de.jollyday.parser.impl.FixedWeekdayInMonthParser.java Source code

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Here is the source code for de.jollyday.parser.impl.FixedWeekdayInMonthParser.java

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/**
 * Copyright 2010 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.util.Set;

import org.joda.time.LocalDate;

import de.jollyday.Holiday;
import de.jollyday.HolidayType;
import de.jollyday.config.FixedWeekdayInMonth;
import de.jollyday.config.Holidays;
import de.jollyday.config.Which;
import de.jollyday.parser.AbstractHolidayParser;

/**
 * The Class FixedWeekdayInMonthParser.
 * 
 * @author tboven
 * @version $Id: $
 */
public class FixedWeekdayInMonthParser extends AbstractHolidayParser {

    /*
     * (non-Javadoc)
     * 
     * @see de.jollyday.parser.HolidayParser#parse(int, java.util.Set,
     * de.jollyday.config.Holidays)
     */
    /** {@inheritDoc} */
    @Override
    public void parse(int year, Set<Holiday> holidays, final Holidays config) {
        for (FixedWeekdayInMonth fwm : config.getFixedWeekday()) {
            if (!isValid(fwm, year)) {
                continue;
            }
            LocalDate date = parse(year, fwm);
            HolidayType type = xmlUtil.getType(fwm.getLocalizedType());
            holidays.add(new Holiday(date, fwm.getDescriptionPropertiesKey(), type));
        }
    }

    /**
     * Parses the {@link FixedWeekdayInMonth}.
     * 
     * @param year
     *            the year
     * @param fwm
     *            the fwm
     * @return the local date
     */
    protected LocalDate parse(int year, FixedWeekdayInMonth fwm) {
        LocalDate date = calendarUtil.create(year, xmlUtil.getMonth(fwm.getMonth()), 1);
        int direction = 1;
        if (fwm.getWhich() == Which.LAST) {
            date = date.withDayOfMonth(date.dayOfMonth().getMaximumValue());
            direction = -1;
        }
        date = moveToNextRequestedWeekdayByDirection(fwm, date, direction);
        date = moveNumberOfRequestedWeeks(fwm, date);
        return date;
    }

    private LocalDate moveNumberOfRequestedWeeks(FixedWeekdayInMonth fwm, LocalDate date) {
        switch (fwm.getWhich()) {
        case SECOND:
            date = date.plusDays(7);
            break;
        case THIRD:
            date = date.plusDays(14);
            break;
        case FOURTH:
            date = date.plusDays(21);
        }
        return date;
    }

    private LocalDate moveToNextRequestedWeekdayByDirection(FixedWeekdayInMonth fwm, LocalDate date,
            int direction) {
        int weekDay = xmlUtil.getWeekday(fwm.getWeekday());
        while (date.getDayOfWeek() != weekDay) {
            date = date.plusDays(direction);
        }
        return date;
    }

}