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//Copyright (c) 2006, Adobe Systems Incorporated
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//        This product includes software developed by the Adobe Systems Incorporated.
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package com.itextpdf.xmp;

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

import com.itextpdf.xmp.impl.XMPDateTimeImpl;


/**
 * A factory to create XMPDateTime-instances from a Calendar or an
 * ISO 8601 string or for the current time.
 * 
 * @since 16.02.2006
 */
public final class XMPDateTimeFactory
{
	/** The UTC TimeZone */
	private static final TimeZone UTC = TimeZone.getTimeZone("UTC");

	

	/** Private constructor */
	private XMPDateTimeFactory()
	{
		// EMPTY
	}


	/**
	 * Creates an XMPDateTime from a Calendar-object.
	 * 
	 * @param calendar a Calendar-object.
	 * @return An XMPDateTime-object.
	 */
	public static XMPDateTime createFromCalendar(Calendar calendar)
	{
		return new XMPDateTimeImpl(calendar);
	}

	
	/**
	 * Creates an empty XMPDateTime-object.
	 * @return Returns an XMPDateTime-object.
	 */
	public static XMPDateTime create()
	{
		return new XMPDateTimeImpl();
	}
	
	
	/**
	 * Creates an XMPDateTime-object from initial values.
	 * @param year years
	 * @param month months from 1 to 12
* Note: Remember that the month in {@link Calendar} is defined from 0 to 11. * @param day days * @return Returns an XMPDateTime-object. */ public static XMPDateTime create(int year, int month, int day) { XMPDateTime dt = new XMPDateTimeImpl(); dt.setYear(year); dt.setMonth(month); dt.setDay(day); return dt; } /** * Creates an XMPDateTime-object from initial values. * @param year years * @param month months from 1 to 12
* Note: Remember that the month in {@link Calendar} is defined from 0 to 11. * @param day days * @param hour hours * @param minute minutes * @param second seconds * @param nanoSecond nanoseconds * @return Returns an XMPDateTime-object. */ public static XMPDateTime create(int year, int month, int day, int hour, int minute, int second, int nanoSecond) { XMPDateTime dt = new XMPDateTimeImpl(); dt.setYear(year); dt.setMonth(month); dt.setDay(day); dt.setHour(hour); dt.setMinute(minute); dt.setSecond(second); dt.setNanoSecond(nanoSecond); return dt; } /** * Creates an XMPDateTime from an ISO 8601 string. * * @param strValue The ISO 8601 string representation of the date/time. * @return An XMPDateTime-object. * @throws XMPException When the ISO 8601 string is non-conform */ public static XMPDateTime createFromISO8601(String strValue) throws XMPException { return new XMPDateTimeImpl(strValue); } /** * 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 XMPDateTimeImpl(new GregorianCalendar()); } /** * Sets the local time zone without touching any other Any existing time zone value is replaced, * the other date/time fields are not adjusted in any way. * * @param dateTime the XMPDateTime variable containing the value to be modified. * @return Returns an updated XMPDateTime-object. */ public static XMPDateTime setLocalTimeZone(XMPDateTime dateTime) { Calendar cal = dateTime.getCalendar(); cal.setTimeZone(TimeZone.getDefault()); return new XMPDateTimeImpl(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 XMPDateTimeImpl(cal); } /** * Make sure a time is local. If the time zone is not the local zone, the time is adjusted and * the time zone set to be local. * * @param dateTime the XMPDateTime variable containing the time to be modified. * @return Returns an updated XMPDateTime-object. */ public static XMPDateTime convertToLocalTime(XMPDateTime dateTime) { long timeInMillis = dateTime.getCalendar().getTimeInMillis(); // has automatically local timezone GregorianCalendar cal = new GregorianCalendar(); cal.setTimeInMillis(timeInMillis); return new XMPDateTimeImpl(cal); } }




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