Java 8 – How to convert OffsetDateTime to XMLGregorianCalendar and vice-versa ?

August 18, 2022 SJ Java 8, Java 8 Date/Time 0

In this article, we will learn how to convert OffsetDateTime to XMLGregorianCalendar in Java 1.8 version and vice-versa

1. Convert OffsetDateTime to XMLGregorianCalendar :

  • For conversion of OffsetDateTime to XMLGregorianCalendar use DatatypeFactory
  • DatatypeFactory.newInstance().newXMLGregorianCalendar(GregorianCalendar) returns XMLGregorianCalendar object
    • First, convert OffsetDateTime to ZonedDateTime using toZonedDateTime() method
    • Pass converted ZonedDateTime to GregorianCalendar.from() method which returns GregorianCalendar
    • Pass converted GregorianCalendar to DatatypeFactory.newInstance().newXMLGregorianCalendar() method which returns XMLGregorianCalendar
  • In short, OffsetDateTime -> ZonedDateTime -> GregorianCalendar -> XMLGregorianCalendar
  • Lets see an example for conversion of OffsetDateTime to XMLGregorianCalendar in the below illustration

ConvertOffsetDateTimeToXmlGregorianCalendar.java

package in.bench.resources.java8.offsetdatetime.examples;

import java.time.OffsetDateTime;
import java.util.GregorianCalendar;

import javax.xml.datatype.DatatypeConfigurationException;
import javax.xml.datatype.DatatypeFactory;
import javax.xml.datatype.XMLGregorianCalendar;

public class ConvertOffsetDateTimeToXmlGregorianCalendar {

	public static void main(String[] args) throws DatatypeConfigurationException {

		// 1. get Offset date/time
		OffsetDateTime offsetDateTime = OffsetDateTime.now();
		System.out.println("Offset Date/time is :- \n" + offsetDateTime);


		// 2. convert OffsetDateTime -> GregorianCalendar 
		GregorianCalendar gregorianCalendar = GregorianCalendar
				.from(offsetDateTime.toZonedDateTime());
		System.out.println("\nGregorianCalendar is :- \n" 
				+ gregorianCalendar.getTime());


		// 3. convert GregorianCalendar to XMLGregorianCalendar
		XMLGregorianCalendar xmlGregorianCalendar = DatatypeFactory
				.newInstance()
				.newXMLGregorianCalendar(
						gregorianCalendar
						);


		// 4. print to console
		System.out.print("\nConversion of OffsetDateTime to XMLGregorianCalendar is :- \n"
				+ xmlGregorianCalendar);
	}
}

Output:

Offset Date/time is :- 
2022-08-17T13:49:32.616212600+05:30

GregorianCalendar is :- 
Wed Aug 17 13:49:32 IST 2022

Conversion of OffsetDateTime to XMLGregorianCalendar is :- 
2022-08-17T13:49:32.616+05:30

2. Convert XMLGregorianCalendar to OffsetDateTime :

  • First, create XMLGregorianCalendar object using DatatypeFactory.newInstance().newXMLGregorianCalendar(String) method
  • For conversion of XMLGregorianCalendar to OffsetDateTime,
    • First, convert XMLGregorianCalendar to GregorianCalendar using toGregorianCalendar() method
    • And then invoke toZonedDateTime() method for conversion of GregorianCalendar to ZonedDateTime
    • And again invoke toOffsetDateTime() method for conversion of ZonedDateTime to OffsetDateTime
  • In short, XMLGregorianCalendar -> GregorianCalendar -> ZonedDateTime -> OffsetDateTime
  • Lets see an example for conversion of XMLGregorianCalendar to an OffsetDateTime in the below illustration

ConvertXmlGregorianCalendarToOffsetDateTime.java

package in.bench.resources.java8.offsetdatetime.examples;

import java.time.OffsetDateTime;

import javax.xml.datatype.DatatypeConfigurationException;
import javax.xml.datatype.DatatypeFactory;
import javax.xml.datatype.XMLGregorianCalendar;

public class ConvertXmlGregorianCalendarToOffsetDateTime {

	public static void main(String[] args) throws DatatypeConfigurationException {

		// 1. get new instance of XMLGregorianCalendar
		XMLGregorianCalendar xmlGregorianCalendar = DatatypeFactory
				.newInstance()
				.newXMLGregorianCalendar(
						"2022-12-23T18:28:34.438+05:30"
						);
		System.out.println("XMLGregorianCalendar/Date is :- \n" 
				+ xmlGregorianCalendar);


		// 2. convert XMLGregorianCalendar to OffsetDateTime
		OffsetDateTime offsetDateTime = xmlGregorianCalendar
				.toGregorianCalendar() // GregorianCalendar
				.toZonedDateTime() // ZonedDateTime
				.toOffsetDateTime(); // OffsetDateTime


		// 3. print to console
		System.out.print("\nConversion of XMLGregorianCalendar to an OffsetDateTime is :- \n"
				+ offsetDateTime);
	}
}

Output:

XMLGregorianCalendar/Date is :- 
2022-12-23T18:28:34.438+05:30

Conversion of XMLGregorianCalendar to an OffsetDateTime is :- 
2022-12-23T18:28:34.438+05:30

Related Articles:

References:

Happy Coding !!
Happy Learning !!

Java 8 – How to convert java.util.Date to an OffsetDateTime in different ways ?
Java 8 – How to convert OffsetDateTime to GregorianCalendar and vice-versa ?

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