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/*
* Copyright 2016 Anton Tananaev (anton@traccar.org)
*
* 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.traccar.helper;
import java.util.Calendar;
import java.util.Date;
import org.joda.time.DateTime;
import org.joda.time.format.DateTimeFormatter;
import org.joda.time.format.ISODateTimeFormat;
public final class DateUtil {
private static final DateTimeFormatter DATE_FORMAT = ISODateTimeFormat.dateTime();
private static final DateTimeFormatter DATE_FORMAT_NOMILLIS = ISODateTimeFormat.dateTimeNoMillis();
private DateUtil() {
}
public static Date correctDay(Date guess) {
return correctDate(new Date(), guess, Calendar.DAY_OF_MONTH);
}
public static Date correctYear(Date guess) {
return correctDate(new Date(), guess, Calendar.YEAR);
}
public static Date correctDate(Date now, Date guess, int field) {
if (guess.getTime() > now.getTime()) {
Date previous = dateAdd(guess, field, -1);
if (now.getTime() - previous.getTime() < guess.getTime() - now.getTime()) {
return previous;
}
} else if (guess.getTime() < now.getTime()) {
Date next = dateAdd(guess, field, 1);
if (next.getTime() - now.getTime() < now.getTime() - guess.getTime()) {
return next;
}
}
return guess;
}
private static Date dateAdd(Date guess, int field, int amount) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(guess);
calendar.add(field, amount);
return calendar.getTime();
}
public static Date parseDate(String value) {
return DATE_FORMAT.parseDateTime(value).toDate();
}
public static DateTime parseDateTime(String value) {
return DATE_FORMAT_NOMILLIS.withOffsetParsed().parseDateTime(value);
}
}
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