com.liferay.portal.kernel.cal.RecurrenceSerializer Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of com.liferay.portal.kernel Show documentation
Contains interfaces for the portal services. Interfaces are only loaded by the global class loader and are shared by all plugins.
There is a newer version: 141.0.0
Show newest version
/**
 * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version.
 *
 * This library 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 Lesser General Public License for more
 * details.
 */

package com.liferay.portal.kernel.cal;

import com.liferay.petra.string.StringBundler;
import com.liferay.petra.string.StringPool;
import com.liferay.portal.kernel.util.CalendarFactoryUtil;
import com.liferay.portal.kernel.util.FastDateFormatFactoryUtil;
import com.liferay.portal.kernel.util.LocaleUtil;
import com.liferay.portal.kernel.util.StringUtil;

import java.text.Format;

import java.util.Calendar;

/**
 * @author Brian Wing Shun Chan
 */
public class RecurrenceSerializer {

	public static String toCronText(Recurrence recurrence) {
		Calendar dtStart = recurrence.getDtStart();

		int frequency = recurrence.getFrequency();
		int interval = recurrence.getInterval();

		DayAndPosition[] byDay = recurrence.getByDay();
		int[] byMonthDay = recurrence.getByMonthDay();

		String startDateSecond = String.valueOf(dtStart.get(Calendar.SECOND));
		String startDateMinute = String.valueOf(dtStart.get(Calendar.MINUTE));

		int startDateHour = dtStart.get(Calendar.HOUR);

		if (dtStart.get(Calendar.AM_PM) == Calendar.PM) {
			startDateHour += 12;
		}

		String dayOfMonth = String.valueOf(dtStart.get(Calendar.DAY_OF_MONTH));
		String month = String.valueOf(dtStart.get(Calendar.MONTH) + 1);
		String dayOfWeek = String.valueOf(dtStart.get(Calendar.DAY_OF_WEEK));
		String year = String.valueOf(dtStart.get(Calendar.YEAR));

		if (frequency == Recurrence.NO_RECURRENCE) {
			dayOfWeek = StringPool.QUESTION;
		}
		else if (frequency == Recurrence.DAILY) {
			dayOfMonth = 1 + _getIntervalValue(interval, Recurrence.DAILY);
			month = StringPool.STAR;
			dayOfWeek = StringPool.QUESTION;
			year = StringPool.STAR;

			if (byDay != null) {
				dayOfMonth = StringPool.QUESTION;

				dayOfWeek = StringPool.BLANK;

				for (int i = 0; i < byDay.length; i++) {
					if (i > 0) {
						dayOfWeek += StringPool.COMMA;
					}

					dayOfWeek += getDayOfWeek(byDay[i]);
				}
			}
		}
		else if (frequency == Recurrence.WEEKLY) {
			dayOfMonth = StringPool.QUESTION;
			month = StringPool.STAR;
			year = StringPool.STAR;

			if (byDay != null) {
				dayOfWeek = StringPool.BLANK;

				for (int i = 0; i < byDay.length; i++) {
					if (i > 0) {
						dayOfWeek += StringPool.COMMA;
					}

					dayOfWeek += getDayOfWeek(byDay[i]);
				}
			}

			dayOfWeek += _getIntervalValue(interval, Recurrence.WEEKLY);
		}
		else if (frequency == Recurrence.MONTHLY) {
			dayOfMonth = StringPool.QUESTION;
			month = 1 + _getIntervalValue(interval, Recurrence.MONTHLY);
			dayOfWeek = StringPool.QUESTION;
			year = StringPool.STAR;

			if ((byMonthDay != null) && (byMonthDay.length == 1)) {
				dayOfMonth = String.valueOf(byMonthDay[0]);
			}
			else if ((byDay != null) && (byDay.length == 1)) {
				String pos = String.valueOf(byDay[0].getDayPosition());

				if (pos.equals("-1")) {
					dayOfWeek = getDayOfWeek(byDay[0]) + "L";
				}
				else {
					dayOfWeek = getDayOfWeek(byDay[0]) + StringPool.POUND + pos;
				}
			}
		}
		else if (frequency == Recurrence.YEARLY) {
			int[] byMonth = recurrence.getByMonth();

			dayOfMonth = StringPool.QUESTION;
			dayOfWeek = StringPool.QUESTION;
			year += _getIntervalValue(interval, Recurrence.YEARLY);

			if ((byMonth != null) && (byMonth.length == 1)) {
				month = String.valueOf(byMonth[0] + 1);

				if ((byMonthDay != null) && (byMonthDay.length == 1)) {
					dayOfMonth = String.valueOf(byMonthDay[0]);
				}
				else if ((byDay != null) && (byDay.length == 1)) {
					String pos = String.valueOf(byDay[0].getDayPosition());

					if (pos.equals("-1")) {
						dayOfWeek = getDayOfWeek(byDay[0]) + "L";
					}
					else {
						dayOfWeek =
							getDayOfWeek(byDay[0]) + StringPool.POUND + pos;
					}
				}
			}
		}

		StringBundler sb = new StringBundler(13);

		sb.append(startDateSecond);
		sb.append(StringPool.SPACE);
		sb.append(startDateMinute);
		sb.append(StringPool.SPACE);
		sb.append(startDateHour);
		sb.append(StringPool.SPACE);
		sb.append(dayOfMonth);
		sb.append(StringPool.SPACE);
		sb.append(month);
		sb.append(StringPool.SPACE);
		sb.append(dayOfWeek);
		sb.append(StringPool.SPACE);
		sb.append(year);

		return sb.toString();
	}

	protected static String getDayOfWeek(DayAndPosition dayPos) {
		Calendar calendar = CalendarFactoryUtil.getCalendar();

		calendar.set(Calendar.DAY_OF_WEEK, dayPos.getDayOfWeek());

		Format format = FastDateFormatFactoryUtil.getSimpleDateFormat(
			"EEE", LocaleUtil.US);

		return StringUtil.toUpperCase(format.format(calendar));
	}

	private static String _getIntervalValue(int interval, int period) {
		if ((interval <= 0) && (period == Recurrence.WEEKLY)) {
			return StringPool.BLANK;
		}
		else if (interval <= 0) {
			return StringPool.FORWARD_SLASH + 1;
		}

		return StringPool.FORWARD_SLASH + interval;
	}

}