    001    /* ========================================================================
    002     * JCommon : a free general purpose class library for the Java(tm) platform
    003     * ========================================================================
    004     *
    005     * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
    006     *
    007     * Project Info:  http://www.jfree.org/jcommon/index.html
    008     *
    009     * This library is free software; you can redistribute it and/or modify it
    010     * under the terms of the GNU Lesser General Public License as published by
    011     * the Free Software Foundation; either version 2.1 of the License, or
    012     * (at your option) any later version.
    013     *
    014     * This library is distributed in the hope that it will be useful, but
    015     * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
    016     * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
    017     * License for more details.
    018     *
    019     * You should have received a copy of the GNU Lesser General Public
    020     * License along with this library; if not, write to the Free Software
    021     * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
    022     * USA.
    023     *
    024     * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
    025     * in the United States and other countries.]
    026     *
    027     * --------------------
    028     * DayAndMonthRule.java
    029     * --------------------
    030     * (C) Copyright 2000-2003, by Object Refinery Limited.
    031     *
    032     * Original Author:  David Gilbert (for Object Refinery Limited);
    033     * Contributor(s):   -;
    034     *
    035     * $Id: DayAndMonthRule.java,v 1.6 2005/11/16 15:58:40 taqua Exp $
    036     *
    037     * Changes (from 26-Oct-2001)
    038     * --------------------------
    039     * 26-Oct-2001 : Changed package to com.jrefinery.date.* (DG);
    040     * 12-Nov-2001 : Added some argument checks (DG);
    041     * 03-Oct-2002 : Fixed errors reported by Checkstyle (DG);
    042     * 01-Jun-2005 : Removed the explicit clonable declaration, it is declared
    043     *               in the super class.
    044     */
    045
    046    package org.jfree.date;
    047
    048    /**
    049     * An annual date rule where the generated date always falls on the same day
    050     * and month each year.
    051     * <P>
    052     * An example is ANZAC Day in Australia and New Zealand: it is observed on
    053     * 25 April of every year.
    054     *
    055     * @author David Gilbert
    056     */
    057    public class DayAndMonthRule extends AnnualDateRule {
    058
    059        /** The day of the month. */
    060        private int dayOfMonth;
    061
    062        /** The month (uses 1 to 12 in the obvious way). */
    063        private int month;
    064
    065        /**
    066         * Default constructor: builds a DayAndMonthRule for 1 January.
    067         */
    068        public DayAndMonthRule() {
    069            this(1, MonthConstants.JANUARY);
    070        }
    071
    072        /**
    073         * Standard constructor: builds a DayAndMonthRule for the given
    074         * day-of-the-month and month.
    075         * <P>
    076         * For the month parameter, use SerialDate.JANUARY, etc. Note that there
    077         * are no checks to prevent you from entering an invalid combination (such
    078         * as 31 February).
    079         *
    080         * @param dayOfMonth  the day of the month (in the range 1 to 31).
    081         * @param month  the month (use SerialDate.JANUARY, SerialDate.FEBRUARY etc.);
    082         */
    083        public DayAndMonthRule(final int dayOfMonth, final int month) {
    084
    085            // check arguments delegated to setter methods...
    086            setMonth(month);
    087            setDayOfMonth(dayOfMonth);
    088
    089        }
    090
    091        /**
    092         * Returns the day of the month.
    093         *
    094         * @return the day of the month.
    095         */
    096        public int getDayOfMonth() {
    097            return this.dayOfMonth;
    098        }
    099
    100        /**
    101         * Sets the day-of-the-month for this rule.
    102         *
    103         * @param dayOfMonth  the day-of-the-month.
    104         */
    105        public void setDayOfMonth(final int dayOfMonth) {
    106
    107            // check arguments...
    108            if ((dayOfMonth < 1) || (dayOfMonth > SerialDate.LAST_DAY_OF_MONTH[this.month])) {
    109                throw new IllegalArgumentException(
    110                    "DayAndMonthRule(): dayOfMonth outside valid range.");
    111            }
    112
    113            // make the change...
    114            this.dayOfMonth = dayOfMonth;
    115
    116        }
    117
    118        /**
    119         * Returns an integer code representing the month.
    120         * <P>
    121         * The codes JANUARY, FEBRUARY, MARCH, APRIL, MAY, JUNE, JULY, AUGUST,
    122         * SEPTEMBER, OCTOBER, NOVEMBER and DECEMBER are defined in the SerialDate
    123         * class.
    124         *
    125         * @return an integer code representing the month.
    126         */
    127        public int getMonth() {
    128            return this.month;
    129        }
    130
    131        /**
    132         * Sets the month for this rule.
    133         *
    134         * @param month  the month for this rule.
    135         */
    136        public void setMonth(final int month) {
    137
    138            // check arguments...
    139            if (!SerialDate.isValidMonthCode(month)) {
    140                throw new IllegalArgumentException("DayAndMonthRule(): month code not valid.");
    141            }
    142
    143            // make the change...
    144            this.month = month;
    145
    146        }
    147
    148        /**
    149         * Returns the date, given the year.
    150         *
    151         * @param yyyy  the year.
    152         *
    153         * @return the date generated by this rule for the specified year (null permitted).
    154         */
    155        public SerialDate getDate(final int yyyy) {
    156            return SerialDate.createInstance(this.dayOfMonth, this.month, yyyy);
    157        }
    158    }