org.jiemamy.utils.DateUtil.java Source code

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Here is the source code for org.jiemamy.utils.DateUtil.java

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/*
 * Copyright 2007-2012 Jiemamy Project and the Others.
 * Created on 2009/02/19
 *
 * This file is part of Jiemamy.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.jiemamy.utils;

import java.util.Calendar;

import org.apache.commons.lang.Validate;

/**
 * 
 * 
 * <p>cf. http://d.hatena.ne.jp/higayasuo/20090219/1235020303</p>
 * 
 * @version $Id$
 * @author daisuke
 */
public final class DateUtil {

    /** Unix ?? */
    static final int UNIX_EPOCH = 1970;

    /**
     * {@link java.util.Date}{@link java.sql.Date}???
     * 
     * @param date {@link java.util.Date}
     * @return{@link java.sql.Date}
     * @throws IllegalArgumentException ?{@code null}???
     */
    public static java.sql.Date toSqlDate(java.util.Date date) {
        Validate.notNull(date);

        Calendar cal = Calendar.getInstance();
        cal.setTime(date);
        cal.set(Calendar.HOUR_OF_DAY, 0);
        cal.set(Calendar.MINUTE, 0);
        cal.set(Calendar.SECOND, 0);
        cal.set(Calendar.MILLISECOND, 0);
        return new java.sql.Date(cal.getTimeInMillis());
    }

    /**
     * {@link java.util.Date}{@link java.sql.Time}???
     * 
     * @param date {@link java.util.Date}
     * @return {@link java.sql.Time}
     * @throws IllegalArgumentException ?{@code null}???
     */
    public static java.sql.Time toSqlTime(java.util.Date date) {
        Validate.notNull(date);

        Calendar cal = Calendar.getInstance();
        cal.setTime(date);
        cal.set(Calendar.YEAR, UNIX_EPOCH);
        cal.set(Calendar.MONTH, Calendar.JANUARY);
        cal.set(Calendar.DATE, 1);
        return new java.sql.Time(cal.getTimeInMillis());
    }

    private DateUtil() {
    }
}