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

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Here is the source code for de.jollyday.parser.impl.FixedWeekdayRelativeToFixedParser.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.FixedWeekdayRelativeToFixed;
import de.jollyday.config.Holidays;
import de.jollyday.config.When;
import de.jollyday.parser.AbstractHolidayParser;

/**
 * Parses fixed weekday relative to fixed date.
 * 
 * @author Sven Diedrichsen
 * @version $Id: $
 */
public class FixedWeekdayRelativeToFixedParser extends AbstractHolidayParser {

    /**
     * {@inheritDoc}
     * 
     * Parses the provided configuration and creates holidays for the provided
     * year.
     */
    @Override
    public void parse(int year, Set<Holiday> holidays, final Holidays config) {
        for (FixedWeekdayRelativeToFixed f : config.getFixedWeekdayRelativeToFixed()) {
            if (!isValid(f, year)) {
                continue;
            }
            LocalDate day = calendarUtil.create(year, f.getDay());
            day = moveDateToFirstOccurenceOfWeekday(f, day);
            int days = determineNumberOfDays(f);
            day = f.getWhen() == When.AFTER ? day.plusDays(days) : day.minusDays(days);
            HolidayType type = xmlUtil.getType(f.getLocalizedType());
            holidays.add(new Holiday(day, f.getDescriptionPropertiesKey(), type));
        }
    }

    private LocalDate moveDateToFirstOccurenceOfWeekday(FixedWeekdayRelativeToFixed f, LocalDate day) {
        do {
            // move fixed to first occurrence of weekday
            day = f.getWhen() == When.AFTER ? day.plusDays(1) : day.minusDays(1);
        } while (day.getDayOfWeek() != xmlUtil.getWeekday(f.getWeekday()));
        return day;
    }

    private int determineNumberOfDays(FixedWeekdayRelativeToFixed f) {
        int days = 0;
        switch (f.getWhich()) {
        case SECOND:
            days = 7;
            break;
        case THIRD:
            days = 14;
            break;
        case FOURTH:
            days = 21;
            break;
        }
        return days;
    }

}