Java tutorial
/* * Copyright (c) 2013 Villu Ruusmann * * This file is part of JPMML-Evaluator * * JPMML-Evaluator is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * JPMML-Evaluator 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 Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with JPMML-Evaluator. If not, see <http://www.gnu.org/licenses/>. */ package org.jpmml.evaluator; import org.joda.time.*; public class DaysSinceDate implements Comparable<DaysSinceDate> { private LocalDate epoch = null; private Days days = null; public DaysSinceDate(int year, LocalDate date) { this(new LocalDate(year, 1, 1), date); } public DaysSinceDate(LocalDate epoch, LocalDate date) { setEpoch(epoch); setDays(Days.daysBetween(epoch, date)); } @Override public int compareTo(DaysSinceDate that) { if (!(this.getEpoch()).equals(that.getEpoch())) { throw new ClassCastException(); } return (this.getDays()).compareTo(that.getDays()); } @Override public int hashCode() { return 37 * getEpoch().hashCode() + getDays().hashCode(); } @Override public boolean equals(Object object) { if (object instanceof DaysSinceDate) { DaysSinceDate that = (DaysSinceDate) object; return (this.getEpoch()).equals(that.getEpoch()) && (this.getDays()).equals(that.getDays()); } return false; } public int intValue() { return getDays().getDays(); } public LocalDate getEpoch() { return this.epoch; } private void setEpoch(LocalDate epoch) { this.epoch = epoch; } public Days getDays() { return this.days; } private void setDays(Days days) { this.days = days; } }