org.apache.ranger.common.DateUtil.java Source code

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Here is the source code for org.apache.ranger.common.DateUtil.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.apache.ranger.common;

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.TimeZone;

import org.apache.commons.lang.StringUtils;
import org.springframework.stereotype.Component;

@Component
public class DateUtil {

    private static final TimeZone gmtTimeZone = TimeZone.getTimeZone("GMT+0");

    public Date getDateFromNow(int days) {
        return getDateFromNow(days, 0, 0);
    }

    public Date getDateFromNow(int days, int hours, int minutes) {
        Calendar cal = Calendar.getInstance();
        cal.add(Calendar.DATE, days);
        cal.add(Calendar.HOUR, hours);
        cal.add(Calendar.MINUTE, minutes);
        return cal.getTime();
    }

    public static String dateToString(Date date, String dateFromat) {
        SimpleDateFormat formatter = new SimpleDateFormat(dateFromat);
        return formatter.format(date).toString();
    }

    public Date getDateFromGivenDate(Date date, int days, int hours, int minutes, int second) {
        Calendar cal = Calendar.getInstance();
        cal.setTime(date);
        cal.add(Calendar.DATE, days);
        cal.add(Calendar.HOUR, hours);
        cal.add(Calendar.MINUTE, minutes);
        cal.add(Calendar.SECOND, second);
        return cal.getTime();
    }

    /**
     * useful for converting client time zone Date to UTC Date
     * @param date
     * @param mins
     * @return
     */
    public Date addTimeOffset(Date date, int mins) {
        if (date == null) {
            return date;
        }
        long t = date.getTime();
        Date newDate = new Date(t + (mins * 60000));
        return newDate;
    }

    public static Date getUTCDate() {
        try {
            Calendar local = Calendar.getInstance();
            int offset = local.getTimeZone().getOffset(local.getTimeInMillis());
            GregorianCalendar utc = new GregorianCalendar(gmtTimeZone);
            utc.setTimeInMillis(local.getTimeInMillis());
            utc.add(Calendar.MILLISECOND, -offset);
            return utc.getTime();
        } catch (Exception ex) {
            return null;
        }
    }

    public static Date getUTCDate(long epoh) {
        if (epoh == 0) {
            return null;
        }
        try {
            Calendar local = Calendar.getInstance();
            int offset = local.getTimeZone().getOffset(epoh);
            GregorianCalendar utc = new GregorianCalendar(gmtTimeZone);
            utc.setTimeInMillis(epoh);
            utc.add(Calendar.MILLISECOND, -offset);
            return utc.getTime();
        } catch (Exception ex) {
            return null;
        }
    }

    public static Date getLocalDateForUTCDate(Date date) {
        Calendar local = Calendar.getInstance();
        int offset = local.getTimeZone().getOffset(local.getTimeInMillis());
        GregorianCalendar utc = new GregorianCalendar();
        utc.setTimeInMillis(date.getTime());
        utc.add(Calendar.MILLISECOND, offset);
        return utc.getTime();
    }

    public static Date stringToDate(String dateString, String dateFromat) {
        SimpleDateFormat simpleDateFormat = null;
        Date date = null;
        if (!StringUtils.isEmpty(dateString) && !StringUtils.isEmpty(dateFromat)) {
            try {
                simpleDateFormat = new SimpleDateFormat(dateFromat);
                date = simpleDateFormat.parse(dateString);
            } catch (Exception ex) {
                return null;
            }
        }
        return date;
    }
}