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This API determines the holidays for a given year, country/name and eventually state/region. The holiday data is stored in XML files (one for each country) and will be read from the classpath. You can provide your own holiday calendar XML file or use any of the provided ones. Currently there are 63 countries supported like the following: United States, most european countries, Russia, India, Australia. Besides those there will be more special calendars like currently existing NYSE calendar (New York Stock Exchange).

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/**
 * Copyright 2011 Sven Diedrichsen 
 * 
 * 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 de.jollyday.parser.impl;

import java.time.LocalDate;
import java.util.Set;

import de.jollyday.Holiday;
import de.jollyday.config.HolidayType;
import de.jollyday.config.Holidays;
import de.jollyday.config.RelativeToEasterSunday;
import de.jollyday.parser.AbstractHolidayParser;

/**
 * This parser creates holidays relative to easter sunday.
 * 
 * @author Sven Diedrichsen
 * @version $Id: $
 */
public class RelativeToEasterSundayParser extends AbstractHolidayParser {

	/**
	 * Properties prefix for christian holidays names.
	 */
	private static final String PREFIX_PROPERTY_CHRISTIAN = "christian.";

	/**
	 * {@inheritDoc}
	 * 
	 * Parses relative to easter sunday holidays.
	 */
	@Override
	public void parse(int year, Set holidays, Holidays config) {
		for (RelativeToEasterSunday ch : config.getRelativeToEasterSunday()) {
			if (!isValid(ch, year)) {
				continue;
			}
			LocalDate easterSunday = getEasterSunday(year, ch.getChronology()).plusDays(ch.getDays());
			String propertiesKey = PREFIX_PROPERTY_CHRISTIAN + ch.getDescriptionPropertiesKey();
			addChristianHoliday(easterSunday, propertiesKey, ch.getLocalizedType(), holidays);
		}
	}

	/**
	 * Adds the given day to the list of holidays.
	 * 
	 * @param day
	 *            a {@link LocalDate} object.
	 * @param propertiesKey
	 *            a {@link java.lang.String} object.
	 * @param holidayType
	 *            a {@link de.jollyday.config.HolidayType} object.
	 * @param holidays
	 *            a {@link java.util.Set} object.
	 */
	protected void addChristianHoliday(LocalDate day, String propertiesKey, HolidayType holidayType,
			Set holidays) {
		de.jollyday.HolidayType type = xmlUtil.getType(holidayType);
		Holiday h = new Holiday(day, propertiesKey, type);
		holidays.add(h);
	}

}