Halbjahr.java

/*
 * This file is part of jHaushalt.
 * jHaushalt is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * jHaushalt 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 General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with jHaushalt; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 * (C)opyright 2002-2010 Dr. Lars H. Hahn
 */

package haushalt.daten.zeitraum;

import haushalt.daten.Datum;

import java.util.StringTokenizer;

/**
 * @author Dr. Lars H. Hahn
 * @version 2.6/2010.08.16
 * @since 2.0
 */

/*
 * 2010.08.16 BugFix: Berechnung des Zeitraums für ein halbes Jahr korrigiert
 * (1.6. -> 1.7.)
 * (entdeckt von Daniel Seither)
 * 2004.08.22 Erste Version
 */

public class Halbjahr
		extends AbstractZeitraum {

	private int haelfte = 1;
	private int jahr = 2000;

	public Halbjahr(final int haelfte, final int jahr) {
		this.haelfte = haelfte;
		this.jahr = jahr;
	}

	public Halbjahr(final String text) {
		try {
			final StringTokenizer st = new StringTokenizer(text, "/");
			this.haelfte = Integer.parseInt(st.nextToken());
			this.jahr = Integer.parseInt(st.nextToken());
			if (this.haelfte > 2) {
				this.haelfte = 2;
			}
		}
		catch (final Exception e) {
			// Fehler! -> Standardwerte.
		}
	}

	@Override
	public Datum getStartDatum() {
		if (this.haelfte == 1) {
			return new Datum(1, 1, this.jahr);
		}
		return new Datum(1, 7, this.jahr);
	}

	@Override
	public Datum getEndDatum() {
		if (this.haelfte == 1) {
			return new Datum(1, 7, this.jahr);
		}
		return new Datum(1, 1, this.jahr + 1);
	}

	@Override
	public AbstractZeitraum folgeZeitraum() {
		if (this.haelfte == 1) {
			return new Halbjahr(2, this.jahr);
		}
		return new Halbjahr(1, this.jahr + 1);
	}

	@Override
	public String toString() {
		return "" + this.haelfte + "/" + this.jahr;
	}

}