Java tutorial
///////////////////////////////////////////////////////////////////////////// // // Project ProjectForge Community Edition // www.projectforge.org // // Copyright (C) 2001-2013 Kai Reinhard (k.reinhard@micromata.de) // // ProjectForge is dual-licensed. // // This community edition is free software; you can redistribute it and/or // modify it under the terms of the GNU General Public License as published // by the Free Software Foundation; version 3 of the License. // // This community edition is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General // Public License for more details. // // You should have received a copy of the GNU General Public License along // with this program; if not, see http://www.gnu.org/licenses/. // ///////////////////////////////////////////////////////////////////////////// package org.projectforge.calendar; import java.math.BigDecimal; import java.util.Calendar; import java.util.Date; import java.util.HashMap; import java.util.Locale; import java.util.Map; import java.util.TimeZone; import org.apache.commons.lang.Validate; import org.projectforge.common.DateHelper; import org.projectforge.common.DateHolder; import org.projectforge.common.DatePrecision; import org.projectforge.core.UserException; /** * @author Kai Reinhard (k.reinhard@micromata.de) * */ public class DayHolder extends DateHolder { private static final long serialVersionUID = 2646871164508930568L; /** I18n keys of the day names (e. g. needed for I18n). */ public static final String DAY_KEYS[] = new String[] { "sunday", "monday", "tuesday", "wednesday", "thursday", "friday", "saturday" }; private transient Holidays holidays = Holidays.getInstance(); private Map<String, Object> objects; /** Only set, if day is holiday. */ private String holidayInfo = null; private boolean marker = false; public static String getDayKey(final int dayOfWeek) { return DAY_KEYS[dayOfWeek - 1]; } public static BigDecimal getNumberOfWorkingDays(final Date from, final Date to) { Validate.notNull(from); Validate.notNull(to); final DayHolder fromDay = new DayHolder(from); final DayHolder toDay = new DayHolder(to); return getNumberOfWorkingDays(fromDay, toDay); } public static BigDecimal getNumberOfWorkingDays(final DateHolder from, final DateHolder to) { Validate.notNull(from); Validate.notNull(to); if (to.before(from) == true) { return BigDecimal.ZERO; } DayHolder day = new DayHolder(from); BigDecimal numberOfWorkingDays = BigDecimal.ZERO; int numberOfFullWorkingDays = 0; int dayCounter = 1; if (day.isWorkingDay() == true) { final BigDecimal workFraction = day.getWorkFraction(); if (workFraction != null) { numberOfWorkingDays = numberOfWorkingDays.add(day.getWorkFraction()); } else { numberOfFullWorkingDays++; } } do { day.add(Calendar.DAY_OF_MONTH, 1); if (dayCounter++ > 740) { // Endless loop protection, time period greater 2 years. throw new UserException( "getNumberOfWorkingDays does not support calculation of working days for a time period greater than two years!"); } if (day.isWorkingDay() == true) { final BigDecimal workFraction = day.getWorkFraction(); if (workFraction != null) { numberOfWorkingDays = numberOfWorkingDays.add(day.getWorkFraction()); } else { numberOfFullWorkingDays++; } } } while (day.isSameDay(to) == false); numberOfWorkingDays = numberOfWorkingDays.add(new BigDecimal(numberOfFullWorkingDays)); return numberOfWorkingDays; } /** * Initializes with current day (with time zone UTC!). */ public DayHolder() { super(DatePrecision.DAY); } /** * @param date */ public DayHolder(final Date date) { super(date, DatePrecision.DAY); } public DayHolder(final Date date, final TimeZone timeZone, final Locale locale) { super(date, DatePrecision.DAY, timeZone, locale); } public DayHolder(final DateHolder dateHolder) { this.calendar = (Calendar) dateHolder.getCalendar().clone(); setPrecision(DatePrecision.DAY); } /** * Multipurpose marker, e. g. used by select date for marking days as days not from the current month. * @return */ public boolean isMarker() { return marker; } public DayHolder setMarker(final boolean marker) { this.marker = marker; return this; } public String getDayKey() { return getDayKey(getDayOfWeek()); } public boolean isToday() { return isSameDay(new Date()); } public boolean isSunday() { return Calendar.SUNDAY == getDayOfWeek(); } public boolean isWeekend() { int dayOfWeek = getDayOfWeek(); return Calendar.SUNDAY == dayOfWeek || Calendar.SATURDAY == dayOfWeek; } public boolean isHoliday() { return holidays.isHoliday(getYear(), getDayOfYear()); } public boolean isSunOrHoliday() { if (isSunday() == true || isHoliday() == true) return true; else return false; } public boolean isWorkingDay() { return holidays.isWorkingDay(this); } /** * Weekend days have always no work fraction! */ public BigDecimal getWorkFraction() { return holidays.getWorkFraction(this); } public String getHolidayInfo() { if (holidayInfo == null) { holidayInfo = holidays.getHolidayInfo(getYear(), getDayOfYear()); } return holidayInfo; } public DayHolder setHolidays(final Holidays holidays) { this.holidays = holidays; return this; } /** Does not set end of day as DateHolder. */ @Override public DayHolder setEndOfWeek() { calendar.set(Calendar.DAY_OF_WEEK, calendar.getFirstDayOfWeek() + 6); return this; } /** Does not set end of day as DateHolder. */ @Override public DayHolder setEndOfMonth() { int day = calendar.getActualMaximum(Calendar.DAY_OF_MONTH); calendar.set(Calendar.DAY_OF_MONTH, day); return this; } /** * @return The time in millis for the day represented by this object but with current time of day (now). * @see DateHelper#getCalendar() */ public long getMillisForCurrentTimeOfDay() { Calendar cal = (Calendar) calendar.clone(); cal.set(Calendar.YEAR, this.getYear()); cal.set(Calendar.MONTH, this.getMonth()); cal.set(Calendar.DAY_OF_MONTH, this.getDayOfMonth()); return cal.getTimeInMillis(); } public String toString() { return isoFormat(); } public String isoFormat() { return DateHelper.formatIsoDate(getDate()); } /** * For storing additional objects to a day. This is used by the date selector for showing the user's timesheets at this day. * @param obj */ public DayHolder addObject(final String key, final Object value) { if (this.objects == null) { this.objects = new HashMap<String, Object>(); } this.objects.put(key, value); return this; } /** * Used for getting e. g. the user time sheets at this day for showing the calendar in ical like format. * @return the stored objects to this day or null, if not exist. */ public Object getObject(final String key) { if (this.objects == null) { return null; } return this.objects.get(key); } public Map<String, Object> getObjects() { return this.objects; } }