java/10 : java.xml/javax/xml/datatype/DatatypeFactory.java

DatatypeFactory
https://openjdk.java.net/
GPLv2 + Classpath Exception
/*
 * Copyright (c) 2004, 2017, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package javax.xml.datatype;

import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.GregorianCalendar;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import com.sun.org.apache.xerces.internal.jaxp.datatype.DatatypeFactoryImpl;

Factory that creates new javax.xml.datatype Objects that map XML to/from Java Objects.  A new instance of the DatatypeFactory is created through the newInstance() method that uses the following implementation resolution mechanisms to determine an implementation: 

    If the system property specified by DATATYPEFACTORY_PROPERTY, "javax.xml.datatype.DatatypeFactory", exists, a class with the name of the property value is instantiated. Any Exception thrown during the instantiation process is wrapped as a DatatypeConfigurationException. 
   
      Use the configuration file "jaxp.properties". The file is in standard Properties format and typically located in the conf directory of the Java installation. It contains the fully qualified name of the implementation class with the key being the system property defined above. 

     The jaxp.properties file is read only once by the JAXP implementation
     and its values are then cached for future use.  If the file does not exist
     when the first attempt is made to read from it, no further attempts are
     made to check for its existence.  It is not possible to change the value
     of any property in jaxp.properties after it has been read for the first time.
   
   
     Use the service-provider loading facility, defined by the ServiceLoader class, to attempt to locate and load an implementation of the service using the default loading mechanism: the service-provider loading facility will use the current thread's context class loader to attempt to load the service. If the context class loader is null, the system class loader will be used. 
 In case of service
    configuration error, a DatatypeConfigurationException will be thrown. 
   
      The final mechanism is to attempt to instantiate the Class specified by DATATYPEFACTORY_IMPLEMENTATION_CLASS. Any Exception thrown during the instantiation process is wrapped as a DatatypeConfigurationException. 

Author: Joseph Fialli, Jeff Suttor, Neeraj Bajaj
Since: 1.5/**
 * Factory that creates new {@code javax.xml.datatype} {@code Object}s that map XML to/from Java {@code Object}s.
 * <p id="DatatypeFactory.newInstance">
 * A new instance of the {@code DatatypeFactory} is created through the {@link #newInstance()} method
 * that uses the following implementation resolution mechanisms to determine an implementation:
 * <ol>
 *    <li>
 *      If the system property specified by {@link #DATATYPEFACTORY_PROPERTY}, "{@code javax.xml.datatype.DatatypeFactory}",
 *      exists, a class with the name of the property value is instantiated.
 *      Any Exception thrown during the instantiation process is wrapped as a {@link DatatypeConfigurationException}.
 *    </li>
 *    <li>
 *      <p>
 *      Use the configuration file "jaxp.properties". The file is in standard
 *      {@link java.util.Properties} format and typically located in the
 *      {@code conf} directory of the Java installation. It contains the fully qualified
 *      name of the implementation class with the key being the system property
 *      defined above.
 *      <p>
 *      The jaxp.properties file is read only once by the JAXP implementation
 *      and its values are then cached for future use.  If the file does not exist
 *      when the first attempt is made to read from it, no further attempts are
 *      made to check for its existence.  It is not possible to change the value
 *      of any property in jaxp.properties after it has been read for the first time.
 *    </li>
 *    <li>
 *     <p>
 *     Use the service-provider loading facility, defined by the {@link java.util.ServiceLoader} class, to attempt
 *     to locate and load an implementation of the service using the {@linkplain
 *     java.util.ServiceLoader#load(java.lang.Class) default loading mechanism}:
 *     the service-provider loading facility will use the {@linkplain
 *     java.lang.Thread#getContextClassLoader() current thread's context class loader}
 *     to attempt to load the service. If the context class
 *     loader is null, the {@linkplain
 *     ClassLoader#getSystemClassLoader() system class loader} will be used.
 *     <p>
 *     In case of {@link java.util.ServiceConfigurationError service
 *     configuration error}, a {@link javax.xml.datatype.DatatypeConfigurationException}
 *     will be thrown.
 *    </li>
 *    <li>
 *      <p>
 *      The final mechanism is to attempt to instantiate the {@code Class} specified by
 *      {@link #DATATYPEFACTORY_IMPLEMENTATION_CLASS}.
 *      Any Exception thrown during the instantiation process is wrapped as a {@link DatatypeConfigurationException}.
 *    </li>
 * </ol>
 *
 * @author Joseph Fialli
 * @author Jeff Suttor
 * @author Neeraj Bajaj
 *
 * @since 1.5
 */
public abstract class DatatypeFactory {

    Default property name as defined in JSR 206: Java(TM) API for XML Processing (JAXP) 1.3.
Default value is javax.xml.datatype.DatatypeFactory. /**
     * Default property name as defined in JSR 206: Java(TM) API for XML Processing (JAXP) 1.3.
     *
     * <p>Default value is {@code javax.xml.datatype.DatatypeFactory}.
     */
    public static final String DATATYPEFACTORY_PROPERTY =
            // We use a String constant here, rather than calling
            // DatatypeFactory.class.getName() - in order to make javadoc
            // generate a See Also: Constant Field Value link.
            "javax.xml.datatype.DatatypeFactory";

    Default implementation class name as defined in
JSR 206: Java(TM) API for XML Processing (JAXP) 1.3.
Implementers should specify the name of an appropriate class
to be instantiated if no other implementation resolution mechanism
succeeds.
Users should not refer to this field; it is intended only to
document a factory implementation detail.
/**
     * Default implementation class name as defined in
     * <em>JSR 206: Java(TM) API for XML Processing (JAXP) 1.3</em>.
     *
     * <p>Implementers should specify the name of an appropriate class
     * to be instantiated if no other implementation resolution mechanism
     * succeeds.
     *
     * <p>Users should not refer to this field; it is intended only to
     * document a factory implementation detail.
     */
    public static final String DATATYPEFACTORY_IMPLEMENTATION_CLASS =
        // We use new String() here to prevent javadoc from generating
        // a See Also: Constant Field Value link.
        new String("com.sun.org.apache.xerces.internal.jaxp.datatype.DatatypeFactoryImpl");

    http://www.w3.org/TR/xpath-datamodel/#xdtschema defines two regexps
to constrain the value space of dayTimeDuration ([^YM]*[DT].*)
and yearMonthDuration ([^DT]*). Note that these expressions rely on
the fact that the value must be an xs:Duration, they simply exclude
some Durations.
/**
     * http://www.w3.org/TR/xpath-datamodel/#xdtschema defines two regexps
     * to constrain the value space of dayTimeDuration ([^YM]*[DT].*)
     * and yearMonthDuration ([^DT]*). Note that these expressions rely on
     * the fact that the value must be an xs:Duration, they simply exclude
     * some Durations.
     */
    private static final Pattern XDTSCHEMA_YMD =
        Pattern.compile("[^DT]*");

    private static final Pattern XDTSCHEMA_DTD =
        Pattern.compile("[^YM]*[DT].*");

    Protected constructor to prevent instantiation outside of package.
Use newInstance() to create a DatatypeFactory. /**
     * Protected constructor to prevent instantiation outside of package.
     *
     * <p>Use {@link #newInstance()} to create a {@code DatatypeFactory}.
     */
    protected DatatypeFactory() {
    }

    Creates a new instance of the DatatypeFactory builtin system-default
implementation. 
Returns: A new instance of the DatatypeFactory builtin system-default implementation.
Since: 9/**
     * Creates a new instance of the {@code DatatypeFactory} {@linkplain
     * #DATATYPEFACTORY_IMPLEMENTATION_CLASS builtin system-default
     * implementation}.
     *
     * @return A new instance of the {@code DatatypeFactory} builtin
     *         system-default implementation.
     *
     * @since 9
     */
    public static DatatypeFactory newDefaultInstance() {
        return new DatatypeFactoryImpl();
    }

    Obtain a new instance of a DatatypeFactory. The implementation resolution mechanisms are defined in this Class's documentation. 
Throws: DatatypeConfigurationException – If the implementation is not
  available or cannot be instantiated.
See Also: newInstance(String factoryClassName, ClassLoader classLoader)
Returns: New instance of a DatatypeFactory/**
     * Obtain a new instance of a {@code DatatypeFactory}.
     *
     * <p>The implementation resolution mechanisms are <a href="#DatatypeFactory.newInstance">defined</a> in this
     * {@code Class}'s documentation.
     *
     * @return New instance of a {@code DatatypeFactory}
     *
     * @throws DatatypeConfigurationException If the implementation is not
     *   available or cannot be instantiated.
     *
     * @see #newInstance(String factoryClassName, ClassLoader classLoader)
     */
    public static DatatypeFactory newInstance()
            throws DatatypeConfigurationException {

            return FactoryFinder.find(
                    /* The default property name according to the JAXP spec */
                    DatatypeFactory.class,
                    /* The fallback implementation class name */
                    DATATYPEFACTORY_IMPLEMENTATION_CLASS);
    }

    Obtain a new instance of a DatatypeFactory from class name. This function is useful when there are multiple providers in the classpath. It gives more control to the application as it can specify which provider should be loaded. Once an application has obtained a reference to a DatatypeFactory it can use the factory to configure and obtain datatype instances. 
Tip for Trouble-shooting
Setting the jaxp.debug system property will cause this method to print a lot of debug messages to System.err about what it is doing and where it is looking at. 
 If you have problems try:
java -Djaxp.debug=1 YourProgram ....

Params: factoryClassName – fully qualified factory class name that provides implementation of javax.xml.datatype.DatatypeFactory.
classLoader – ClassLoader used to load the factory class. If null current Thread's context classLoader is used to load the factory class.
Throws: DatatypeConfigurationException – if factoryClassName is null, or the factory class cannot be loaded, instantiated.
See Also: newInstance()
Returns: New instance of a DatatypeFactory
Since: 1.6/**
     * Obtain a new instance of a {@code DatatypeFactory} from class name.
     * This function is useful when there are multiple providers in the classpath.
     * It gives more control to the application as it can specify which provider
     * should be loaded.
     *
     * <p>Once an application has obtained a reference to a {@code DatatypeFactory}
     * it can use the factory to configure and obtain datatype instances.
     *
     *
     * <h2>Tip for Trouble-shooting</h2>
     * <p>Setting the {@code jaxp.debug} system property will cause
     * this method to print a lot of debug messages
     * to {@code System.err} about what it is doing and where it is looking at.
     *
     * <p> If you have problems try:
     * <pre>
     * java -Djaxp.debug=1 YourProgram ....
     * </pre>
     *
     * @param factoryClassName fully qualified factory class name that provides implementation of {@code javax.xml.datatype.DatatypeFactory}.
     *
     * @param classLoader {@code ClassLoader} used to load the factory class. If {@code null}
     *                     current {@code Thread}'s context classLoader is used to load the factory class.
     *
     * @return New instance of a {@code DatatypeFactory}
     *
     * @throws DatatypeConfigurationException if {@code factoryClassName} is {@code null}, or
     *                                   the factory class cannot be loaded, instantiated.
     *
     * @see #newInstance()
     *
     * @since 1.6
     */
    public static DatatypeFactory newInstance(String factoryClassName, ClassLoader classLoader)
        throws DatatypeConfigurationException {
        return FactoryFinder.newInstance(DatatypeFactory.class,
                    factoryClassName, classLoader, false);
     }

    Obtain a new instance of a Duration specifying the Duration as its string representation, "PnYnMnDTnHnMnS", as defined in XML Schema 1.0 section 3.2.6.1. XML Schema Part 2: Datatypes, 3.2.6 duration, defines duration as: 

duration represents a duration of time.
The value space of duration is a six-dimensional space where the coordinates designate the
Gregorian year, month, day, hour, minute, and second components defined in Section 5.5.3.2 of [ISO 8601], respectively.
These components are ordered in their significance by their order of appearance i.e. as
year, month, day, hour, minute, and second.

All six values are set and available from the created Duration 
The XML Schema specification states that values can be of an arbitrary size. Implementations may chose not to or be incapable of supporting arbitrarily large and/or small values. An UnsupportedOperationException will be thrown with a message indicating implementation limits if implementation capacities are exceeded. 
Params: lexicalRepresentation – String representation of a Duration.
Throws: IllegalArgumentException – If lexicalRepresentation is not a valid representation of a Duration.
UnsupportedOperationException – If implementation cannot support requested values.
NullPointerException – if lexicalRepresentation is null.
Returns: New Duration created from parsing the lexicalRepresentation./**
     * Obtain a new instance of a {@code Duration}
     * specifying the {@code Duration} as its string representation, "PnYnMnDTnHnMnS",
     * as defined in XML Schema 1.0 section 3.2.6.1.
     *
     * <p>XML Schema Part 2: Datatypes, 3.2.6 duration, defines {@code duration} as:
     * <blockquote>
     * duration represents a duration of time.
     * The value space of duration is a six-dimensional space where the coordinates designate the
     * Gregorian year, month, day, hour, minute, and second components defined in Section 5.5.3.2 of [ISO 8601], respectively.
     * These components are ordered in their significance by their order of appearance i.e. as
     * year, month, day, hour, minute, and second.
     * </blockquote>
     * <p>All six values are set and available from the created {@link Duration}
     *
     * <p>The XML Schema specification states that values can be of an arbitrary size.
     * Implementations may chose not to or be incapable of supporting arbitrarily large and/or small values.
     * An {@link UnsupportedOperationException} will be thrown with a message indicating implementation limits
     * if implementation capacities are exceeded.
     *
     * @param lexicalRepresentation {@code String} representation of a {@code Duration}.
     *
     * @return New {@code Duration} created from parsing the {@code lexicalRepresentation}.
     *
     * @throws IllegalArgumentException If {@code lexicalRepresentation} is not a valid representation of a {@code Duration}.
     * @throws UnsupportedOperationException If implementation cannot support requested values.
     * @throws NullPointerException if {@code lexicalRepresentation} is {@code null}.
     */
    public abstract Duration newDuration(final String lexicalRepresentation);

    Obtain a new instance of a Duration specifying the Duration as milliseconds. XML Schema Part 2: Datatypes, 3.2.6 duration, defines duration as: 

duration represents a duration of time.
The value space of duration is a six-dimensional space where the coordinates designate the
Gregorian year, month, day, hour, minute, and second components defined in Section 5.5.3.2 of [ISO 8601], respectively.
These components are ordered in their significance by their order of appearance i.e. as
year, month, day, hour, minute, and second.

All six values are set by computing their values from the specified milliseconds and are available using the get methods of the created Duration. The values conform to and are defined by: 

  ISO 8601:2000(E) Section 5.5.3.2 Alternative format
  
    W3C XML Schema 1.0 Part 2, Appendix D, ISO 8601 Date and Time Formats
  
  XMLGregorianCalendar Date/Time Datatype Field Mapping Between XML Schema 1.0 and Java Representation

The default start instance is defined by GregorianCalendar's use of the start of the epoch: i.e., Calendar.YEAR = 1970, Calendar.MONTH = Calendar.JANUARY, Calendar.DATE = 1, etc. This is important as there are variations in the Gregorian Calendar, e.g. leap years have different days in the month = Calendar.FEBRUARY so the result of Duration.getMonths() and Duration.getDays() can be influenced. 
Params: durationInMilliSeconds – Duration in milliseconds to create.
Returns: New Duration representing durationInMilliSeconds./**
     * Obtain a new instance of a {@code Duration}
     * specifying the {@code Duration} as milliseconds.
     *
     * <p>XML Schema Part 2: Datatypes, 3.2.6 duration, defines {@code duration} as:
     * <blockquote>
     * duration represents a duration of time.
     * The value space of duration is a six-dimensional space where the coordinates designate the
     * Gregorian year, month, day, hour, minute, and second components defined in Section 5.5.3.2 of [ISO 8601], respectively.
     * These components are ordered in their significance by their order of appearance i.e. as
     * year, month, day, hour, minute, and second.
     * </blockquote>
     * <p>All six values are set by computing their values from the specified milliseconds
     * and are available using the {@code get} methods of  the created {@link Duration}.
     * The values conform to and are defined by:
     * <ul>
     *   <li>ISO 8601:2000(E) Section 5.5.3.2 Alternative format</li>
     *   <li><a href="http://www.w3.org/TR/xmlschema-2/#isoformats">
     *     W3C XML Schema 1.0 Part 2, Appendix D, ISO 8601 Date and Time Formats</a>
     *   </li>
     *   <li>{@link XMLGregorianCalendar}  Date/Time Datatype Field Mapping Between XML Schema 1.0 and Java Representation</li>
     * </ul>
     *
     * <p>The default start instance is defined by {@link GregorianCalendar}'s use of the start of the epoch: i.e.,
     * {@link java.util.Calendar#YEAR} = 1970,
     * {@link java.util.Calendar#MONTH} = {@link java.util.Calendar#JANUARY},
     * {@link java.util.Calendar#DATE} = 1, etc.
     * This is important as there are variations in the Gregorian Calendar,
     * e.g. leap years have different days in the month = {@link java.util.Calendar#FEBRUARY}
     * so the result of {@link Duration#getMonths()} and {@link Duration#getDays()} can be influenced.
     *
     * @param durationInMilliSeconds Duration in milliseconds to create.
     *
     * @return New {@code Duration} representing {@code durationInMilliSeconds}.
     */
    public abstract Duration newDuration(final long durationInMilliSeconds);

    Obtain a new instance of a Duration specifying the Duration as isPositive, years, months, days, hours, minutes, seconds. The XML Schema specification states that values can be of an arbitrary size. Implementations may chose not to or be incapable of supporting arbitrarily large and/or small values. An UnsupportedOperationException will be thrown with a message indicating implementation limits if implementation capacities are exceeded. 
A null value indicates that field is not set. 
Params: isPositive – Set to false to create a negative duration. When the length of the duration is zero, this parameter will be ignored.
years – of this Duration
months – of this Duration
days – of this Duration
hours – of this Duration
minutes – of this Duration
seconds – of this Duration
Throws: IllegalArgumentException – If the values are not a valid representation of a Duration: if all the fields (years, months, ...) are null or if any of the fields is negative.
UnsupportedOperationException – If implementation cannot support requested values.
Returns: New Duration created from the specified values./**
     * Obtain a new instance of a {@code Duration}
     * specifying the {@code Duration} as isPositive, years, months, days, hours, minutes, seconds.
     *
     * <p>The XML Schema specification states that values can be of an arbitrary size.
     * Implementations may chose not to or be incapable of supporting arbitrarily large and/or small values.
     * An {@link UnsupportedOperationException} will be thrown with a message indicating implementation limits
     * if implementation capacities are exceeded.
     *
     * <p>A {@code null} value indicates that field is not set.
     *
     * @param isPositive Set to {@code false} to create a negative duration. When the length
     *   of the duration is zero, this parameter will be ignored.
     * @param years of this {@code Duration}
     * @param months of this {@code Duration}
     * @param days of this {@code Duration}
     * @param hours of this {@code Duration}
     * @param minutes of this {@code Duration}
     * @param seconds of this {@code Duration}
     *
     * @return New {@code Duration} created from the specified values.
     *
     * @throws IllegalArgumentException If the values are not a valid representation of a
     * {@code Duration}: if all the fields (years, months, ...) are null or
     * if any of the fields is negative.
     * @throws UnsupportedOperationException If implementation cannot support requested values.
     */
    public abstract Duration newDuration(
            final boolean isPositive,
            final BigInteger years,
            final BigInteger months,
            final BigInteger days,
            final BigInteger hours,
            final BigInteger minutes,
            final BigDecimal seconds);

    Obtain a new instance of a Duration specifying the Duration as isPositive, years, months, days, hours, minutes, seconds. A DatatypeConstants.FIELD_UNDEFINED value indicates that field is not set. 
Params: isPositive – Set to false to create a negative duration. When the length of the duration is zero, this parameter will be ignored.
years – of this Duration
months – of this Duration
days – of this Duration
hours – of this Duration
minutes – of this Duration
seconds – of this Duration
Throws: IllegalArgumentException – If the values are not a valid representation of a Duration: if any of the fields is negative.
See Also: newDuration(boolean isPositive, BigInteger years, BigInteger months, BigInteger days, BigInteger hours, BigInteger minutes, BigDecimal seconds)
Returns: New Duration created from the specified values./**
     * Obtain a new instance of a {@code Duration}
     * specifying the {@code Duration} as isPositive, years, months, days, hours, minutes, seconds.
     *
     * <p>A {@link DatatypeConstants#FIELD_UNDEFINED} value indicates that field is not set.
     *
     * @param isPositive Set to {@code false} to create a negative duration. When the length
     *   of the duration is zero, this parameter will be ignored.
     * @param years of this {@code Duration}
     * @param months of this {@code Duration}
     * @param days of this {@code Duration}
     * @param hours of this {@code Duration}
     * @param minutes of this {@code Duration}
     * @param seconds of this {@code Duration}
     *
     * @return New {@code Duration} created from the specified values.
     *
     * @throws IllegalArgumentException If the values are not a valid representation of a
     * {@code Duration}: if any of the fields is negative.
     *
     * @see #newDuration(
     *   boolean isPositive,
     *   BigInteger years,
     *   BigInteger months,
     *   BigInteger days,
     *   BigInteger hours,
     *   BigInteger minutes,
     *   BigDecimal seconds)
     */
    public Duration newDuration(
            final boolean isPositive,
            final int years,
            final int months,
            final int days,
            final int hours,
            final int minutes,
            final int seconds) {

            // years may not be set
            BigInteger realYears = (years != DatatypeConstants.FIELD_UNDEFINED) ? BigInteger.valueOf((long) years) : null;

            // months may not be set
            BigInteger realMonths = (months != DatatypeConstants.FIELD_UNDEFINED) ? BigInteger.valueOf((long) months) : null;

            // days may not be set
            BigInteger realDays = (days != DatatypeConstants.FIELD_UNDEFINED) ? BigInteger.valueOf((long) days) : null;

            // hours may not be set
            BigInteger realHours = (hours != DatatypeConstants.FIELD_UNDEFINED) ? BigInteger.valueOf((long) hours) : null;

            // minutes may not be set
            BigInteger realMinutes = (minutes != DatatypeConstants.FIELD_UNDEFINED) ? BigInteger.valueOf((long) minutes) : null;

            // seconds may not be set
            BigDecimal realSeconds = (seconds != DatatypeConstants.FIELD_UNDEFINED) ? BigDecimal.valueOf((long) seconds) : null;

                    return newDuration(
                            isPositive,
                            realYears,
                            realMonths,
                            realDays,
                            realHours,
                            realMinutes,
                            realSeconds
                    );
            }

    Create a Duration of type xdt:dayTimeDuration by parsing its String representation, "PnDTnHnMnS", 
  XQuery 1.0 and XPath 2.0 Data Model, xdt:dayTimeDuration.
The datatype xdt:dayTimeDuration is a subtype of xs:duration whose lexical representation contains only day, hour, minute, and second components. This datatype resides in the namespace http://www.w3.org/2003/11/xpath-datatypes. 
All four values are set and available from the created Duration 
The XML Schema specification states that values can be of an arbitrary size. Implementations may chose not to or be incapable of supporting arbitrarily large and/or small values. An UnsupportedOperationException will be thrown with a message indicating implementation limits if implementation capacities are exceeded. 
Params: lexicalRepresentation – Lexical representation of a duration.
Throws: IllegalArgumentException – If lexicalRepresentation is not a valid representation of a Duration expressed only in terms of days and time.
UnsupportedOperationException – If implementation cannot support requested values.
NullPointerException – If lexicalRepresentation is null.
Returns: New Duration created using the specified lexicalRepresentation./**
     * Create a {@code Duration} of type {@code xdt:dayTimeDuration}
     * by parsing its {@code String} representation,
     * "<em>PnDTnHnMnS</em>", <a href="http://www.w3.org/TR/xpath-datamodel#dayTimeDuration">
     *   XQuery 1.0 and XPath 2.0 Data Model, xdt:dayTimeDuration</a>.
     *
     * <p>The datatype {@code xdt:dayTimeDuration} is a subtype of {@code xs:duration}
     * whose lexical representation contains only day, hour, minute, and second components.
     * This datatype resides in the namespace {@code http://www.w3.org/2003/11/xpath-datatypes}.
     *
     * <p>All four values are set and available from the created {@link Duration}
     *
     * <p>The XML Schema specification states that values can be of an arbitrary size.
     * Implementations may chose not to or be incapable of supporting arbitrarily large and/or small values.
     * An {@link UnsupportedOperationException} will be thrown with a message indicating implementation limits
     * if implementation capacities are exceeded.
     *
     * @param lexicalRepresentation Lexical representation of a duration.
     *
     * @return New {@code Duration} created using the specified {@code lexicalRepresentation}.
     *
     * @throws IllegalArgumentException If {@code lexicalRepresentation} is
     *         not a valid representation of a {@code Duration} expressed only in terms of days and time.
     * @throws UnsupportedOperationException If implementation cannot support requested values.
     * @throws NullPointerException If {@code lexicalRepresentation} is {@code null}.
     */
    public Duration newDurationDayTime(final String lexicalRepresentation) {
        // lexicalRepresentation must be non-null
        if (lexicalRepresentation == null) {
            throw new NullPointerException(
                "Trying to create an xdt:dayTimeDuration with an invalid"
                + " lexical representation of \"null\"");
        }

        // test lexicalRepresentation against spec regex
        Matcher matcher = XDTSCHEMA_DTD.matcher(lexicalRepresentation);
        if (!matcher.matches()) {
            throw new IllegalArgumentException(
                "Trying to create an xdt:dayTimeDuration with an invalid"
                + " lexical representation of \"" + lexicalRepresentation
                + "\", data model requires years and months only.");
        }

        return newDuration(lexicalRepresentation);
    }

    Create a Duration of type xdt:dayTimeDuration using the specified milliseconds as defined in 
  XQuery 1.0 and XPath 2.0 Data Model, xdt:dayTimeDuration.
The datatype xdt:dayTimeDuration is a subtype of xs:duration whose lexical representation contains only day, hour, minute, and second components. This datatype resides in the namespace http://www.w3.org/2003/11/xpath-datatypes. 
All four values are set by computing their values from the specified milliseconds and are available using the get methods of the created Duration. The values conform to and are defined by: 

  ISO 8601:2000(E) Section 5.5.3.2 Alternative format
  
    W3C XML Schema 1.0 Part 2, Appendix D, ISO 8601 Date and Time Formats
  
  XMLGregorianCalendar Date/Time Datatype Field Mapping Between XML Schema 1.0 and Java Representation

The default start instance is defined by GregorianCalendar's use of the start of the epoch: i.e., Calendar.YEAR = 1970, Calendar.MONTH = Calendar.JANUARY, Calendar.DATE = 1, etc. This is important as there are variations in the Gregorian Calendar, e.g. leap years have different days in the month = Calendar.FEBRUARY so the result of Duration.getDays() can be influenced. 
Any remaining milliseconds after determining the day, hour, minute and second are discarded.
Params: durationInMilliseconds – Milliseconds of Duration to create.
See Also: 
     *   XQuery 1.0 and XPath 2.0 Data Model, xdt:dayTimeDuration
Returns: New Duration created with the specified durationInMilliseconds./**
     * Create a {@code Duration} of type {@code xdt:dayTimeDuration}
     * using the specified milliseconds as defined in
     * <a href="http://www.w3.org/TR/xpath-datamodel#dayTimeDuration">
     *   XQuery 1.0 and XPath 2.0 Data Model, xdt:dayTimeDuration</a>.
     *
     * <p>The datatype {@code xdt:dayTimeDuration} is a subtype of {@code xs:duration}
     * whose lexical representation contains only day, hour, minute, and second components.
     * This datatype resides in the namespace {@code http://www.w3.org/2003/11/xpath-datatypes}.
     *
     * <p>All four values are set by computing their values from the specified milliseconds
     * and are available using the {@code get} methods of  the created {@link Duration}.
     * The values conform to and are defined by:
     * <ul>
     *   <li>ISO 8601:2000(E) Section 5.5.3.2 Alternative format</li>
     *   <li><a href="http://www.w3.org/TR/xmlschema-2/#isoformats">
     *     W3C XML Schema 1.0 Part 2, Appendix D, ISO 8601 Date and Time Formats</a>
     *   </li>
     *   <li>{@link XMLGregorianCalendar}  Date/Time Datatype Field Mapping Between XML Schema 1.0 and Java Representation</li>
     * </ul>
     *
     * <p>The default start instance is defined by {@link GregorianCalendar}'s use of the start of the epoch: i.e.,
     * {@link java.util.Calendar#YEAR} = 1970,
     * {@link java.util.Calendar#MONTH} = {@link java.util.Calendar#JANUARY},
     * {@link java.util.Calendar#DATE} = 1, etc.
     * This is important as there are variations in the Gregorian Calendar,
     * e.g. leap years have different days in the month = {@link java.util.Calendar#FEBRUARY}
     * so the result of {@link Duration#getDays()} can be influenced.
     *
     * <p>Any remaining milliseconds after determining the day, hour, minute and second are discarded.
     *
     * @param durationInMilliseconds Milliseconds of {@code Duration} to create.
     *
     * @return New {@code Duration} created with the specified {@code durationInMilliseconds}.
     *
     * @see <a href="http://www.w3.org/TR/xpath-datamodel#dayTimeDuration">
     *   XQuery 1.0 and XPath 2.0 Data Model, xdt:dayTimeDuration</a>
     */
    public Duration newDurationDayTime(final long durationInMilliseconds) {

            return newDuration(durationInMilliseconds);
    }

    Create a Duration of type xdt:dayTimeDuration using the specified day, hour, minute and second as defined in 
  XQuery 1.0 and XPath 2.0 Data Model, xdt:dayTimeDuration.
The datatype xdt:dayTimeDuration is a subtype of xs:duration whose lexical representation contains only day, hour, minute, and second components. This datatype resides in the namespace http://www.w3.org/2003/11/xpath-datatypes. 
The XML Schema specification states that values can be of an arbitrary size. Implementations may chose not to or be incapable of supporting arbitrarily large and/or small values. An UnsupportedOperationException will be thrown with a message indicating implementation limits if implementation capacities are exceeded. 
A null value indicates that field is not set. 
Params: isPositive – Set to false to create a negative duration. When the length of the duration is zero, this parameter will be ignored.
day – Day of Duration.
hour – Hour of Duration.
minute – Minute of Duration.
second – Second of Duration.
Throws: IllegalArgumentException – If the values are not a valid representation of a Duration: if all the fields (day, hour, ...) are null or if any of the fields is negative.
UnsupportedOperationException – If implementation cannot support requested values.
Returns: New Duration created with the specified day, hour, minute and second./**
     * Create a {@code Duration} of type {@code xdt:dayTimeDuration} using the specified
     * {@code day}, {@code hour}, {@code minute} and {@code second} as defined in
     * <a href="http://www.w3.org/TR/xpath-datamodel#dayTimeDuration">
     *   XQuery 1.0 and XPath 2.0 Data Model, xdt:dayTimeDuration</a>.
     *
     * <p>The datatype {@code xdt:dayTimeDuration} is a subtype of {@code xs:duration}
     * whose lexical representation contains only day, hour, minute, and second components.
     * This datatype resides in the namespace {@code http://www.w3.org/2003/11/xpath-datatypes}.
     *
     * <p>The XML Schema specification states that values can be of an arbitrary size.
     * Implementations may chose not to or be incapable of supporting arbitrarily large and/or small values.
     * An {@link UnsupportedOperationException} will be thrown with a message indicating implementation limits
     * if implementation capacities are exceeded.
     *
     * <p>A {@code null} value indicates that field is not set.
     *
     * @param isPositive Set to {@code false} to create a negative duration. When the length
     *   of the duration is zero, this parameter will be ignored.
     * @param day Day of {@code Duration}.
     * @param hour Hour of {@code Duration}.
     * @param minute Minute of {@code Duration}.
     * @param second Second of {@code Duration}.
     *
     * @return New {@code Duration} created with the specified {@code day}, {@code hour}, {@code minute}
     * and {@code second}.
     *
     * @throws IllegalArgumentException If the values are not a valid representation of a
     * {@code Duration}: if all the fields (day, hour, ...) are null or
     * if any of the fields is negative.
     * @throws UnsupportedOperationException If implementation cannot support requested values.
     */
    public Duration newDurationDayTime(
            final boolean isPositive,
            final BigInteger day,
            final BigInteger hour,
            final BigInteger minute,
            final BigInteger second) {

            return newDuration(
                    isPositive,
                    null,  // years
                    null, // months
                    day,
                    hour,
                    minute,
                    (second != null)? new BigDecimal(second):null
            );
    }

    Create a Duration of type xdt:dayTimeDuration using the specified day, hour, minute and second as defined in 
  XQuery 1.0 and XPath 2.0 Data Model, xdt:dayTimeDuration.
The datatype xdt:dayTimeDuration is a subtype of xs:duration whose lexical representation contains only day, hour, minute, and second components. This datatype resides in the namespace http://www.w3.org/2003/11/xpath-datatypes. 
A DatatypeConstants.FIELD_UNDEFINED value indicates that field is not set. 
Params: isPositive – Set to false to create a negative duration. When the length of the duration is zero, this parameter will be ignored.
day – Day of Duration.
hour – Hour of Duration.
minute – Minute of Duration.
second – Second of Duration.
Throws: IllegalArgumentException – If the values are not a valid representation of a Duration: if any of the fields (day, hour, ...) is negative.
Returns: New Duration created with the specified day, hour, minute and second./**
     * Create a {@code Duration} of type {@code xdt:dayTimeDuration} using the specified
     * {@code day}, {@code hour}, {@code minute} and {@code second} as defined in
     * <a href="http://www.w3.org/TR/xpath-datamodel#dayTimeDuration">
     *   XQuery 1.0 and XPath 2.0 Data Model, xdt:dayTimeDuration</a>.
     *
     * <p>The datatype {@code xdt:dayTimeDuration} is a subtype of {@code xs:duration}
     * whose lexical representation contains only day, hour, minute, and second components.
     * This datatype resides in the namespace {@code http://www.w3.org/2003/11/xpath-datatypes}.
     *
     * <p>A {@link DatatypeConstants#FIELD_UNDEFINED} value indicates that field is not set.
     *
     * @param isPositive Set to {@code false} to create a negative duration. When the length
     *   of the duration is zero, this parameter will be ignored.
     * @param day Day of {@code Duration}.
     * @param hour Hour of {@code Duration}.
     * @param minute Minute of {@code Duration}.
     * @param second Second of {@code Duration}.
     *
     * @return New {@code Duration} created with the specified {@code day}, {@code hour}, {@code minute}
     * and {@code second}.
     *
     * @throws IllegalArgumentException If the values are not a valid representation of a
     * {@code Duration}: if any of the fields (day, hour, ...) is negative.
     */
    public Duration newDurationDayTime(
            final boolean isPositive,
            final int day,
            final int hour,
            final int minute,
            final int second) {

                    return newDurationDayTime(
                            isPositive,
                            BigInteger.valueOf((long) day),
                            BigInteger.valueOf((long) hour),
                            BigInteger.valueOf((long) minute),
                            BigInteger.valueOf((long) second)
                            );
            }

    Create a Duration of type xdt:yearMonthDuration by parsing its String representation, "PnYnM", 
  XQuery 1.0 and XPath 2.0 Data Model, xdt:yearMonthDuration.
The datatype xdt:yearMonthDuration is a subtype of xs:duration whose lexical representation contains only year and month components. This datatype resides in the namespace XMLConstants.W3C_XPATH_DATATYPE_NS_URI. 
Both values are set and available from the created Duration 
The XML Schema specification states that values can be of an arbitrary size. Implementations may chose not to or be incapable of supporting arbitrarily large and/or small values. An UnsupportedOperationException will be thrown with a message indicating implementation limits if implementation capacities are exceeded. 
Params: lexicalRepresentation – Lexical representation of a duration.
Throws: IllegalArgumentException – If lexicalRepresentation is not a valid representation of a Duration expressed only in terms of years and months.
UnsupportedOperationException – If implementation cannot support requested values.
NullPointerException – If lexicalRepresentation is null.
Returns: New Duration created using the specified lexicalRepresentation./**
     * Create a {@code Duration} of type {@code xdt:yearMonthDuration}
     * by parsing its {@code String} representation,
     * "<em>PnYnM</em>", <a href="http://www.w3.org/TR/xpath-datamodel#yearMonthDuration">
     *   XQuery 1.0 and XPath 2.0 Data Model, xdt:yearMonthDuration</a>.
     *
     * <p>The datatype {@code xdt:yearMonthDuration} is a subtype of {@code xs:duration}
     * whose lexical representation contains only year and month components.
     * This datatype resides in the namespace {@link javax.xml.XMLConstants#W3C_XPATH_DATATYPE_NS_URI}.
     *
     * <p>Both values are set and available from the created {@link Duration}
     *
     * <p>The XML Schema specification states that values can be of an arbitrary size.
     * Implementations may chose not to or be incapable of supporting
     * arbitrarily large and/or small values. An {@link UnsupportedOperationException}
     * will be thrown with a message indicating implementation limits
     * if implementation capacities are exceeded.
     *
     * @param lexicalRepresentation Lexical representation of a duration.
     *
     * @return New {@code Duration} created using the specified {@code lexicalRepresentation}.
     *
     * @throws IllegalArgumentException If {@code lexicalRepresentation} is not a valid representation of a {@code Duration} expressed only in terms of years and months.
     * @throws UnsupportedOperationException If implementation cannot support requested values.
     * @throws NullPointerException If {@code lexicalRepresentation} is {@code null}.
     */
    public Duration newDurationYearMonth(
            final String lexicalRepresentation) {

        // lexicalRepresentation must be non-null
        if (lexicalRepresentation == null) {
            throw new NullPointerException(
                    "Trying to create an xdt:yearMonthDuration with an invalid"
                    + " lexical representation of \"null\"");
        }

        // test lexicalRepresentation against spec regex
        Matcher matcher = XDTSCHEMA_YMD.matcher(lexicalRepresentation);
        if (!matcher.matches()) {
            throw new IllegalArgumentException(
                    "Trying to create an xdt:yearMonthDuration with an invalid"
                    + " lexical representation of \"" + lexicalRepresentation
                    + "\", data model requires days and times only.");
        }

        return newDuration(lexicalRepresentation);
    }

    Create a Duration of type xdt:yearMonthDuration using the specified milliseconds as defined in 
  XQuery 1.0 and XPath 2.0 Data Model, xdt:yearMonthDuration.
The datatype xdt:yearMonthDuration is a subtype of xs:duration whose lexical representation contains only year and month components. This datatype resides in the namespace XMLConstants.W3C_XPATH_DATATYPE_NS_URI. 
Both values are set by computing their values from the specified milliseconds and are available using the get methods of the created Duration. The values conform to and are defined by: 

  ISO 8601:2000(E) Section 5.5.3.2 Alternative format
  
    W3C XML Schema 1.0 Part 2, Appendix D, ISO 8601 Date and Time Formats
  
  XMLGregorianCalendar Date/Time Datatype Field Mapping Between XML Schema 1.0 and Java Representation

The default start instance is defined by GregorianCalendar's use of the start of the epoch: i.e., Calendar.YEAR = 1970, Calendar.MONTH = Calendar.JANUARY, Calendar.DATE = 1, etc. This is important as there are variations in the Gregorian Calendar, e.g. leap years have different days in the month = Calendar.FEBRUARY so the result of Duration.getMonths() can be influenced. 
Any remaining milliseconds after determining the year and month are discarded.
Params: durationInMilliseconds – Milliseconds of Duration to create.
Returns: New Duration created using the specified durationInMilliseconds./**
     * Create a {@code Duration} of type {@code xdt:yearMonthDuration}
     * using the specified milliseconds as defined in
     * <a href="http://www.w3.org/TR/xpath-datamodel#yearMonthDuration">
     *   XQuery 1.0 and XPath 2.0 Data Model, xdt:yearMonthDuration</a>.
     *
     * <p>The datatype {@code xdt:yearMonthDuration} is a subtype of {@code xs:duration}
     * whose lexical representation contains only year and month components.
     * This datatype resides in the namespace {@link javax.xml.XMLConstants#W3C_XPATH_DATATYPE_NS_URI}.
     *
     * <p>Both values are set by computing their values from the specified milliseconds
     * and are available using the {@code get} methods of  the created {@link Duration}.
     * The values conform to and are defined by:
     * <ul>
     *   <li>ISO 8601:2000(E) Section 5.5.3.2 Alternative format</li>
     *   <li><a href="http://www.w3.org/TR/xmlschema-2/#isoformats">
     *     W3C XML Schema 1.0 Part 2, Appendix D, ISO 8601 Date and Time Formats</a>
     *   </li>
     *   <li>{@link XMLGregorianCalendar}  Date/Time Datatype Field Mapping Between XML Schema 1.0 and Java Representation</li>
     * </ul>
     *
     * <p>The default start instance is defined by {@link GregorianCalendar}'s use of the start of the epoch: i.e.,
     * {@link java.util.Calendar#YEAR} = 1970,
     * {@link java.util.Calendar#MONTH} = {@link java.util.Calendar#JANUARY},
     * {@link java.util.Calendar#DATE} = 1, etc.
     * This is important as there are variations in the Gregorian Calendar,
     * e.g. leap years have different days in the month = {@link java.util.Calendar#FEBRUARY}
     * so the result of {@link Duration#getMonths()} can be influenced.
     *
     * <p>Any remaining milliseconds after determining the year and month are discarded.
     *
     * @param durationInMilliseconds Milliseconds of {@code Duration} to create.
     *
     * @return New {@code Duration} created using the specified {@code durationInMilliseconds}.
     */
    public Duration newDurationYearMonth(
            final long durationInMilliseconds) {

        // create a Duration that only has sign, year & month
        // Duration is immutable, so need to create a new Duration
        // implementations may override this method in a more efficient way
        Duration fullDuration = newDuration(durationInMilliseconds);
        boolean isPositive = (fullDuration.getSign() == -1) ? false : true;
        BigInteger years =
            (BigInteger) fullDuration.getField(DatatypeConstants.YEARS);
        if (years == null) { years = BigInteger.ZERO; }
        BigInteger months =
            (BigInteger) fullDuration.getField(DatatypeConstants.MONTHS);
        if (months == null) { months = BigInteger.ZERO; }

        return newDurationYearMonth(isPositive, years, months);
    }

    Create a Duration of type xdt:yearMonthDuration using the specified year and month as defined in 
  XQuery 1.0 and XPath 2.0 Data Model, xdt:yearMonthDuration.
The XML Schema specification states that values can be of an arbitrary size. Implementations may chose not to or be incapable of supporting arbitrarily large and/or small values. An UnsupportedOperationException will be thrown with a message indicating implementation limits if implementation capacities are exceeded. 
A null value indicates that field is not set. 
Params: isPositive – Set to false to create a negative duration. When the length of the duration is zero, this parameter will be ignored.
year – Year of Duration.
month – Month of Duration.
Throws: IllegalArgumentException – If the values are not a valid representation of a Duration: if all of the fields (year, month) are null or if any of the fields is negative.
UnsupportedOperationException – If implementation cannot support requested values.
Returns: New Duration created using the specified year and month./**
     * Create a {@code Duration} of type {@code xdt:yearMonthDuration} using the specified
     * {@code year} and {@code month} as defined in
     * <a href="http://www.w3.org/TR/xpath-datamodel#yearMonthDuration">
     *   XQuery 1.0 and XPath 2.0 Data Model, xdt:yearMonthDuration</a>.
     *
     * <p>The XML Schema specification states that values can be of an arbitrary size.
     * Implementations may chose not to or be incapable of supporting arbitrarily large and/or small values.
     * An {@link UnsupportedOperationException} will be thrown with a message indicating implementation limits
     * if implementation capacities are exceeded.
     *
     * <p>A {@code null} value indicates that field is not set.
     *
     * @param isPositive Set to {@code false} to create a negative duration. When the length
     *   of the duration is zero, this parameter will be ignored.
     * @param year Year of {@code Duration}.
     * @param month Month of {@code Duration}.
     *
     * @return New {@code Duration} created using the specified {@code year} and {@code month}.
     *
     * @throws IllegalArgumentException If the values are not a valid representation of a
     * {@code Duration}: if all of the fields (year, month) are null or
     * if any of the fields is negative.
     * @throws UnsupportedOperationException If implementation cannot support requested values.
     */
    public Duration newDurationYearMonth(
            final boolean isPositive,
            final BigInteger year,
            final BigInteger month) {

            return newDuration(
                    isPositive,
                    year,
                    month,
                    null, // days
                    null, // hours
                    null, // minutes
                    null  // seconds
            );
    }

    Create a Duration of type xdt:yearMonthDuration using the specified year and month as defined in 
  XQuery 1.0 and XPath 2.0 Data Model, xdt:yearMonthDuration.
A DatatypeConstants.FIELD_UNDEFINED value indicates that field is not set. 
Params: isPositive – Set to false to create a negative duration. When the length of the duration is zero, this parameter will be ignored.
year – Year of Duration.
month – Month of Duration.
Throws: IllegalArgumentException – If the values are not a valid representation of a Duration: if any of the fields (year, month) is negative.
Returns: New Duration created using the specified year and month./**
     * Create a {@code Duration} of type {@code xdt:yearMonthDuration} using the specified
     * {@code year} and {@code month} as defined in
     * <a href="http://www.w3.org/TR/xpath-datamodel#yearMonthDuration">
     *   XQuery 1.0 and XPath 2.0 Data Model, xdt:yearMonthDuration</a>.
     *
     * <p>A {@link DatatypeConstants#FIELD_UNDEFINED} value indicates that field is not set.
     *
     * @param isPositive Set to {@code false} to create a negative duration. When the length
     *   of the duration is zero, this parameter will be ignored.
     * @param year Year of {@code Duration}.
     * @param month Month of {@code Duration}.
     *
     * @return New {@code Duration} created using the specified {@code year} and {@code month}.
     *
     * @throws IllegalArgumentException If the values are not a valid representation of a
     * {@code Duration}: if any of the fields (year, month) is negative.
     */
    public Duration newDurationYearMonth(
            final boolean isPositive,
            final int year,
            final int month) {

            return newDurationYearMonth(
                    isPositive,
                    BigInteger.valueOf((long) year),
                    BigInteger.valueOf((long) month));
            }

    Create a new instance of an XMLGregorianCalendar. All date/time datatype fields set to DatatypeConstants.FIELD_UNDEFINED or null. 
Returns: New XMLGregorianCalendar with all date/time datatype fields set to DatatypeConstants.FIELD_UNDEFINED or null./**
     * Create a new instance of an {@code XMLGregorianCalendar}.
     *
     * <p>All date/time datatype fields set to {@link DatatypeConstants#FIELD_UNDEFINED} or null.
     *
     * @return New {@code XMLGregorianCalendar} with all date/time datatype fields set to
     *   {@link DatatypeConstants#FIELD_UNDEFINED} or null.
     */
    public abstract XMLGregorianCalendar newXMLGregorianCalendar();

    Create a new XMLGregorianCalendar by parsing the String as a lexical representation.
Parsing the lexical string representation is defined in
XML Schema 1.0 Part 2, Section 3.2.[7-14].1,
Lexical Representation.
The string representation may not have any leading and trailing whitespaces.
The parsing is done field by field so that
the following holds for any lexically correct String x:
newXMLGregorianCalendar(x).toXMLFormat().equals(x)

Except for the noted lexical/canonical representation mismatches
listed in 
XML Schema 1.0 errata, Section 3.2.7.2.
Params: lexicalRepresentation – Lexical representation of one the eight XML Schema date/time datatypes.
Throws: IllegalArgumentException – If the lexicalRepresentation is not a valid XMLGregorianCalendar.
NullPointerException – If lexicalRepresentation is null.
Returns: XMLGregorianCalendar created from the lexicalRepresentation./**
     * Create a new XMLGregorianCalendar by parsing the String as a lexical representation.
     *
     * <p>Parsing the lexical string representation is defined in
     * <a href="http://www.w3.org/TR/xmlschema-2/#dateTime-order">XML Schema 1.0 Part 2, Section 3.2.[7-14].1,
     * <em>Lexical Representation</em>.</a>
     *
     * <p>The string representation may not have any leading and trailing whitespaces.
     *
     * <p>The parsing is done field by field so that
     * the following holds for any lexically correct String x:
     * <pre>
     * newXMLGregorianCalendar(x).toXMLFormat().equals(x)
     * </pre>
     * <p>Except for the noted lexical/canonical representation mismatches
     * listed in <a href="http://www.w3.org/2001/05/xmlschema-errata#e2-45">
     * XML Schema 1.0 errata, Section 3.2.7.2</a>.
     *
     * @param lexicalRepresentation Lexical representation of one the eight XML Schema date/time datatypes.
     *
     * @return {@code XMLGregorianCalendar} created from the {@code lexicalRepresentation}.
     *
     * @throws IllegalArgumentException If the {@code lexicalRepresentation} is not a valid {@code XMLGregorianCalendar}.
     * @throws NullPointerException If {@code lexicalRepresentation} is {@code null}.
     */
    public abstract XMLGregorianCalendar newXMLGregorianCalendar(final String lexicalRepresentation);

    Create an XMLGregorianCalendar from a GregorianCalendar. 
  Field by Field Conversion from GregorianCalendar to an XMLGregorianCalendar
  
    
       java.util.GregorianCalendar field
       javax.xml.datatype.XMLGregorianCalendar field
    
  
  
    
      ERA == GregorianCalendar.BC ? -YEAR : YEAR
      XMLGregorianCalendar.setYear(int year)
    
    
      MONTH + 1
      XMLGregorianCalendar.setMonth(int month)
    
    
      DAY_OF_MONTH
      XMLGregorianCalendar.setDay(int day)
    
    
      HOUR_OF_DAY, MINUTE, SECOND, MILLISECOND
      XMLGregorianCalendar.setTime(int hour, int minute, int second, BigDecimal fractional)
    
    
       (ZONE_OFFSET + DST_OFFSET) / (60*1000)

        (in minutes)
      
      XMLGregorianCalendar.setTimezone(int offset)^*
      
    
  

*conversion loss of information. It is not possible to represent a java.util.GregorianCalendar daylight savings timezone id in the XML Schema 1.0 date/time datatype representation. 
To compute the return value's TimeZone field, 

when this.getTimezone() != FIELD_UNDEFINED, create a java.util.TimeZone with a custom timezone id using the this.getTimezone().
else use the GregorianCalendar default timezone value for the host is defined as specified by java.util.TimeZone.getDefault().

Params: cal – java.util.GregorianCalendar used to create XMLGregorianCalendar
Throws: NullPointerException – If cal is null.
Returns: XMLGregorianCalendar created from java.util.GregorianCalendar/**
     * Create an {@code XMLGregorianCalendar} from a {@link GregorianCalendar}.
     *
     * <table class="striped">
     *   <caption>Field by Field Conversion from
     *          {@link GregorianCalendar} to an {@link XMLGregorianCalendar}</caption>
     *   <thead>
     *     <tr>
     *        <th scope="col">{@code java.util.GregorianCalendar} field</th>
     *        <th scope="col">{@code javax.xml.datatype.XMLGregorianCalendar} field</th>
     *     </tr>
     *   </thead>
     *   <tbody>
     *     <tr>
     *       <th scope="row">{@code ERA == GregorianCalendar.BC ? -YEAR : YEAR}</th>
     *       <td>{@link XMLGregorianCalendar#setYear(int year)}</td>
     *     </tr>
     *     <tr>
     *       <th scope="row">{@code MONTH + 1}</th>
     *       <td>{@link XMLGregorianCalendar#setMonth(int month)}</td>
     *     </tr>
     *     <tr>
     *       <th scope="row">{@code DAY_OF_MONTH}</th>
     *       <td>{@link XMLGregorianCalendar#setDay(int day)}</td>
     *     </tr>
     *     <tr>
     *       <th scope="row">{@code HOUR_OF_DAY, MINUTE, SECOND, MILLISECOND}</th>
     *       <td>{@link XMLGregorianCalendar#setTime(int hour, int minute, int second, BigDecimal fractional)}</td>
     *     </tr>
     *     <tr>
     *       <th scope="row">
     *         {@code (ZONE_OFFSET + DST_OFFSET) / (60*1000)}<br>
     *         <em>(in minutes)</em>
     *       </th>
     *       <td>{@link XMLGregorianCalendar#setTimezone(int offset)}<sup><em>*</em></sup>
     *       </td>
     *     </tr>
     *   </tbody>
     * </table>
     * <p><em>*</em>conversion loss of information. It is not possible to represent
     * a {@code java.util.GregorianCalendar} daylight savings timezone id in the
     * XML Schema 1.0 date/time datatype representation.
     *
     * <p>To compute the return value's {@code TimeZone} field,
     * <ul>
     * <li>when {@code this.getTimezone() != FIELD_UNDEFINED},
     * create a {@code java.util.TimeZone} with a custom timezone id
     * using the {@code this.getTimezone()}.</li>
     * <li>else use the {@code GregorianCalendar} default timezone value
     * for the host is defined as specified by
     * {@code java.util.TimeZone.getDefault()}.</li>
     * </ul>
     *
     * @param cal {@code java.util.GregorianCalendar} used to create {@code XMLGregorianCalendar}
     *
     * @return {@code XMLGregorianCalendar} created from {@code java.util.GregorianCalendar}
     *
     * @throws NullPointerException If {@code cal} is {@code null}.
     */
    public abstract XMLGregorianCalendar newXMLGregorianCalendar(final GregorianCalendar cal);

    Constructor allowing for complete value spaces allowed by W3C XML Schema 1.0 recommendation for xsd:dateTime and related builtin datatypes. Note that year parameter supports arbitrarily large numbers and fractionalSecond has infinite precision. A null value indicates that field is not set. 
Params: year – of XMLGregorianCalendar to be created.
month – of XMLGregorianCalendar to be created.
day – of XMLGregorianCalendar to be created.
hour – of XMLGregorianCalendar to be created.
minute – of XMLGregorianCalendar to be created.
second – of XMLGregorianCalendar to be created.
fractionalSecond – of XMLGregorianCalendar to be created.
timezone – of XMLGregorianCalendar to be created.
Throws: IllegalArgumentException – If any individual parameter's value is outside the maximum value constraint for the field as determined by the Date/Time Data Mapping table in XMLGregorianCalendar or if the composite values constitute an invalid XMLGregorianCalendar instance as determined by XMLGregorianCalendar.isValid().
Returns: XMLGregorianCalendar created from specified values./**
     * Constructor allowing for complete value spaces allowed by
     * W3C XML Schema 1.0 recommendation for xsd:dateTime and related
     * builtin datatypes. Note that {@code year} parameter supports
     * arbitrarily large numbers and fractionalSecond has infinite
     * precision.
     *
     * <p>A {@code null} value indicates that field is not set.
     *
     * @param year of {@code XMLGregorianCalendar} to be created.
     * @param month of {@code XMLGregorianCalendar} to be created.
     * @param day of {@code XMLGregorianCalendar} to be created.
     * @param hour of {@code XMLGregorianCalendar} to be created.
     * @param minute of {@code XMLGregorianCalendar} to be created.
     * @param second of {@code XMLGregorianCalendar} to be created.
     * @param fractionalSecond of {@code XMLGregorianCalendar} to be created.
     * @param timezone of {@code XMLGregorianCalendar} to be created.
     *
     * @return {@code XMLGregorianCalendar} created from specified values.
     *
     * @throws IllegalArgumentException If any individual parameter's value is outside the maximum value constraint for the field
     *   as determined by the Date/Time Data Mapping table in {@link XMLGregorianCalendar}
     *   or if the composite values constitute an invalid {@code XMLGregorianCalendar} instance
     *   as determined by {@link XMLGregorianCalendar#isValid()}.
     */
    public abstract XMLGregorianCalendar newXMLGregorianCalendar(
            final BigInteger year,
            final int month,
            final int day,
            final int hour,
            final int minute,
            final int second,
            final BigDecimal fractionalSecond,
            final int timezone);

    Constructor of value spaces that a java.util.GregorianCalendar instance would need to convert to an XMLGregorianCalendar instance. XMLGregorianCalendar eon and fractionalSecond are set to null 
A DatatypeConstants.FIELD_UNDEFINED value indicates that field is not set. 
Params: year – of XMLGregorianCalendar to be created.
month – of XMLGregorianCalendar to be created.
day – of XMLGregorianCalendar to be created.
hour – of XMLGregorianCalendar to be created.
minute – of XMLGregorianCalendar to be created.
second – of XMLGregorianCalendar to be created.
millisecond – of XMLGregorianCalendar to be created.
timezone – of XMLGregorianCalendar to be created.
Throws: IllegalArgumentException – If any individual parameter's value is outside the maximum value constraint for the field as determined by the Date/Time Data Mapping table in XMLGregorianCalendar or if the composite values constitute an invalid XMLGregorianCalendar instance as determined by XMLGregorianCalendar.isValid().
Returns: XMLGregorianCalendar created from specified values./**
     * Constructor of value spaces that a
     * {@code java.util.GregorianCalendar} instance would need to convert to an
     * {@code XMLGregorianCalendar} instance.
     *
     * <p>{@code XMLGregorianCalendar eon} and
     * {@code fractionalSecond} are set to {@code null}
     *
     * <p>A {@link DatatypeConstants#FIELD_UNDEFINED} value indicates that field is not set.
     *
     * @param year of {@code XMLGregorianCalendar} to be created.
     * @param month of {@code XMLGregorianCalendar} to be created.
     * @param day of {@code XMLGregorianCalendar} to be created.
     * @param hour of {@code XMLGregorianCalendar} to be created.
     * @param minute of {@code XMLGregorianCalendar} to be created.
     * @param second of {@code XMLGregorianCalendar} to be created.
     * @param millisecond of {@code XMLGregorianCalendar} to be created.
     * @param timezone of {@code XMLGregorianCalendar} to be created.
     *
     * @return {@code XMLGregorianCalendar} created from specified values.
     *
     * @throws IllegalArgumentException If any individual parameter's value is outside the maximum value constraint for the field
     *   as determined by the Date/Time Data Mapping table in {@link XMLGregorianCalendar}
     *   or if the composite values constitute an invalid {@code XMLGregorianCalendar} instance
     *   as determined by {@link XMLGregorianCalendar#isValid()}.
     */
    public XMLGregorianCalendar newXMLGregorianCalendar(
            final int year,
            final int month,
            final int day,
            final int hour,
            final int minute,
            final int second,
            final int millisecond,
            final int timezone) {

            // year may be undefined
            BigInteger realYear = (year != DatatypeConstants.FIELD_UNDEFINED) ? BigInteger.valueOf((long) year) : null;

            // millisecond may be undefined
            // millisecond must be >= 0 millisecond <= 1000
            BigDecimal realMillisecond = null; // undefined value
            if (millisecond != DatatypeConstants.FIELD_UNDEFINED) {
                    if (millisecond < 0 || millisecond > 1000) {
                            throw new IllegalArgumentException(
                                                    "javax.xml.datatype.DatatypeFactory#newXMLGregorianCalendar("
                                                    + "int year, int month, int day, int hour, int minute, int second, int millisecond, int timezone)"
                                                    + "with invalid millisecond: " + millisecond
                                                    );
                    }

                    realMillisecond = BigDecimal.valueOf((long) millisecond).movePointLeft(3);
            }

            return newXMLGregorianCalendar(
                    realYear,
                    month,
                    day,
                    hour,
                    minute,
                    second,
                    realMillisecond,
                    timezone
            );
    }

    Create a Java representation of XML Schema builtin datatype date or g*. For example, an instance of gYear can be created invoking this factory with month and day parameters set to DatatypeConstants.FIELD_UNDEFINED. 
A DatatypeConstants.FIELD_UNDEFINED value indicates that field is not set. 
Params: year – of XMLGregorianCalendar to be created.
month – of XMLGregorianCalendar to be created.
day – of XMLGregorianCalendar to be created.
timezone – offset in minutes. DatatypeConstants.FIELD_UNDEFINED indicates optional field is not set.
Throws: IllegalArgumentException – If any individual parameter's value is outside the maximum value constraint for the field as determined by the Date/Time Data Mapping table in XMLGregorianCalendar or if the composite values constitute an invalid XMLGregorianCalendar instance as determined by XMLGregorianCalendar.isValid().
See Also: DatatypeConstants.FIELD_UNDEFINED
Returns: XMLGregorianCalendar created from parameter values./**
     * Create a Java representation of XML Schema builtin datatype {@code date} or {@code g*}.
     *
     * <p>For example, an instance of {@code gYear} can be created invoking this factory
     * with {@code month} and {@code day} parameters set to
     * {@link DatatypeConstants#FIELD_UNDEFINED}.
     *
     * <p>A {@link DatatypeConstants#FIELD_UNDEFINED} value indicates that field is not set.
     *
     * @param year of {@code XMLGregorianCalendar} to be created.
     * @param month of {@code XMLGregorianCalendar} to be created.
     * @param day of {@code XMLGregorianCalendar} to be created.
     * @param timezone offset in minutes. {@link DatatypeConstants#FIELD_UNDEFINED} indicates optional field is not set.
     *
     * @return {@code XMLGregorianCalendar} created from parameter values.
     *
     * @see DatatypeConstants#FIELD_UNDEFINED
     *
     * @throws IllegalArgumentException If any individual parameter's value is outside the maximum value constraint for the field
     *   as determined by the Date/Time Data Mapping table in {@link XMLGregorianCalendar}
     *   or if the composite values constitute an invalid {@code XMLGregorianCalendar} instance
     *   as determined by {@link XMLGregorianCalendar#isValid()}.
     */
    public XMLGregorianCalendar newXMLGregorianCalendarDate(
            final int year,
            final int month,
            final int day,
            final int timezone) {

            return newXMLGregorianCalendar(
                    year,
                    month,
                    day,
                    DatatypeConstants.FIELD_UNDEFINED, // hour
                    DatatypeConstants.FIELD_UNDEFINED, // minute
                    DatatypeConstants.FIELD_UNDEFINED, // second
                    DatatypeConstants.FIELD_UNDEFINED, // millisecond
                    timezone);
            }

    Create a Java instance of XML Schema builtin datatype time. A DatatypeConstants.FIELD_UNDEFINED value indicates that field is not set. 
Params: hours – number of hours
minutes – number of minutes
seconds – number of seconds
timezone – offset in minutes. DatatypeConstants.FIELD_UNDEFINED indicates optional field is not set.
Throws: IllegalArgumentException – If any individual parameter's value is outside the maximum value constraint for the field as determined by the Date/Time Data Mapping table in XMLGregorianCalendar or if the composite values constitute an invalid XMLGregorianCalendar instance as determined by XMLGregorianCalendar.isValid().
See Also: DatatypeConstants.FIELD_UNDEFINED
Returns: XMLGregorianCalendar created from parameter values./**
     * Create a Java instance of XML Schema builtin datatype {@code time}.
     *
     * <p>A {@link DatatypeConstants#FIELD_UNDEFINED} value indicates that field is not set.
     *
     * @param hours number of hours
     * @param minutes number of minutes
     * @param seconds number of seconds
     * @param timezone offset in minutes. {@link DatatypeConstants#FIELD_UNDEFINED} indicates optional field is not set.
     *
     * @return {@code XMLGregorianCalendar} created from parameter values.
     *
     * @throws IllegalArgumentException If any individual parameter's value is outside the maximum value constraint for the field
     *   as determined by the Date/Time Data Mapping table in {@link XMLGregorianCalendar}
     *   or if the composite values constitute an invalid {@code XMLGregorianCalendar} instance
     *   as determined by {@link XMLGregorianCalendar#isValid()}.
     *
     * @see DatatypeConstants#FIELD_UNDEFINED
     */
    public XMLGregorianCalendar newXMLGregorianCalendarTime(
            final int hours,
            final int minutes,
            final int seconds,
            final int timezone) {

            return newXMLGregorianCalendar(
                    DatatypeConstants.FIELD_UNDEFINED, // Year
                    DatatypeConstants.FIELD_UNDEFINED, // Month
                    DatatypeConstants.FIELD_UNDEFINED, // Day
                    hours,
                    minutes,
                    seconds,
                    DatatypeConstants.FIELD_UNDEFINED, //Millisecond
                    timezone);
    }

    Create a Java instance of XML Schema builtin datatype time.
A null value indicates that field is not set. 
A DatatypeConstants.FIELD_UNDEFINED value indicates that field is not set. 
Params: hours – number of hours
minutes – number of minutes
seconds – number of seconds
fractionalSecond – value of null indicates that this optional field is not set.
timezone – offset in minutes. DatatypeConstants.FIELD_UNDEFINED indicates optional field is not set.
Throws: IllegalArgumentException – If any individual parameter's value is outside the maximum value constraint for the field as determined by the Date/Time Data Mapping table in XMLGregorianCalendar or if the composite values constitute an invalid XMLGregorianCalendar instance as determined by XMLGregorianCalendar.isValid().
See Also: DatatypeConstants.FIELD_UNDEFINED
Returns: XMLGregorianCalendar created from parameter values./**
     * Create a Java instance of XML Schema builtin datatype time.
     *
     * <p>A {@code null} value indicates that field is not set.
     * <p>A {@link DatatypeConstants#FIELD_UNDEFINED} value indicates that field is not set.
     *
     * @param hours number of hours
     * @param minutes number of minutes
     * @param seconds number of seconds
     * @param fractionalSecond value of {@code null} indicates that this optional field is not set.
     * @param timezone offset in minutes. {@link DatatypeConstants#FIELD_UNDEFINED} indicates optional field is not set.
     *
     * @return {@code XMLGregorianCalendar} created from parameter values.
     *
     * @see DatatypeConstants#FIELD_UNDEFINED
     *
     * @throws IllegalArgumentException If any individual parameter's value is outside the maximum value constraint for the field
     *   as determined by the Date/Time Data Mapping table in {@link XMLGregorianCalendar}
     *   or if the composite values constitute an invalid {@code XMLGregorianCalendar} instance
     *   as determined by {@link XMLGregorianCalendar#isValid()}.
     */
    public XMLGregorianCalendar newXMLGregorianCalendarTime(
            final int hours,
            final int minutes,
            final int seconds,
            final BigDecimal fractionalSecond,
            final int timezone) {

            return newXMLGregorianCalendar(
                    null, // year
                    DatatypeConstants.FIELD_UNDEFINED, // month
                    DatatypeConstants.FIELD_UNDEFINED, // day
                    hours,
                    minutes,
                    seconds,
                    fractionalSecond,
                    timezone);
            }

    Create a Java instance of XML Schema builtin datatype time.
A DatatypeConstants.FIELD_UNDEFINED value indicates that field is not set. 
Params: hours – number of hours
minutes – number of minutes
seconds – number of seconds
milliseconds – number of milliseconds
timezone – offset in minutes. DatatypeConstants.FIELD_UNDEFINED indicates optional field is not set.
Throws: IllegalArgumentException – If any individual parameter's value is outside the maximum value constraint for the field as determined by the Date/Time Data Mapping table in XMLGregorianCalendar or if the composite values constitute an invalid XMLGregorianCalendar instance as determined by XMLGregorianCalendar.isValid().
See Also: DatatypeConstants.FIELD_UNDEFINED
Returns: XMLGregorianCalendar created from parameter values./**
     * Create a Java instance of XML Schema builtin datatype time.
     *
     * <p>A {@link DatatypeConstants#FIELD_UNDEFINED} value indicates that field is not set.
     *
     * @param hours number of hours
     * @param minutes number of minutes
     * @param seconds number of seconds
     * @param milliseconds number of milliseconds
     * @param timezone offset in minutes. {@link DatatypeConstants#FIELD_UNDEFINED} indicates optional field is not set.
     *
     * @return {@code XMLGregorianCalendar} created from parameter values.
     *
     * @see DatatypeConstants#FIELD_UNDEFINED
     *
     * @throws IllegalArgumentException If any individual parameter's value is outside the maximum value constraint for the field
     *   as determined by the Date/Time Data Mapping table in {@link XMLGregorianCalendar}
     *   or if the composite values constitute an invalid {@code XMLGregorianCalendar} instance
     *   as determined by {@link XMLGregorianCalendar#isValid()}.
     */
    public XMLGregorianCalendar newXMLGregorianCalendarTime(
            final int hours,
            final int minutes,
            final int seconds,
            final int milliseconds,
            final int timezone) {

            // millisecond may be undefined
            // millisecond must be >= 0 millisecond <= 1000
            BigDecimal realMilliseconds = null; // undefined value
            if (milliseconds != DatatypeConstants.FIELD_UNDEFINED) {
                    if (milliseconds < 0 || milliseconds > 1000) {
                            throw new IllegalArgumentException(
                                                    "javax.xml.datatype.DatatypeFactory#newXMLGregorianCalendarTime("
                                                    + "int hours, int minutes, int seconds, int milliseconds, int timezone)"
                                                    + "with invalid milliseconds: " + milliseconds
                                                    );
                    }

                    realMilliseconds = BigDecimal.valueOf((long) milliseconds).movePointLeft(3);
            }

            return newXMLGregorianCalendarTime(
                    hours,
                    minutes,
                    seconds,
                    realMilliseconds,
                    timezone
            );
    }
}
`java.util.GregorianCalendar` field	`javax.xml.datatype.XMLGregorianCalendar` field
`ERA == GregorianCalendar.BC ? -YEAR : YEAR`	`XMLGregorianCalendar.setYear(int year)`
`MONTH + 1`	`XMLGregorianCalendar.setMonth(int month)`
`DAY_OF_MONTH`	`XMLGregorianCalendar.setDay(int day)`
`HOUR_OF_DAY, MINUTE, SECOND, MILLISECOND`	`XMLGregorianCalendar.setTime(int hour, int minute, int second, BigDecimal fractional)`
`(ZONE_OFFSET + DST_OFFSET) / (601000)` (in minutes)*	`XMLGregorianCalendar.setTimezone(int offset)`^*
Returns:	A new instance of the `DatatypeFactory` builtin system-default implementation.
Since:	9
Throws:	DatatypeConfigurationException – If the implementation is not available or cannot be instantiated.
See Also:	newInstance(String factoryClassName, ClassLoader classLoader)
Returns:	New instance of a `DatatypeFactory`
Params:	factoryClassName – fully qualified factory class name that provides implementation of `javax.xml.datatype.DatatypeFactory`. classLoader – `ClassLoader` used to load the factory class. If `null` current `Thread`'s context classLoader is used to load the factory class.
Throws:	DatatypeConfigurationException – if `factoryClassName` is `null`, or the factory class cannot be loaded, instantiated.
See Also:	newInstance()
Returns:	New instance of a `DatatypeFactory`
Since:	1.6
Params:	lexicalRepresentation – `String` representation of a `Duration`.
Throws:	IllegalArgumentException – If `lexicalRepresentation` is not a valid representation of a `Duration`. UnsupportedOperationException – If implementation cannot support requested values. NullPointerException – if `lexicalRepresentation` is `null`.
Returns:	New `Duration` created from parsing the `lexicalRepresentation`.
Params:	durationInMilliSeconds – Duration in milliseconds to create.
Returns:	New `Duration` representing `durationInMilliSeconds`.
Params:	isPositive – Set to `false` to create a negative duration. When the length of the duration is zero, this parameter will be ignored. years – of this `Duration` months – of this `Duration` days – of this `Duration` hours – of this `Duration` minutes – of this `Duration` seconds – of this `Duration`
Throws:	IllegalArgumentException – If the values are not a valid representation of a `Duration`: if all the fields (years, months, ...) are null or if any of the fields is negative. UnsupportedOperationException – If implementation cannot support requested values.
Returns:	New `Duration` created from the specified values.
Params:	lexicalRepresentation – Lexical representation of a duration.
Throws:	IllegalArgumentException – If `lexicalRepresentation` is not a valid representation of a `Duration` expressed only in terms of days and time. UnsupportedOperationException – If implementation cannot support requested values. NullPointerException – If `lexicalRepresentation` is `null`.
Returns:	New `Duration` created using the specified `lexicalRepresentation`.
Params:	durationInMilliseconds – Milliseconds of `Duration` to create.
See Also:	* XQuery 1.0 and XPath 2.0 Data Model, xdt:dayTimeDuration
Returns:	New `Duration` created with the specified `durationInMilliseconds`.
Params:	cal – `java.util.GregorianCalendar` used to create `XMLGregorianCalendar`
Throws:	NullPointerException – If `cal` is `null`.
Returns:	`XMLGregorianCalendar` created from `java.util.GregorianCalendar`
Params:	year – of `XMLGregorianCalendar` to be created. month – of `XMLGregorianCalendar` to be created. day – of `XMLGregorianCalendar` to be created. hour – of `XMLGregorianCalendar` to be created. minute – of `XMLGregorianCalendar` to be created. second – of `XMLGregorianCalendar` to be created. fractionalSecond – of `XMLGregorianCalendar` to be created. timezone – of `XMLGregorianCalendar` to be created.
Throws:	IllegalArgumentException – If any individual parameter's value is outside the maximum value constraint for the field as determined by the Date/Time Data Mapping table in `XMLGregorianCalendar` or if the composite values constitute an invalid `XMLGregorianCalendar` instance as determined by `XMLGregorianCalendar.isValid()`.
Returns:	`XMLGregorianCalendar` created from specified values.
Params:	hours – number of hours minutes – number of minutes seconds – number of seconds timezone – offset in minutes. `DatatypeConstants.FIELD_UNDEFINED` indicates optional field is not set.
Throws:	IllegalArgumentException – If any individual parameter's value is outside the maximum value constraint for the field as determined by the Date/Time Data Mapping table in `XMLGregorianCalendar` or if the composite values constitute an invalid `XMLGregorianCalendar` instance as determined by `XMLGregorianCalendar.isValid()`.
See Also:	DatatypeConstants.FIELD_UNDEFINED
Returns:	`XMLGregorianCalendar` created from parameter values.
/

java/ 10/ java.xml/javax/xml/datatype/DatatypeFactory.java

Tip for Trouble-shooting
