itextpdf.jar is a component in iText 5 Java library to provide core functionalities. iText Java library allows you to generate and manage PDF documents.

The Source Code files are provided at iText GitHub site.

You can compile it to generate your JAR file, using pom.xml as the build configuration file.

The source code of itextpdf-5.5.14.jar is provided below:

⏎ com/itextpdf/xmp/XMPDateTime.java

//Copyright (c) 2006, Adobe Systems Incorporated
//All rights reserved.
//
//        Redistribution and use in source and binary forms, with or without
//        modification, are permitted provided that the following conditions are met:
//        1. Redistributions of source code must retain the above copyright
//        notice, this list of conditions and the following disclaimer.
//        2. Redistributions in binary form must reproduce the above copyright
//        notice, this list of conditions and the following disclaimer in the
//        documentation and/or other materials provided with the distribution.
//        3. All advertising materials mentioning features or use of this software
//        must display the following acknowledgement:
//        This product includes software developed by the Adobe Systems Incorporated.
//        4. Neither the name of the Adobe Systems Incorporated nor the
//        names of its contributors may be used to endorse or promote products
//        derived from this software without specific prior written permission.
//
//        THIS SOFTWARE IS PROVIDED BY ADOBE SYSTEMS INCORPORATED ''AS IS'' AND ANY
//        EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
//        WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
//        DISCLAIMED. IN NO EVENT SHALL ADOBE SYSTEMS INCORPORATED BE LIABLE FOR ANY
//        DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
//        (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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//        ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
//        (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
//        SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
//        http://www.adobe.com/devnet/xmp/library/eula-xmp-library-java.html

package com.itextpdf.xmp;

import java.util.Calendar;
import java.util.TimeZone;


/**
 * The <code>XMPDateTime</code>-class represents a point in time up to a resolution of nano
 * seconds. Dates and time in the serialized XMP are ISO 8601 strings. There are utility functions
 * to convert to the ISO format, a <code>Calendar</code> or get the Timezone. The fields of
 * <code>XMPDateTime</code> are:
 * <ul>
 * <li> month - The month in the range 1..12.
 * <li> day - The day of the month in the range 1..31.
 * <li> minute - The minute in the range 0..59.
 * <li> hour - The time zone hour in the range 0..23.
 * <li> minute - The time zone minute in the range 0..59.
 * <li> nanoSecond - The nano seconds within a second. <em>Note:</em> if the XMPDateTime is
 * converted into a calendar, the resolution is reduced to milli seconds.
 * <li> timeZone - a <code>TimeZone</code>-object.
 * </ul>
 * DateTime values are occasionally used in cases with only a date or only a time component. A date
 * without a time has zeros for all the time fields. A time without a date has zeros for all date
 * fields (year, month, and day).
 */
public interface XMPDateTime extends Comparable
{
	/** @return Returns the year, can be negative. */
	int getYear();
	
	/** @param year Sets the year */
	void setYear(int year);

	/** @return Returns The month in the range 1..12. */
	int getMonth();

	/** @param month Sets the month 1..12 */
	void setMonth(int month);
	
	/** @return Returns the day of the month in the range 1..31. */
	int getDay();
	
	/** @param day Sets the day 1..31 */
	void setDay(int day);

	/** @return Returns hour - The hour in the range 0..23. */
	int getHour();

	/** @param hour Sets the hour in the range 0..23. */
	void setHour(int hour);
	
	/** @return Returns the minute in the range 0..59. */ 
	int getMinute();

	/** @param minute Sets the minute in the range 0..59. */
	void setMinute(int minute);
	
	/** @return Returns the second in the range 0..59. */
	int getSecond();

	/** @param second Sets the second in the range 0..59. */
	void setSecond(int second);
	
	/**
	 * @return Returns milli-, micro- and nano seconds.
	 * 		   Nanoseconds within a second, often left as zero?
	 */
	int getNanoSecond();

	/**
	 * @param nanoSecond Sets the milli-, micro- and nano seconds.
	 *		Granularity goes down to milli seconds. 		   
	 */
	void setNanoSecond(int nanoSecond);
	
	/** @return Returns the time zone. */
	TimeZone getTimeZone();

	/** @param tz a time zone to set */
	void setTimeZone(TimeZone tz);
	
	/**
	 * This flag is set either by parsing or by setting year, month or day. 
	 * @return Returns true if the XMPDateTime object has a date portion.
	 */
	boolean hasDate();
	
	/**
	 * This flag is set either by parsing or by setting hours, minutes, seconds or milliseconds. 
	 * @return Returns true if the XMPDateTime object has a time portion.
	 */
	boolean hasTime();
	
	/**
	 * This flag is set either by parsing or by setting hours, minutes, seconds or milliseconds. 
	 * @return Returns true if the XMPDateTime object has a defined timezone.
	 */
	boolean hasTimeZone();
	
	/** 
	 * @return Returns a <code>Calendar</code> (only with milli second precision). <br>
	 *  		<em>Note:</em> the dates before Oct 15th 1585 (which normally fall into validity of 
	 *  		the Julian calendar) are also rendered internally as Gregorian dates. 
	 */
	Calendar getCalendar();
	
	/**
	 * @return Returns the ISO 8601 string representation of the date and time.
	 */
	String getISO8601String();
}

⏎ com/itextpdf/xmp/XMPDateTime.java

Or download all of them as a single archive file:

File name: itextpdf-5.5.14-fyi.zip
File size: 2163839 bytes
Release date: 2009-10-09
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