com.adobe.xmp.core.XMPDateTimeUtils Maven / Gradle / Ivy
// =================================================================================================
// ADOBE SYSTEMS INCORPORATED
// Copyright 2012 Adobe Systems Incorporated
// All Rights Reserved
//
// NOTICE: Adobe permits you to use, modify, and distribute this file in accordance with the terms
// of the Adobe license agreement accompanying it.
// =================================================================================================
package com.adobe.xmp.core;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.TimeZone;
public final class XMPDateTimeUtils
{
/** The UTC TimeZone */
private static final TimeZone UTC = TimeZone.getTimeZone("UTC");
/**
* Obtain the current date and time.
*
* @return Returns The returned time is UTC, properly adjusted for the local time zone. The
* resolution of the time is not guaranteed to be finer than seconds.
*/
public static XMPDateTime getCurrentDateTime()
{
return new XMPDateTime(new GregorianCalendar());
}
/**
* Set to the local time zone (local timezone is provided by the OS).
* if adjustTime is false no other existing time zone value is replaced,
* the other date/time fields are not adjusted in any way. If adjustTime is true,
* the time is adjusted based on the local time zone.
*
* @param dateTime the XMPDateTime variable containing the value to be modified.
* @param adjustTime flag if the time should be adjusted based on the time
* @return Returns an updated XMPDateTime-object.
*/
public static XMPDateTime convertToLocalTimeZone(XMPDateTime dateTime, boolean adjustTime )
{
if (adjustTime)
{
long timeInMillis = dateTime.getCalendar().getTimeInMillis();
// has automatically local timezone
GregorianCalendar cal = new GregorianCalendar();
cal.setTimeInMillis(timeInMillis);
return new XMPDateTime(cal);
}
else
{
Calendar cal = dateTime.getCalendar();
cal.setTimeZone(TimeZone.getDefault());
return new XMPDateTime(cal);
}
}
/**
* Make sure a time is UTC. If the time zone is not UTC, the time is
* adjusted and the time zone set to be UTC.
*
* @param dateTime
* the XMPDateTime variable containing the time to
* be modified.
* @return Returns an updated XMPDateTime-object.
*/
public static XMPDateTime convertToUTCTime(XMPDateTime dateTime)
{
long timeInMillis = dateTime.getCalendar().getTimeInMillis();
GregorianCalendar cal = new GregorianCalendar(UTC);
cal.setGregorianChange(new Date(Long.MIN_VALUE));
cal.setTimeInMillis(timeInMillis);
return new XMPDateTime(cal);
}
}