DateExpression.java

/*
 * This file is part of the GeoLatte project.
 *
 *     GeoLatte is free software: you can redistribute it and/or modify
 *     it under the terms of the GNU Lesser General Public License as published by
 *     the Free Software Foundation, either version 3 of the License, or
 *     (at your option) any later version.
 *
 *     GeoLatte 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 Lesser General Public License for more details.
 *
 *     You should have received a copy of the GNU Lesser General Public License
 *     along with GeoLatte.  If not, see <http://www.gnu.org/licenses/>.
 *
 * Copyright (C) 2010 - 2010 and Ownership of code is shared by:
 * Qmino bvba - Romeinsestraat 18 - 3001 Heverlee  (http://www.qmino.com)
 * Geovise bvba - Generaal Eisenhowerlei 9 - 2140 Antwerpen (http://www.geovise.com)
 */

package org.geolatte.common.expressions;

import java.util.Date;

/**
 * <p>
 * Abstract base class for all Date expressions.
 * </p>
 * <p>
 * <i>Creation-Date</i>: 01-Jun-2010<br>
 * <i>Creation-Time</i>:  18:34:02<br>
 * </p>
 *
 * @author Bert Vanhooff
 * @author <a href="http://www.qmino.com">Qmino bvba</a>
 * @since SDK1.5
 */
public abstract class DateExpression implements ComparableExpression<Date> {

    public int compareTo(Object evaluateObject, Date value) throws ClassCastException, NullPointerException {

        Date thisDate = evaluate(evaluateObject);

        if (thisDate == null)
            throw new NullPointerException("This date evaluated to null");
        if (value == null)
            throw new IllegalArgumentException("The given date value is null");

        if (thisDate.equals(value))
            return 0;
        
        return thisDate.before(value) ? -1 : 1;
    }

    public void switchOn(BasicTypeSwitch switcher) {

        switcher.caseDate(this);
    }
}