uk
*/
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