javax.xml.datatype

## Class DatatypeFactory

- java.lang.Object
- - javax.xml.datatype.DatatypeFactory

-     public abstract class DatatypeFactory
      extends Object

  Factory that creates new `javax.xml.datatype` `Object`s that map XML to/from Java `Object`s.

  `newInstance()` is used to create a new `DatatypeFactory`. The following implementation resolution mechanisms are used in the following order:

  1. If the system property specified by `DATATYPEFACTORY_PROPERTY`, "`javax.xml.datatype.DatatypeFactory`", exists, a class with the name of the property's value is instantiated. Any Exception thrown during the instantiation process is wrapped as a `DatatypeConfigurationException`.
  2. If the file ${JAVA_HOME}/lib/jaxp.properties exists, it is loaded in a `Properties` `Object`. The `Properties` `Object` is then queried for the property as documented in the prior step and processed as documented in the prior step.
  3. The services resolution mechanism is used, e.g. `META-INF/services/java.xml.datatype.DatatypeFactory`. Any Exception thrown during the instantiation process is wrapped as a `DatatypeConfigurationException`.
  4. 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`.
  Since:
    1.5

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `static String` | `DATATYPEFACTORY_IMPLEMENTATION_CLASS` Default implementation class name as defined in JSR 206: Java(TM) API for XML Processing (JAXP) 1.3.
    `static String` | `DATATYPEFACTORY_PROPERTY` Default property name as defined in JSR 206: Java(TM) API for XML Processing (JAXP) 1.3.

  - ### Constructor Summary

    Constructors
    Modifier | Constructor and Description
    --- | ---
    `protected` | `DatatypeFactory()` Protected constructor to prevent instaniation outside of package.

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `abstract Duration` | `newDuration(boolean isPositive, BigInteger years, BigInteger months, BigInteger days, BigInteger hours, BigInteger minutes, BigDecimal seconds)` Obtain a new instance of a `Duration` specifying the `Duration` as isPositive, years, months, days, hours, minutes, seconds.
    `Duration` | `newDuration(boolean isPositive, int years, int months, int days, int hours, int minutes, int seconds)` Obtain a new instance of a `Duration` specifying the `Duration` as isPositive, years, months, days, hours, minutes, seconds.
    `abstract Duration` | `newDuration(long durationInMilliSeconds)` Obtain a new instance of a `Duration` specifying the `Duration` as milliseconds.
    `abstract Duration` | `newDuration(String lexicalRepresentation)` 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.
    `Duration` | `newDurationDayTime(boolean isPositive, BigInteger day, BigInteger hour, BigInteger minute, BigInteger second)` 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.
    `Duration` | `newDurationDayTime(boolean isPositive, int day, int hour, int minute, int second)` 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.
    `Duration` | `newDurationDayTime(long durationInMilliseconds)` 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.
    `Duration` | `newDurationDayTime(String lexicalRepresentation)` Create a `Duration` of type `xdt:dayTimeDuration` by parsing its `String` representation, "PnDTnHnMnS", XQuery 1.0 and XPath 2.0 Data Model, xdt:dayTimeDuration.
    `Duration` | `newDurationYearMonth(boolean isPositive, BigInteger year, BigInteger month)` 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.
    `Duration` | `newDurationYearMonth(boolean isPositive, int year, int month)` 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.
    `Duration` | `newDurationYearMonth(long durationInMilliseconds)` 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.
    `Duration` | `newDurationYearMonth(String lexicalRepresentation)` Create a `Duration` of type `xdt:yearMonthDuration` by parsing its `String` representation, "PnYnM", XQuery 1.0 and XPath 2.0 Data Model, xdt:yearMonthDuration.
    `static DatatypeFactory` | `newInstance()` Obtain a new instance of a `DatatypeFactory`.
    `static DatatypeFactory` | `newInstance(String factoryClassName, ClassLoader classLoader)` Obtain a new instance of a `DatatypeFactory` from class name.
    `abstract XMLGregorianCalendar` | `newXMLGregorianCalendar()` Create a new instance of an `XMLGregorianCalendar`.
    `abstract XMLGregorianCalendar` | `newXMLGregorianCalendar(BigInteger year, int month, int day, int hour, int minute, int second, BigDecimal fractionalSecond, int timezone)` Constructor allowing for complete value spaces allowed by W3C XML Schema 1.0 recommendation for xsd:dateTime and related builtin datatypes.
    `abstract XMLGregorianCalendar` | `newXMLGregorianCalendar(GregorianCalendar cal)` Create an `XMLGregorianCalendar` from a `GregorianCalendar`.
    `XMLGregorianCalendar` | `newXMLGregorianCalendar(int year, int month, int day, int hour, int minute, int second, int millisecond, int timezone)` Constructor of value spaces that a `java.util.GregorianCalendar` instance would need to convert to an `XMLGregorianCalendar` instance.
    `abstract XMLGregorianCalendar` | `newXMLGregorianCalendar(String lexicalRepresentation)` Create a new XMLGregorianCalendar by parsing the String as a lexical representation.
    `XMLGregorianCalendar` | `newXMLGregorianCalendarDate(int year, int month, int day, int timezone)` Create a Java representation of XML Schema builtin datatype `date` or `g*`.
    `XMLGregorianCalendar` | `newXMLGregorianCalendarTime(int hours, int minutes, int seconds, BigDecimal fractionalSecond, int timezone)` Create a Java instance of XML Schema builtin datatype time.
    `XMLGregorianCalendar` | `newXMLGregorianCalendarTime(int hours, int minutes, int seconds, int timezone)` Create a Java instance of XML Schema builtin datatype `time`.
    `XMLGregorianCalendar` | `newXMLGregorianCalendarTime(int hours, int minutes, int seconds, int milliseconds, int timezone)` Create a Java instance of XML Schema builtin datatype time.

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Field Detail

    - #### DATATYPEFACTORY_PROPERTY

          public static final String DATATYPEFACTORY_PROPERTY

      Default property name as defined in JSR 206: Java(TM) API for XML Processing (JAXP) 1.3.

      Default value is `javax.xml.datatype.DatatypeFactory`.

      See Also:
        Constant Field Values

    - #### DATATYPEFACTORY_IMPLEMENTATION_CLASS

          public static final String DATATYPEFACTORY_IMPLEMENTATION_CLASS

      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.

  - ### Constructor Detail

    - #### DatatypeFactory

          protected DatatypeFactory()

      Protected constructor to prevent instaniation outside of package.

      Use `newInstance()` to create a `DatatypeFactory`.

  - ### Method Detail

    - #### newInstance

          public static DatatypeFactory newInstance()
                                             throws DatatypeConfigurationException

      Obtain a new instance of a `DatatypeFactory`.

      The implementation resolution mechanisms are defined in this `Class`'s documentation.

      Returns:
        New instance of a `DatatypeFactory`
      Throws:
        `DatatypeConfigurationException` - If the implementation is not available or cannot be instantiated.
      See Also:
        `newInstance(String factoryClassName, ClassLoader classLoader)`

    - #### newInstance

          public static DatatypeFactory newInstance(String factoryClassName,
                                    ClassLoader classLoader)
                                             throws DatatypeConfigurationException

      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 ....

      Parameters:
        `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.
      Returns:
        New instance of a `DatatypeFactory`
      Throws:
        `DatatypeConfigurationException` - if `factoryClassName` is `null`, or the factory class cannot be loaded, instantiated.
      Since:
        1.6
      See Also:
        `newInstance()`

    - #### newDuration

          public abstract Duration newDuration(String lexicalRepresentation)

      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 availabe 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.

      Parameters:
        `lexicalRepresentation` - `String` representation of a `Duration`.
      Returns:
        New `Duration` created from parsing the `lexicalRepresentation`.
      Throws:
        `IllegalArgumentException` - If `lexicalRepresentation` is not a valid representation of a `Duration`.
        `UnsupportedOperationException` - If implementation cannot support requested values.
        `NullPointerException` - if `lexicalRepresentation` is `null`.

    - #### newDuration

          public abstract Duration newDuration(long durationInMilliSeconds)

      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 availabe 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.

      Parameters:
        `durationInMilliSeconds` - Duration in milliseconds to create.
      Returns:
        New `Duration` representing `durationInMilliSeconds`.

    - #### newDuration

          public abstract Duration newDuration(boolean isPositive,
                             BigInteger years,
                             BigInteger months,
                             BigInteger days,
                             BigInteger hours,
                             BigInteger minutes,
                             BigDecimal seconds)

      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.

      Parameters:
        `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`
      Returns:
        New `Duration` created from the specified values.
      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.

    - #### newDuration

          public Duration newDuration(boolean isPositive,
                             int years,
                             int months,
                             int days,
                             int hours,
                             int minutes,
                             int 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.

      Parameters:
        `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`
      Returns:
        New `Duration` created from the specified values.
      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)`

    - #### newDurationDayTime

          public Duration newDurationDayTime(String lexicalRepresentation)

      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 availabe 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.

      Parameters:
        `lexicalRepresentation` - Lexical representation of a duration.
      Returns:
        New `Duration` created using the specified `lexicalRepresentation`.
      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`.

    - #### newDurationDayTime

          public Duration newDurationDayTime(long durationInMilliseconds)

      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 availabe 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.

      Parameters:
        `durationInMilliseconds` - Milliseconds of `Duration` to create.
      Returns:
        New `Duration` created with the specified `durationInMilliseconds`.
      See Also:
        XQuery 1.0 and XPath 2.0 Data Model, xdt:dayTimeDuration

    - #### newDurationDayTime

          public Duration newDurationDayTime(boolean isPositive,
                                    BigInteger day,
                                    BigInteger hour,
                                    BigInteger minute,
                                    BigInteger second)

      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.

      Parameters:
        `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`.
      Returns:
        New `Duration` created with the specified `day`, `hour`, `minute` and `second`.
      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.

    - #### newDurationDayTime

          public Duration newDurationDayTime(boolean isPositive,
                                    int day,
                                    int hour,
                                    int minute,
                                    int second)

      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.

      Parameters:
        `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`.
      Returns:
        New `Duration` created with the specified `day`, `hour`, `minute` and `second`.
      Throws:
        `IllegalArgumentException` - If the values are not a valid representation of a `Duration`: if any of the fields (day, hour, ...) is negative.

    - #### newDurationYearMonth

          public Duration newDurationYearMonth(String lexicalRepresentation)

      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 availabe 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.

      Parameters:
        `lexicalRepresentation` - Lexical representation of a duration.
      Returns:
        New `Duration` created using the specified `lexicalRepresentation`.
      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`.

    - #### newDurationYearMonth

          public Duration newDurationYearMonth(long durationInMilliseconds)

      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 availabe 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.

      Parameters:
        `durationInMilliseconds` - Milliseconds of `Duration` to create.
      Returns:
        New `Duration` created using the specified `durationInMilliseconds`.

    - #### newDurationYearMonth

          public Duration newDurationYearMonth(boolean isPositive,
                                      BigInteger year,
                                      BigInteger month)

      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.

      Parameters:
        `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`.
      Returns:
        New `Duration` created using the specified `year` and `month`.
      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.

    - #### newDurationYearMonth

          public Duration newDurationYearMonth(boolean isPositive,
                                      int year,
                                      int month)

      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.

      Parameters:
        `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`.
      Returns:
        New `Duration` created using the specified `year` and `month`.
      Throws:
        `IllegalArgumentException` - If the values are not a valid representation of a `Duration`: if any of the fields (year, month) is negative.

    - #### newXMLGregorianCalendar

          public abstract XMLGregorianCalendar newXMLGregorianCalendar()

      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.

    - #### newXMLGregorianCalendar

          public abstract XMLGregorianCalendar newXMLGregorianCalendar(String lexicalRepresentation)

      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.

      Parameters:
        `lexicalRepresentation` - Lexical representation of one the eight XML Schema date/time datatypes.
      Returns:
        `XMLGregorianCalendar` created from the `lexicalRepresentation`.
      Throws:
        `IllegalArgumentException` - If the `lexicalRepresentation` is not a valid `XMLGregorianCalendar`.
        `NullPointerException` - If `lexicalRepresentation` is `null`.

    - #### newXMLGregorianCalendar

          public abstract XMLGregorianCalendar newXMLGregorianCalendar(GregorianCalendar cal)

      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()`.
      Parameters:
        `cal` - `java.util.GregorianCalendar` used to create `XMLGregorianCalendar`
      Returns:
        `XMLGregorianCalendar` created from `java.util.GregorianCalendar`
      Throws:
        `NullPointerException` - If `cal` is `null`.

    - #### newXMLGregorianCalendar

          public abstract XMLGregorianCalendar newXMLGregorianCalendar(BigInteger year,
                                                     int month,
                                                     int day,
                                                     int hour,
                                                     int minute,
                                                     int second,
                                                     BigDecimal fractionalSecond,
                                                     int timezone)

      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.

      Parameters:
        `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.
      Returns:
        `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 `XMLGregorianCalendar` or if the composite values constitute an invalid `XMLGregorianCalendar` instance as determined by `XMLGregorianCalendar.isValid()`.

    - #### newXMLGregorianCalendar

          public XMLGregorianCalendar newXMLGregorianCalendar(int year,
                                                     int month,
                                                     int day,
                                                     int hour,
                                                     int minute,
                                                     int second,
                                                     int millisecond,
                                                     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.

      Parameters:
        `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.
      Returns:
        `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 `XMLGregorianCalendar` or if the composite values constitute an invalid `XMLGregorianCalendar` instance as determined by `XMLGregorianCalendar.isValid()`.

    - #### newXMLGregorianCalendarDate

          public XMLGregorianCalendar newXMLGregorianCalendarDate(int year,
                                                         int month,
                                                         int day,
                                                         int 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.

      Parameters:
        `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.
      Returns:
        `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 `XMLGregorianCalendar` or if the composite values constitute an invalid `XMLGregorianCalendar` instance as determined by `XMLGregorianCalendar.isValid()`.
      See Also:
        `DatatypeConstants.FIELD_UNDEFINED`

    - #### newXMLGregorianCalendarTime

          public XMLGregorianCalendar newXMLGregorianCalendarTime(int hours,
                                                         int minutes,
                                                         int seconds,
                                                         int timezone)

      Create a Java instance of XML Schema builtin datatype `time`.

      A `DatatypeConstants.FIELD_UNDEFINED` value indicates that field is not set.

      Parameters:
        `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.
      Returns:
        `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 `XMLGregorianCalendar` or if the composite values constitute an invalid `XMLGregorianCalendar` instance as determined by `XMLGregorianCalendar.isValid()`.
      See Also:
        `DatatypeConstants.FIELD_UNDEFINED`

    - #### newXMLGregorianCalendarTime

          public XMLGregorianCalendar newXMLGregorianCalendarTime(int hours,
                                                         int minutes,
                                                         int seconds,
                                                         BigDecimal fractionalSecond,
                                                         int 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.

      Parameters:
        `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.
      Returns:
        `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 `XMLGregorianCalendar` or if the composite values constitute an invalid `XMLGregorianCalendar` instance as determined by `XMLGregorianCalendar.isValid()`.
      See Also:
        `DatatypeConstants.FIELD_UNDEFINED`

    - #### newXMLGregorianCalendarTime

          public XMLGregorianCalendar newXMLGregorianCalendarTime(int hours,
                                                         int minutes,
                                                         int seconds,
                                                         int milliseconds,
                                                         int timezone)

      Create a Java instance of XML Schema builtin datatype time.

      A `DatatypeConstants.FIELD_UNDEFINED` value indicates that field is not set.

      Parameters:
        `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.
      Returns:
        `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 `XMLGregorianCalendar` or if the composite values constitute an invalid `XMLGregorianCalendar` instance as determined by `XMLGregorianCalendar.isValid()`.
      See Also:
        `DatatypeConstants.FIELD_UNDEFINED`

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