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1: /* ======================================================================== 2: * JCommon : a free general purpose class library for the Java(tm) platform 3: * ======================================================================== 4: * 5: * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors. 6: * 7: * Project Info: http://www.jfree.org/jcommon/index.html 8: * 9: * This library is free software; you can redistribute it and/or modify it 10: * under the terms of the GNU Lesser General Public License as published by 11: * the Free Software Foundation; either version 2.1 of the License, or 12: * (at your option) any later version. 13: * 14: * This library is distributed in the hope that it will be useful, but 15: * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 16: * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 17: * License for more details. 18: * 19: * You should have received a copy of the GNU Lesser General Public 20: * License along with this library; if not, write to the Free Software 21: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 22: * USA. 23: * 24: * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 25: * in the United States and other countries.] 26: * 27: * ------------------- 28: * AnnualDateRule.java 29: * ------------------- 30: * (C) Copyright 2000-2003, by Object Refinery Limited. 31: * 32: * Original Author: David Gilbert (for Object Refinery Limited); 33: * Contributor(s): -; 34: * 35: * $Id: AnnualDateRule.java,v 1.4 2005/11/16 15:58:40 taqua Exp $ 36: * 37: * Changes (from 26-Oct-2001) 38: * -------------------------- 39: * 26-Oct-2001 : Changed package to com.jrefinery.date.* (DG); 40: * 12-Nov-2001 : Javadoc comments updated (DG); 41: * 03-Oct-2002 : Fixed errors reported by Checkstyle (DG); 42: * 43: */ 44: 45: package org.jfree.date; 46: 47: /** 48: * The base class for all 'annual' date rules: that is, rules for generating 49: * one date for any given year. 50: * <P> 51: * One example is Easter Sunday (which can be calculated using published algorithms). 52: * 53: * @author David Gilbert 54: */ 55: public abstract class AnnualDateRule implements Cloneable { 56: 57: /** 58: * Default constructor. 59: */ 60: protected AnnualDateRule() { 61: } 62: 63: /** 64: * Returns the date for this rule, given the year. 65: * 66: * @param year the year (1900 <= year <= 9999). 67: * 68: * @return the date for this rule, given the year. 69: */ 70: public abstract SerialDate getDate(int year); 71: 72: /** 73: * Returns a clone of the rule. 74: * <P> 75: * You should refer to the documentation of the clone() method in each 76: * subclass for exact details. 77: * 78: * @return a clone of the rule. 79: * 80: * @throws CloneNotSupportedException if the rule is not clonable. 81: */ 82: public Object clone() throws CloneNotSupportedException { 83: return super.clone(); 84: } 85: 86: }